Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Negative effects of the vacuum feed system on engine performance and fuel consumption. | ||
| View original record | X5510 To Hs. from R. c. to CJ. BJ. c. to EP. Hm. c. to CWB. R7/M24.7.25. RE. VACUUM FEED. X.3579 X.5510 It has been pointed out that the vacuum feed both on the 20 HP. Silver Ghost and New Phantom,… | ||
| Scan002 | Investigations into vacuum feed, petrol economy, and fuel distribution issues on 40/50 and 20 HP models. | ||
| View original record | To Hs. from R. c. to CJ. PN. X5510 R2/M10. 8. 25 VACUUM FEED ON 40/50 X. 8510 AND 20 HP. X. 5510 I am anxiously awaiting the result of the investigations regarding vacuum feed to the 40/50. You will… | ||
| Scan003 | Vacuum feed performance on the 20 HP and New Phantom models, and suggesting carburetter improvements. | ||
| View original record | To hs. from R. c. to OJ. BJ. PN. c. to BY. EP. K5510 NEW PHANTOM & 20 HP. VACUUM FEED. R2/M11.8.25. X. 8510 E. 5510 We have carefully observed the behaviour of both the 20 HP. and the New Phantom as… | ||
| Scan004 | Potential causes of rich mixture in the vacuum feed tank and requesting data for a new design. | ||
| View original record | X5510 To Hs. from DA. DA3/M11.8.25. RE. VACUUM FEED TANK. X.8510 X.5510 Mr. Royce is very interested in the problem of the vacuum tank. Have you any more information you can send us? IF the cause of… | ||
| Scan005 | Standardisation of a special valve for the Autovac to improve slow running. | ||
| View original record | RR 755 (10H) (DB130 12-9-24) MS 301225 X5510 COMPLETED 26.5.26. STANDARDISATION of CHASSIS PARTS. Description of Parts SPECIAL VALVE FOR AUTOVAC. Origin. To reduce effect on slow running. Experimental… | ||
| Scan006 | Preventing petrol starvation on 20-HP models by ensuring the petrol pipe slopes downwards correctly. | ||
| View original record | X5510 W/W. Paris. (3 Copies). Bombay.(3 Copies). Madrid. Pt. - Australia. Wdr. BY. ER. Hs. Mr. Shaw. Mr. Trayner. L-Bassano. Hm's Dept. Hm. is absent. NRC10/D4.6.26. Petrol Starvation on 20-HP. It is… | ||
| Scan007 | Petrol leaks from the 20-HP Autovac drain plug and suggesting the use of aluminium washers. | ||
| View original record | c. Hs. X5510 EP3/H16.8.26. re. 20-HP. Autovac Drain Plug We have had trouble with petrol leaks from this drain plug, which have been overcome by further tightening up. I should be glad if you could… | ||
| Scan008 | Tests on Autovacs with Aluminium heads instead of brass heads for 40/50 and 20/25 HP chassis, noting a price difference and potential savings. | ||
| View original record | COPY. Hs/Roy/Ms. X5510. ROY/MS17/P6.6.30. 40/50 and 20/25 HP. CHASSIS AUTOVACS. X.5510. X.7510. We understand that BY. has asked you to carry out certain tests with Autovacs fitted with Aluminium… | ||
| Scan009 | The testing of a modified, larger self-draining float for the Autovac petrol feed system. | ||
| View original record | X5510. To R. from Hs/AJL. c. Sg. c. Wor. E. c. Ds. Ey. Mx. Hs/AJL1/AD.7.30. X3579 X7510 X5510 AUTOVAC PETROL FEED. Self Draining Float. As the result of our pointing out to the Autovac manufacturers… | ||
| Scan010 | Continuation of a report on an Autovac fuel system, recommending the adoption of a modification. | ||
