Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Request for the production and fitting of high pressure valve springs for a rear hydraulic shock damper on an experimental 40/50 chassis. | ||
| View original record | C. Hs/Rm. X235 BY/HEB11/M.6.1.27. 40/50 CHASSIS. REAR HYDRAULIC SHOCK DAMPER SEC: 7150. RE L.P. AND H.P. VALVE SPRINGS TO GIVE BALL PIN LOADS OF 60 LBS. AND 80 LBS. Herewith please receive two Blue… | ||
| Scan002 | Instructions to produce and fit a new High Pressure Valve Spring for the front hydraulic shock damper on the 20-HP chassis. | ||
| View original record | RHO C. Hs/Rm. 4235 BY/HEB2/M.13.1.27 20-HP. CHASSIS. FRONT HYDRAULIC SHOCK DAMPER SEC:7160 Herewith please receive two prints of:- F.54807 High Pressure Valve Spring. 2 off per chassis. Kindly produce… | ||
| Scan003 | Proposal to experimentally try a spring-controlled ball at the apex of the torque arm to minimise wear and obviate issues with the spring. | ||
| View original record | To EY. from Hs/Rm. X235 Hs/Rm3/LG1711.27 TORQUE ARM BALL JOINT. (8240 We should like to try experimentally a spring controlled ball at the apex of the torque arm. There are two reasons for this :- (a)… | ||
| Scan004 | Comparing two shock damper springs to achieve a required load of 80 lbs. | ||
| View original record | To BY/HEB. from Hs/Rm. X235 Hs/Rm1/LG19.1.27. SHOCK DAMPER SPRING. The spring F.76429 gives 90 lbs. load at 13.5° radius. We have previously tested spring F.74515 which gives 150 lbs. in the rear… | ||
| Scan005 | Suitability of leather covers for rear hydraulic connecting links, proposing a metal alternative. | ||
| View original record | X235 To BY. from Hs/GWH. c. to DA. Hs/GWH/LG27.1.27 RE. LEATHER COVERS FOR REAR HYDRAULIC CONNECTING LINKS. We find that F.75084 top cover of front hydraulic connecting link is quite suitable for the… | ||
| Scan006 | The reduction of front braking and checking for obsolete hydraulic dampers on experimental 40/50 HP cars. | ||
| View original record | To RHC. from Hs/Rn. x235 +8420 Hs/RnL/LG28.1.27. Will you please arrange for the front braking to be reduced on all experimental 40/50 HP. cars as opportunity occurs. This means either fitting levers… | ||
| Scan007 | Load testing and selection of a suitable rear shock damper spring for the Phantom Chassis. | ||
| View original record | Hs/Rm. X235 BY/HEB7/M.31.1.27. PHANTOM CHASSIS. REAR SHOCK DAMPER H.P. SPRING. With reference to Hs/Rm1/LG.19.1.27, we note that spring F.76429 gives 90 lbs. load at end of 13.000" Lever. On looking… | ||
| Scan008 | Testing of spring F.75148 and recommending the use of aluminium washers to adjust for variations in shock absorbers. | ||
| View original record | To BY/HEB. from Hs/Rm. X235 X8431 Hs/Rm2/LG1. 2. 2. 27. With reference to BY/HEB7/M31.1.27. We have tested spring F.75148 and find that it gives 105 to 110 lbs. at the end of the 7¾" lever, or about… | ||
| Scan009 | Proposal to modify the steering shock damper by adding bye-passes to facilitate shunting. | ||
| View original record | To EY. Hs. from DA. c. to RG. X235 DA4/ML.2.27. DAMPER IN STEERING. X. 8431 X. 235 We send herewith N.sch.2356, on which is shewn a proposal for cutting out the shock damper on extreme locks so as to… | ||
| Scan010 | Advantages and considerations of hydraulic damping for steering systems. | ||
| View original record | To Hs. DA/HDY. BY. c. to BJ. Wor. E. 1235 X. 8425 X. 235 X. 8431 HYDRAULIC DAMPING OF STEERING. One naturally must not expect too much from this, but I believe it will justify itself if it was the… | ||
| Scan011 | High-pressure valve spring for the Phantom Chassis rear hydraulic shock damper. | ||
| View original record | C. Hs/Rm. X235 BY/HEB8/M.2.2.27. PHANTOM CHASSIS. REAR HYDRAULIC SHOCK DAMPER SEC:7150. HIGH PRESSURE VALVE SPRING TO GIVE 80 LBS. AT BALL PIN. RECEIVED STAMP: FEB 1927 Hs Further to our memo'… | ||
| Scan012 | Mr. Royce's suggestion to experimentally fit both standard hydraulic and Hartford shock absorbers onto fast cars. | ||
| View original record | To BY. from Hs/Rn. +235 Hs/Rn2/LGA, 2.27. SHOCK ABSORBERS. +4426 Sometime ago Mr. Royce suggested that for fast cars it would be advisable to fit both our standard hydraulic dampers and Hartfords. We… | ||
| Scan013 | Modification to hydraulic shock dampers to eliminate a hydraulic knock. | ||
| View original record | To BY. from Hs/Rm. c. to Sft/Mr.Brock. X235. Hs/Rm4/LG9.2.27. HYDRAULIC SHOCK DAMPERS. ======================== We find that in order to eliminate a hydraulic knock in the shock absorbers, it will be… | ||
| Scan014 | Audible knock in the hydraulic shock damper caused by wear and proposing a redesign of the lever bearings. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. HYDRAULIC SHOCK DAMPER. You will recollect that some months ago we reported that an audible knock was set up in the dampers when any… | ||
| Scan015 | Knock from wear and tear, and a test to reduce it by pressure-feeding oil to damper bearings. | ||
| View original record | contd :- -2- The knock with which we are concerned is one which can only come up after a considerable amount of wear and tear has taken place. On the next 20 HP. running 10,000 miles we are feeding… | ||
| Scan016 | Blueprint showing a cross-section of a shaft and bearing assembly. | ||
| View original record | [ "HORIZONTAL GROOVE", "IN SHAFT FOR SMALL", "BEARING", "ANNULAR GROOVE", "030' PASSAGE" ], | ||
| Scan017 | Cause and potential cure for knocks in hydraulic shock dampers. | ||
| View original record | X235 To BY. from Hs/RM. Hs/RmL/LG10.2.27. HYDRAULIC SHOCK DAMPERS. X8520 We are trying to cure knocks on the hydraulic dampers. The only incurable knock is occasioned by play between the main lever… | ||
| Scan018 | Proposals for steering system improvements and experimental trials. | ||
| View original record | To Hs. DAY. BY. from R. c. to BJ. Wor. H. RG. STEERING. I have read with interest Mr. Robotham/Hives memo on the above. We must mind and keep the whole a very practical scheme that will give… | ||
| Scan019 | Design suggestions for hydraulic dampers and 20 HP steering geometry, highlighting workload issues. | ||
| View original record | Da. c. to Hs/Rm. X235 BY8/H10.2.27 X. 8420 X. 235 X. 5430 The Expl: Dept: have reminded us that R. has made a suggestion that for fast cars it would be desirable to fit both our standard hydraulic… | ||
| Scan020 | Severe test for steel bushed shock dampers on vehicle 10-G-111. | ||
| View original record | To RHC. from Hs/Rm. Y835 Hs/RM4/LG10.2.27. SHOCK DAMPERS. We have decided to run the steel bushed dampers off 8-EX on 10-G-111 in France on the front and in order to make the test more severe would… | ||
| Scan021 | Agreement form suggesting an alteration to Depot Sheet No. 22 regarding the interchangeability of dampers on different axle type cars. | ||
| View original record | To Hm. from Hs/Rn. X235 Hs/Rm5/LG14.2.27. AGREEMENT FORM. With reference to para.3 on Depot Sheet No. 22 - marked in red. As Depots are likely to be short of dampers, we suggest that the following… | ||
| Scan022 | Modifications to hydraulic shock damper bearings to overcome operational issues. | ||
| View original record | To Hs. from DA. X235 DA3/M15.2.27. HYDRAULIC SHOCK DAMPERS. X.235 X.8520 We are looking into the question of increasing the area of the bearings to overcome the trouble you mentioned to me in Derby.… | ||
| Scan023 | Proposal for a variable hydraulic shock damper and steering system, controllable manually by the driver or automatically. | ||
| View original record | To Hs. DA. BY. from R. c. to BJ. Wor. RG. E. PN. c. to Mr. Claremont. SHOCK DAMPERS, AXLE AND STEERING. X. 8430 X. 8420 X. 235 We have known for many years that shock dampers should be variable,… | ||
| Scan024 | Request to resolve an issue with fitting a spring-loaded gland on a 20 HP rear hydraulic damper, as it fouls the brake rope. | ||
| View original record | To DA. from Hs/Rn. c. to EY. X235 Hs/Rm6/LG16.2.27. 20 HP. REAR HYDRAULIC DAMPER. The arrangement for this was got out before the spring loaded gland was evolved. On the car which is now going to… | ||
| Scan025 | Experiments with forced lubrication on hydraulic shock dampers and the resulting issue of making the gland oil-tight. | ||
| View original record | To DA. from Hs/Rn. X235 Hs/Rm2/LG21.2.27. HYDRAULIC SHOCK DAMPERS. X235 With reference to DA3/M15.2.26. Whilst we find forced lubrication to the bearing of the shock damper is effective in curing… | ||
| Scan026 | Modified instructions for shock absorber settings and their demonstration. | ||
| View original record | To CWB. from Hs. [Handwritten]: X235 Hs6/LG24. 2.27. SHOCK ABSORBERS. [Handwritten]: X235 / X8520 Attached herewith are modified instructions for shock absorber setting. We find that it is very… | ||
| Scan027 | Guide to shock absorber settings and a troubleshooting table for suspension issues. | ||
| View original record | SHOCK ABSORBERS. For all average running, the best shock absorber setting is 35 - 40 lbs. on the rear and 28 to 32 lbs. on the front. If a car is to be used under widely varying conditions, better… | ||
| Scan028 | Instructions for adjusting and checking the loading of front and rear shock absorbers. | ||
| View original record | contd :- -2- Wash the whole outside of the shock absorber with water. FRONT. Release locking nut and unscrew adjusting nut until it is quite free. Then tighten up adjusting nut with the fingers until… | ||
| Scan029 | Proposal for fitting Hartford shock absorbers to the front axle of the 10-EX model. | ||
| View original record | To BY. Hs. from DA. c. to BJ. t235 DA2/M25. 2. 27. 10-EX SHOCK DAMPERS. X. 8774 X. 235 X. 4426 Herewith we send print of N.sch.2370., shewing how we propose the Hartford shock dampers should be fitted… | ||
| Scan030 | Arrangement of combined Hartford and hydraulic dampers on high-speed cars. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X235. DA4/M4.3.27. COMBINED HARTFORD & HYDRAULIC DAMPERS ON HIGH SPEED CARS. X.4426 X.235 Herewith we send N.sch.2370 shewing the proposed arrangement of hydraulic shock… | ||
| Scan031 | Diagrammatic sketches for provisional patents on hydraulic dampers with variable pressure. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X235 DA2/M4.3.27. HYDRAULIC DAMPERS & VARIABLE PRESSURE. X. 235 X. 8520 We send herewith N.schs. 2373/4. diagrammatic sketches which we made at the request of Mr.… | ||
| Scan032 | Outlining five key requirements for the design of hydraulic shock dampers. | ||
| View original record | To OY. DA. Hs. BY. from R. c. to BJ. Wor. PN. CWB. /235 R1/M5.3.27. HYDRAULIC SHOCK DAMPERS. X.235 X.832 I thank Mr. Olley for his memo. of Feb.18th. Many of the makers have not realised our points of… | ||
| Scan033 | Oil leakage issues in forced feed lubrication systems for hydraulic shock damper bearings and plans for further testing. | ||
| View original record | To DA. from Hs/Rn. Hs/Rm4/LG5.3.27. X235 FORCED FEED LUBRICATION TO HYDRAULIC SHOCK DAMPER BEARINGS. X235 X8520 Further tests which we have recently conducted have demonstrated that we cannot keep the… | ||
| Scan034 | Braking tests for model EAC.V11, comparing stiffened rear brake drums to those on model EAC.Vlll. | ||
| View original record | CERTIFICATE OF INSPECTION ROLLS-ROYCE ENGINES AND To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X235 Hs/Rml/LG 7.3.27. EAC.V11 - BRAKING. 47420 We have carried out tests with rear brake… | ||
| Scan035 | The production programme for rear hydraulic shock dampers and a proposal to test a modification for lever bearings. | ||
| View original record | To DA. from Hs/Rm. X235 Hs/Rm3/LG9.3.27. REAR HYDRAULIC SHOCK DAMPER. X235 X752w We do not wish to worry you unduly about this job, but the position at present is this - the Works are commencing on a… | ||
| Scan036 | Proposed modifications to the rear shock damper casting and shaft to improve wear resistance. | ||
| View original record | To BY. / HS/Rm. } FROM DA. X235 DA1/M14.3.27. SHOCK DAMPER WHEN USED AT REAR. X.235 X.S520 With reference to the question of increasing the bearing area we send herewith N.schs. 2378/9 shewing… | ||
| Scan037 | Requesting the modification of shock absorbers for testing with a gravity feed oil system. | ||
| View original record | To RHC. from Hs/Rm. X235 Hs/Rm10/LG16.3.27. SHOCK ABSORBERS. X235 / X7520 We are endeavouring to get a test on shock absorbers fitted with the gravity feed scheme of oil to the bearings. At the moment… | ||
| Scan038 | Cover memo for sending a copy of requested instructions. | ||
| View original record | X235. To BY. from Hs/Rn. c. to BY/NW. Hs/Rm9/LG16.3.27. Herewith copy of instructions as requested in BY3/H11.3.27. Hs/Rn. | ||
| Scan039 | Guide to shock absorber settings and troubleshooting for common suspension issues. | ||
| View original record | SHOCK ABSORBERS. For all average running, the best shock absorber setting is 35 - 40 lbs. on the rear and 28 to 32 lbs. on the front. If a car is to be used under widely varying conditions, better… | ||
| Scan040 | Instructions for checking the loading and adjusting the settings of front and rear shock absorbers. | ||
| View original record | contd :- Wash the whole outside of the shock absorber with water. FRONT. Release locking nut and unscrew adjusting nut until it is quite free. Then tighten up adjusting nut with the fingers until it… | ||
| Scan041 | Calculations for bearing loads on hydraulic dampers. | ||
| View original record | X235. BEARING LOADS - HYDRAULIC DAMPERS. Length of long arm = 14" " " short " = 1.75" When long arm exerts 80 lbs. pressure on axle, short arm exerts 80 x 14 / 1.75 lbs on piston. = 640 lbs. Resultant… | ||
| Scan042 | Outlining the testing procedure for hydraulic shock absorbers. | ||
| View original record | X235 To WB. from Hs/Rn. HYDRAULIC SHOCK ABSORBER TESTS. The test on hydraulic shock absorbers is as follows :- The present damper should be run for 30 hrs., at the end of that time it should be… | ||
| Scan043 | Specification table for springs in hydraulic dampers, detailing theoretical vs actual measured loads for various part numbers. | ||
| View original record | ROLLS-ROYCE LIMITED DERBY SPRINGS FOR HYDRAULIC DAMPERS. Annotations: X235, X8570 Table of Loads: Piece No. | Theoretical load. | Actual load measured at 7 1/2" lever.… | ||
| Scan044 | Requesting the preparation of a standard front shock absorber and a new version with an increased area bearing for testing. | ||
| View original record | X235 To RHC. from Hs/Rm. Hs/Rm9/LG21.3.27. SHOCK ABSORBER TESTS. X235 Will you please prepare for the shock absorber testing rig one front shock absorber as produced on production at present i.e. with… | ||
| Scan045 | Technical memo outlining a list of eight potential improvements for a vehicle's steering system. | ||
| View original record | X235. To HS. DA. BY. from R. c. to BJ. Wor. CWB. PN. E. R3/M22.3.27. STEERING - GENERAL. X.8430 X.5430 X.7430 X.235 We have now many items to make this better - Increased irreversibility } (1) Nearly… | ||
| Scan046 | And favouring specific steering system design combinations. | ||
| View original record | contd :- -2- you to pick out the best combination. I favour - Very small extra } (a) Just irreversible worm when worn to complication and } good bedding. cost. } (b) Damping by ball ends and pendulum… | ||
| Scan047 | Redesign and testing of hydraulic shock dampers for the 20 HP chassis. | ||
| View original record | X235 Dr. C. Hs. BY9/H. 11.4.27. 20 HP. SHOCK DAMPERS. --------------------- Hs. is running a hydraulic shock damper on the rear axle of the 20 HP. chassis, arranged with a spring loaded gland, as per… | ||
| Scan048 | Failure of hydraulic shock dampers under testing and proposing a re-design. | ||
| View original record | To R. To DA. } FROM HS/RM. c. to BJ. Wor. c. to BY. HS/Rm5/LG11.4.27. HYDRAULIC SHOCK DAMPERS. Intensive tests which we have been carrying out on a rig have demonstrated that the hydraulic damper as… | ||
| Scan049 | Confirming an instruction to plug a small hole in the high-pressure valve on hydraulic shock absorbers. | ||
| View original record | To BY. from Hs/Rm. x235 Hs/Rml/LG11.4.27. HYDRAULIC SHOCK ABSORBERS. Further to our conversation on the above subject. This is to confirm that we xx wish the small hole in the base of the high… | ||
| Scan050 | Requesting the preparation of an O.S. front shock absorber for a 20 HP car. | ||
| View original record | X235 To RHC. from Hs/Rm. Hs/Rm4/LG12.4.27. Will you please prepare :- 1 O.S. front shock absorber for 20 HP. with gravity oil feed to the main lever bearings as previously arranged on 14-EX car. This… | ||
| Scan051 | Letter detailing a fix for leaking hydraulic shock dampers on vehicle 10-G-111. | ||
| View original record | X235 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. 12th. April 1927. The Hotel de France, Chateauroux, Indre, France. Mr. Hancock from Hs/Rn. HYDRAULIC SHOCK DAMPERS. We have ascertained that both the… | ||
| Scan052 | Proposal for mounting hydraulic shock dampers on the rear axle of a 20 HP vehicle. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X235 DA2/M14.4.27. 20 HP. HYDRAULIC SHOCK DAMPERS ON REAR AXLE. X. 235 X.5520 X.7520 With reference to the difficulty of utilising a spring gland in this position on the… | ||
| Scan053 | Improvements and design considerations for the steering worm, nut, and spring return system. | ||
| View original record | To DA. Hs. BY. from R. c. to BJ. Wor. PN. E. CWB. X235 R2/M16.4.27. RE. STEERING WORM AND NUT, X.8430 X.235 AND SPRING RETURN. X.8420 X.457 My impression is that we fairly well know what we want for… | ||
