Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Modification notice for chassis RE 12.EX, regarding increased damping on the servo balance links. | ||
| View original record | To GWH from RHC. X370 RHC14/BE. 23.6.26. RE 12.EX. CHASSIS The following modification has been carried out on the above Chassis. X.B370 - Servo Mechn Increased Damping on Servo Balance Links fitted in… | ||
| Scan002 | Requesting the results of experiments with a steel spring in the servo operating gear for the Phantom and 20 HP models. | ||
| View original record | To Hs. from DA. X7370 DA2/M12. 8. 26. RE. FLEXIBILITY IN SERVO - PHANTOM AND 20 HP. X.7370 X.5370 We are wishing to hear the results of experiments with the steel spring in the servo operating gear,… | ||
| Scan003 | Modifications to the servo stop and brake linkage system, including the balancing lever and suspension links. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X7370 DA3/M27. 8. 26. EAC. 7. SERVO STOP, BRAKE LINKAGE ETC. X. 7370 X. 8420 [crossed out] X7420 [crossed out] We send herewith N.sch. 2256 shewing the arrangement of the… | ||
| Scan004 | Modifications to the Phantom Servo Brake Gear to prevent a pin fouling the suspension link. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X7370 DA4/M27.8.26. PHANTOM SERVO BRAKE GEAR. X.7370 X.8370 X.7420 With reference to the question of preventing the pin in the upper jaw of the balancing lever fouling… | ||
| Scan005 | Modifications to the servo linkage, specifically the hand brake lever spring and a lubricator boss. | ||
| View original record | To BY. from DA. c. to BJ. HS. X7370 DA1/M2.10.26. EAC.7. SERVO LINKAGE. X.7370 X.7420 Replying to BY/CGH6/H27.9.26., we regret that the omission to shew the hand brake lever has caused us to take up… | ||
| Scan006 | Standardisation report on increasing the friction area of servo balance links for damping. | ||
| View original record | RR 755 (10M) (DB130 12-9-24) MS 301225 X/7370 COMPLETED 20.10.26 STANDARDISATION of CHASSIS PARTS. Date 22.9.26 Description of Parts SERVO BALANCE LINKS. X No. 7370 Drawing N sch. No. 2194 Part List… | ||
| Scan007 | Proposed modifications to the servo brake mechanism to reduce front braking power. | ||
| View original record | To BY. Hs. } DA. X7370 DA2/M1.12.26. [strikethrough]SKEFKO[/strikethrough] SERVO BRAKE MECHANISM. X.7370 X.8370 With reference to the servo brake operation we have wired you suggesting that the… | ||
| Scan008 | Resolving 'servo jaggers' with spring dampers and recommending the standardization of this solution. | ||
| View original record | X7370 To Hs. from GWH. Hs/GWH;22.12.26. RE. SERVO JAGGERS. X8370 We are now satisfied that jaggers can be overcome by using spring dampers G.74957 made to the sketch herewith. We have tested this… | ||
| Scan009 | Standardisation sheet discussing an alteration from rubber to flat steel springs to improve flexibility in the servo shaft. | ||
| View original record | To B.J. from Hs. X7370 Hs6/LG18.1.27. STANDARDISATION SHEET. FLEXIBILITY IN THE SERVO SHAFT. X8370 The alteration from rubber to flat steel springs as a means of introducing flexibility in the XXXX… | ||
| Scan010 | Unsatisfactory friction arrangement on the EAC.VII servo linkage due to an underperforming spring. | ||
| View original record | To DA. from Hs/Rm. X7370. Hs/Rm3/LG24.2.27. RE, FRICTION ON EAC.VII SERVO LINKAGE. The friction arrangement for the swinging link on EAC.VII is unsatisfactory. We give below a report from GWH. We… | ||
| Scan011 | Friction calculations and spring specifications for the EAC.7 servo linkage. | ||
| View original record | X.7370 TO HS/RM. from DA. DA2/M17.3.27. FRICTION OF EAC.7. SERVO LINKAGE. ---------- With reference to Hs/Rm3/LG24.2.27., the spring called for on our design is 410 lbs. which, with a coefficient of… | ||
| Scan012 | Technical memo discussing a discrepancy in load measurements on an EAC.7 servo linkage, complete with a diagram. | ||
| View original record | To DA. from Hs/Rm. X7370 Hs/Rm3/LG21.3.27. FRICTION OF EAC.7. SERVO LINKAGE. X7370 X7420 With reference to DA2/M17.3.27. We believe that your query is due to the peculiar method in which the Works… | ||
| Scan013 | Complaint regarding the friction head in the servo linkage and a proposed new spring. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X7370 DA5/M7.4.27. EAC.7. FRICTION HEAD IN SERVO LINKAGE. X. 7370 X. 7310 X. 7420 With reference to the complaint that it is found impossible to get more than 16 lbs. in… | ||
| Scan014 | Manufacturing feasibility and specifications for a servo worm gear assembly. | ||
| View original record | To BY. from DA. c. to BJ. Hs. 47870 DA3/M23.11.27. EAC.10. GEARBOX. X.7310 X.7870 Herewith we send N.sch. 2508 shewing the assembly of the servo worm gear. The object of sending you this is to… | ||
| Scan015 | Design and sourcing of worm gears for an integral gearbox servo. | ||