| View original record | Hs/AJL1/AD4.7.30 contd. -2- via the leak in the bottom of the float. After the Autovac tank and the petrol had cooled down to atmospheric temperature the suction was again applied to the Autovac, and… | ||
| Scan011 | Following up on a recommendation to adopt the Autovac Company's self-draining float modification. | ||
| View original record | COPY. X5510. S/W. Wor. From PN. c. to Sg. c. to Hs. c. to MX. PN.5/WT28.7.30. X. 2579. X. 7510. X. 5510. Autovac Battery Feed Self-draining Float. 4.7 In the last par. of Hs/AJL/AD7.4.30. there is a… | ||
| Scan012 | The standardisation and production of an Autovac self-draining float. | ||
| View original record | Copy. X5510 Wor absent. X.3578. X.7510. X.5510. W/S. To PN. c. Hs. EWT/FG2/H.14.8.30. Re: AUTOVAC BATTERY FEED - SELF DRAINING FLOAT. ------------------------------------------ PN.5/WT28.7.30. A… | ||
| Scan013 | Standardisation of a self-draining autovac float with larger stem and vent holes. | ||
| View original record | RR 788 REVISED (10H) (DG 348 19-7-29) BM. 6/643. COMPLETED 1.9.30. X5510. STANDARDISATION of CHASSIS PARTS. Date 14.7.30. Description of Parts. SELF-DRAINING AUTOVAC FLOAT WITH LARGER STEM & VENT… | ||
| Scan014 | Standardisation of chassis parts concerning the reversion to reserve petrol supply in the main tank. | ||
| View original record | RR 785 (10H) (3-7-30) BM. 6/2571. X5510 COMPLETED 8.9.30. STANDARDISATION of CHASSIS PARTS. Date 21.7.30. Description of Parts. REVERSION TO RESERVE PETROL SUPPLY IN MAIN TANK AND DELETION OF RESERVE… | ||
| Scan015 | Standardisation of an Autovac top in aluminium to save cost and weight. | ||
| View original record | RR 755 REVISED (10H) (DG 348 19-7-29) SM. 6/543. COMPLETED 8.9.30. X5510 STANDARDISATION of CHASSIS PARTS. Date 28.6.30 Description of Parts. AUTOVAC TOP IN ALUMINIUM. Origin. Saving in cost and… | ||
| Scan016 | Instruction to replace suction pipe F.57678 with F.58328 on the 20/25 HP chassis due to a part failure. | ||
| View original record | REF. [crossed out] c. Hs/GWH. 85510. BY/HEB3/M.22.10.31. 20/25 HP. CHASSIS. AUTOVAC AND PIPING SEC:7140. Please receive herewith one Blue Print of:- F.58328 Suction Pipe(Autovac from Induction Pipe).… | ||
| Scan017 | Flexible petrol pipe connection for the 20/25 model, referencing print Lev.3864. | ||
| View original record | X5510 Rm F.Dodd. To Hs. from E/PSN. E/PSN.1/HP.29.3.34. c. By. RHC. Flexible Petrol Pipe - 20/25. We send you herewith a print of Lev.3864 showing the end connection for flexible petrol pipe from the… | ||
| Scan018 | Twin-cylinder shock absorber produced by the Delco Co. for Cadillac. | ||
| View original record | To R. From Hs. c.c. to GL. Wor. c.c. to Ev. K. c.c. to DA. HYDRAULIC DAMPERS. The Delco Co. have produced a twin cylinder shock absorber in many ways similar to the one we are about to produce. I have… | ||
| Scan019 | Patent situation and design considerations for shock dampers. | ||
| View original record | DA. BY. } FROM R. HS. (At Le Canadel.) X235 R1/M6.1.31. X.235. X.832. C. to SG. WOR. E. C. to Mr. CLAREMONT. SHOCK DAMPERS. THE PATENT SITUATION? ETC. (1) It would seem that we ought to have been able… | ||
| Scan020 | Technical memorandum detailing design considerations for piston slack, lubrication, and valve mechanisms, possibly for a damper. | ||