| Scan054 | Steering system design, focusing on self-centering, spring return, and axle proposals. | ||
| View original record | contd :- -2- (4) Finally we come to the self centreing so necessary for slow steering, and quick and safe handling. Here we have schemed the independent spring return, which we want to try with the… | ||
| Scan055 | Modification to shock damper bushes to introduce oil grooves to obviate wear. | ||
| View original record | X235 Sfty. We. c.Hs. c.Mr.EB. BY11/H. 22.4.27. SHOCK DAMPER. MODIFICATION TO SHOCK DAMPER BUSHES TO INTRODUCE OIL GROOVES. The Experimental Dept. have found that they can, to a very great extent,… | ||
| Scan056 | Letter addressing oil leaks from shock absorber glands and providing instructions on fitting new leather packings. | ||
| View original record | X235 Expl: Dept: Rolls-Royce Ltd., Derby, England. 23rd. April 1927. The Hotel de France, Chateauroux, Indre, France. Mr. Hancock from Hs/Rm. We are somewhat perturbed by your reports of oil leaks… | ||
| Scan057 | Eliminating various noises from hydraulic shock absorbers. | ||
| View original record | To OY. from Hs/Rm. (235) Hs/Rm2/LG23.4.27. HYDRAULIC SHOCK DAMPERS. y4590 We have been carefully going over the ground to try and eliminate various noises which are likely to emanate from the RR.… | ||
| Scan058 | The application of a hydraulic shock damper to the 20 HP chassis rear axle, discussing clearance issues and rejecting a proposed bush and gland design. | ||
| View original record | X235 Hs. G. DIY/HED. BY4/H. 26.4.27. 20 HP. CHASSIS. SHOCK DAMPER FOR REAR AXLE. We have received from West Wittering N.Sch.2397 illustrating a method of applying the hydraulic shock damper to the… | ||
| Scan059 | Need for stronger springs for hydraulic shock dampers and side steering tubes. | ||
| View original record | To BY. from Hs/Rm. [Handwritten: X235] Hs/Rm3/LG25.4.27. HYDRAULIC SHOCK DAMPERS. [Handwritten: X235 X8450] We find that in a number of cases we require a much greater low pressure loading than we are… | ||
| Scan060 | Suitability of different types of shock dampers for front and rear axles, comparing European and American specifications. | ||
| View original record | To BJ. from R. c. to OY. Hs. BY. +235 R6/M29.4.27. SHOCK DAMPERS. X.832 X.235 X.4426 Regarding shock dampers our double acting hydraulic ones certainly give the best riding qualities to the car, but… | ||
| Scan061 | Proposal for the 10-EX Sports Model, its performance, and strategic purpose. | ||
| View original record | To BJ. from R. c. to Wor. Hs. LHS. BY. OY. /235. R14/M29.4.27. 10-EX SPORTS MODEL. X.469 X.228 X.8770 X.8774 X.235 We do not propose to make this coarse (as in the case of other sports cars) or one… | ||
| Scan062 | Instructions for fitting extra strong low-pressure valve springs to hydraulic shock dampers on a Phantom Chassis. | ||
| View original record | X235 [Text struck through] C. Hs/Em. EY/HEB12/M.2.5.27. PHANTOM CHASSIS. HYDRAULIC SHOCK DAMPERS SEC:7150/60. EXTRA STRONG LOW PRESSURE VALVE SPRINGS TO GIVE 140-150 LBS. ON BALL PIN WITH 7.500 LEVER… | ||
| Scan063 | Modifications and improvements to the Phantom steering system. | ||
| View original record | To Hs. from R. c. to BJ. Wor. c. to DA. CWB. c. to BY. FN. (235) R4/M3. 5. 27. PHANTOM STEERING - 7-EX X.8430 X.7430 ---------------------- X.5420. X.235 As you know this car has run 10,000 miles in… | ||
| Scan064 | Design proposal for an improved front axle for the 20 HP model, based on the Phantom. | ||
| View original record | contd :- -2- We are designing an improved front axle for the 20 HP. on the lines of the lighter and better Phantom. We are making an attempt at a design of an axle so as to give a parallel lift to the… | ||
| Scan065 | Requesting an alteration to the setting of front hydraulic shock dampers on car 12-EX. | ||
| View original record | To RHC. from Hs/Rm. Y235 B Hs/Rml/LG13.5.27. HYDRAULIC SHOCK DAMPERS. X7520 Will you please alter the setting of the front hydraulic dampers on 12-EX to 50 lbs. up and 50 lbs. down loading. It is… | ||
| Scan066 | Responding to an inquiry about the location of the Hydraulic Shock Absorber file X235. | ||
| View original record | TO HS. FROM E. X235 E2/M13.5.27. re. HYDRAULIC SHOCK ABSORBER FILE - X235. In reply to HS/LG11527., we can find no trace of the above file at "Elmstead", neither do we remember seeing it, or taking it… | ||
| Scan067 | Recommendations for modifications to hydraulic shock dampers for 20 HP and 40/50 HP cars. | ||
| View original record | To BY: from Hs/Rn. x235 Hs/Rml/LG20.5.27. HYDRAULIC SHOCK DAMPERS. x235 x8520 x5520 From the result of tests we have recently carried out we recommend the following modifications to the hydraulic… | ||
| Scan068 | Highlighting two issues with hydraulic shock dampers regarding oil levels and non-return valves. | ||
| View original record | To BY. From Hs/An. c.c. to Mx. c.c. to Hn. c.c. to Wor. V235 Hs/Rn2/LG20.5.27. HYDRAULIC SHOCK DAMPERS. We have recently come against two points in connection with hydraulic shock dampers which we… | ||
| Scan069 | Page showing examples of shock damper test records with graphical readouts. | ||
| View original record | EXAMPLES OF SHOCK DAMPER RECORDS 10G III 10,000 MILES STROKE 6" BALL END 440 STROKES/MIN H.P. LOAD 30 LBS A .060 .620 H.P. VALVE END OF STROKE 147 LBS DAMPER PISTON POOR 220 R.P.M STROKE 6" BALL PIN 7… | ||
| Scan070 | Accessibility and positioning of shock dampers for the axle control on the Phantom & EAC. 7. | ||
| View original record | To Hs. from DA. 4235. DAA/M27.5.27. AXLE CONTROL ) PHANTOM & EAC. 7. X.7420 & X.235 X.8420 & X.8520 You will remember that R. adversely criticised the accessibility of the shock dampers for the axle… | ||
| Scan071 | Shock damper configurations for Australian road conditions. | ||
| View original record | X235 Da. c.Hs. BY3/H. 27.5.27. SPRINGING FOR AUSTRALIA - SHOCK DAMPERS. --------------------- As a result of a discussion and some tests on springing carried out in conjunction with Pt. from… | ||
| Scan072 | Request for a near-side rear shock absorber mounting required for tests on a joggling rig. | ||
| View original record | To RHC. from Hs/Rn. X235. Hs/Rn2/LG27.5.27. Could you please supply us with 1 N.S. rear shock absorber mounting to F.76521. We require these parts for tests on our joggling rig. Hs/Rn. | ||
| Scan073 | Instructions regarding low-pressure loading and air leak settings on 40/50 HP rear hydraulic shock dampers. | ||
| View original record | To BY. from Hs/Rn. x235 Hs/Rn3/LG26.5.27. 40/50 HP. REAR HYDRAULIC SHOCK DAMPERS. x235 x8520 We are anxious to keep the low pressure loading on the 40/50 HP. rear hydraulic shock damper at a minimum… | ||
| Scan074 | Tests on hydraulic shock dampers and spare wheel carriers. | ||
| View original record | To RHC. from Hs/Rn. X235 Vauxhall Hs/Rn2/LGL. 6. 27. We are anxious to test the hydraulic shock damper and Hartford shock absorber on the rear of the bump test. We think that the same arrangement as… | ||
| Scan075 | Graph showing the variation of oil flow with temperature for a hydraulic shock absorber at constant pressure. | ||
| View original record | R.R. HYDRAULIC SHOCK ABSORBER TESTS CURVE SHEWING VARIATION OF OIL FLOW (THRO' HIGH PRESSURE END) WITH TEMPERATURE OIL PRESSURE CONSTANT AT 25 LBS PER SQ. IN. OIL TEMPERATURE (CENTIGRADE) OIL FLOW… | ||
| Scan076 | Modifications to hydraulic shock dampers to prevent audible knocks. | ||
| View original record | To R. From Hs/Rm. c. to BJ. Wor. c. to E. RG. c. to DA. BY. c. to OY. EP. c. to MX. Hm. c. to Ft. /235 Hs/Rm1/LG2.6.27. HYDRAULIC SHOCK DAMPERS. (A) MODIFICATION TO PREVENT KNOCKS. We have been… | ||
| Scan077 | The testing of a valve modification to prevent oil cushioning and the effects of hydraulic dampers. | ||
| View original record | contd :- -2- The theory of the modification is that the oil forms a cusion beneath the valve as it escapes up the guide. We suspected that this oil cusion might prevent the high pressure valve closing… | ||
| Scan078 | Analysis of piston movement, oil viscosity, and cushioning effects in a hydraulic system, comparing front and rear axle performance. | ||
| View original record | contd :- -3- where we have drawn the ball end load against the piston velocity obtained as described later, that with the normal front axle loading the piston travels 10% - 15% of its total stroke… | ||
| Scan079 | Shock damper performance, including methods for measuring efficiency and the effects of extreme conditions. | ||
| View original record | contd :- -4- speed enthusiasts they are best supplemented by Hartfords to damper out the small axle movements that are hydraulically comparatively unrestrained when travelling fast on a good road. The… | ||
| Scan080 | Analysis of shock damper loading concerning axle velocity, oil flow, and viscosity. | ||
| View original record | contd :- -5- conditions should not exceed 10% of the total stroke. Actually the small increase in lost movement with increasing speed is far more than compensated for by the increase in load due to… | ||
| Scan081 | Page of test conclusions and future development directions for a damper, comparing it to a Hartford damper. | ||
| View original record | contd :- -6- As we have no explanation for this we have repeated the tests a number of times and have used other oils having somewhat greater viscosity than the std. shock damper oil. The results,… | ||
| Scan082 | Shock damper, including a diagram and chronograph records from a 10,000-mile test. | ||
| View original record | contd :- -7- utilise the damper to restraine the axle as it approaches maximum bump and maximum rebound by extending the casing and having a helical spring coming in contact with the piston towards… | ||
| Scan083 | Pressure/stroke diagram for a front shock absorber showing load versus movement at different temperatures. | ||
| View original record | TYPICAL PRESSURE/STROKE DIAGRAM OF R.R. FRONT SHOCK ABSORBER. GRAPH I BALL END LOAD LBS. END OF 7.5 LEVER BALL END MOVEMENT INS: 20°C 80°C INCREASED LOAD DUE TO VALVE SPRING RATING MAX. PISTON SPEED… | ||
| Scan084 | Two graphs showing the effects of temperature, load, and piston velocity on high-pressure valve opening. | ||
| View original record | GRAPH II EFFECT OF TEMP. AND LOAD ON HIGH PRESSURE VALVE OPENING OUTSIDE RANGE CONCEIVABLE CONDITIONS % TOTAL STROKE H.P. VALVE OPEN. SHOCK DAMPER OIL TEMP. C° 70 LBS BALL PIN LOAD 150 LBS BALL PIN… | ||
| Scan085 | Graph showing the effect of speed on maximum damper load at different temperatures and pressures. | ||
| View original record | EFFECT OF SPEED ON MAX DAMPER LOAD GRAPH IV BALL PIN LOAD. LBS. AT .75 ARM RADIUS PRESSURE ON PISTON LBS/SQ. IN. HIGH PRESS. END LOW PRESS. END 20°C 80°C A. LOW PRESS BALL LOAD 80 LBS. B. LOW PRESS… | ||
| Scan086 | Graphs illustrating the effects of temperature and stroke rate on damper load and high-pressure valve lift. | ||
| View original record | GRAPH V EFFECT OF TEMP. ON MAX DAMPER LOAD PRESSURE ON PISTON. LBS/D' WORKING FLUID TEMP. C° AXLE VELOCITY 12.5 FT/SEC. AXLE VELOCITY 6.25 FT/SEC. AXLE VELOCITY 3.16 FT/SEC. ALL TESTS H.P. END OF… | ||
| Scan087 | Altered low pressure loadings for shock damper springs on 40/50 HP and 20 HP models. | ||
| View original record | X235 To BY. from Hs/Rm. Hs/Rm3/LG2.6.27. SHOCK DAMPER SPRINGS. With reference to our recent request for altered low pressure loadings of the dampers due to increasing the size of the air leak. We find… | ||
| Scan088 | The alteration and testing of component free lengths and loads before ordering in quantity. | ||
| View original record | contd :- -2- Works at present. We are altering the free lengths of a few as above and will hand them over to you after trying them ourselves so that Mr. Brock can confirm the loads are correct before… | ||
| Scan089 | Nature of resistance in hydraulic shock dampers at high speeds. | ||
| View original record | X. 235. To Hs. from DA. DAL/M9.6.27. HYDRAULIC SHOCK DAMPERS+ With reference to Ms/RmL/LG2.6.27., we suggest that the resistance experienced at high speeds, which appears to be independent of the… | ||
| Scan090 | Report investigating high-speed wobbles, noting that increasing shock absorber load can unexpectedly worsen the issue. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X235 Hs/Rml/LG14.6.27. HIGH SPEED WOBBLES. X457 XL4214 It has been a source of surprise to us that beyond a certain point,… | ||
| Scan091 | Experiments on vehicle wobble, focusing on the effects of engine mass, inertia, shock dampers, and frame rigidity. | ||
| View original record | contd :- -2- The amplitude of the wobble was not very great. Reducing the equivalent engine mass increased the amplitude of the wobble appreciably. We also ascertained that if we increased the moment… | ||
| Scan092 | Comparison of suspension and wobble characteristics for EAC.VII and Hispano models. | ||
| View original record | contd :- -3- | | (A) | | (B) | | |---|---|---|---|---| | | Periodic time for oscillation. | Equivalent road speed wobble in step. | Periodic time for oscillation. | Equivalent road speed wobble in… | ||
| Scan093 | Elimination of high-speed wobbles through damper and spring adjustments. | ||
| View original record | contd :- -4- (2) If ever obstinate cases of high speed wobbles arise, it is of no use to attempt to eliminate them by increasing the front damper loading unless the rear of the car is also suitably… | ||
| Scan094 | Graph and diagrams illustrating frame rigidity and periodicity, comparing Hispano and E.A.C.7 frames. | ||
| View original record | [ "TORQUE LBS / FT.", "1800", "1600", "1200", "800", "400", "HISPANO FRAME", "E.A.C.7 FRAME", "REAR AXLE CLAMPED SOLID TO FRAME.", "FRAME DEFLECTION ANGLE θ", "1°", "2°", "3°", "4°", "3.5"", "P", "θ",… | ||
| Scan095 | Test results and proposed standardization for shock damper loading on 40/50 HP and 20 HP models. | ||
| View original record | To BY. from Hs/Rm. X235 Hs/Rml/LG17.6.27. SHOCK DAMPER LOADING. X235 X8520 Further to our Hs/Rm3/LG2.6.27. We have now tested out springs F.75168 with various free lengths with the following results.… | ||
| Scan096 | Specifications and part numbers for front and rear springs on the 20 HP model. | ||
| View original record | contd :- -2- 20 HP. Front. UP. F.75079 Load 43-47 lbs. Down. F.54807 Load 58-62 lbs. Rear. Up. F.75168 Free length .485 Load 40-45 lbs. Down. F.75148 Load 58-62 lbs. New piece nos. will require… | ||
| Scan097 | Standardisation of chassis parts, specifically hydraulic dampers on the rear. | ||
| View original record | RR 785 REVISED (10H) (DE 649 9-12-26) BM. 2/1167. x235 COMPLETED 20.6.27. STANDARDISATION of CHASSIS PARTS. Date 25.5.27 X No. 235 No. 5520 Drawing No. F.54648 rear Part List F.54500 front Description… | ||
| Scan098 | Standardisation form for chassis parts concerning a hydraulic-brake on the rear. | ||
| View original record | STANDARDISATION OF CHASSIS PARTS. HYDRAULIC-BRAKE ON REAR. X 235 (1) The number of the first chassis on which the new part will be fitted. Not settled. (2) Date when the chassis will be handed to… | ||
| Scan099 | Table comparing theoretical and actual loads for high and low pressure valve springs used in hydraulic dampers. | ||
| View original record | X235 SPRINGS FOR HYDRAULIC DAMPERS. Piece No. Theoretical load. Actual load measured at 7¼" lever. F.75080 70 70 F.75081 75 75 F.75082 80 105) 95) F.75148 105 110 High pressure F.74515 150 150 Valve… | ||
| Scan100 | Improvements to the riding qualities of the 40/50 and 20 HP cars. | ||
| View original record | X235 To Hs. from R. c. to BJ. LHS. c. to PN. Wor. c. to BY. CWB. RL/M9.7.27. RIDING QUALITIES. X. 8410 X. 235 X. 5410 X. 8420 X. 4565 X. 8840 For improved riding qualities of our cars - both 40/50 and… | ||
| Scan101 | Test report on the twist of the axle control, including a graph of deflection versus load. | ||
| View original record | To DA. from Hs/Rm. c. to BY. X235 Hs/Rm1/LG9.7.27. AXLE CONTROL. Twist of axle control. X8470 Graph: Y-axis: defln. thous. d. X-axis: lbs. load 'W'. With reference to DA2/M25.6.27. We have carried out… | ||
| Scan102 | Test memorandum detailing shock damper experiments on a 40/50 HP model. | ||
| View original record | To W.B. from Hs/Rn. H235 Hs/Rn2/LG12.7.27. 40/50 HP. SHOCK DAMPER TESTS. (1) To see if turbulent flow is less affected by temperature than streamline flow. 470 r.p.m. 4" stroke. Restrictions .098"… | ||
| Scan103 | Rigging a hydraulic damper in the steering system to achieve a specific load and torque. | ||
| View original record | To Hs. from DA. X235 DA4/M12.7.27. STEERING JOGGLES. X. 8430 X. 235 This is to remind you that R. would like you to rig up the hydraulic damper in the steering system, to give a load of 192 lbs. at… | ||
| Scan104 | Hand-drawn graph on blueprint paper comparing the viscosity of various oils against temperature and efflux time. | ||
| View original record | COMPARISON OF VISCOSITIES Y-Axis Label: TEMP °C. Y-Axis Values: 80, 70, 60, 50, 40, 30, 20, 10, 0 X-Axis Label: TIME OF EFFLUX, SECS. X-Axis Values: 0, 250, 500, 750, 1000, 1250, 1500, 1750, 2000… | ||
| Scan105 | Test load requirements for steering joggles and hydraulic dampers. | ||
| View original record | To D.A. from Hs/Rn. /235 Hs/Rm2/LG1 8.7.27. STEERING JOGGLES. x8430 With reference to DAA/HL 2.7.27. Could you please amplify the test you require. Previously we found the best load on the ball end of… | ||
| Scan106 | The lubrication of front shock damper connecting links after a 4000-mile test on an 8-EX car. | ||