| View original record | BY. Hs. from R. c. to BJ. Wor. c. to DA/HDY. 47370 R5/M24.11.27. EAC.10 INTEGRAL GEARBOX SERVO WORM DRIVE. X. 7310 X. 7370 X. 2061 Mr. Bentley of Royce Ltd., has given me the following name as having… | ||
| Scan016 | Torque calculations and specifications for the EAC.10 servo gears. | ||
| View original record | To B.Y. from Hs/Rm. X7370 X7420 X.7370 Hs/Rm4/LG13.12.27. We understand you are interested in the torque which will have to be transmitted through the EAC.10 servo gears. We estimate that this will be… | ||
| Scan017 | Calculation sheet for the torque required on 40/50 servo gears, including leverage diagrams. | ||
| View original record | X7370 Hs/Rml/LG14.12.27. TORQUE ON 40/50 SERVO GEARS. Maximum torque required from brakes is to lock the rear wheels on dry concrete. Take limousine car 8-EX : Rear wheel weight 32 cwts. = .8 .. Pull… | ||
| Scan018 | General arrangement for the EAC.10 servo, noting a smaller diameter than the Phantom and proposing a Ferodo lining. | ||
| View original record | X. 7370 BY. from DA. c. to BJ. Hs. DA2/M31.1.28. EAC. 10 SERVO. Herewith we send N.sch.2538 - Gen.Arrgt. of the servo and balance lever. It will be seen that the servo diameter is less than on the… | ||
| Scan019 | Use of a Bostock & Bramley worm gear for the servo system to handle heavy loads. | ||
| View original record | DA. E. BY. HS. from R. c. to BJ. Wor. 47370 R3/M2. 2.28. EAC.10 SERVO WORK. X.7370 X.2061 In the gearbox integral with the engine this has been arranged direct drive like the 20 HP. Owing to the… | ||
| Scan020 | The production of servo worm gear blanks and a supplier's proposed design change. | ||
| View original record | R. [crossed out] C. DA. [crossed out] C. E. [crossed out] C. HS. [crossed out] X73707 BY7/G.13.2.28. X7370 EAC.10. SERVO WORM GEAR. ------------------------- With reference to R3/M2/2.28. we are now… | ||
| Scan021 | Dispatch of drawing N.sch.2539, which details the arrangement of brake differentials and their servo connection. | ||
| View original record | BY. from DA. c. to BJ. Hs. X7370 DA1/M13.2.28. EAC.10 BRAKE DIFFERENTIALS. X.7420 X.7370 X.7310 We send herewith N.sch.2539 shewing the arrgt. of the brake differentials and connection to the servo.… | ||
| Scan022 | Request to issue a Standardisation Sheet for modified servo gears with a larger pinion on the 40/50 HP chassis. | ||
| View original record | X7370 Hs. BY/Cgh7/K. 12. 7. 28. 40/50 HP CHASSIS SERVO GEARS. With reference to the modified servo gears in which we have larger diameter pinion, we understand that these were fitted on chassis 14-EX… | ||
| Scan023 | Trouble with 40/50 HP Chassis Servo Gears and a recommendation to delay standardization. | ||
| View original record | X7370 To BY/Cgh. from Hs/Rn. Hs/Rn3/LG25.7.28. 40/50 HP. CHASSIS SERVO GEARS. With reference to your BY/Cgh7/K12.7.28. we ran two sets of these - we have had trouble with the worm on one. We therefore… | ||
| Scan024 | Internal request for a drawing of the brake servo drive from the transmission shaft and details on its gear reductions. | ||
| View original record | X7370 S/W. Hs. CWB8/GM/1.12.28. Have you got any convenient sketch or detailed drawing which shows the driving of our brake servo from the transmission shaft? If you have, I should be very glad if you… | ||
| Scan025 | Modifications for 'SS' brakes to be fitted to chassis 19-EX. | ||
| View original record | To RIC/H. Smith from Hs/Rn. X7370 Hs/Rm2/LG13.12.28. 'SS' BRAKES. X7470 Will you please fit up 19-EX brakes with the following modifications from standard :- 1. 30° cams. 2. Countershaft lever G.76811… | ||
| Scan026 | Instruction to experimentally modify the 'SS' chassis brakes by changing the servo cams and increasing the length of lever G.76811. | ||
| View original record | 47370 To BY. from Hs/Rn. Hs/Rn6/LG17.12.28. 47420 'SS' BRAKES. Will you please instruct [struck through text] the SS. chassis to be made experimentally to have 30° cams on the servo and the length of… | ||
| Scan027 | Query to confirm the correct angle for the Phantom servo operating cams, discussing a 55 degree versus a 45 degree angle. | ||
| View original record | Hs/Rm. from DA. c. to _______ X7370 DA1/M18.12.28. 'SS' SERVO & BRAKES. X.7370 XJ420 The detail drgs. of the Phantom servo operating cams which we have give a 55° angle. We recollect your speaking of… | ||
| Scan028 | Technical memorandum discussing the performance and issues with 'SS' brakes and servo mechanisms. | ||
| View original record | To DA. from Hs/Rm. c. to BY. c. to Wor. +7270 Hs/RmL/LG18.12.28. 'SS' BRAKES. +7420 The two chassis we have so far tried with brake leverages to N.Sch.2539 and servo arrangement to N.Sch.2538 both… | ||
| Scan029 | Comparative analysis of two servo designs ('40/50' and 'S S') using calculations for braking forces and wheel skid characteristics. | ||
| View original record | contd :- -2- with a 'flick' application possible to lock the front wheels, of the pedal, whereas with gradual application the rear wheels would always skid first. It would therefore appear that for… | ||