| View original record | (2) air vent is necessary but we shall still require the replacement valves. (C) We shew a method of keeping all the slack out of the piston and its cam without taking up headroom: here the spring… | ||
| Scan021 | Cure for noisy shock absorber valve springs by bending them. | ||
| View original record | X2 B51. Btn-1 January 7, 1931. STAMP: POST RECEIVED JAN 17 1931 STAMP: RECEIVED 1931 JAN 18 To: Mr. Soutter From: Mr. Burton Cc- Mr. Hives Re: Shock Absorber Valve Springs. We have found that the… | ||
| Scan022 | Modifications to the double piston shock damper, including lever clearance, valve size, and material specifications. | ||
| View original record | BY. FROM DA. X235 DA4/M10.1.31. C. to SG. HS. DOUBLE PISTON SHOCK DAMPER. We send herewith N. sch. 3195. shewing a slight modification to N. sch. 3190. to give better clearance to the lever. Since we… | ||
| Scan023 | Modification to a hydraulic shock damper design. | ||
| View original record | DA/HDY. E. } BY. HS. } FROM R. (At Le Canadel.) X235 R4/M1 5.1.31. C. to SG. WOR. HYDRAULIC SHOCK DAMPERS. I am not quite content with some of the details of our latest design of the above, and I shew… | ||
| Scan024 | Hand-drawn schematic of a mechanical assembly with various design annotations. | ||
| View original record | THIS CENTRE MUST BE CONCENTRIC. CAN BE ROUND OR SQUARE: IF SQUARE MUST BE RIVETED HENCE SCREW FROM BOTTOM ALTERNATIVE SCREWS ACCORDING TO UPPER PIN HAVING SQUARE OR ROUND ENDS 30° | ||
| Scan025 | Patent situation for shock dampers. | ||
| View original record | X235- R. Sg. c. Worr c. Hs. c. DT/NW. BY4/G. 20.1.31. X235. X832. SHOCK DAMPERS - RE PATENT SITUATION. RECEIVED 1931 JAN 20 With reference to R1/M6.1.31. the patent position is as follows :- 1/- Re… | ||
| Scan026 | Current position and value of hydraulic shock damper patents. | ||
| View original record | - 2 - 3/- Your views in paragraph (2) of R1/M.6.1.31. are confirmed by our present knowledge, that is, Houdaille, were not following your early design. 4/- We are unable at the moment to say whether… | ||
| Scan027 | Expressing doubt about a new single valve hydraulic shock damper and proposing a method for testing. | ||
| View original record | To BY. From Hs/Rm. c. to Wor. c. to RHC. ✓ 235 Hs/Rm.3/MJ.22.1.31. NEW HYDRAULIC SHOCK DAMPER. The new hydraulic damper to N.Sch.3190 incorporates no unknown factors except the single valve for the… | ||
| Scan028 | Requesting a dedicated test rig for intensive endurance testing of hydraulic shock absorbers. | ||
| View original record | 8235. To Wor. From Hs/Rm. c. to EJJ. Hs/Rm.4/MJ.26.1.31. X.235. EJJ.File. HYDRAULIC SHOCK ABSORBERS. In view of the seriousness of the position with regard to these fittings we think that it is… | ||
| Scan029 | Analysis of the Delco Lovejoy hydraulic damper and comparison to the original Phantom damper. | ||
| View original record | X2 35. To R. From Hs/Rm. c. to Sg. Wor. c. to De. E. c. to By. Hs/Rm.2/MJ.30.1.31. X83 X2 35. DELCO HYDRAULIC DAMPERS. We have been carrying out tests on one of the latest type Delco Lovejoy dampers… | ||
| Scan030 | Technical analysis and critique of a damper's design, focusing on venting, filtering, and valve operation. | ||