| View original record | To BY. ) To DA. ) FROM Hs/GWH. X235 Hs. absent. Hs/GWH1/LG21.7.27. IMPROVED LUBRICATION OF FRONT SHOCK DAMPER CONNECTING LINKS TO SCH.F.76634. X235 X8520 Fitted to 8-EX car. We have examined the… | ||
| Scan107 | Alteration to front shock absorber loading and despatching a pair for testing on car 103-MC. | ||
| View original record | X235 To CWB. from Hs/Rm. Hs/Rm5/LGS. 8.27. X8950 With reference to CWB7/AMC23.7.27. We have recently altered the standard front shock absorber loading to 70 lbs. up and 80 lbs. down. As this is… | ||
| Scan108 | Report confirming that shock absorbers fitted with special springs have passed testing satisfactorily. | ||
| View original record | RM/As x235 By SPH do you want me to go ahead now authen Mx/McM7/T9.8.27. re Shock Absorbers. By 11-8-27 By2/H27.6.27. Sft/JMW7/EMM6.7.27. The shock absorbers fitted with special springs have all… | ||
| Scan109 | The performance of hydraulic front shock dampers after extended road testing. | ||
| View original record | S/W. Hs. X235 CWB1/GM/23-9-27. HYDRAULIC FRONT SHOCK DAMPERS. I have now had the opportunity of running 103-NC some 2,500 miles in France and Germany, fitted with the front hydraulic shock dampers… | ||
| Scan110 | One hydraulic damper piston be made according to an attached sketch. | ||
| View original record | To RiC. from Hs/Rn. X235. Hs/Rn1/LG26.9.27. Would you please let us have one hydraulic damper piston off to the attached sketch. Hs/Rn. | ||
| Scan111 | Hydraulic shock absorbers, customer feedback on 'pitching', and modifications to damping. | ||
| View original record | To CWB. from Hs/Rm. X235 Hs/Rm2/LG27.9.27. HYDRAULIC FRONT SHOCK ABSORBERS. 48410 With reference to CWB1/GM23.9.27. We suggest that any further xe tests you carry out on shock dampers should include… | ||
| Scan112 | Car suspension modifications for a customer, Sir John Latta, due to complaints of pitching. | ||
| View original record | Y235 To CWB. From Hs/Rn. HS/RHL/LG27.9.27. X8410 With reference to CWB10/GM23.9.27. We should be interested to know the conditions under which Sir John Latta for the most part uses his cars i.e. is he… | ||
| Scan113 | Further tests on shock dampers and the effect of damping on vehicle pitching. | ||
| View original record | S/W. Hs. X235 CWB6/GM/27-9-27. HYDRAULIC FRONT SHOCK ABSORBERS. Reference your Hs/Rm2/LG27.9.27 I also think it very desirable that any further tests on shock dampers should include hydraulic damper… | ||
| Scan114 | Clarifying the necessity of damping with hydraulic shock absorbers to prevent vehicle pitching. | ||
| View original record | To CWB. from Hs/Rn. X235 X8410 Hs/RmL/LG29.9.27. With reference to CWB6/GM27.9.27. My note was badly worded. Obviously to prevent pitching it is necessary to have damping. I meant to convey that a… | ||
| Scan115 | Request for the production of brackets to fit hydraulics and Hartford shock dampers to the rear of vehicle 44-PK. | ||
| View original record | X235 X4479 To RHC. from Hs/Rm. Hs/RM2/LG5.10.27. We wish to fit hydraulics and Hartford shock dampers to the rear of 44-PK. We should therefore be obliged if you will produce the necessary brackets.… | ||
| Scan116 | The performance of a four-point rigid suspension system, focusing on steering and engine vibrations. | ||
| View original record | X235 X634 / X84D Hs/Rm3/LG28.10.27. FOUR-POINT SUSPENSION & RIGID AT THE FRONT AND REAR. STEERING. We noticed a slight improvement in steering joggles with this suspension when the hydraulics were set… | ||
| Scan117 | Test report on the performance of rear springs and hydraulic dampers for the 14-EX car. | ||
| View original record | X235 Hs/Rm5/LG7.11.27. 14-EX CAR. X235 | ||
| Scan118 | The required loadings for front axle control dampers. | ||
| View original record | X235 ToxxBYXXXiXam To BY/HEB. from Hs/Rn. Hs/Rm3/LG11.11.27. X235 X.S420 We wish the loadings on the front axle control dampers to be the same as on the present front shock absorber i.e. 65/70 up and… | ||
| Scan119 | Suspension issues with springing, damping, and hitting buffers on the 10-EX car. | ||
| View original record | To DA. from Hs/Rm X 235 Hs/RmA/LG15.11.27. EAC.14. SPRINGING. X4426 [crossed out] X8410 With reference to DAL/M11.11.27. We observe that you do not want the coachbuilding clearances altered from… | ||
| Scan120 | Tests conducted on hydraulic shock dampers to improve car riding comfort and stability. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to EY. OY. N737 Hs/Rml/LG16.11.27. HYDRAULIC SHOCK DAMPERS. X235 X7410 We obtained some figures for the front axle velocity on the road when fitted… | ||
| Scan121 | Shock damper testing, their performance on models 12-EX and 14-EX, and comparison with standard dampers. | ||
| View original record | contd :- -2- cold on compressor oil we used Prices Motorine 'C'. Whilst carrying out these tests we found out, amongst other things, that the valves do not lift for very small and slow ball end… | ||
| Scan122 | Report concluding that the suspension on the 14-EX model performs as well as, or better than, the standard 40/50 HP. | ||
| View original record | contd :- -3- momentarily almost as high as when the whole car is moving through large amplitudes at the relatively slow spring periodicity. We think that with the semi elliptic springs on 14-EX we… | ||
| Scan123 | Report comparing the ride quality of the 14-EX car with higher pressure and standard shock dampers. | ||
| View original record | GWH1/LG16.11.27. RE. SPRINGING OF 14-EX CAR. The riding of this car fitted up with a higher velocity pressure factor on the rear shock dampers is at high speeds over rough and good roads very steady.… | ||
| Scan124 | Blueprint showing performance graphs and a cross-sectional diagram for a damper piston assembly. | ||
| View original record | FIG. A BALL PIN LOAD AT 7.5 RADIUS 100 200 300 400 PRESSURE ON PISTON LBS/SQ IN 200 400 600 800 1000 MEAN PISTON VEL. FAST TOURING MAX. WORKING PISTON VEL. PASSAGES AS BELOW STANDARD PASSAGES VALVE… | ||
| Scan125 | Four graphs analysing oil pressure, velocity, temperature, and viscosity for different oils and orifice configurations. | ||
| View original record | FIG. B GRAPH I OIL PRESS. LBS. □" AXLE VEL. 3 FT / SEC STROKE INS. 120 R.P.M. PRESS. L.P. VALVE OPENS COMPRESSOR OIL 20°C INCREASE IN VELOCITY PRESSURE FACTOR DUE TO VARIOUS SPACING OF ORIFICES. NOTE… | ||
| Scan126 | Requesting the fabrication of hydraulic shock dampers with specific orifices for various car models. | ||
| View original record | X235 To RHC. from Hs/Rn. Hs/Rn1/LG18.11.27. HYDRAULIC SHOCK DAMPERS. Will you please make up two complete sets of shock absorbers with orifices as indicated on the attached sketch, one for the 40/50… | ||
| Scan127 | Blueprint showing modifications to a hydraulic damper. | ||
| View original record | HYDRAULIC DAMPER MODIFICATIONS DIA OF PASSAGE IN CASE .172 1st Drill 11/64 DIA OF PASSAGES IN PISTON .098 2 PER PISTON DAMPERS OTHERWISE TO DRAWING | ||
| Scan128 | Request to fit a pair of hydraulic shock absorbers to the rear of a 9-G3 car. | ||
| View original record | RHC. from Hs/Rm. +235 Hs/Rm2/LG21.11.27. +235 45520 Will you please arrange to fit a pair of hydraulic shock absorbers to the rear of 9-G3 car with standard loadings and passages. Hs/Rm. | ||
| Scan129 | Specifying the recommended loads for the 20 HP rear shock absorber, questioning different figures on drawing F.54988. | ||
| View original record | 4235 To BY. from Hs/Rn. Hs/Rml/LG28.11.27. 15520 The loads which we are recommending for the 20 HP. shock absorber at the rear are :- Up 45 lbs. Down 55/60 lbs.. We note on drg. F.54988 that some very… | ||
| Scan130 | Suspension pitching issue on car 59-LF during the Paris Closed Phantom Trials and seeking a solution. | ||
| View original record | X235 S/W. To Hs. Copy to HK. Whr. OWB. PN7/EH.30.11.27. Paris Closed Phantom Trials - 59-LF. In further reference to the memo I dictated on this car when in Paris last week, I found, when running this… | ||
| Scan131 | Increasing the front shock absorber loading on the Phantom and checking chassis 59-LF. | ||
| View original record | X235 To PN. from Hs/An. c. to HK. Whr. c. to CWB. Hs/Rm5/LGL.12.27. X235 With reference to PN7/EH30.11.27. When we introduce the hydraulics on the rear of the Phantom, we increasethe front shock… | ||
| Scan132 | Springs and loads for a rear hydraulic damper on a 20-HP chassis. | ||
| View original record | Hs/Rm. 7235 BY/HEB12/M.1.12.27. 20-HP. CHASSIS. REAR HYDRAULIC DAMPER SEC: 7150. In reply to Hs/Rm1/LG28.11.27, kindly note we have had springs on order since August, in accordance with your… | ||
| Scan133 | Car tests, including a 20 HP car and a Stutz, and requesting feedback on Phantom hydraulics and Chrysler engine mountings. | ||
| View original record | To OY. from Hs/Rn. X235 Hs/Rnl/LG2.12.27. (Handwritten Notes: X5830 4336 - crossed out) In response to your personal appeal of the 15-th.ult. We have swung a 20 HP. car. The nett result was that we… | ||
| Scan134 | The adjustment of front shock absorber loading on two trial cars. | ||
| View original record | S/W. Hs/Rm. 4235 CWB15/GM/2.12.27. LOADING OF FRONT SHOCK ABSORBERS. Reference your Hs/Rm5/LG1.12.27. we have recently fitted rear Hydraulic shock absorbers to two of our trials cars, 16-NC and 65-EF,… | ||
| Scan135 | The shock absorber loadings for models 16-NC and 65-EF. | ||
| View original record | Mr. MacMillan T.D. from Hs/Rm. X235 Hs/Rm2/LG5.12.27. Could you please let me know by return what the shock absorber loadings on 16-NC and 65-EF are. You will recollect that the shock absorber… | ||
| Scan136 | Shock absorber loadings for models 16-NC and 65-EF, with a handwritten reply. | ||
| View original record | [Handwritten Initials Top Left]: Hs/Rm [Typed]: To Mr MacMillan T.D. From Hs/Rm. [Handwritten Top Center]: X235 [Typed Top Right]: Hs/Rm2/LG5.12.27. [Typed Body]: Could you please let me know by… | ||
| Scan137 | Recommending shock absorbers be sent to Derby for modification to alter the low-pressure side loads. | ||
| View original record | X235 To CWB. from Hs/Rm. Hs/Rml/LG6.12.27. KAS X235 X2950 With reference to CWB15/GM2.12.27. The loads which we require altering on these shock absorbers are the low pressure side which are… | ||
| Scan138 | Confirming an improvement in pitching after modifying the front hydraulic shock absorbers on chassis 59-LF. | ||
| View original record | From Ps to "HS/RM" Copy to "PN" X235 Ps2/II. 14.12.27 Chassis 59-LF Further to Ps/RM5/LGI.12.27, the modification of increasing the loading of the front hydraulic shock absorbers on above chassis has… | ||
| Scan139 | Modifications to hydraulic shock absorbers for chassis 59-LF. | ||
| View original record | "Hm" Works. Copy to "Hs" "LPS" "CWB" X235 PS7/IL.27.12.37 Chassis 59-LF When I was in London this week, PH, CWB and myself discussed the question of modifications to hydraulic shock absorbers. I… | ||
| Scan140 | Hydraulic shock damper performance, oil frothing tests, and new car models like the Sports Phantom. | ||
| View original record | To OY. from Hs/Rm. +235 Hs/Rml/LG13.1.28. HYDRAULIC SHOCK DAMPERS. +235 7877 Thank you for your personal note of Jan. 2nd. Are you sure that our shock absorbers do get ineffective after a few miles… | ||
| Scan141 | Typed letter extract recommending the purchase of a car, mentioning its advanced features. | ||
| View original record | contd :- -2- has come up. You ought to buy one of these cars. The RR. designed body-work is a big advance, likewise the turbulent head and rubber engine mounting. HS/Rn. | ||
| Scan142 | Car springing adjustments to address pitching issues and improve ride quality. | ||
| View original record | To Ps. from Hs/Rn. X235 Hs/Rn2/LG13.1.28. SPRINGING. X8410 We are very interested in your note re. pitching difficulties with French cars. We suggest that you may find increasing the damping on the… | ||
| Scan143 | Recommendation for experimental loading of front and rear hydraulic shock absorbers using packing pieces. | ||
| View original record | contd :- -2- By insertion of packing pieces under the springs of the hydraulic shock absorbers it is possible to obtain any loading to 140 lbs. on the front shock absorbers for an experimental test.… | ||
| Scan144 | Faulty near-side front hydraulic shock absorber on a Trials Phantom Saloon. | ||
| View original record | H.S X235 Copy to:- Sy. Hs. Hx. Er. PH15/GM/24.1.28. X8950 Re: 65-EF. Trials Phantom Saloon. This car has an urgent demonstration appointment at Bradford tomorrow morning and therefore was instructed… | ||
| Scan145 | Lord Curzon's feedback on a Phantom model, covering shock dampers, clutch, controls, and bodywork. | ||
| View original record | HS. EJ. DA/EV. c. to WCR. C. PN. c. to CWB. E. SG. X235 R2/M30.1.28. X.4117 XX6 X.235 X.7770 X.8774 X.3531 PHANTOM. RE. LORD CURZON. We should reply to Lord Curzon's very kind and interesting letter… | ||
| Scan146 | Vehicle performance characteristics, including speed, bodywork, and engine compression. | ||
| View original record | contd :- -2- other reasons. Then we fitted a much larger tank and concluded that for all ordinary running it was alright. We are now fitting a vacuum pump so as to be independent of induction pipe… | ||
| Scan147 | Experiments on hydraulic shock dampers, focusing on eliminating temperature effects and modifying pressure passages. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to DA. BY. c. to OY. X235 Hs/Rml/LG8.2.28. HYDRAULIC SHOCK DAMPERS. 14-EX is running with shock dampers having restrictions as indicated in our Hs/Rml/LG16.11.27.… | ||
| Scan148 | Continued discussion on pressure velocity, damper loading and an objection to dampers fitted on model 14-EX. | ||
| View original record | contd :- -2- only that if a considerable pressure velocity factor is contemplated the low pressure passage might with advantage be made more tortuous. Graph 11. shews that quite a large pressure… | ||
| Scan149 | Graph of Pressure vs. Piston Velocity with a diagram illustrating piston passage design. | ||
| View original record | GRAPH II MAX: PISTON VEL: % VARIATION NORMAL TEMPS: 6% % VARIATION EXCEPTIONAL TEMPS: 20% PRESSURE LBS/D'' AVERAGE VEL: Piston Vel: INS/SEC. AIR TEMP -10°C. +10°C NORMAL TEMP VARIATION +25°C +40°C.… | ||
| Scan150 | Graph plotting pressure versus piston velocity for a standard type of shock damper, showing temperature variation effects. | ||
| View original record | GRAPH I % VARIATION NORMAL TEMPS: 16% % VARIATION EXCEPTIONAL TEMPS: 45% PRESSURE LBS/□" PISTON VEL. INS/SEC. AVERAGE VEL. AIR TEMP. -10°C +10°C NORMAL TEMP. VARIATION +25°C +40°C. HP LP STANDARD TYPE… | ||
| Scan151 | Proposing to supply a heavier pair of front road springs for the 14-EX model to fix an issue with the front springs hitting the buffers. | ||
| View original record | To R. from Hs/Rm c. to E.J. X235 Hs/AmS/LG15. 2. 28. HYDRAULIC SHOCK ABSORBERS. X 8410 The front axle control dampers on 14-EX are not fitted with the velocity pressure increase. The rear shock… | ||
| Scan152 | Effectiveness and potential redesign of hydraulic dampers for Phantom and 20 HP models. | ||
| View original record | Hs. BY. DA. from R. c. to BJ. Wor. E. X235 R2/M19.2.28. --- PHANTOM AND 20 HP. X.235 HYDRAULIC DAMPERS. X.8520 X.5520 We are going to considerable cost to fit the above. Are you sure that what we are… | ||
| Scan153 | Replacement of Hartford's friction shock absorbers with hydraulic types like Lovejoy and Houdaille. | ||
| View original record | B/W.Eby copy Hs. for information 12355 Whr.12/LR/22. 2. 2. 28. Re: SHOCK ABSORBERS. Acting on instructions, I recently wrote R.R.A.I telling them that we were rather concerned at their suggestion to… | ||
| Scan154 | Standard and experimental hydraulic damper loadings for Phantom & 20 HP models. | ||
| View original record | To R. from Hs/An. c. to BJ. Wor. c. to E. Da. c. to BY. CY. X235 Hs/RnS/LG23.2.28. PHANTOM & 20 HP. - HYDRAULIC DAMPERS. With reference to R2/M19.2.28. Ever since the introduction of these dampers we… | ||
| Scan155 | Fault with a damper caused by foreign matter lodging on the valve seat. | ||
| View original record | contd :- -2- A trouble which we experience occasionally is for a minute piece of foreign matter to lodge on the valve seat and be forced into the alum. when the valve tries to close. This can put the… | ||
| Scan156 | Adjustments to hydraulic damper settings for the Phantom and 20 HP models. | ||
| View original record | Y/235 Hs/Rm. From R. RL/M28.2.28. c. to BJ. Wor. OY. BY. E. PHANTOM AND 20 HP. HYDRAULIC DAMPERS. X.235 X.S520 X.S520 From my experience, and what I hear, I am still of the opinion that we ought to… | ||
| Scan157 | Letter discussing findings from an investigation into knocking front shock absorbers. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. OY10.R.3.8.28 March 8th, 1928. Mr. Robotham, Rolls Royce Ltd., Derby, England. Dear Mr. Robotham: RE SHOCK ABSORBERS As the result of a lengthy… | ||
| Scan158 | Test report on modifying air vents and replenishing valves to prevent vacuum-pockets and shocks in an instrument. | ||
| View original record | OY10.R.3.8.28 - 2 - March 8th, 1928. (4) It appears desirable either to increase the size of the replenishing valves or reduce the diameter of the .024 air vent, in order to prevent the formation of… | ||
| Scan159 | Cure using .020 vent and larger replenishing valves, and referring the matter for further analysis. | ||