| Scan030 | Braking performance, servo equality, chassis weight reduction, and lever modifications. | ||
| View original record | contd :- -3- SS. servo has only 56% of the power of the old 40/50. This is rather the impression that is given on the road. To bring the servos on equality, therefore, we have fitted 30° cams. The… | ||
| Scan031 | Calculations and analysis of servo efficiency and cam angles. | ||
| View original record | contd :- -4- DIRECT : 16.65/6.25 x 1.375/1.725 x 2.00/2.00 x 1.875/4.00 x 2.85 x 16.2 = 21.5 SERVO REAR : 16.65/6.25 x 1.37/1.725 x 2.125/2.00 x 2.85/4 x 16.2 X S = 26.5 X S = 26.5 X .85 = 22.3 SERVO… | ||
| Scan032 | Servo cam angles, coefficients of friction, and load loss for the Phantom and 20 HP models. | ||
| View original record | Hs/Rm. from DA. c. to Wcr. BY. +7370 DA3/M21.12.28. SERVO. X.5370 X.7370 We thank you for your Hs/RmL/LG18.12.28. We have gone over our figures again, and we have also searched back through the files… | ||
| Scan033 | Cam angle for the 'SS' servo and brakes on the Phantom chassis. | ||
| View original record | To DA. from Hs/Rn. c. to BY. c. to Wor. X7370 Hs/Rm3/LG22. 12.28. 'SS' SERVO AND BRAKES. Y7420 With reference to DA1/M18.12.28. We find the present angle of cam being used on the Phantom is 55° and… | ||
| Scan034 | Technical memo detailing the results of bench and road tests on the 'SS' servo leverage. | ||
| View original record | X7370 To R. from Hs/Rm. c. to BJ. SG. c. to WCr. DA. c. to BY. Hs/RmL/LG1 2.1.29. 'SS' SERVO LEVERAGE. We have now carried out bench tests to determine the efficiency of the SS. servo. We give you the… | ||
| Scan035 | Continued discussion on direct braking, servo torque multiplication, and brake distribution. | ||
| View original record | contd :- -2- The actual direct braking we are using is only 6% lower than on 14-EX. We think that to use more direct braking than on 14-EX gives the foot pedal an unnecessary feeling of sponginess. We… | ||
| Scan036 | Performance comparison graph between a Super-Sports servo and a standard Phantom servo. | ||
| View original record | SUPER-SPORTS SERVO TEST. V536 Spg. Bal. 'A' Spg. Bal. 'B' VALUE OF 'B' (LBS.) VALUE OF 'A' (LBS.) STD 'PHANTOM' SERVO. CAR NO 44 PK. 55° CAMS. (AVERAGE TORQUE MULTn = 2.08). SUPER SPORTS SERVO. ENGINE… | ||
| Scan037 | Heavily faded typewritten document with a purple 'Print Room' stamp in the bottom right corner. | ||
| View original record | The main body of text is illegible due to severe fading. Text from the stamp in the bottom right corner: ROLLS-ROYCE, LIMITED PRINT ROOM 11 JAN 1929 | ||
| Scan038 | Investigation into the angle of servo cams and lever length for the 'SS' brake gear. | ||
| View original record | HS. from DA. Y7370 DA1/M27.1.29. 'SS' BRAKE GEAR. X.7420 X.7370 We investigated the question of the angle of the servo cams, length of lever, etc. on the SS. servo and found that to obtain the… | ||
| Scan039 | Suggestion (N.sch. 2816) to prevent servo driven plate pins from seizing up. | ||
| View original record | BY. from DA. c. to SG. Hs. X7370 DA2/M6. 2. 29. 'SS' SERVO. X.7370 We send herewith N.sch. 2816 shewing a suggestion for obviating the difficulty of the pins connecting the two driven plates of the… | ||
| Scan040 | Oil conveyance for the 'SS' servo mechanism and adjustments to the countershaft lever. | ||
| View original record | X7320 By. from DA. c. to Sg . Hs. DA3/114.2.29. 'SS' SERVO MECHANISM. X.7370 X.3806 Herewith we send N.sch.2827 shewing a suggestion for conveying some of the oil from a servo drip plug on to the cam… | ||
| Scan041 | Production of the 'SS' servo and brake mechanism, particularly concerning the servo linings. | ||
| View original record | To BY. from Hs/Rm. X7370 Hs/Rm3/LG13.3.29. 'SS' SERVO MECHANISM. X7420 We consider that it will be safe to proceed with the SS. servo and brake mechanism with the exception of cams, and servo linings… | ||
| Scan042 | Testing fabric for the servo due to slight heating concerns on long hills. | ||
| View original record | X. 7370 BY. from DA. c. to Sg. Hs. DAL/M26.3.29. SS. SERVO. With reference to BY6/G22.3.29., this same point was raised with Hs. at the time of the experiment. It is understood that the heating of the… | ||
| Scan043 | Historical outline and test results for the braking system on S.S. cars. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Wor. c. to E. DA. c. to BY. x7370 Hs/Rm/1019.4.29. 'SS' BRAKES. x7420 We have been making continuous tests with the braking system on S.S. cars and consider it is desirable… | ||
| Scan044 | Investigation into brake sponginess and servo performance on the S.S. model compared to the Phantom. | ||
| View original record | contd :- -2- a persisting feeling of sponginess. (3) The front brakes appeared to be doing far too much work as they started to squeak on all cars. (a) Investigation of (1) shewed it to be due to the… | ||