| View original record | OY10.R.3.8.28 - 3 - March 8th, 1928. (c) As a "cure" we would suggest that say .020 vent and larger replenishing valves will be found to give improved results. Since we have no adequate way of testing… | ||
| Scan160 | Schematic diagram of a shock absorber. | ||
| View original record | DRAWING NO. SK 197 SEE ALSO THE FOLLOWING OPERATION DRAWINGS AIR VENT 0 TO .050 DIA H.P. OIL L.P. OIL REPLENISHING OIL - (UNDER APPROX ATMOSPHERIC PRESSURE) SPRING-LOADED AIR VALVE. BLOWS AT 100… | ||
| Scan161 | Shock absorber noise, hole size adjustments, and proposed experiments. | ||
| View original record | X235 To OY. from Hs/Rn. Hs/Rm2/LG26.3.28. SHOCK ABSORBERS+ X832 With reference to your note of the 8th. You will recollect that we gave you all the information we had on noises from the shock absorber… | ||
| Scan162 | Shock absorber failures, oil viscosity tests, and performance theories. | ||
| View original record | contd :- -2- We do not think however that it can do any harm to increase the dimensions of the refilling passages and are therefore conducting some tests on these lines. We are completely mystified by… | ||
| Scan163 | Research, production challenges, and competitive analysis of hydraulic shock absorbers. | ||
| View original record | contd :- -3- I hope, if time permits, to get an indicator working on the hydraulic shock absorber to tell us exactly what it is doing. I read with interest the article by the Chrysler expert on Shock… | ||
| Scan164 | Test conducted on a damper, including a diagram of the test setup, to investigate oil replacement and air release. | ||
| View original record | contd :- -4- .250 BORE .250" We have just conducted a rough test to confirm that the oil can be replaced in the cyl. more rapidly than it can be lost through the air release. Placing a cork and glass… | ||
| Scan165 | Hand-drawn blueprint graph comparing the viscosity of various oils against temperature. | ||
| View original record | COMPARISON OF VISCOSITIES FOR VARIOUS OILS. TEMPERATURE - °C 80 70 60 50 40 30 20 10 0 TIME OF EFFLUX - SECS: 0 250 500 750 1000 1250 1500 1750 2000 Curve Labels: CASTROL R. MOTORINE C. MOBILOIL B.… | ||
| Scan166 | Tests on staggering orifices in hydraulic dampers for the Phantom and 20 HP models. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to DA. RG. c. to E. BY. c. to OY. X235 Hs/Rml/LG30.3.28. PHANTOM AND 20 HP. HYDRAULIC DAMPERS. X.235 X.5520 X.8520 With reference to R2/M9.2.28. We have conducted… | ||
| Scan167 | Shock absorber performance with staggered orifices using various oil viscosities and temperatures. | ||
| View original record | contd :- -2- could be made still larger if more of them were employed, but we can see no advantage as they are far too large to get blocked up. The following table (obtained with Prices Motorine 'C',… | ||
| Scan168 | Shock absorber and suspension design principles. | ||
| View original record | contd :- -3- velocity of 14 ins/sec. because this is equivalent to a rise of 400 lbs/sq.in. at a piston velocity of 10 ins/sec. which is about the max. we can use without spoiling our low speed… | ||
| Scan169 | Shock absorber performance, specifically addressing issues with rubber buffers and proposing future improvements. | ||
| View original record | contd :- -4- (4) That if we have no velocity pressure increase, an 80 lbs. ball end load from the shock absorber is as much as we can use without spoiling the low speed ride. (5) That it is erroneous… | ||
| Scan170 | Suspension damper performance, with graphs comparing the current system to an ideal one for different driving conditions. | ||
| View original record | contd :- -5- which operates only at large amplitudes, and preferably more on the bump than the rebound. This means that we can damp at high speeds without spoiling the low speed riding. What we have… | ||
| Scan171 | Obtaining exact records of shock absorber loadings and internal pressures. | ||
| View original record | contd :- -6- characteristic with the minimum of complication. In order to obtain an exact record of shock absorber loadings that give us good riding, and also to assist us in any further… | ||
| Scan172 | Graph showing the measured rating of rubber buffers for the 40/50 rear axle. | ||
| View original record | MEASURED RATING OF RUBBER BUFFERS 40/50 REAR AXLE LOAD - LBS : 0, 200, 400, 600, 800, 1000, 1200 DEFLECTION - INCHES : 0, .1, .2, .3, .4, .5, .6 CONTINENTAL RUBBER 1.000" DEEP STANDARD RUBBER 1.500"… | ||
| Scan173 | Graph plotting the rating of a road spring and buffer, showing load versus deflection. | ||
| View original record | RATING OF ROAD SPRING + BUFFER LOAD LBS DEFLN INS 1600 1400 1200 1000 800 600 400 200 0 1 2 3 4 5 MORE DESIRABLE MEANS OF BRINGING THE AXLE TO REST 1800 LBS REAR SPRING RATING 150LBS/1" AT WORKING END… | ||
| Scan174 | Performance graph for a hydraulic damper, showing oil pressure versus piston velocity under various temperature conditions. | ||
| View original record | HYDRAULIC DAMPER HIGH PRESSURE PASSAGE COMPRESSOR OIL STAGGERED ORIFICES NORMAL TEMP 0-40°C % VARIATION 1% EXCEPTIONAL TEMPS -10 - +50°C % VARIATION 6% -10°C 0°C 50°C OIL PRESS LBS/□" PISTON VEL… | ||
| Scan175 | Graph comparing the viscosities of various oils against temperature. | ||
| View original record | COMPARISON OF VISCOSITIES FOR VARIOUS OILS. TEMPERATURE — °C 0 10 20 30 40 50 60 70 80 TIME OF EFFLUX — SECS: 200 500 700 1000 1250 1500 1750 2000 LARD OIL WAKEFIELDS COMPRESSOR OIL MOBILOIL B SHELL… | ||
| Scan176 | Series of hydraulic shock damper tests with various configurations and resulting pressure readings. | ||
| View original record | HYDRAULIC SHOCK DAMPER TESTS. SPEED 200 R.P.M. STROKE 6" LOW PRESSURE LOAD 55 LB. HIGH PRESSURE LOAD 60 LB. COMPRESSOR OIL EQUIVALENT PISTON VELOCITY 14"/SEC LOW PRESSURE:- ONLY ONE RELIEF PASSAGE IN… | ||
| Scan177 | Blueprint detailing hydraulic shock damper tests with various restriction configurations. | ||
| View original record | HYDRAULIC SHOCK DAMPER TESTS HIGH PRESSURE:- EQUIVALENT PISTON VELOCITY 14"/SEC PORT IN CYLINDER OPENED OUT TO .500" DIA. 2.500" DEEP RESTRICTION 'A' .201" DIA .500" DIA RESTRICTION 'B' .201" DIA… | ||
| Scan178 | The use of Lovejoy oil for hydraulic shock absorbers to address harsh riding in cold weather. | ||
| View original record | X235 To OY. from Hs/Rn. Hs/Rn2/EG31.3.28. HYDRAULIC SHOCK ABSORBERS. X235 X544 (crossed out) If you are really getting harsh riding in zero weather, we suggest that you use Lovejoy oil. The only… | ||
| Scan179 | Letter requesting a copy of findings from experimental work on shock absorbers. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X235 S/W HS BJ Na3B6428 April 6th,1928. Mr.Basil Johnson, ROLLS-ROYCE LTD. 14-15 Conduit St. London W-1, ENGLAND. Att. Mr. E.W.Hives Dear Sir, Just… | ||
| Scan180 | Issues and potential improvements for hydraulic shock absorbers. | ||
| View original record | Y235 Hs [crossed out] from Mx. Mx7/T12.4.28. re Shock Absorbers. We have now had considerable experience with the Hydraulic Shock Absorber, both on test, and also a number of cases where shock… | ||
| Scan181 | Letter discussing the use of Truffault shock absorbers on sports cars to address front wheel wabble. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Handwritten notes: X235, HS, BJ Na5B41228 April 12th, 1928. Mr. Basil Johnson, ROLLS-ROYCE LTD., 14-15 Conduit St. London W-1, ENGLAND. Att. Mr. E.W.… | ||
| Scan182 | Letter from Rolls-Royce of America requesting confirmation on the loading figures for rear shock absorbers. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. .Hs X235 NalB41328 April 13th, 1928. Mr. Basil Johnson ROLLS-ROYCE LTD., 14-15 Conduit St. London W-1, ENGLAND. Att. Mr. E.W.Hives C to Mr. R.W.Bailey… | ||
| Scan183 | Causes of oil shortage in hydraulic shock absorbers and the correct filling procedures. | ||
| View original record | To Mx. from AS/Rm. c. to EX. √235 Hs/Rml/LG14.4.28. HYDRAULIC SHOCK DAMPERS. √235 78520 With reference to Mx7/T12.4.28. We do not consider that the trouble of shortage of oil should be experienced on… | ||
| Scan184 | Troubleshooting methods for shock absorbers and air release systems. | ||
| View original record | contd :- -2- and we will see if we cannot immediately alleviate the trouble by filling the shock absorber correctly. "Naturally, if the shock absorber is incorrectly filled, larger replacing passages… | ||
| Scan185 | The investigation into knocks on hydraulic shock absorbers, identifying three causes and their cures. | ||
| View original record | 4235 To Na. from Hs/Rn. c. to BJ. c. to BY. Hs/Rm2/LG27.4.28. X235 Y6570 RE. KNOCKS ON HYDRAULIC SHOCK ABSORBERS. With reference to Na3/B6428. We sent a full report - ref. Hs/Rm2/LG23.4.27 and… | ||
| Scan186 | Fitting of additional Hartford shock absorbers on sports cars for high-speed performance. | ||
| View original record | X235 To Na. from Hs/Rm. c. to BJ. c. to EY. Hs/RmS/LG27.4.28. SHOCK ABSORBERS ON SPORTS CARS. (X762 X235 Y4426) With reference to NaS/B41228. With reference to the fitting of plain friction shock… | ||
| Scan187 | Loading specifications for rear shock absorbers and comparing them to American standards. | ||
| View original record | X235 To Ns. From Hs/Rm. c. to BJ. c. to BY. Hs/Rm5/LG27.4.28. LOADING OF REAR SHOCK ABSORBERS. With reference to Nal/B41323. The standard loadings which we are now using and which we find satisfactory… | ||
| Scan188 | Proposal to modify car 98-NK for steering and shock absorber tests, and to overhaul its engine unit. | ||
| View original record | To H.C. from HS/Rn. L235 HS/Rn2/LG3.5.28. 98-NK CAR. +8430 We propose to use this car for steering tests with the castor pivots. We therefore would like the Marles steering removing and replacing by a… | ||
| Scan189 | Sketches and parts for modifying an indicator for hydraulic work on shock absorbers. | ||
| View original record | To RIC. from Hs/Rn. X205 Hs/Rn4/LG3.5.28. Herewith sketches of modification to indicator to enable it to be used for hydraulic work on the shock absorbers. We are handing you bits of the indicator so… | ||
| Scan190 | Letter from the American branch to the UK branch regarding hydraulic shock absorbers. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X235 S/W Hs B3/52428 May 24th, 1928. BJ-1 Mr. Basil Johnson, ROLLS-ROYCE LTD., 14-15 Conduit St. London W-1 ENGLAND. Att. Mr. Hives RE: KNOCKS ON… | ||
| Scan191 | Letter from the American branch to the London branch regarding the loading of rear shock absorbers. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X235 S/W Hs B2/52428 May 24th, 1928. Mr. Basil Johnson, ROLLS-ROYCE LTD., 14-15 Conduit St. London W-1, ENGLAND. Att. Mr. Hives Re: Loading of Rear… | ||
| Scan192 | Request for the methodology and a sketch of the apparatus used for testing hydraulic shock absorbers. | ||
| View original record | K2005 Hs/Rm. From Na. Na4/W25.5.28. Re SHOCK ABSORBER TESTS. I shall be glad if you will kindly give me a description of your method of arriving at the efficiency of the hydraulic shock absorbers. I… | ||
| Scan193 | Advising to wait before giving out shock absorber test results due to a revision of methods. | ||
| View original record | No. from Hs/Rm. X235 Hs/Rm1/LG6.6.28. SHOCK ABSORBER TESTS. With reference to Na4/W25.5.28. As we are revising all our methods of obtaining shock absorber figures, at the moment we think it would be… | ||
| Scan194 | Request to make parts for a hydraulic shock absorber efficiency measuring device and a reminder about a chassis. | ||
| View original record | To RHC. from Hs/Rm. 4235 Hs/Rm1/LG8.6.28. Y3806 Herewith sketch of device for measuring hydraulic shock absorber efficiency. Will you please make the necessary parts. We should also like to remind you… | ||
| Scan195 | Informational leaflet detailing the features and fitting cost of a new hydraulic shock damper. | ||
| View original record | X235 THE NEW ROLLS-ROYCE HYDRAULIC SHOCK DAMPER in this diagram, among them a means of replenishing both sides of the piston from the reservoir “R”; a means of ejecting any air which may get behind… | ||
| Scan196 | Article reprint detailing the new hydraulic shock damper and other model updates. | ||
| View original record | THE NEW ROLLS-ROYCE HYDRAULIC SHOCK DAMPER Reprinted from the MOTOR OWNER of July, 1927 IN accordance with their long-established policy of persistent research, followed by searching tests and… | ||
| Scan197 | Various damping solutions to address steering problems, including a spring-damped pendulum and hydraulic arrangements. | ||
| View original record | Hs. from T. c. to BJ. BY. X235 RL/M15.6.28. RE. PROBLEM OF STEERING. X.7430 X.7850 ---------- X.8430 X.235 We have now sent you a spring damped pendulum lever with laminated springs. This is arranged… | ||
| Scan198 | The modification of an old Crosby steam engine indicator to measure hydraulic shock absorber pressures and analyse test diagrams. | ||
| View original record | To R. from Hs/Rm. c. to B.J. Wor. c. to E. DA. c. to OY. BY. X235 Hs/Rm2/LG1 8. 6. 28. HYDRAULIC SHOCK ABSORBERS. Y443 We have modified an old Crosby steam engine indicator to make it useful for… | ||
| Scan199 | Summary of findings from damper tests, comparing working pressures and proposing modifications to the standard damper piston. | ||
| View original record | contd :- -2- through the straight passages. Summarising the information that we have gained from these diagrams: (1) That the working pressure on the low pressure stroke is only about 50% of that of… | ||
| Scan200 | Report page discussing vehicle suspension issues like high-speed wobbles and the efficiency of shock absorbers. | ||
| View original record | -3- contd :- the low speed valve, the low speed loading ceases to exist which is undesirable if the car is relying on the dampers to prevent high speed wobbles. It has occurred in our tests. A… | ||
| Scan201 | Chart comparing the characteristics of Viscosity Loading and Standard Rear Hydraulic Shock Dampers. | ||
| View original record | ROLLS-ROYCE REAR HYDRAULIC SHOCK DAMPER CHARACTERISTICS. First Column: Stroke in ins. at end of 13.5" lever. Section: VISCOSITY LOADING DAMPER. Columns: M.E.P., Max:press:, Low press: Readings as % of… | ||
| Scan202 | Blueprint detailing alterations to a pressure velocity damper. | ||
| View original record | ALTERATIONS TO PRESSURE VELOCITY DAMPER LOW PRESSURE RESTRICTION THREE RESTRICTIONS - 'd' = .125" 'D' = .750" ONE PASSAGE COMPLETELY BLOCKED UP. HIGH PRESSURE RESTRICTION 'C' .218 DIA .500 .150 EIGHT… | ||
| Scan203 | Performance graphs for a rear damper with staggered passage at various stroke lengths. | ||
| View original record | 11" STROKE Graph 1 (High Pressure): M.E.P. 635 LBS/[] SLOW RUNNING Graph 2 (Low Pressure): M.E.P. 535 SLOW RUNNING Center label: REBOUND BUMP 7" STROKE Graph 1 (High Press): M.E.P. 430 LBS/[] Graph 2… | ||
| Scan204 | Comparison of standard and velocity pressure dampers showing mean and maximum effective pressures at varying strokes. | ||
| View original record | COMPARISON OF STANDARD DAMPER AND VELOCITY PRESSURE DAMPER WITH STAGGERED ORIFICES. MAX. AND MEAN EFF PRS COMPARED VARYING STROKE. Left Graph: 200 CYCLES / MIN MEAN EFFECTIVE PRESSURES CONSTANT SPEED… | ||
| Scan205 | Performance graphs for a Standard 40/50 rear hydraulic shock absorber at different stroke lengths. | ||
| View original record | 11" STROKE HIGH PRESSURE LOW PRESSURE EFFECTIVE PRESS PROVIDING DAMPING LBS/SQ IN M.E.P. H.P. 425 L.P. 180 7" STROKE HIGH PRESSURE LOW PRESSURE RESULTANT EFFECTIVE PRESS LBS/SQ IN M.E.P. H.P. 366 L.P.… | ||
| Scan206 | Potential causes and test methods for trapped air within a hydraulic shock damper. | ||
| View original record | Hs. from DA. X. 235 DAL/M22.6.28. HYDRAULIC SHOCK DAMPER. With reference to Hs/Rm2/LG1 8.6.28., Mr. Royce suggests that the phenomenon of the pressure remaining on the high pressure side during the… | ||
| Scan207 | Shock absorber valve testing and modifications for improved riding conditions. | ||
| View original record | [Handwritten in red ink] W- Hives N235 This may be of interest to you OYL.B.6.25.28 TO: [Strikethrough] Mr. Bagnall [/Strikethrough] [Strikethrough] Mr. Poole [/Strikethrough] FROM: [Strikethrough]… | ||
| Scan208 | Instructions on the correct procedure for filling hydraulic shock absorbers with oil. | ||
| View original record | X235 To Hm. from Hs/Rm. Hs/Rm4/LG25.6.28. HYDRAULIC SHOCK ABSORBERS. X835 With reference to ST2/LH23.6.28. The job of filling the damper is facilitated if the high pressure valve is removed when the… | ||
| Scan209 | Tests conducted to determine the effect of temperature rise on hydraulic dampers. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to OY. Y235 Hs/Rm4/LG26.6.28 HYDRAULIC SHOCK ABSORBERS. X. 235. X.1588 Y4443 We have conducted tests to determine the effect of temperature rise on the… | ||
| Scan210 | Performance tests of a hydraulic damper, focusing on staggered orifices, oil frothing, and temperature effects. | ||
| View original record | contd :- -2- is negligible under all circumstances. The indicator therefore confirms our impressions that the action of the RR. hydraulic damper is very consistent under all conditions unless some… | ||
| Scan211 | Summary of tests on a damper, comparing the performance of staggered and plain narrow bore passages. | ||
| View original record | contd :- -3- A third series of tests were carried out with a standard damper, the only alteration to which was a reduction in the bore of the high and low pressure passages. We cannot explain why the… | ||
| Scan212 | Blueprint showing two graphs comparing standard damper performance under high and low pressure, with variations in temperature. | ||
| View original record | STANDARD DAMPER. VARIATION WITH TEMP. FIG: I. LBS/O" 600 400 200 PRICES C 15°C 20°C 60°C HIGH PRESSURE. 64/80 LB. LOADS 13" LEVER SLOW 200 CYCLES/MIN: 11" STROKE OF BALL. FIG. II LBS/O" 600 400 200… | ||
| Scan213 | Series of graphs and diagrams showing the variation in staggered orifices occasioned by temperature. | ||
| View original record | STAGGERED ORIFICES. VARIATION OCCASIONED BY TEMPERATURE. Graph 1 (Top Left): LBS/SQ" 800, 600, 400, 200 22°C 61°C HIGH PRESSURE 55/60 LBS LOADS STAGGERED H.P. PASSAGES .218 DIA 13" LEVER 200… | ||
| Scan214 | Series of graphs illustrating performance variations with oil temperature under different load, stroke, and port configurations. | ||
| View original record | PLAIN REDUCED DIA RESTRICTIONS. VARIATION WITH OIL TE Top Left Graph: L.P. 55/60 LB. LOADS 13" LEVER H.P. PORT .187" DIA. L.P. .098" DIA. 200 R.P.M. 11" STROKE. Y-axis: 1" = 332 LB/sq" Data points:… | ||
| Scan215 | Investigation into a phenomenon observed in hydraulic shock dampers. | ||
| View original record | To DA. from Hs/Rm. X235 Hs/Rm1/LG26. 6. 28. HYDRAULIC SHOCK DAMPERS. With reference to DA1/M22.6.28. We do not think the phenomenon you mention is due to trapped air because it vanishes as soon as we… | ||
| Scan216 | Continued tests of hydraulic dampers, focusing on pressure phenomena and oil expansion. | ||
| View original record | To R. from Hs/Rm. c.c. to B.J. Wor. c.c. to R. DA. c.c. to BY. OY. X235 HYDRAULIC DAMPERS. We have continued our tests on the RR. hydraulic dampers. In order to make the conditions of investigation… | ||
| Scan217 | Analysis of oil pressure dynamics within a damper system, focusing on high and low pressure strokes. | ||
| View original record | contd :- -2- Now on the high pressure stroke, the pressure at low velocities as in the present series of tests almost entirely due to valve spring pressure and so built up almost entirely in the… | ||
| Scan218 | Damper performance tests, focusing on vent configurations, oil temperature effects, and pressure phenomena. | ||
| View original record | contd :- -3- is very clearly shewn in the four diagrams attached ranging from oil temps. of 19°C and 60°C (figs. 1 and 4.) If we enlarge the vent we expect the bump to go; it does but with loss of… | ||
| Scan219 | The results of tests on dampers and shock absorbers, including observations on air vents and indicator diagrams. | ||
| View original record | Contd :- -4- and also ascertained that the air vent is quite clear and that there is no leakage past the replenishing valves so that we think they are more representative than the original standard… | ||
| Scan220 | Series of graphs showing temperature effects and air vent modifications on a high-pressure damper. | ||
| View original record | SHEET I HP 80 LP 60 13" LEVER 200 CYCLES / MIN [Left Column] Graph FIG I: 19°C, Slow Running, 42°C Graph FIG II: 54°C Graph FIG III: 61°C Graph FIG IV STANDARD DAMPER. AIR VENT .015" TEMP EFFECTS ON… | ||
| Scan221 | Graphical comparison of high and low pressure sides for a standard damper. | ||
| View original record | SHEET II STANDARD DAMPER .015 AIR VENT 60/80 LOADS 200 CYCLES / MIN. OIL 20°C 200 LBS / □ SLOW RUNNING HIGH PRESSURE 200 LBS / □ SLOW RUNNING LOW PRESSURE COMPARISON OF HIGH AND LOW PRESSURE SIDES… | ||
| Scan222 | Indicator diagrams for a standard damper under specific load and temperature conditions for various HP and L.P. strokes. | ||
| View original record | SHEET 3 STANDARD DAMPER .024 VENT 20°C OIL TEMP. 60/80 LOAD 200 CYCLES/MIN 200 LBS/D" H.P. 2" STROKE SLOW RUNNING 200 LBS/D- L.P. 2" STROKE SLOW RUNNING 330 LBS/D" H.P 6" STROKE SLOW RUNNING 330… | ||
| Scan223 | From Mr. Royce requesting further tests and experiments on hydraulic shock dampers. | ||
| View original record | Hs. from DA. X.235 DA3/M28.6.28. HYDRAULIC SHOCK DAMPERS. Further to our DAL/M22.6.28., Mr. Royce would like an additional test made by providing a leak also for the high pressure side. With reference… | ||
| Scan224 | Shock absorbers and spring setups for various models and road conditions. | ||
| View original record | X235 To CWB. From Hs/Rn. Hs/RmL/LG9.7.28. | ||
| Scan225 | Difficulty of removing front dampers on vehicle 29-CL due to torque control modification, and arranging to send parts. | ||
| View original record | To CWB. from Hs/Rn. X235 Hs/Rm4/LG9. 7. 28. +8950 With reference to the dampers on 29-CL. Have you realised the difficulty of removing the front dampers now that torque control has been adopted? We… | ||
| Scan226 | Request to obtain and modify a set of front and rear hydraulic shock absorbers for chassis 29-CL. | ||
| View original record | To RHC. from Hs/Rm. X235 Hs/Rm5/LG9.7.28. HYDRAULIC SHOCK ABSORBERS. X235 X8950 Will you please obtain a set of front and rear dampers as at present being fitted to F.2.B. series and modify the… | ||
| Scan227 | Difficulty of changing front shock absorbers on car 29-CL and arranging assistance for the changeover. | ||
| View original record | S/W (Hs/Rm) X235 CWB17/LH11.7.28. Thank you for your Hs/Rm4/LG9.7.28. I had realised that there might be some difficulty in changing the front shock absorbers, but until I looked at 29-CL this… | ||
| Scan228 | Questioning discrepancies found in diagrams for hydraulic shock dampers. | ||
| View original record | Hs. from DA. X.235 DAL/M13.7.28. HYDRAULIC SHOCK DAMPERS. With reference to Hs/En2/LG9.7.28., it may be that we do not properly understand the diagrams, but there appears to us to be some… | ||
| Scan229 | Alternative designs for the 'SS' rear shock damper, comparing two schemes and outlining modifications. | ||
| View original record | BY. from DA. c. to BJ. Hs. +235 DA1/M1 4.7.28. 'SS' REAR SHOCK DAMPER. X.7520 X.235 Herewith we send N.schs. 2651/2 shewing alternative arrangements of the rear shock damper on 'SS'. Mr. Royce would… | ||
| Scan230 | Confirming the completion and dispatch of hydraulic shock absorbers for chassis 29-CL. | ||
| View original record | To CWB. from Hs/Rn. +235 Hs/Rm4/LG14.7.28. HYDRAULIC SHOCK ABSORBERS FOR 29-CL. +8950 These shock absorbers will be finished on Monday evening. We shall send them by passenger train to Conduit St.… | ||
| Scan231 | The despatch of experimental hydraulic dampers and side steering tube springs. | ||
| View original record | X235 X8950 T8450 To CWB. from Hs/Rm. Hs/Rm3/LG16.7.28. We have despatched the hydraulic dampers and with them 3 sets of side steering tube springs of - 2000, 2500, and 3000 lbs/1" rating. They are… | ||
| Scan232 | Points related to the function of hydraulic shock dampers. | ||
| View original record | To DA. from Hs/Rm. X235 Hs/Rm1/LG16.7.28. HYDRAULIC SHOCK DAMPERS. With reference to DA1/M13.7.28. We agree that there are features that we have not so far explained but we do not think that the… | ||
| Scan233 | Responding to queries on hydraulic shock absorbers, detailing test results and future testing plans. | ||
| View original record | To OY! from Hs/Rm! c! to Na. X235 Hs/Rm/LG17.7.28. HYDRAULIC SHOCK ABSORBERS. X832 Replying to OY2/R6.28.28 - taking your queries in order :- (1) You will see from our further report that back… | ||
| Scan234 | Vehicle ride quality, tyre performance, and suspension adjustments. | ||
| View original record | contd :- -2- (8) We do not believe that you will be able to use tyres on the front at 35 lbs/sq.in. without danger of 'shimmy' or 'tramp' unless you make the front of the car ride harshly by… | ||
| Scan235 | Indicator diagram tests of American shock absorbers with modified leaks. | ||
| View original record | To R: from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to BY. OY. X235 Hs/Rml/LG18.7.28. AMERICAN SHOCK ABSORBERS. 1832 We have taken indicator diagrams of the American shock absorbers. We used a high… | ||
| Scan236 | Riding comfort versus car control, referencing American conditions and a proposed test of a slotted type suspension. | ||
| View original record | contd :- -2- the problem of riding comfort versus car control. All our information so far has indicated that the American conditions of riding do not necessitate such a firm suspension as ours. We… | ||
| Scan237 | Comparison of Standard and American rear shock absorbers using high pressure diagrams. | ||
| View original record | COMPARISON OF STANDARD AND AMERICAN REAR SHOCK ABSORBERS. 200 LBS/□' H.P. 3.7" STROKE. A 330 LBS/□' H.P. 11" STROKE. A 200 LBS/□' H.P. 7" STROKE. A SLOW RUNNING APPROX 40 CYCLES. PER MIN. HIGH… | ||
| Scan238 | Series of performance graphs for a standard damper at various stroke lengths and pressures. | ||
| View original record | 13" LEVER STANDARD DAMPER .024 VENT 20°C OIL TEMP 60/80 LOAD 200 CYCLES / MIN. SLOW RUNNING 40 CYCLES / MIN APPROX. 200 LBS / D" H.P 3.7" STROKE A 200 LBS / D" L.P. 3.7" STROKE A SLOW RUNNING 330 LBS… | ||
| Scan239 | Letter discussing characteristic car movements and vibrations related to shock absorbers. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. 8235. OY3.R.7.13.28 July 13th, 1928. Mr. Robotham, Rolls Royce Ltd., West Wittering, England. Dear Mr. Robotham: RE SHOCK ABSORBERS - SECTION 7150/60… | ||
| Scan240 | Technical discussion on shock absorber valve performance, leakage, and design modifications. | ||
| View original record | - 2 - 70 cycles/min. 4" max. allowable stroke (almost entirely at the rear.) All these characteristic movements blend together when car is on road, and because the car is not K² = ab pure bouncing or… | ||
| Scan241 | Report page detailing shock absorber settings, recommended valves, and poundage testing procedures. | ||
| View original record | - 3 - They can be inserted and removed in about 10 minutes per pair of instruments, which is practically nearly as quick as adjusting the needle valve on a Houdaille. (3) SETTINGS Front 80 up 100 down… | ||
| Scan242 | The testing and comparison of different shock absorber systems, including adjustable needle valve and Houdaille types. | ||
| View original record | - 4 - We have adopted this practice through finding that instruments set by ball load become impossibly "easy" after a few thousand miles, and that after this distance the mechanical friction of the… | ||
| Scan243 | Data tables for front, rear shock absorbers, and axle control specifications. | ||
| View original record | FRONT SHOCK ABSORBERS 7-1/2" ARM 1.750 INT. LEVER H.P. Valve: Area = .0764 in^2 LOAD ON BAL | OIL PR. TO OPEN VALVE | VALVE-SPRING LOAD 20# | 36 | 2.75 40 | 71 | 5.50 60 | 107 | 8.25 80 | 143 | 11.0… | ||
| Scan244 | Drawing of an adjusting needle assembly. | ||
| View original record | DRAWING NO. A-12116. SEE ALSO THE FOLLOWING OPERATION DRAWINGS A-12113. A-12114. A-12115. A-10244. MAY 18 1928 DRAWN BY TRACED BY CHECKED BY APPROVED BY LIMITS ROLLS-ROYCE OF AMERICA, INC. MODEL 40-50… | ||
| Scan245 | Blueprint for a slotted high pressure valve for a hydraulic shock absorber. | ||
| View original record | DRAWING NO. A12217 SEE ALSO THE FOLLOWING OPERATION DRAWINGS 9329 A PART VIEW OF OIL GROOVE SCALE 10/1 SQUARE CORNER .015 CHAMFER AT 45° .100 +.10 .025 -.10 .025 R ±.10 .106 1.050 ±.10 .925 -.25 45°… | ||
| Scan246 | Blueprint for leaking high pressure valves with associated part numbers. | ||
| View original record | 9387 A. PART VIEW OF OIL GROOVE. SCALE 10/1. SQUARE CORNER. TWO SLOTS. .015 CHAMFER AT 45°. TABLE: VALVE P, WIDTH OF SLOTS 'W' .031, PART NUMBER AI2180. VALVE Q, WIDTH OF SLOTS 'W' .047, PART NUMBER… | ||
| Scan247 | Blueprint for a high pressure valve for a hydraulic shock absorber. | ||
| View original record | DRAWING NO. A-12292-3-4-5 SEE ALSO THE FOLLOWING OPERATION DRAWINGS TABLE: No., POSITION OF HOLE A-12292, PLAIN, NO HOLE A-12293, A, .450 A-12294, B, .650 A-12295, C, .850 DIMENSIONS & ANNOTATIONS:… | ||
| Scan248 | Riding qualities, specifically tyres and road springs, for the Phantom and 20 HP models. | ||
| View original record | Hs. EP. from R. c. to BJ. BY. PN. CWB. +235 R2/M20.7.28. PHANTOM AND 20 HP. X.7410 X.7820 RIDING QUALITIES. X.3410 X.5820 X.5410 X.235 TYRES. Naturally we must have low pressure tyres for both these… | ||
| Scan249 | Improvements to vehicle suspension, focusing on flexible springs and hydraulic shock dampers. | ||
| View original record | contd :- -2- depart from flexible springing for the sake of high speed riding, but since we have got hydraulic dampers we must increase the effectiveness of these dampers, especially on the recoil… | ||
| Scan250 | Requesting a report on improvements to riding qualities by investigating tyres, springs, and dampers. | ||
| View original record | Hs. CWB. from R. c. to BJ. Wor. BY. 4235 R1/M23.7.28. RIDING QUALITIES. X.4565 X.1360 X.5820 X.235 X.5410 I hope to receive shortly a report shewing improvements due to :- (1) 6" low pressure tyres on… | ||
| Scan251 | Tests on high and low pressure end diagrams for hydraulic shock absorbers. | ||
| View original record | X235 To DA. from Hs/Rm. Hs/Rm3/LG24. 7. 28 HYDRAULIC SHOCK ABSORBERS. X235 We have carried out a great many tests to try and explain the difference between the high and low pressure end diagrams upon… | ||
| Scan252 | Agreeing to halt further investigation into hydraulic shock damper pressure diagrams as the damper is working satisfactorily. | ||
| View original record | Hs. from DA. X. 235 DA3/M26.7.28. HYDRAULIC SHOCK DAMPERS. Replying to Hs/Rn3/LG24.7.28., we agree that at the moment it is undesirable to spend more time on investigating the phenomenon of the… | ||
| Scan253 | Specifications for front and rear damper springs to increase high-pressure loading. | ||
| View original record | To CWB. } From Hs/Rm: To PN! } X235 Hs/Rml/LG27.7.28. X8950 Herewith springs to increase the high pressure loading on the dampers and make it double that of the low pressure loading. Those for the… | ||
| Scan254 | Letter discussing hydraulic dampers and the trial of new springs for car 29-CL. | ||
| View original record | S/W (Rm) Copy to WH. X235 OWB.4/WT2.8.28. HYDRAULIC DAMPERS AND 29-CL. -------------------- Thank you for your note of the 30th; as however you did not leave me any address I cannot reply to you… | ||
| Scan255 | Low-speed riding trouble, shock absorber loading, and damper testing. | ||
| View original record | +235 To PN. from Hs/Rm. Hs/Rm4/LG20.8.28. SPRINGING. +8410 With reference to PN1/WT17.8.28 1/2 Your impressions confirm our results. We find that on the whole the low speed riding trouble is… | ||
| Scan256 | Request to modify a 20 HP gearbox for use in a shock absorber test rig. | ||
| View original record | To RHC. from Hs/Rm. x235 Hs/Rml/LG3.9.28. x5310 We wish to use a 20 HP. gearbox fitted directly to the Royce motor in order to drive a shock absorber test rig. The direct drive shaft to the gearbox… | ||
| Scan257 | Confirming the receipt of two steam engine indicators and the intent to adapt them for a shock absorber rig. | ||
| View original record | To PN. from Hs/Rm. X235 H4468 Hs/Rm5/LG4. 9.28. We have received the 2 steam engine indicators. They are quite a different type to the one we have been using but we are seeing if we can adapt them to… | ||
| Scan258 | Discrepancy observed in 40/50 suspension test results. | ||
| View original record | Hs. from DA. 7235 DAL/M10.9.28. 40/50 SUSPENSION. X. 8410 X. 235 X. 8520 With reference to Hs/Rml/LG6.9.28., there seems something of a discrepancy between the result of test No.1. and test No.5. On… | ||
| Scan259 | Request to clean, polish and grease the rear springs and disconnect the hydraulic shock absorbers on car 98-NK. | ||
| View original record | To RHC. from Hs/Rm. X235 Hs/Rm2/LG27.9.28. 78410 98-NK CAR. Will you please arrange for the rear springs of this car to be cleaned, polished and greased during the night, and the hydraulic shock… | ||
| Scan260 | Technical memorandum on strengthening 'H' section levers for the Phantom chassis hydraulic and axle control dampers. | ||
| View original record | c. Hs/Rm. X235 BY/HEBY/M.27.9.28. PHANTOM CHASSIS. FRONT AND REAR HYDRAULICS SEC:7150/60. U.W. FRONT AXLE CONTROL SEC:7160. Kindly receive herewith one Blue Print of:- F.79481 Intermediate… | ||
| Scan261 | Suggestion to modify the front hydraulic shock absorber mounting to prevent fouling the front wings. | ||
| View original record | S/W. Hs. Copy to:- EP. By. X235 CWB9/GM/4.10.28. It has been suggested that there would not be so much chance of the arms of the front hydraulic shock absorber fouling the front wings, nor would there… | ||
| Scan262 | Practicality of changing the position of the front hydraulic shock absorbers. | ||
| View original record | X235 W/S CWB c. Hs. c. BY. EP2/H9.10.28. re. POSITION OF FRONT HYDRAULIC SHOCK ABSORBERS. With reference to your CWB9/GM/4.10.28. I do not think the changing of the position of these shock absorbers… | ||
| Scan263 | Requesting the drawing for modified levers on the axle control hydraulic dampers. | ||
| View original record | To BY. from Hs/Rm. X235 Y7+20 Hs/Rm9/LG17.10.28. With reference to the levers which we are modifying on the axle control hydraulic dampers. We are anxious to try the modified type when you can let us… | ||
| Scan264 | Requesting the casting for a rear shock absorber testing rig. | ||
| View original record | To RHC. from Hs/Rn. Y235 Hs/Rm3/LG30.10.28. With reference to the casting for rear the shock absorber testing rig. A number of experiments have accumulated on shock absorbers and we should therefore… | ||
| Scan265 | Noisy hydraulic shock absorbers on a 20 HP Weymann trials car and a 20 HP Barkerlite Saloon. | ||