| Scan045 | Tests and modifications to improve brake linkage efficiency and operation. | ||
| View original record | contd :- -3- (c) We carried out tests to establish the efficiency of the linkage. We attach a chart showing the results obtained. The torque at the camshaft was measured by a lever fitting over the… | ||
| Scan046 | Reverting to original direct rear braking to balance front and rear linkage efficiency. | ||
| View original record | contd :- -4- Improving the rear brake equalising shaft has also improved (2). (3) To overcome (3) we are reverting to the original direct rear braking and may find it necessary to reduce the leverage… | ||
| Scan047 | Efficiency calculations and data for the 'SS' brake linkage system. | ||
| View original record | EFFICIENCY OF BRAKE LINKAGE SS 1) DIRECT PEDAL LINKAGE FROM PEDAL TO REAR BRAKE COUNTERSHAFT Lbs/ft TORQUE AT ONE CAMSHAFT PER PEDAL LOAD P = 1/2 [ (16.65 x 1.375 x 2.00 x 1.875) / (6.25 x 1.125 x… | ||
| Scan048 | Confirming instructions to fit up the 21-EX car with original W.W. leverage and 45° cams in the servo. | ||
| View original record | To RHC. from Hs/Rm2/LG18. 4. 29. X7370 X7470 This is to confirm that you will fit up 21-EX car with the original W.W. leverage from the brake pedal to the servo i.e., lever F.76811 to be 1.375" long… | ||
| Scan049 | Confirming the desirability of altering car leverage to prevent squeaking front brakes. | ||
| View original record | To BY. from Hs/Rn. x7370 x7420. Hs/Rm3/LG17.5.29. Further to BY22/G16.5.29. and our conversation on the subject. We want to confirm that it is very desirable to get the altered leverage on the cars… | ||
| Scan050 | Instructions for alterations to the servomechanism on the 40/50 HP chassis for all SS production cars. | ||
| View original record | Hs. X7370 BY/Cgh7/G.25.5.29. 40/50 HP. CHASSIS - SERVOMECHANISM. With reference to Hs/Rm3/LG.17.5.29. we have completed our instructions to the Works for the altered levers and the new servo lining,… | ||
| Scan051 | Confirmation to slightly reduce the outside diameter of the woven cotton servo lining to prevent squeaking. | ||
| View original record | To BY. from Hs/Rm. X7370 Hs/Rm1/LG28. 5. 29. 'SS' SERVO LINING. This is to confirm that we wish you to make sure that the outside dia. of the woven cotton servo lining is slightly reduced so that it… | ||
| Scan052 | Inconsistent servo action and a new woven cotton disc servo lining. | ||
| View original record | To R. from Hs/an. c.c. to SG. Wor. c.c. to E. DA. c.c. to BY. 47370 Hs/an3/LG29.5.29. S.S. BRAKES AND SERVO. 47420 With reference to OY/4.6.23. In our experience inconsistent servo action has been… | ||
| Scan053 | Technical memorandum discussing brake lining wear, performance, and alternative cam configurations. | ||
| View original record | contd :- -2- Tests we have been carrying out during the past year rather confirm OY's remarks that hard linings with tremendous wearing qualities give poor life in the long run due to scored drums and… | ||
| Scan054 | Squeaking brakes, comparing the performance of Johns-Manville and Ferobestos brake linings. | ||
| View original record | contd :- -3- proportionally greater than that of the rear brakes for the work they do. Squeaking brakes are certainly a very considerable problem and are in evidence whenever we try and increase the… | ||
| Scan055 | The results of a 10,000-mile test on lubricated cotton duck linings for the 'SS' servo. | ||
| View original record | COPY. To Hs/Rn, from Hs/GWH. 29.5.29. RE. LUBRICATED COTTON DUCK LININGS FOR 'SS' SERVO. We carried out tests during the 10,000 miles in France with the cotton duck servo linings lubricated. We found… | ||
| Scan056 | Responding to an earlier memo, detailing modifications to S.S. cars regarding springs, servo lining, thermostat, and exhaust fittings. | ||
| View original record | To BY. from HS. C. to EP. [EP is crossed out] C. to Mr. Sft. X7370. HS.2/MJ. 26.7.29. Handwritten notes: X7770, X7410, X7230, X7370. S.S. CARS. ----------- Replying to TAH/H.25.7.29. We expect that… | ||
| Scan057 | Modifications to steering and damper components on S.S. cars to prevent clicking and improve lubrication. | ||
| View original record | -2- Further points on the S.S. cars which we re- commend should be dealt with as soon as possible are - alteration to side steering tube ball pads to prevent clicking, modification to the lubrication… | ||
| Scan058 | Clarifying the use of cotton duck fabric linings for the S.S. Chassis Servo Motor Mechanism. | ||
| View original record | V7370. BP. c. Hs. c. MX. SFT/JMW2/B.13.8.29. Re - S.S. Chassis. ---------------- With reference to your memo Thn7/H25.7.29. and item No.2. namely - 'Servo Motor Mechanism', we would point out that… | ||
| Scan059 | Letter from the American branch to Derby discussing a 'Brake Clank' issue and proposed solutions. | ||
| View original record | X7370 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. OY=1 August 19th, 1929. Mr. Robotham, Rolls Royce Ltd., Derby, England. Dear Mr. Robotham: BRAKE CLANK (underlined) Thank you for your personal… | ||
| Scan060 | Technical explanation of the operation and silent release mechanism for a servo brake system. | ||
| View original record | - 2 - Quite apart from the use of fibre-faced stops or additional stops, I want to make it clear that we claim to have silenced servo release entirely on a car with metal stops by the following:- (1)… | ||
| Scan061 | Letter from Maurice Olley of Rolls Royce of America, Inc. discussing issues and solutions for front brake adjustment and layout. | ||
| View original record | - 3 - Then front axle pull off springs cause T lever to move forwards bodily towards position H, closing stop M before stop D is closed. The trouble with our present layout is that with normal brake… | ||
| Scan062 | Testing of a method to avoid brake clanks, noting initial results were not entirely successful. | ||
| View original record | X7370. To Oy. R.R.I.A. From Hs/Rm. Hs/Rm.9/AJ.17.9.29. X7370 BRAKE CLANKS ------------ We have gone to a considerable amount of trouble to test out your method of avoiding brake clanks. Attached is a… | ||
| Scan063 | Tests carried out to eliminate servo brake clanks, in response to a letter from Mr. Olley. | ||
| View original record | To Hs/Rn. from G.W.H. GWH.1/MJ18.9.29. Tests carried out to eliminate Servo Brake Clanks in answer to MR. Olleys letter of the 19.8.29. In dealing with this problem, the first feature to be settled… | ||
| Scan064 | The performance and issues of a servo braking system linkage and its on-road testing. | ||
| View original record | -2- final movement of the scissor levers coming to rest upon the servo stops. He obtains this movement by lifting the centre of the suspension of the 'T' lever up 2.000. The result is the action of… | ||
| Scan065 | Testing two schemes, a pneumatic damper and friction plates, to overcome clanking in a braking system. | ||
| View original record | -3- We have tried out two schemes of our own to overcome the clank. The first was to use a pneumatic damper between the 'T' arm and the front brake equalizing shafts. The one tried was too small in… | ||
| Scan066 | On reducing brake friction loads and adding rubber stops to quieten the brake release. | ||
| View original record | -4- not being powerful enough to return the servo leakage when operated slowly. To obtain satisfactory results at slow speeds the friction loads had to be reduced to 'T' arm 14 lbs. and swinging arm… | ||
| Scan067 | Blueprint diagram illustrating a servo action mechanism. | ||
| View original record | DRAWING NO. S.K. 362: SEE ALSO THE FOLLOWING OPERATION DRAWINGS Diagram Labels: A, B, C, D, E, F, F', G, H, J, K, L, M, N Handwritten Note: SEE by 1. Aug 19/29. Stamp: AUG 1 9 1929 Title Block:… | ||
| Scan068 | Drawing illustrating experiments and a proposal to cure a 'clank' in the servo brake system. | ||
| View original record | I STANDARD To Rear Brakes To Front Brakes PIVOT 3.925 3.925 Normal movement to apply rear brakes is slightly less than movement to apply front i.e. center of rotation of T lever is at point A. Clank… | ||
| Scan069 | Testing different servo lining materials, including Halo and cotton duck fabric, to improve brake servo efficiency. | ||
| View original record | X7370 To R. from Hs/Rn. c. to D. c. to E. c. to SS. E. or. Cy. Hs/Rn.1/WJ.21.9.29. In connection with the S.S. we have done a considerable amount of work on servos. It will be remembered that we were… | ||
| Scan070 | Tests and recommendations for improving servo efficiency and brake operation consistency through various modifications. | ||
| View original record | -2- with its efficiency restored by using 30° cams. Curves Y.680 were the average of agood many tests and indicate that the servo operation is much more consistent when the friction linings are soaked… | ||
| Scan071 | Graph comparing the consistency of performance between dry and oil-soaked servo fabric. | ||
| View original record | V680. COMPARISON OF CONSISTENCY OF PERFORMANCE OF DRY & OILED SERVO FABRIC. ENGINE N: SS.5. 45° CAMS. MAXIMUM PERCENTAGE VARIATION OF OUTPUT LOAD 'B' OVER SEVERAL READINGS. INPUT LOAD 'A' (LBS). DRY… | ||
| Scan072 | Blank page with a rectangular date stamp in purple ink. | ||
| View original record | LIMITED ROOM, 25 JUN 1929 BY. | ||
| Scan073 | Graph showing servo efficiency curves for various material and mechanical configurations. | ||
| View original record | SERVO EFFICIENCY CURVES (S.S.) SPRING BALANCES FOR ASCERTAINING LOADS 'A' & 'B' RIGGED UP AS SHOWN ON V535. LOAD OUTPUT 'B' (LBS) LOAD INPUT 'A' (LBS.) CURVE 1 CURVE 2 CURVE 3 CURVE 4 CURVE 5 CURVE 6… | ||
| Scan074 | Blank page with a Print Room date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 JUN 1929 DERBY. | ||
| Scan075 | Customer complaints about clanking noises from the brake mechanism and proposed solutions. | ||