| View original record | X235 S/W....from PN. Copy to Hs. [Redacted Names] PN.5/WT31.10.28. HYDRAULIC SHOCK ABSORBERS. Recently the shock absorbers on the rear of our 20 H.P. Weymann trials car became noisy, and N. found it… | ||
| Scan266 | Complaints and potential adjustments for hydraulic rear shock absorbers on 20 HP and 40/50 models. | ||
| View original record | To Hm. from Hs/Rn. c. to BY. Wor. c. to MX. X235 Hs/an5/LG31.10.28. REAR SHOCK ABSORBERS. X235 X5520 One of the complaints that have been made about the hydraulic shock absorbers is that they cannot… | ||
| Scan267 | Investigating noise issues on the 20 HP hydraulic shock absorbers. | ||
| View original record | To PN: from Hs/Rn. c. to EP. Hbn. c. to CWB. X235 Hs/Rn2/LG2.11.28. HYDRAULIC SHOCK ABSORBERS. X5520 With reference to the noise on the 20 HP. shock absorbers. As these are identical in principle to… | ||
| Scan268 | Complaints of knocking rear shock absorbers on the 20 HP model and a proposed solution. | ||
| View original record | To BY. from Hs/Rn. c. to DA. c. to Wor. c. to Hm. c. to Mr. Brock. X235 Hs/RmB/LG5.11.28. SHOCK ABSORBERS. X5520 X235 We have had complaints from Sales that the 20 HP. rear shock absorbers knock on… | ||
| Scan269 | The difficulty in detecting shock absorber noise and a recommendation for the 20 HP rear damper. | ||
| View original record | contd :- -2- the problem is particularly difficult because the volume of sound from a shock absorber varies so with the type of body to which it is fitted, thus The Test Dept. cannot always detect a… | ||
| Scan270 | Booking-out slip for two rear shock absorbers fitted to vehicle 10-G-3. | ||
| View original record | To RHC. from Hs/Rm. X235 +7520 Hs/Rm8/LG6. 11. 28. The two rear shock absorbers to be fitted to 10-G-3 were from production. Will you please arrange to let them have the necessary booking-out slip.… | ||
| Scan271 | Customer complaints of knocks from rear hydraulic shock absorbers on 20HP models. | ||
| View original record | Wor. from Hm. C. to Hs/Rm. C. to DY. C. to MX. X235 X5510 Hm12/W12.11.28. Re 20HP. Rear Shock Absorbers. Reference: Hs/Rm3/LG9.11.28. I am bringing this to your notice because the position of this… | ||
| Scan272 | Tests to determine the effectiveness of shock absorber positioning on the Phantom model to prevent high-speed wobbles. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to DA. OY. c. to BY. X235 Hs/Rn1/LG13.11.28. HIGH SPEED WOBBLES. X.457 X.235 X.8430 We carried out tests on the Phantom to determine if shock absorbers applying… | ||
| Scan273 | Diagram showing the positioning of shock dampers to mitigate high-speed wobble. | ||
| View original record | [ "ROLLS-ROYCE, LIMITED", "PRINT ROOM,", "12 NOV 1928", "DERBY.", "16·0"", "23·5"", "HIGH SPEED WOBBLE AND SHOCK DAMPER POSITION." ], | ||
| Scan274 | Improvements to vehicle suspension for comfortable riding and reducing vibrations. | ||
| View original record | Hs. BY. from R. c. to BJ. Wor. c. to PN. CWB. c. to C. SG. c. to HM. EP. X235 R2/M19.11.28. COMFORTABLE RIDING. X.507 X.5005 X.235 X.7005 I feel sure that the best we can do, until we can alter the… | ||
| Scan275 | List of further tests to investigate shock damper knocks. | ||
| View original record | W. Bell. from Hs/Rn. x235 21.11.28. +8520 FURTHER TESTS ON SHOCK DAMPER KNOCKS. (1) Hold a damper to the frame as on the 40/50 rear and see if the same type of knock is audible. (2) Repeat test with a… | ||
| Scan276 | Customer complaint about noisy shock absorbers on chassis GBH-21. | ||
| View original record | To Hm. from Hs/Rn. c. to EWT. XZ35 Hs/RnL/LG27.11.28. CHASSIS GBH-21. F.H. BLACKMORE ESQ. BRISTOL. + 4118 With reference to Hm/WW11/W26.11.28. We should like the opportunity of dealing with this… | ||
| Scan277 | Test procedure document for troubleshooting and improving F. Blackmores shock absorbers. | ||
| View original record | X235 TESTS ON F. BLACKMORES SHOCK ABSORBERS. X4118 (A). (1) Ascertain that the balls in the ball valves of the present owners shock absorbers are free and if necessary counter-sink their seats… | ||
| Scan278 | Typed memorandum discussing the potential replacement of dampers and valves to cure a noise issue on a car. | ||
| View original record | -2- We expect that the new production dampers will be better than those he has at present on this car, but we are not certain. It may be that you will be able to leave the car with the new dampers and… | ||
| Scan279 | Audible knocks in 20 HP shock absorbers caused by a faulty non-return ball valve. | ||
| View original record | To Hm/WW. from Hs/Rm. Hs/Rm1/LG3.12.28. Handwritten: X235, X4118 KNOCK IN 20 HP. SHOCK ABSORBERS. With reference to Hm/WW9/W3.12.28. The only way we know of dealing with this complaint at the moment… | ||
| Scan280 | Letter to a customer regarding an experimental mechanic being sent to investigate and cure a noisy shock absorber issue. | ||
| View original record | c. to Hm. /235 HS/Rm3/LG. Expl: Dept: 3rd. Dec. 1928. /4148 F.H.Blackmore Esq., Grand Spa Hotel, Bristol. Dear Sir, The bearer of this note is one of our Experimental Dept. mechanics. We would ask you… | ||
| Scan281 | Confirming an engineer has been sent to deal with Mr. Blackmore's car and to experiment on it. | ||
| View original record | To Hm. from Hs/Rn. X235 Hs/Rnl/LG4.12.28. X4118 This is to confirm that we have sent one of our men down to deal with Mr. Blackmore's car. As you will see from our letter to him, we have asked that… | ||
| Scan282 | Knocking shock absorbers on the 20 HP car caused by a faulty non-return replenishing valve. | ||
| View original record | To DA. from Hs/Rn. c. to Wor. BY. c. to Hm. MX. [Handwritten] X235 [Handwritten] Hs/Rm5/LG4.12.28. KDM KNOCKING SHOCK ABSORBERS. [Handwritten] X5520 X8520 X235 Whilst investigating noisy shock… | ||
| Scan283 | Complaints of noisy hydraulics, accompanied by a blueprint of a sticking shock-damper ball valve. | ||
| View original record | contd :- -2- complaints of noisy hydraulics. We should like the point to be watched on production and test. Hs/Bn. [Text on blueprint] STICKING SHOCK-DAMPER BALL VALVE | ||
| Scan284 | Strengthened 'I' section lever design for the 'SS' front shock damper. | ||
| View original record | BY. Hs. from DA. X235 DA1/M7.12.28 'SS' FRONT SHOCK DAMPER. X.7520 X.235 With reference to the fracture on the bumping rig report in Hs/Rml/LG5.12.28., we send herewith N.sch.2775 shewing a… | ||
| Scan285 | Requesting the production of pieces for shock absorbers according to attached drawings. | ||
| View original record | RHC/FW. from Hs/Rm. X235. Hs/Rm4/LG12. 12. 28. SHOCK ABSORBERS. Will you please arrange for the pieces to be made to the attached drawings. Hs/Rm. | ||
| Scan286 | The weights of front shock dampers with different top half casings. | ||
| View original record | 4235 S.S. FRONT SHOCK DAMPERS. N. Sch 2635. Wt COMPLETE WITH LEVER. AL/BZ TOP HALF CASING 17 3/4 LB. Wt COMPLETE WITH LEVER. A/C TOP HALF CASING 13 1/8 LB. FULL OIL SUPPLY IN DAMPERS. | ||
| Scan287 | Fitting new standard production shock absorbers to chassis GEM.21 for Mr. F.H. Blackmore. | ||
| View original record | W/S. 4235 CD. from Hs/Rn. c. to L/AWS. Hs/Rm6/LG3.1.29. Chassis No.GEM.21 F.H.Blackmore. Y4117 With reference to CD2/GM2.1.29. Our man visited Mr. Blackmore at Bristol and was able to cure his trouble… | ||
| Scan288 | Dispatch of broken shock absorber parts. | ||
| View original record | X235 To DA. from Hs/Rm. Hs/Rm4/LG10.1.29. X8772 With reference to DA2/M8.1.29. We are sending you the broken shock absorber parts in bulk. Hs/Rm. | ||
| Scan289 | The despatch of a box of scrap broken shock absorbers to a Mr. Day. | ||
| View original record | X235 To BP. from Hs/Rn. c. to Mt. Stores. Hs4/LG10.1.29. We are sending into the Stores for despatch to Mr. Day, Camacha, West Wittering :- 1 box of assorted pieces of broken shock absorbers. These… | ||
| Scan290 | Scheme for a friction-held cross member to address 'SS' frame front jellying. | ||
| View original record | BY. from DA. c. to BJ. Hs. 47005 Da4/MMO.1.29. 'SS' FRONT JELLYING. K. 7380 K. 7005 Herewith we send N.Sch.2793 - a rough scheme of a suggested position for a friction held cross member in the SS.… | ||
| Scan291 | The running of the 'SS' bumper chassis on the bumping rig, specifically regarding spring life with shock dampers. | ||
| View original record | To DA. From Hs/Rn. c. to BY. c. to Wor. 4235 Hs/RmL/LG11.1.29. 'SS' BUMPER CHASSIS. 48772 47410 Attached herewith is a complete report on the running of the SS. chassis on the bumping rig. You will… | ||
| Scan292 | Analysis of failures during a 200-hour 'SS' chassis test on a bumping rig. | ||
| View original record | 'SS' CHASSIS ON BUMPING RIG. Below we give an analysis of the failures during 200 hrs. running of this test. The front and rear ends were bumped for 100 hrs. each. Drum r.p.m. 105. Owing to the amount… | ||
| Scan293 | Operational life and failure points of various levers, shafts, and casings under test conditions. | ||
| View original record | contd :- -2- INSIDE LEVERS. Several of these broke - their lives were :- With 8 restrictions : N.S. F.79313. 6 hrs. 30 mins. 1 hr. 15 mins. O.S. F.79314. 6 hrs. 30 mins. 1 hr. 15 mins. With 5… | ||
| Scan294 | Testing and failure points of rear shock absorbers during a 100-hour trial. | ||
| View original record | contd :- -3- REAR SHOCK ABSORBERS. These were fitted when the rear of the car had already done 57 hrs. 45 mins. on the drums. Conditions : Tyres at 60 lbs/sq.in. Spare wheel carrier with 2 wheels.… | ||
| Scan295 | Test log detailing the life, running conditions, and failure analysis of vehicle springs. | ||
| View original record | Piece No. | Spring No. | Life. Hrs. Mins. | Running conditions. e.g. Dampers. | Where broken. | Brinell of broken part. F.78797 | 1 | 22 20 | Dampers for first 7½ hrs. only. | Top leaf, 3¼" from rear… | ||
| Scan296 | Alternative schemes for the 'SS' engine suspension, including a rubber-lined proposal. | ||
| View original record | X.7005 E4/M7.1.29. R. from E. c. to BJ. Wor. Hs. 'SS' ENGINE SUSPENSION. We are expecting any moment to hear from Hs. as regards the results obtained with SS. engine mounted on rigid front feet and… | ||
| Scan297 | Customer complaints and investigations into noisy hydraulic shock dampers on 20 HP cars. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to Sg. DA. c. to E. BY. c. to Mx. OY. c. to Hm. 4235 Hs/Rml/LG19.1.29. HYDRAULIC SHOCK DAMPER NOISES. The Repair Dept. have had various complaints from customers of… | ||
| Scan298 | Analysis of gudgeon pin wear, fitment issues, and associated knocking sounds, including a diagram of the pin. | ||
| View original record | contd :- -2- gudgeon pin, the least wear is sufficient to cause the trouble. The links are not very easy to make. The pin is ground a perfect fit in the eye, but when the ends of the pin are pressed… | ||
| Scan299 | Investigation into 'link' and 'bearing' knocks, discussing clearances, valve types, and diagnostic challenges. | ||
| View original record | contd :- -3- this is .014 - .018. We find we can run with only .003 side clearance without seizure of the links. When we reduced the side play, the noise from the links was less emphatic but still… | ||
| Scan300 | Technical memorandum discussing solutions for noise issues confined to the rear of the 20 HP model. | ||
| View original record | contd :- -4- number of complaints. Practically speaking, the trouble is mainly confined to the rear of the 20 HP. on certain cars which act as good 'sound boxes'. These cars have been rather… | ||
| Scan301 | Investigation and rectification of noises on Mr. Pilling's car, particularly concerning shock absorbers. | ||
| View original record | To Hm. from Hs/Rm. c. to Da. c. to Wor. X235 [Handwritten, crossed out] Hs/Rm2/LG22.1.29. X235 [Handwritten] X4118 [Handwritten] MR. PILLING. We have now returned to you Mr.Pilling's car. This car has… | ||
| Scan302 | Design of car and aero engine mountings. | ||
| View original record | E. RG. from R. Hs. BY. x7005 R1/M23.1.29. c. to BJ. Wor. Sg. c. to PN. CWB. c. to MTI Claremont. 'SS' - CAR ENGINE MOUNTING - (AND PERHAPS X.7005 AERO ENGINE DITTO). X.7380 Probably we have settled… | ||
| Scan303 | Sending prints for 'SS' engine mounting components. | ||
| View original record | X.7005 BY. from E. c. to BJ. Hs. E1/M26.1.29. 'SS' ENGINE MOUNTING X.7005 We send you herewith prints of LeCs. 2649/50 shewing respectively strip rubber rear engine arms, and strip rubber front engine… | ||
| Scan304 | Design and challenges of the 'SS' engine mounting feet. | ||
| View original record | X. 7005 R. from E. E6/M28.1.29. c. to BJ. Hs. BY. 'SS' ENGINE MOUNTING. We send herewith blueprint of LeC.2650 shewing the front engine feet for the above. Most of the remarks made in connection with… | ||
| Scan305 | Design of the 'SS' model's rear engine mountings and feet. | ||
| View original record | R. from E. c. to BJ. Hs. BY. X7005 E5/M28.1.29. 'SS' ENGINE MOUNTING. X.7005 X.7380 We send you herewith print of LeC.2649 shewing the rear engine feet for the above. These feet are mounted on rubbers… | ||
| Scan306 | Knocking issue in 20 HP hydraulic shock absorbers and suggesting a potential solution. | ||
| View original record | S/W for Hs. Copies to: Da. C. PN. X235 CWB7/GCD30.1.29. KNOCK IN HYDRAULIC 20 H.P. SHOCK ABSORBERS. As I understand the position with regard to this matter it is as follows:- We have discovered that… | ||
| Scan307 | Reducing the side clearance in shock absorber links to address noise issues. | ||
| View original record | To EY. from Hs/Rn. X235 Hs/Rn4/LGS1.1.29. c. to Wor. Hm. c. to Mk. Ha. SHOCK ABSORBER LINKS. X5520 We think, having regard to the trouble experienced with noisy shock absorbers, that the side… | ||
| Scan308 | Diagram of a hydraulic shock damper, noting a specific side clearance. | ||
| View original record | HYDRAULIC SHOCK DAMPER A SIDE CLEARANCE .005+3 | ||
| Scan309 | Investigations into knocking noises from 20 HP shock absorbers. | ||
| View original record | 1235 To CWB. from Hs/Rm. c. to DA. c. to C. c. to PN. Hs/Rm5/LG31.1.29. KNOCKING IN 20 HP. SHOCK ABSORBERS. Y235 / Y5520 With reference to CWB7/GCD30.1.29. The original line our investigations took… | ||
| Scan310 | 'SS' engine mounting, focusing on damper placement, rubber thickness, and frame stiffness. | ||
| View original record | E. DA. Hs. BY. } FROM R. c. to Sg. C.x to WOr. 'SS' ENGINE MOUNTING. X.7005 X.235 X.7380 We seem limited because of the front hydraulic dampers. I suppose they cannot possibly be outside the frame… | ||
| Scan311 | Broken shock absorber shaft being sent for despatch and examination. | ||
| View original record | To BP. from Hs/Rm. X235 c. to Mt. Stores. Hs/Rm3/LGl.2.29. We are sending into the Stores for despatch to Mr. Day, Camacha, West Wittering :- One broken shock absorber shaft. This is being sent to WW.… | ||
| Scan312 | Design improvements for hydraulic shock dampers, including a patentable idea for spring-loaded connecting links. | ||
| View original record | Hs. DA. from R. BY. c. to Sg. Wor. 4235 R4/M15.2.29. X.235 X.7520 HYDRAULIC SHOCK DAMPERS. I agree to high pressure valve drilled with a 1/16th. hole if thought advisable from tests, but not the… | ||
| Scan313 | Letter to Mr. E. W. Hives requesting feedback on rubber engine mounting and cast-dash designs. | ||
| View original record | X7005 OY12- February 15th, 1929. Mr. E. W. Hives, Rolls Royce Ltd., Derby, England. cc - Mr. Bailey Mr. A.F. Sidgreaves Dear Mr. Hives: RE RUBBER ENGINE MOUNTING - SECTION 7000 CAST-DASH - SECTION… | ||
| Scan314 | Letter regarding the fitting of cloth and felt silencing sheets to dashboards. | ||
| View original record | - 2 - We have recently started fitting cloth and felt silencing sheets to dashboards to increase silence, decrease heat, and avoid the rather "staring" effect of the bright aluminum sheet as seen by… | ||
| Scan315 | Shock absorber noises, detailing discrepancies between drawings and shop practice and proposing solutions. | ||
| View original record | X235 OY4- February 23rd, 1929. TO: Mr. Poole Mr. Burton Mr. Ainsworth Mr. Allen cc - Mr. Robotham/London File cc - Mr. Beaver Mr. Soutter Mr. Southern Mr. Humpston Mr. Caswell Mr. Ingham Mr. Wilkinson… | ||
| Scan316 | Technical memorandum discussing issues with shock absorbers, body noise, connecting tubes, and damper oil. | ||
| View original record | - 2 - (5) Note Rm's. suggestion to use links in "nitro-steel." I am asking him whether he does not refer to "Nitralloy" pins. I think we have no experience of wear in the pins or the side faces of the… | ||
| Scan317 | Unsatisfactory performance of shock absorbers in warm weather and comparing them to American Houdaille. | ||
| View original record | - 2 - Will Mr. Allen ask the Vacuum Company what results have been obtained? In warm weather there is still a very noticeable decrease in damping action and an increased tendency to clatter. Until we… | ||
| Scan318 | Telegram regarding engine feet rubber testing with different ferrules or rubber hardness. | ||
| View original record | MURRER COMPRESSEDSBY CT + 8 C IHW 0805 24 LAVANDOU 20 ROYCAR DERBY ANGLETERRE = HIVES ENGINE FEET TEST RUBBER MURRER MORE COMPRESSEDSBY USEING SHORTER FERRULES OR HARDER RUBBER FEAR THIN RUBBER + | ||
| Scan319 | Test results and required improvements for the 21-EX experimental car before sending it to France. | ||
| View original record | To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. 47005 Hs1/LG27.2.29. 21-EX CAR. X7005 X7941a The above car is the next car we are proposing to send to France. It is running on the road, but there… | ||
| Scan320 | Noise, engine mounting and booming issues, with plans to test the 21-EX car in France. | ||
| View original record | contd :- -2- when running at all speeds including small throttle openings which does not exist on the present Phantoms. Previously all this noise has been attributed to exhaust noise, and we are still… | ||
| Scan321 | Listing parts to be fitted to the 21-EX car chassis before testing. | ||
| View original record | COPY. To HPS. from RHC. c. to FW. JHC. c. to TJ. WY. RIC2/BE20.2.29. 21-EX CAR. We give below the parts which we expect will be fitted to the chassis before it is placed on test. We also shew a list… | ||
| Scan322 | Continued list of component modifications and improvements. | ||
| View original record | contd :- -2- 19. Air vessel on front axle pivots. 20. Increased capacity of vacuum pump LeC.2631. 21. Improved Dynamos Drive. LeC.2631. 22. Steering column and controls. 23. Improved Bijur oil pump.… | ||
| Scan323 | Work order detailing modifications to the engine feet and dampers for a 22-EX car. | ||
| View original record | X7005 To RHC. from Hs/Rm. Hs/Rm2/LG5.3.29. 22-EX CAR. A663 Will you please carry out the following work :- (1) Solid aluminium blocks in place of rubber in front engine feet - Phantom type. (2) Rear… | ||
| Scan324 | Phantom Trials car for comparison testing related to frame issues. | ||
| View original record | To CWB. from Hs. c. to Sg. X7005 Hs4/LG6.3.29. X7005 8005 We telephoned you this afternoon suggesting that you send to Derby for a few days a Phantom Trials car fitted with a covered body. We have… | ||
| Scan325 | Technical memo discussing the design and performance of rubber engine mountings. | ||
| View original record | X7005 OY. from Hs/Rm. Hs/Rm2/LG7.3.29. RE. RUBBER ENGINE MOUNTING. With reference to your OY12/15.2.29. (1) The engine weight may cause the side channels of the frame to deflect slightly due to the… | ||
| Scan326 | Frame stiffness resonance and the pros and cons of using a cast dash. | ||
| View original record | contd :- -2- frame stiffness. We have found out that in certain circumstances, to stiffen the frame torsionally is suicidal as it brings the frame period into the region of the front axle criss-cross… | ||
| Scan327 | Modifications to 20 HP rear shock absorbers to address knocking issues. | ||
| View original record | To BY. from Hs/Rn. X235 c. to Wor. Sg. c. to DA. E. c. to OY. Hn.✓ c. to Mx.✓ Hs/Rn3/L.G.11.3.29. 20 HP. REAR SHOCK ABSORBERS. X5520. Further to our Hs/Rn/L.G.11.1.29. where we asked for a reduction… | ||
| Scan328 | Telegram from Hives reporting that rear hydraulics were useless due to holes in valves, but the springing is now satisfactory on both cars after correction. | ||
| View original record | POST OFFICE TELEGRAPHS. No. 9243 Office Stamp: DERBY 23 MAR 29 B or C Charges to pay: 5/0 M From... Prefix. Time handed in. Office of Origin and Service Instructions. Words. 262 CL DFN 16.5 23 HYERES… | ||
| Scan329 | Technical memo discussing problems and design preferences for hydraulic dampers. | ||
| View original record | Hs/Rm. DA/Hdy. FROM R. BY. c. to SG. Wor. OY. c. to C. CWB. PN. E. c. to Mr. Claremont. R3/M25.3.29. HYDRAULIC DAMPERS. X.235 SS. AND OTHERS. X.7420 ---------- As telegraphed, my impression is that… | ||
| Scan330 | Rear hydraulic suspension issues on 'SS' model cars, specifically regarding drilled high-pressure valves. | ||
| View original record | To BY: from Hs/Rn. c.c. to Wor: Da. c.c. to E. X235 Hs/Rm5/LG26.3.29. REAR HYDRAULICS ON 'SS'. X7520 With reference to the telegram from Hs. in which he stated that the first SS. cars should not have… | ||
| Scan331 | To hold modifications on 20 HP rear shock absorbers pending test results from a 10,000 miles test. | ||
| View original record | To BY. from Hs/Rm. c. to DA. Sg. c. to OY. Wor. c. to Hm. X235 Hs/Rml/LG28.3.29. X5520 20 HP. REAR SHOCK ABSORBERS. Reports from France indicate that the drilled high pressure valves on the S.S. car… | ||
| Scan332 | Issues with drilled high-pressure valves on 20 HP rear shock absorbers. | ||
| View original record | To BY. from Hs/Rm. +235 Hs/Rm1/LG28.3.29. 20 HP. REAR SHOCK ABSORBERS. ✓15520 Reports from France indicate that the drilled high pressure valves on the 'SS' rear dampers spoilt the riding of the cars… | ||
| Scan333 | Letter to Mr. Hancock suggesting drilling a hole in the high-pressure valve of 20 HP rear shock absorbers to reduce knocks. | ||
| View original record | 4255 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. England. Hs/Rn2/LG28.3.29. Hotel de France, Chateauroux, Indre, France. Mr. Hancock from Hs/Rn. X5520 17-G-4. We are contemplating drilling a hole in… | ||
| Scan334 | Clarifying a misunderstanding regarding a high pressure test, stating it was for the 20 HP car, not the S.S. | ||
| View original record | X235 ExpL: Dept: Messrs Rolls-Royce Ltd., Derby. 3rd. April 1929. Hotel de France, Chateauroux, Indre, France. X 5520 Mr. Hancock from Hs/Rn. With reference to your reports re. drilling the high… | ||
| Scan335 | Confirming the drilling of high pressure valves for the SS rear hydraulic dampers. | ||
| View original record | X235 DA. c. Wer. c. S. c. Hs. ---------------- BY/Cgh7/G.3.4.29. DAT/M28.3.29. We wish to point out that the high pressure valves for the SS. rear hydraulic dampers were drilled in accordance with… | ||
| Scan336 | The design principles of shock dampers, covering leaks, valves, springs, and effective vibration control. | ||
| View original record | Hs. DA. BY. OY. from R. c. to AG. Wor. c. to Mr. Claremont. X235 RL/M4. 4. 29. SHOCK DAMPERS. X.235 X.5520 X.7520 X.7420 X.7830 X.5420 I have definitely condemned two things : (1) The leak past the… | ||
| Scan337 | Handling issues with a 20 HP vehicle, specifically regarding dampers, springs, and a heavy Hooper body. | ||
| View original record | contd :- -2- and after tax us. Weshall throw away our advantages, and be beaten, if we make mistakes and do nothing to cure them quickly. At the moment we are finding out if we can make the 20 HP.… | ||
| Scan338 | Modifications to the low and high pressure valves on 18-EX hydraulic dampers. | ||
| View original record | X255 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. 6th. April 1929. Restaurant Octobon, Le Canadel, Par le Lavandou, Var, France. Mr. Dodd from Hs/Rn. X7520 HYDRAULIC DAMPERS 18-EX. Rear Hydraulics -… | ||
| Scan339 | Instructions for altering valve loading and replacing washers on front hydraulic dampers and valves. | ||
| View original record | contd :- -2- O.S. .080" N.S. .081" Will you please replace them with the attached washers - O.S. .020" N.S. .020" The high pressure valve caps are not very accessible and so we send you a special… | ||
| Scan340 | Instructions for modifying springs and dampers, including inserting packing pieces. | ||
| View original record | contd :- -3- to pack up the springs under the valve cap. We send you two packing pieces to be inserted at X (see sketch). N.S. .068. O.S. .080. The dynamic restrictions should be removed from these… | ||
| Scan341 | The effect of drilling holes in high-pressure valves for hydraulic dampers and testing different pressure loadings. | ||
| View original record | x235 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. Angleterre. Hs/Rm2/LG8.4.29. x7941 Hotel de France, Chateauroux, Indre, France. Mr. Hancock from Hs/Rm. HYDRAULIC DAMPERS. We were very interested in… | ||
| Scan342 | Instructions for altering damper loading using specified washers to improve low and high-speed ride. | ||
| View original record | contd :- -2- Therefore we favour them because we believe they give a better low speed ride and at the same time give increased damping for high speed work. We attach a sketch shewing the location of… | ||
| Scan343 | Damper arrangements, steering shocks, and a report on a petrol gauge. | ||
| View original record | contd :- -3- upward and downward loads are about equal. We should like you to get an impression of the present and altered damper arrangements in the rear seat as well as in the front. We anticipate… | ||
| Scan344 | Design issue where a conduit obstructs access to the high-pressure valve on the 'SS' model's rear hydraulic shock absorbers. | ||
| View original record | To BY. from Hs/Rn. X235 Hs/Rnl/LG9.4.29. 'SS' REAR HYDRAULICS. X7520 There is a danger that the conduit may pass directly over the high pressure valve on the rear shock absorbers. When this happens it… | ||
| Scan345 | Special spanner for removing a high-pressure valve cap on the rear dampers. | ||
| View original record | Mr. Dodd from Hs/Rn. X235 Hs/Rn3/LG9.4.29. 48992 We are sending you a special spanner to enable you to remove the high pressure valve cap on the rear dampers, as this is rather inaccessible. We are… | ||
| Scan346 | Letter discussing riding quality, the effect of drilled valves, and shock absorber settings. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X235 OY2 April 11th, 1929. Mr. Robotham, Rolls Royce Ltd., Derby, England. Dear Mr. Robotham: Re RIDING QUALITY Thank you for your note HsRm1.LG28.3.29… | ||
| Scan347 | Shock absorber valve settings and their effect on vehicle ride quality. | ||
| View original record | - 2 - The alternatives are seldom used even in service. I think the rear poundage could just as well be made 120 lb. up and down, but we have not proved this yet. The L.P. valve is set by blow off… | ||
| Scan348 | Letter discussing pressure-velocity instruments, shock absorber design, and road spring lubrication methods. | ||
| View original record | - 2 - With regard to your remarks on"pressure-velocity" instruments do you not think that the whole fault with these is that you have reproduced the Houdaille trouble of a resistance which can go up… | ||
| Scan349 | Graph plotting leakage rates for various shock absorber valve designs and part numbers. | ||
| View original record | CU. INS/SEC. F 74570 SOLID. SHOCK ABSORBER VALVE LEAKAGE. CU. INS./SEC. AT 18 3/4 LB/SQ.IN. A12292 DRILLED 2 FLATS A12295 DRILLED 2 FLATS CROSS HOLE .850 FROM HEAD. A12294 DRILLED 2 FLATS CROSS HOLE… | ||
| Scan350 | Blueprint for a high pressure valve for a hydraulic shock absorber. | ||
| View original record | DRAWING NO. A-12292-3-4-5 SEE ALSO THE FOLLOWING OPERATION DRAWINGS No. POSITION OF HOLE A-12292 PLAIN NO HOLE A-12293 A .450 A-12294 B .650 A-12295 C .850 PART VIEW OF OIL FLATS. SCALE 10/1 .462 DIA… | ||
| Scan351 | Drawing for a slotted high pressure valve for a hydraulic shock absorber. | ||
| View original record | 9387 A DRAWING NO. A-12306 SEE ALSO THE FOLLOWING OPERATION DRAWINGS .015 CHAMFER AT 45° .100 +10 -10 1.050 +10 -10 .025 +10 -10 .925 +25 -25 .161 DIA 45° .025 R +10 -10 .050R 60° .075 DIA +10 -10 V… | ||
| Scan352 | Design and manufacturing tolerances for 'SS' rear hydraulic dampers to allow for load adjustment. | ||
| View original record | Y235 To BY. To DA. }} From Hs/Rm. c. to Wor. Hs/Rm3/LG12. 4. 29. 'SS' HYDRAULIC DAMPERS. REAR : Provision for load adjustment. +7520 We have now built up a number of sets of these dampers. As in the… | ||
| Scan353 | Specifications and recommendations for high and low pressure valve caps and damper springs. | ||
| View original record | contd :- -2- valves. In order to obviate the necessity for using washers thicker than .150 under the valve cap, we recommend that the distance F. on the low pressure valve cap should be .130 less than… | ||
| Scan354 | Specifications for front damper springs, valve caps, and loads. | ||
| View original record | contd :- -2- FRONT DAMPERS. As R. is suggesting that the low pressure load should be half that of the high pressure valve, we consider that it will be necessary to have two different depths of valve… | ||
| Scan355 | Blueprint detailing valve cap dimensions for S.S. Hydraulic Dampers. | ||
| View original record | S.S. HYDRAULIC DAMPERS W D F d WITH A WASHER W OF .020 THICKNESS VALVE CAP DIMENSIONS SHOULD GIVE FRONT SPRING FS4807 L.P. 1.010 H.P. .925 REAR, F76548 L.P. 1.040 H.P. .910 | ||
| Scan356 | Four graphs detailing the adjustment of S.S. damper loads for front and rear shock dampers. | ||
| View original record | ADJUSTMENT OF S. S. DAMPER LOADS. Top Left Graph: LBS LOAD BALL END PACKING WASHER UNDER VALVE CAP THOUSANDTHS OF AN INCH THICK L.P. VALVE FRONT SHOCK DAMPER CASE F80321 SPRING F54807 FREE LENGTH… | ||
| Scan357 | The cross steering tube fouling the front hydraulic dampers and a proposed solution to modify the tube's bend. | ||
| View original record | To DA. from Hs/Rn. c. to BY. X235 Hs/Rml/LG12.4.29. CROSS STEERING TUBE. +7425 G.W.Hancock has reported that the cross steering tube is fouling the bottom of the front hydraulic dampers. The foul… | ||
| Scan358 | From 'R' discussing improvements to hydraulic dampers based on road tests. | ||
| View original record | BY. Hs. DA. from R. c. to SG. E. X.235 R1/M14.4.29. RE. HYDRAULIC DAMPERS. Thanks to Mr. Bailey for the suggestions in his excellent memo. As he says we may find difficulty to take advantage of them.… | ||
| Scan359 | Design, issues, and improvements for hydraulic dampers. | ||
| View original record | DA. Hs. BY. from R. c. to SG. Wor. PN. c. to E. OY. Y235 R3/M.19.4.29. HYDRAULIC DAMPERS. X. 235 X. 7520 I hope it is agreed that restricted passages for the oil are undesirable and dangerous, because… | ||
| Scan360 | Removal of dynamic restrictors from S.S. hydraulic spring dampers and subsequent production changes. | ||
| View original record | BY/HEB [crossed out] c. DA [crossed out] c. SG [crossed out] c. Hs/Rm. [crossed out] c. O.O. [crossed out] X235 BY2/G.22.4.29. S.S. HYDRAULIC SPRING DAMPERS. Please note that R. has definitely decided… | ||
| Scan361 | Letter requesting clarification on a report about hydraulic dampers and asking for a history of starter motor failures. | ||
| View original record | +2935 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. Angleterre. Hs/Rm2/LG29.4.29. +2941 Hotel de France, Chateauroux. Mr. Hancock from Hs/Rm. We think that your reports on the hydraulic dampers are… | ||
| Scan362 | Test results and settings for S.S. hydraulic dampers and shock absorbers. | ||
| View original record | 7235 To R. from Hs. c. to Sg. Wor. c. to E. DA. c. to BY. S.S. HYDRAULIC DAMPERS. Since your recommendation with reference to the S.S. shock absorbers, we have been carrying out a number of tests and… | ||
| Scan363 | Steering and suspension tests, including pivot lean, damper settings, and buffer clearances. | ||
| View original record | Hs. from GWH. C O P Y. Rm. " " ________________ Hotel de France, Chateauroux, Indre. 25.4.29. STEERING. Tests with 2½° and 3½° lean of pivots - we do not find any appreciable difference between 3½°… | ||
| Scan364 | Steering and tyre tests, detailing effects on ride quality, oscillations, and worn tyres. | ||
| View original record | To Hs. and Rm. from G.W.H. C O P Y. Hotel de France, Chateauroux, Indre, France. 26.4.29 STEERING TEST UNDER THE FOLLOWING CONDITIONS: Rear dampers 100 lbs. L. and 100 lbs. H.P. Front dampers 80 lbs.… | ||
| Scan365 | Car riding quality, discussing issues with dampers, shocks, and steering performance. | ||
| View original record | contd :- -2- and no dampers is that the car is riding at times hard and produces small shocks throughout the car, certainly felt more in the front seats than in the rear. With tyres that are worn… | ||
| Scan366 | Weakness of a bent rear shock damper bracket and the proposal to thicken it to double its strength. | ||
| View original record | BY. from DA. c. to SG. c. to Hs. x235 DA3/M1.5.29. 'SS' REAR AXLE. X. 7350 X. 7520 X. 235 With reference to Hs/Rn5/LG25.4.29. We understand that the rear shock damper bracket is not actually broken,… | ||
| Scan367 | Outlining conclusions and recommendations on the design and performance of hydraulic dampers. | ||
| View original record | Hs. BY. from R. DA. c. to SG. Wor. OY. c. to Mr. Fuller. X235 R1/M3. 5. 29. RE. HYDRAULIC DAMPERS. X.235 X.5520 My conclusions at present are as follows :- (1) That the restriction passage, and our… | ||
| Scan368 | Continued discussion on vehicle damping theory in relation to axle and body movement. | ||
| View original record | contd :- -2- theory suggests, that the longer strokes have proportionately more damping than the short strokes, but should have no difference in effect between a quick axle movement and a slow body… | ||
| Scan369 | Request for details for tests on hydraulic shock absorbers. | ||
| View original record | To RHC. from Hs/Rm. x235 Hs/Rm/LC3. 5. 29. x7520- Will you please make us the attached details for tests on hydraulic shock absorbers. Hs/Rm. | ||
| Scan370 | Proposal for an automatically controlled shock damper system using an air spring, adjustable from the driver's seat. | ||
| View original record | Hs. BY. DA. c. to SG. C. c. to Wor. PN. c. to Mr. Claremont. +2-35 R2/M9.5.29. X.7520 X.235. X.5520 SHOCK DAMPERS. It has occurred to me that in connection with road dampers we know it would be an… | ||
| Scan371 | Modifications to the casings of front and rear SS hydraulic dampers. | ||
| View original record | X 235 BY from DA. SECRET. ? DA1/M14.5.29 C. to SG. HS. x4/520. SS. HYDRAULIC DAMPERS. We send herewith N. sch.2890., shewing the modifications to the casings of the front and rear dampers to eliminate… | ||
| Scan372 | Experiments on riding quality, shock absorbers, and road holding, with a comparison to American conditions. | ||