| View original record | R. From Hs/Rm. c. Sg. c. Wor. E. c. Da. BY. OY. X7370 Hs/Rm.5/AD8.10.29. X.7420 X.7370 X.5420 X.5370 CLANKING OF BRAKE MECHANISM. We regularly get complaints about the clank which occurs in the brake… | ||
| Scan076 | Resolving brake arm and noise issues by fitting a cushioned stop and considering a dash pot solution. | ||
| View original record | -2- arm does not return to its zero point. We find however, that if we fit a stop to the front equaliser shaft, the trouble which at present occurs when the swinging arm friction increases… | ||
| Scan077 | Tests carried out on a buffer stop for a servo balance lever to reduce clanking noises. | ||
| View original record | TESTS CARRIED OUT WITH BUFFER STOP APPLIED TO SERVO BALANCE LEVER TO SKETCH R.1966 This stop was designed to prevent the clanking of the servo levers when released. The first test proved that to use a… | ||
| Scan078 | Description of the function of a damper within the brake mechanism. | ||
| View original record | -2- This acts as a damper to all the leverages except the rear brake levers, and is not upset by any wear taking place in the brake mechanism. It not only quietens the clanking of the servo, but damps… | ||
| Scan079 | Cover note for an attached print concerning the clanking of a brake mechanism. | ||
| View original record | x7370. To R. From Hs/Rn. c. to SG. c. to Da. c. to By. OY. Hs/Rn4/AD15.10.29. X.7420 X.7370 X.5420 X.5370 For prints see original. CLANKING OF BRAKE MECHANISM. = Please find attached print mentioned… | ||
| Scan080 | Depot sheet detailing the standardisation of moulded asbestos brake linings for the Phantom II to reduce squeaking. | ||
| View original record | To Hm. From Hs/Rn. For Depot Sheet. X7370 Hs/Rn.4/MJ.2.1.30. Y X.7360 X.7420 X.7370 X.3409 BRAKES - PHANTOM II. In order to reduce the troubles of squeaking brakes we have standardised a moulded… | ||
| Scan081 | Issues with Ferobestos brake linings on the Phantom II, recommending a switch to Ferodo Bonded Asbestos for the rear brakes. | ||
| View original record | To BY. From Hs/Rm. C. to Da. X7370 Hs/Rm.4/MJ.6.2.30. X7370 X7360 X7420 X3409 PHANTOM II REAR FOOT BRAKE. In spite of the reduced direct braking leverage, we are finding that the total travel on the… | ||
| Scan082 | Seventh report of the Design Committee, discussing the hot well pump and modifications to the steering column. | ||
| View original record | R. (Held up). Sg. Hor. BY. Hs. X7370. Rg.1/LW.14.2.30. X.2924 X.2444 X.5430 X.8430 X.7370 SEVENTH REPORT OF DESIGN COMMITTEE. Hot Well Pump. The Design of the hot well pump required for the 'Hart'… | ||
| Scan083 | On a Phantom II brake servo failure due to disintegrating friction material. | ||
| View original record | Hs. EV. E. H. Woy D/BP X7370 EP11/H19.3.30. re. PHANTOM II. BRAKE SERVO FAILURE - 29-XJ. A complaint of the servo sticking on the above car was brought to my attention at N. by Br. on the 18th. inst.… | ||
| Scan084 | Material choices and fixing methods for clutches, referencing issues on the Phantom I and a 20-HP experimental car. | ||
| View original record | - 2 - EPYT/H19.3.30. Personally, I do not see so far what advantage we have had in changing from the material which was used on the Phantom I, although I admit the material used then had certain… | ||
| Scan085 | Phantom II brake servo failure, suggesting an increase in the dimension under the rivet head for the lining. | ||
| View original record | x7370 To BY. From Hs/Rn. Hs/Rn. 2/MJ. 20.3.30. PHANTOM 11 BRAKE SERVO FAILURE. EP. has produced a servo lining which has torn away from the plate (See EP.11/H19.3.30.). We are not very alarmed about… | ||
| Scan086 | Service bulletin addressing the issue of servo squeaks, its cause, and the prescribed remedy. | ||
| View original record | To Hm. From Hs/Rn. For Depot Sheet. n7370. Hs/Rn.6/MJ. 21.3.30. SERVO SQUEAKS. The S.S. servo is lined with a non-impregnated woven cotton lining. This is similar to the material used on the slipper… | ||
| Scan087 | Internal order request for Phantom II and 20 HP servo linings. | ||
| View original record | ROY. From Hs/Rn. x x7370 Hs/Rn. 2/WJ.5.4.30. v3035 x7370 x5370. Will you please order for us - four off G.77775, Phantom ll Servo Lining, and four off G.54030 20 HP. Servo Lining - in Ferodo Bonded… | ||
| Scan088 | Use of staples versus rivets for fixing Cotton-Duck servo linings on a 20 HP chassis. | ||
| View original record | X7370. To BY. From Hs/Rn. c. to BY/TWD. Hs/Rn. 2/MJ.22.5.30. X7370 20 HP. CHASSIS SERVO LININGS. With reference to BY12/G.21.5.30. The Cotton-Duck was run on the 20 HP. with normal rivets. We agree,… | ||
| Scan089 | Standardisation report on securing servo fabric with staples and adding a damper to stop servo clank. | ||
| View original record | RR 755 REVISED (IOH) (DP 537 4-1-29) BH. R/5943. X7370 COMPLETED 26. 8. 30. STANDARDISATION of CHASSIS PARTS. Description of Parts. SERVO FABRIC SECURED TO PRESSURE PLATES BY STAPLES IN PLACE OF… | ||
| Scan090 | Inconsistent friction load on a suspension bracket servo, caused by oil and paraffin contamination of the lining, with a proposed solution. | ||
| View original record | 87370 To Hs. From Hs/GWH. C By Hs/GWH2/AD10.9.30. 7370 73806 RE - SUSPENSION BRACKET (SERVO) G.78066/7. We have for some considerable time noticed that the friction load on the suspension bracket does… | ||
| Scan091 | Request to mill a groove in the outer pressure plate of the servo for the 24-EX model. | ||
| View original record | To RHC. From Hs/IAL. x7370 Hs/IAL.1/MJ.17.12.30. Please mill a groove .100" wide and .015" deep in the .625" internal dia. of the outer pressure plate of the servo on 24-EX. There is a similar groove… | ||
| Scan092 | The swapping of servo friction plates between two experimental chassis, 19-EX and 22-EX. | ||
| View original record | FOR FILES. C. For Rn. X7370 SERVO. 10.3.31. 19-EX. servo friction plates fitted with die pressed material is being taken off and refitted to 22-EX. 22-EX. servo friction plates fitted with cotton A.… | ||
| Scan093 | Standardization of ball bearing cams for the Servo on 40/50 HP and 25 HP models. | ||
| View original record | X7370. To By. from Hs/GWH. Hs/GWH.3/KT.20.10.31. Re. Ball Bearing Cams standardised for 40/50 HP. and 25 HP. for Servo. X7370. X5370. Please note that with the introduction of the above, the bijur… | ||
| Scan094 | Purchase and payment for two flying suits and two pairs of gloves. | ||
| View original record | O.O./Mr. Alvey. From Hs/Lov. 87370 Hs/Lov.2/MJ.16.11.31. x5370- We have obtained the following from Messrs. Milletts of St. Peter's Street Derby. :- Two Sidcat Flying Suits. Two pairs of gloves. These… | ||
| Scan095 | Query regarding the standardisation of cam face angles for Phantom II foot brakes. | ||
| View original record | HS 18/11/31 Hs. X7370. BY/Cgh.10/G.17.11.31. PHANTOM II - FOOT BRAKES. ------------------------- With reference to standardisation sheet X.7370 dated 26.9.31. in connection with the incorporation of… | ||
| Scan096 | Standardisation of servo operating levers and ball bearing cams for the chassis. | ||
| View original record | RR 78B (10M) (8459. 24-10-30) 6/3185. COMPLETED 4.4.32. STANDARDISATION of CHASSIS PARTS. Date 26.9.31 X No. 7370 Description of Parts. SERVO OPERATING LEVERS 43º BALL BEARING CAMS. Origin. To… | ||
| Scan097 | Introduction of a new part to a chassis series, including cost implications. | ||
| View original record | STANDARDISATION OF CHASSIS PARTS REASON for Introduction and objects obtained. Report on Test. The number of the-first chassis on which the new part will be fitted................ 'C' Series. Date… | ||
| Scan098 | Brake servo failures on the Phantom II due to bearing wear and proposing a new ball bearing design. | ||
| View original record | Y7370. R. from E. E.7/HP.25.5.32. x5370. c. Sg. Wor. Hs. By. re Brake Servo. From time to time we have had complaints of brake servos failing to operate satisfactorily, more particularly on Phantom II… | ||
| Scan099 | Page 2 of a memorandum discussing lubrication supply issues with a needle roller bearing and requesting feedback on a modification. | ||
| View original record | (2) E.7/HP.25.5.32. lubrication supply. We did try scheming in a needle roller bearing but found it did not leave sufficient room to get the oil by. We should be glad to have your remarks on this… | ||
| Scan100 | Trial and comparison of different materials for servo linings. | ||
| View original record | X7370 BY. from Hs/Rm. Hs/Rm.6/KT.9.9.32. X7370 X5370 X719. SERVO LININGS. We have tried fitting the Selvedge edge cotton duck linings to servos in the Expl. Dept, and are not at all satisfied with the… | ||
| Scan101 | Design, materials, and challenges of servo-assisted braking systems. | ||
| View original record | HS. E. By. } FROM R. X7370 R7/M14.9.32. C. to SG. WOR. PN. EP. SERVOS. X5370 I pointed out to HS., E., and RM., that we must not be too ambitious about getting the servo consistent and unchangeable… | ||
| Scan102 | Investigation into the failure of servo fabrics at the Cricklewood depot. | ||
| View original record | x7370 To Hd. from Hs/GWH. c. to Wor. Hs/GWH.8/KT.20.9.32. RE. FAILURES OF SERVO FABRICS. X5370. I have just paid a visit to Cricklewood to investigate the above trouble. It was not possible to trace… | ||
| Scan103 | New servo lining sample, Ferodo RAD.13, and recommendations for its implementation. | ||
| View original record | x7370 By. from Hs/Rm. Hs/Rm.3/KT.10.10.32. x719 x5370. We are issuing a standardisation sheet for the new servo lining sample of which you have already. It is called Ferodo RAD.13, and the Ferodo Co's… | ||
| Scan104 | Servo efficiency issues found during the dismantling of a servo on Chassis N.141. | ||
| View original record | Mx. from Hs/GWH. BY. Sft. X7370. Hs/GWH.3/KT.13.10.32. Re. SERVO EFFICIENCY. X5370. It is interesting to note that during the dismantling of the servo on Chassis N.141 just delivered from the Works to… | ||