| View original record | To OY. from Hs/Rm. x235 Hs/Rm5/LG14.5.29. x7410 RIDING QUALITY. With reference to your note of the 11th ult. The best way I can answer some of your queries is to tell you what we have been doing on… | ||
| Scan373 | Suspension design and the effect of weight distribution on ride comfort for various car body types. | ||
| View original record | contd :- -2- the main criticism I have of Chryslers in this country is regarding suspension. Therefore although we may seem to lay undue stress on the firmness that we require in our suspension it is… | ||
| Scan374 | Improvements to vehicle riding comfort, focusing on road springs and shock absorber loading. | ||
| View original record | contd :- -3- invaluable adjunct for lowering the pitching speed and increasing the comfort of the passengers in the rear seats. Incidentally, all our observations on riding comfort refer to the rear… | ||
| Scan375 | The results of shock absorber tests, comparing theoretical ideas with practical findings on load settings. | ||
| View original record | contd :- -4- that the loads at the rear should be as high as 75 lbs. up and 150 lbs. down. We started all our tests on shock absorbers over again with the supposition that R. was right and starting… | ||
| Scan376 | Achieving a soft ride using specific shock absorber loadings, referencing the Sales and Experimental Departments. | ||
| View original record | contd :- -5- We do believe that this helps to get a soft ride even with quite appreciable shock absorber loadings. We may find that we can get even better results than we have obtained so far by means… | ||
| Scan377 | On the manufacturing difficulties of oil damper springs for valve F.80991/2. | ||
| View original record | Y235 Hs/Rm. C.BY/HBF. (crossed out) BY7/K. 20. 6. 29. RE OIL DAMPER SPRING FOR VALVE F.80991/2. We cannot buy springs to the limits you specify as there are too many variables and the coiling cannot… | ||
| Scan378 | Testing, rejection, and manufacturing specifications for shock absorber springs. | ||
| View original record | To BY. from Hs/Rn. +235 Hs/Rnl/LG22.6.29. X235 X7520 SHOCK ABSORBER SPRINGS. With reference to the difficulty in working to the limits we specify on the shock absorber valve springs. We did not make… | ||
| Scan379 | Test results for S.S. rear shock damper springs used on HP and L.P. valves. | ||
| View original record | SHOCK DAMPERS - S.S. REAR. F.76548 springs used on both H.P. and L.P. valves. Test A. H.P. spring compressed to 1.000" L.P. " " " 1.150" Test B. H.P. " " " 1.150" L.P. " " " 1.000" | Spring No. | TEST… | ||
| Scan380 | Specifications for rear shock damper springs including high and low pressure values. | ||
| View original record | SHOCK DAMPERS. S.S. REAR. F.76548 - spring used on both H.P. and L.P. valves. H.P. spring compressed to .965" L.P. " " " 1.115" | Spring No. | High press: lbs. | Low press: lbs. |… | ||
| Scan381 | Shock absorber knock complaints and modifications for 20 HP and 40/50 HP cars. | ||
| View original record | To Hs. from Hm. x235. Hm3/KW3.7.29. x3520 x4117 x4118 Shock Absorber Knocks - Depot Sheet No. Hm.105. x235 x7520 Ref: Hs/Rml/LG2.7.29. We note your remarks with regard to drilling the high pressure… | ||
| Scan382 | Alterations to shock damper loads, including spring specifications and adjustment methods. | ||
| View original record | To By. from Hs/Rm X235. Hs/Rn.2/MJ.15.3.29. filing x7520 x235 ALTERED SHOCK DAMPER LOADS. ------------------------- There does not appear to be any difficulty in altering the shock damper loads to… | ||
| Scan383 | The new settings for a hydraulic shock absorber, detailing modifications to valve caps and springs. | ||
| View original record | X235 To By. from Hs/Rm. Hs/Rm.1/MJ. 22. 8. 29. file X235. With reference to the new setting of the hydraulic shock absorber necessitated by the deletion of the dynamic restrictions. We attach curve… | ||
| Scan384 | Graphs and diagrams for front and rear hydraulic shock absorbers, detailing ball pin load versus adjusting washer thickness. | ||
| View original record | HYDRAULIC DAMPERS Top Graph: BALL PIN LOAD LBS ADJUSTING WASHER THOUSANDTHS OF AN INCH H.P. WASHER X = .040 L.P. WASHER X = .060 Diagram Dimensions: .528, 1.420 S.S. FRONT SHOCK ABSORBER SPRING… | ||
| Scan385 | Requesting modifications to rear shock damper cover castings for hydraulic damper tests. | ||
| View original record | X 235. RHC. from Hs/Rm. Hs/Rm2/AD17.10.29. HYDRAULIC DAMPER TESTS. We require two rear shock damper cover castings modified as per sketch Hs.240, to enable us to get an additional air vent and two… | ||
| Scan386 | Recommendations regarding increased poundage on shock absorbers. | ||
| View original record | X235. S/W. Ep. Thn. LE17/H/5.11.29. X.7520 X.235. Shock Absorbers. Attached hereto please find recommendations re increased poundage on shock absorbers. We have taken a copy of this for our… | ||
| Scan387 | Communication regarding the adjustment of hydraulic dampers and how loads can be varied using different washers. | ||
| View original record | 1235 Ps. from Hs/Rm. Hs/Rm6/AD21.11.29. ADJUSTMENT OF HYDRAULIC DAMPERS. A Depot Sheet is being circulated on this subject. In order that you can tackle the gentleman who has complained however, we… | ||
| Scan388 | Shock absorber loads, discussing issues with hydraulic dampers and recommending a change in machining to a reamer finish. | ||
| View original record | X.233. By. from Hs/Rm. Hs/Rm3/AD29.11.29. SHOCK ABSORBER LOADS We are trying to get the Hydraulic Damper setting down to the position where a washer of any given size under the valve cap will give a… | ||
| Scan389 | Feedback on the performance of shock absorbers to inform a re-design. | ||
| View original record | MR. BROCK. From Hs/Rm. X235 Hs/Rm.1/MJ.2.12.29. SHOCK ABSORBERS. ---------------- We are trying to obtain some information of shock absorbers in service. Can you please tell us- (1) Whether you… | ||
| Scan390 | Investigating springing complaints and suspension issues for the Phantom I model. | ||
| View original record | X235. To R. from Hs/Rm. c. Sg. Wor. c. Da. E. c. Hy. Hm. Hs/RM1/MJ10.12.29. X8770 X8008 X8840 X235 X8410 PHANTOM I SUSPENSION. In conjunction with the Repair Dept. we are carrying out tests… | ||
| Scan391 | Analysis of vehicle ride quality, discussing pitching, spring lubrication, hydraulic shock absorbers, and maximum spring deflection. | ||
| View original record | Hs/Rml/MJ10.12.29. contd. -2- pitching at the higher speeds is introduced. The light fabric body however, is most difficult to deal with as it has a tendency to pitch over the whole running range.… | ||
| Scan392 | Experimental improvements to vehicle ride quality using different springs and drilled valves, focusing on Phantom I, Phantom II, and light fabric-bodied cars. | ||
| View original record | Hs/Rml/MJ10.12.29 contd. -3- appears to be absolutely essential to get the full benfit from these weak springs. For light fabric bodied cars which we have so far failed to improve to any great extent,… | ||
| Scan393 | Specifying updated valve cap washer dimensions for Phantom II hydraulic shock dampers. | ||
| View original record | To By. From Hs/Rm. X235 Hs/Rm. 7/MJ.10.12.29. HYDRAULIC SHOCK DAMPERS. We have now established that the valve cap washers required to give the correct loads on the hydraulic dampers with the new… | ||
| Scan394 | Frame torsional weakness in relation to shock absorbers, radiator 'jellying', and 'shimmy'. | ||
| View original record | OY. From Hs/Rn. x235 Hs/Rn.8/MJ.24.2.30. x7772 x235. Thank you for your note OY3/10.2.30. You will observe that our recent memo re. radiator "jellying" deals with the point you raise. The frame is so… | ||
| Scan395 | Outlining recommendations for road springs and damping on Phantom II and 25 HP models. | ||
| View original record | X235 Hs. E. ) FROM R. Ds. OY. ) c. SS. Wor. PN. c. EV. EP. R/144.5.30. ---------------- X.7772 X.3806 X.7520 X.5520 X.7410 X.5410 X.235. PHANTOM II. AND 25 HP. AMERICAN & EUROPEAN ROAD SPRINGS AND… | ||
| Scan396 | List of urgent design work for cars, detailing potential improvements to the petrol pump, carburetter, gearbox, and shock dampers. | ||
| View original record | Rg. E. ) FROM R. Da. HS. ) C. Sg. Wor. C. By. F. X235 RL/M20.5.30. DESIGNING WORK. LIST IN ORDER OF URGENCY CARS. X.2917. X.5770 X.523 X.7770 X.235 PETROL PUMP To simplify system and reduce cost (P.2)… | ||
| Scan397 | The philosophy of product design, continuous improvement, and remaining competitive. | ||
| View original record | -2- R1/M20.5.30 contd. Some of these may be what are needed, and are no doubt valuable ideas that should not be lost. It is so expensive and such an upheaval to make changes that they must be… | ||
| Scan398 | Cover note for an attached document describing opinions on how to handle vehicle springing complaints from a service point of view. | ||
| View original record | Sevres/W "By from Ps." X235 Copy "Hs". PSI/MLB.4.7.30 X 7410 X 5410, Y 235. re: Springing The attached is an attempt to describe my opinions as to how spring complaints should be tackled from a… | ||
| Scan399 | Technical note discussing experiences and recommendations for car springing and damper settings. | ||
| View original record | SPRINGING OF R.R. CARS As a result of fair experience with Springing Complaints on R.R. Cars of all categories, I think I am in a position to make a few notes which might prove of value to those who… | ||
| Scan400 | Car suspension, focusing on the design and damping of cushions and squabs to improve ride comfort. | ||
| View original record | - 2 - When the front dampers have been set to keep the nose of the car steady over uneven roads, it may be considered that very little more can be done with the design and material at our disposal.… | ||
| Scan401 | Suspension characteristics, specifically spring flexibility and shock absorber damping. | ||
| View original record | -3- at low speeds. This is quite natural because one is riding on a Hydraulic machine instead of resilient springs, yet when a customer complains of hard riding, our thoughts fly to weaker springs… | ||
| Scan402 | Customer complaints for faulty hydraulic shock dampers, listing chassis numbers and the specific issues. | ||
| View original record | By O.to EP O.to Sft C.to Hs. (4 1/2) 3/30 X235. Hd/CI.12/KH. 3. 10. 30. FAULTY HYDRAULIC SHOCK DAMPERS. *********************** We have received back in Works faulty Hydraulic Shock Dampers as… | ||
| Scan403 | Technical discussion on the evolving role and challenges of shock dampers in car design. | ||
| View original record | SG. PN. } FROM R. C. C. to WOR HS. BY. C. to E. DA. CAR WORK - SHOCK DAMPERS. X2351 (crossed out) RL/M15.11.30. Sent off 22.11.30. X.7520. X.5520. X.235. The situation about these is not very well… | ||
| Scan404 | The development and performance of shock dampers and associated fittings. | ||
| View original record | (2) Our first move towards making these fittings give better satisfaction is to shorten the levers at the back so that the duty is performed with less stresses and to limit the movement of the axle,… | ||
| Scan405 | Postscript discussing issues with shock dampers, their positioning, and problems with connecting rods and central oiling. | ||
| View original record | (3) P.S. We cannot on examination find much the matter with the dimensions and proportions in use in the present shock dampers. I personally do not like the position of the P. 2. dampers in the… | ||
| Scan406 | Modifications to a ball valve to address hydraulic shock absorber knocks. | ||
| View original record | To BY. From Hs/Rm. c. to RHC. X235 Hs/Rm.4/MJ.18.11.30. HYDRAULIC SHOCK ABSORBER KNOCKS. With reference to the proposed restriction and the movement of the ball valve over the air vent. We find that… | ||
| Scan407 | Short memo regarding the dispatch of shock absorber diagrams after examination. | ||
| View original record | X 235 HS/RM. FROM DA. DA4/M1.12.30. re. SHOCK ABSORBER DIAGRAMS. I despatched these to you hurriedly on Sat. last, and hope that you received them. I held them for a day or two for further… | ||
| Scan408 | Letter to a Mr. Beaver explaining the historical design evolution of the Phantom 2's suspension and transmission systems. | ||
| View original record | COPY TO - SG. COPY TO - HS. X>35 "ELMSTEAD" WEST WITTERING CHICHESTER. ENGLAND. 1st. December 1930. X.7410. X.7520. X.235. Dear Mr. Beaver, SPRINGING OF PHANTOM 2. I am sorry to hear that you were… | ||
| Scan409 | Vehicle weight distribution, springing, and shock damper improvements on various models. | ||
| View original record | (2) Experiments also shewed that if we could get the weight away from the centre of the car and carry it back, over and behind the back axle, the riding would be better, and pitching would be less.… | ||
| Scan410 | Letter from F. H. Royce discussing issues with shock dampers and comparing them to Lovejoy's design. | ||
| View original record | (3) But our present dampers should not be unsatisfactory. I have only experienced two troubles - (1) slack developed in the external links, .006" being sufficient to be heard or felt in the rear. This… | ||
| Scan411 | Performance and design issues of hydraulic dampers compared to competitor's, Lovejoy. | ||
| View original record | HS. EY. } FROM R. DA. X235 C. to SG. WOR. C. to PN. EP. re. HYDRAULIC DAMPERS. It is very distressing to hear that Lovejoy dampers are thought to have beaten us. It has been something of a neck and… | ||
| Scan412 | Design critique regarding the positioning of rear components under the frame and its impact on road clearance. | ||
| View original record | (2) I prefer the rear ones under the frame as on 25HP. but this is handicapping our design as we are obliged to keep the vertical height down to less than 4" because of the road clearance. I prefer… | ||
| Scan413 | The experience with hydraulic shock dampers on the Phantom I and Phantom II models. | ||
| View original record | X235. To R. From Hs/Rn. c. to Sg. Ror. c. to H. Da. c. to Hy. EP. HYDRAULIC SHOCK DAMPERS. ************************* In view of the fact that these are in process of re-design, we think it may be… | ||
| Scan414 | Analysis of shock damper issues, including noise, deflection, oil emulsification, and their effect on ride quality. | ||
| View original record | -2- enormously in the last few years are average speed and road surfaces, the latter particularly now giving us waves or undulations instead of pot-holes and so requiring different treatment. (b) The… | ||
| Scan415 | Damper performance, high-speed road holding, and maintenance issues such as knocks and oil loss. | ||
| View original record | -3- hydraulic load of 60 lbs, + 10 to 15 lbs. Hartford load than we do from the standard 80 lbs. hydraulic load. (b) High Speed Road Holding & Steering. Here again we find that the standard damper… | ||
| Scan416 | The design and performance of various damper components, including pin joints, valves, and attachments. | ||
| View original record | -4- Hs/SA.1/SL.2.12.30.Contd. in such a case would appear to be to allow sufficient capacity above the oil level in the atmospheric chamber to take care of oil so expelled. This chamber would also… | ||
| Scan417 | Report discussing damper springing, valve accessibility on Phantom II dampers, and effective mean ball pin load measurements. | ||
| View original record | -5- Hs/En.1/LAL.2.12.30.Contd. securing the rear dampers "spring" quite appreciably. We are taking exact measurement but the movement is clearly visible when the damper is running under normal loads.… | ||
| Scan418 | Diagrams showing the progressive falling off in rear damper efficiency with the reduction of stroke. | ||
| View original record | FIG.1. P.II REAR DAMPER LOADS 80/85. OVAL LEVER USED. DIAGRAMS SHOW PROGRESSIVE FALLING OFF IN DAMPER EFFICIENCY WITH REDUCTION OF STROKE. LOW PRESSURE DIAGRAMS HIGH PRESSURE DIAGRAMS Graph Data:… | ||
| Scan419 | Series of graphs showing the effect of restricting air vent ball lift on a Phantom II rear shock damper. | ||
| View original record | FIG III P. II REAR SHOCK DAMPER. 450 R.P.M. 1" STROKE. AIR VENTS .025 DIA. OIL TEMP. 25°C LOADS 80/85. GRAPH BOX 1 (TOP LEFT): AIR VENT BALLS. H.P. & L.P. LIFT .010 H.P. STROKE. FIG. I. GRAPH BOX 2… | ||
| Scan420 | Graph and diagram illustrating S.S. rear shock damper lever tests. | ||
| View original record | FIG II S.S. REAR SHOCK DAMPER LEVER TESTS LEVER USED FOR INDICATOR DIAGRAMS FISH-BACKED SECTION PRESENT STANDARD LEVER F.80336/7 STRAIGHT-SIDED SECTION DEFLECTION - INS .250 .200 .150 .100 .050 LOAD… | ||
| Scan421 | Design and preference for double vertical piston type hydraulic dampers. | ||
| View original record | DA/HDY. FROM R. HS. (At Le Canadel.) C. to SG. WOR. C. to BY. E. X235 R1/M15.12.30. CAR WORK - re. HYDRAULIC DAMPERS. DOUBLE VERTICAL PISTON TYPE. At the moment we prefer this type because there is no… | ||
| Scan422 | Design drawing with notes for a shock damper mechanism. | ||
| View original record | (SHEET 2.) SHOCK DAMPERS. Piston die cast perhaps in bronze, square hole in centre with smallest practical taper, but stirrup can fit pressure plate instead. Suggest we try which is the better: I… | ||
| Scan423 | Print of a hydraulic shock damper with vertical pistons and a change to the filter design. | ||
| View original record | R. FROM DA. Copy to SG. " BY. " HS. X235 DA1/M24.12.30. HYDRAULIC SHOCK DAMPERS. X.7520. X.5520. X.235. Attached herewith is a print of N. sch. 3190., (original to BY.) shewing hydraulic damper with… | ||