| Scan105 | Previously designed servo system and related patent considerations. | ||
| View original record | HDY. } FROM R. BY. } HS. } x7370 R4/M7.11.32. C. to SG. WOR. RG. E. x5370 x728 re SERVOS. Y Some years ago I schemed a system whereby the servo was turned in one direction whichever way the car moved.… | ||
| Scan106 | Standardisation of a new type of servo lining for 20/25 & 40/50 chassis parts. | ||
| View original record | RR 755 (10H) (30405. R1-4-32) BM. 2/8282/4. COMPLETED 10.11.32. STANDARDISATION of CHASSIS PARTS. Description of Parts. NEW TYPE OF SERVO LINING FOR 20/25 & 40/50. Origin. To improve durability.… | ||
| Scan107 | Standardisation form for chassis parts detailing new part fitment and associated costs. | ||
| View original record | STANDARDISATION of CHASSIS PARTS The number of the first chassis on which the new part will be fitted...... When available Date when chassis will be handed to test...... --- Cost of scrapped material,… | ||
| Scan108 | Three design suggestions for a forward-only servo mechanism. | ||
| View original record | EX. FROM DA. x7370 DA7/M16.11.32. C. to SG. WOR. HS. E. SERVOS. X5370 We send herewith N.sch.3602. shewing 3 suggestions for arranging a servo so that it will only go in a forward direction whichever… | ||
| Scan109 | Modifications to servo fabrics and linings for Ferodo. | ||
| View original record | X7370. By. From Hs/Gry. Hs/Gry.5/MA. 22.11.32. SERVO FABRICS 40/50 AND 20/25. X.7370. X.5370. X.719. With regard to your discussion with Mx. about increasing the width of the dents in the Ferodo Servo… | ||
| Scan110 | Recommendation to adopt a .010' diametral clearance on all servo driving pins following a 10,000-mile test. | ||
| View original record | 87370. BY. from Hs/Rm. c. to RHC. Hs/Rm.19/KT.25.1.33. x5370. x4027. SERVO DRIVING PINS. We proved out on the last 10,000 miles on Peregrine that there was no detriment in having .010" diametral… | ||
| Scan111 | Standardisation of the Servo Motor Centre Ball Bearing on the Servo Bridge. | ||
| View original record | RR 755 (10M) (30405. 21-4-32) BM. 2/8382/4. COMPLETED 19.4.33. STANDARDISATION of CHASSIS PARTS. Description of Parts. SERVO MOTOR CENTRE BALL BEARING ON SERVO BRIDGE. Origin. To overcome binding of… | ||
| Scan112 | Standardisation form for a new chassis part. | ||
| View original record | STANDARDISATION of CHASSIS PARTS The number of the first chassis on which the new part will be fitted... 'P' Series. Date when chassis will be handed to test... Cost of scrapped material, if any...… | ||
| Scan113 | Requesting the issue of details for a 40/50 servo. | ||
| View original record | x f310. To By. from Hs/Gry. Hs/Gry.5/KT.16.10.33: 40/50 SERVO. We have had considerable success with the 20/25 servo to GL.609, and should be glad if you would issue details for a similar type servo… | ||
| Scan114 | Suggesting a change to the 40/50HP servo shaft lubrication scheme to a hand lubricator. | ||
| View original record | X7370 GWH See me Hs E Br from Mx. Mx4/T14.2.34. SERVO LUBRICATION We suggest that we bring 40/50HP in line with the 20/25HP and Bentley, in that we convert the lubrication scheme on the Servo Shaft to… | ||
| Scan115 | Standardisation of parts report for a fully floating servo. | ||
| View original record | RR 785 (SH) (52674, 16-10-33) RM. 3/262/6. COMPLETED 21.6.34. 40/50 STANDARDISATION OF PARTS. Description of Parts. FULLY FLOATING SERVO. Origin. To obtain maximum efficiency, no staples in the… | ||
| Scan116 | Estimated cost for extra jigs, tools, and equipment for the 'T' series chassis. | ||
| View original record | STANDARDISATION of PARTS Est. cost of extra jigs, tools and equipment (Sft/Ws.18.5.34) £36.0.0. Could be brought on to production at 1st chassis in "T" series, (Sft/GH.18.5.34) without scrap. | ||
| Scan117 | Experimental department report on a ball bearing for a brake system servo motor. | ||
| View original record | X7370 EXPERIMENTAL DEPARTMENT ' REPORT REFERENCE:— HS/TJH.10/KW.19.12.34. Subject of Report :— Ball Bearing Supporting Inner Pressure Plate on Brake System Servo Motor. General Conclusions :— From… | ||
| Scan118 | Experiments comparing a special bearing with an ordinary ball bearing in servo motors. | ||
| View original record | Hs/TJH.10/KN.19.12.34. Servo Experiments. On all the R.R. Servo Motors the ball bearing which supports the inner pressure plate in the main shaft is at present a special bearing with intentionally… | ||
| Scan119 | Graph comparing the hysteresis of special and ordinary ball bearings supporting the inner pressure plate of a Bentley & 25 HP servo. | ||
| View original record | HS 1661 HYSTERESIS OF BENTLEY & 25 H.P. SERVO COMPARISON OF SPECIAL & ORDINARY BALL BEARINGS SUPPORTING INNER PRESSURE PLATE CONDITIONS OF TEST. 1. SPRING RING TORSIONAL CONNECTION. 2. BALL BEARING… | ||
| Scan120 | Stamped page from the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE, LTD PRINT ROOM DEC 19 1934 DERBY. | ||