| View original record | -2- Hs/Rm.2/MJ.30.1.31.Contd (3) Venting. They allow an appreciable leak past the screw holding the two piston halves together, we have to confirm if this has any effect on the damper performance, it… | ||
| Scan031 | Technical analysis of valve and damper performance, focusing on leaks and pressure velocity factors. | ||
| View original record | -3- Hs/Rm.2/MJ.30.1.31. Contd. up to about 3 ft/sec. on the rear axle of a spring controlled passage in the shape of an annular leak of length .100 and various areas depending on the number of the… | ||
| Scan032 | Damper design, patent status, and testing, including road tests and a new double piston damper. | ||
| View original record | - 4 - blocking up the leaks being shewn on Sheet 3 where double the maximum pressure is reached in the same time with no more damping. SHORT DAMPER LEVERS. There appears to be little doubt that these… | ||
| Scan033 | Weight comparison table for Lovejoy and 20 HP Rear shock damper components. | ||
| View original record | SHOCK DAMPER WEIGHTS. Lovejoy & 20 HP. Rear. DETAILS WEIGHED. | LOVEJOY. | 20 HP. REAR ---|---|--- Cylinder only. | 7 lbs. 10 ozs. | 2 lbs. 12 ozs Cylinder only, complete with end cover, top cover,… | ||
| Scan034 | Blueprint showing graphs of deflection tests on hydraulic damper levers and arms under load. | ||
| View original record | SHEET I BENDING OF LEVER 1/1000" AT BALL END DEFLECTION MEASURED AT B DEFLECTION MEASURED AT A LOAD ON LEVER LBS OVAL SECTION REAR STRAIGHT SIDED SECTION REAR STRAIGHT SIDED SECTION FRONT LOVEJOY 12"… | ||
| Scan035 | Graphs and data tables showing variation in Delco loading with axle velocity for rear axle dampers. | ||
| View original record | SHEET 2. REAR AXLE DAMPERS. VARIATION IN DELCO LOADING WITH AXLE VELOCITY. VALVES 3G. G.2. STROKES 2"-4" 12" LEVER. 1680.4" STROKES Top Graphs & Tables: Graph 1 (High Press.) Y-axis: 450 R.P.M., 300… | ||
| Scan036 | Series of performance diagrams for a Delco damper under various test conditions. | ||
| View original record | SHEET IV DIAGRAMS DELCO DAMPER. MAIN LEVER 7.5". INTERMEDIATE LEVER 1.350". --- Top Left Diagram: "DELCO" LOW PRESSURE. AS DELIVERED STANDARD LOVEJOY OIL 450 R.P.M. 1" STROKE AXLE VEL 1.25 FT/SEC MEAN… | ||
| Scan037 | Graph showing the variation in performance with temperature for a Delco Damper. | ||
| View original record | SHEET V VARIATION IN PERFORMANCE WITH TEMPERATURE DELCO DAMPER. AXLE VELOCITY .75 FT/SEC STROKE 4" LOW PRESSURE OIL TEMP 20°C. MEAN BALL PIN LOAD 29.2 MAX. BALL PIN LOAD 33.0 LBS. OIL TEMP 67°C MEAN… | ||
| Scan038 | Performance variation with speed for a Delco damper, shown through graphs and data tables. | ||
| View original record | SHEET VI VARIATION IN PERFORMANCE WITH SPEED DELCO DAMPER Top Chart: 154 LBS/SQ" OIL PRESS BALL PIN VEL | MAX PRESS | M.E.P. .75 | 33 | 29.4 | A 1.08 | 38.4 | 33 | B 1.50 | 52.5 | 43.8 | C Chart… | ||
| Scan039 | Graph plotting the variation of maximum ball pin load against axle velocity for a 7.5 inch lever under various conditions. | ||
| View original record | SHEET VII VARIATION OF BALL PIN LOAD WITH AXLE VELOCITY 7.5" LEVER VALVES 2G. G4. MAXIMUM BALL PIN LOAD 500 400 300 200 100 0 LONG STROKES HIGH PRESSURE SHORT STROKES HIGH PRESSURE LONG & SHORT… | ||
| Scan040 | Blueprint diagram for a Lovejoy Piston, detailing its components and features. | ||
| View original record | [ "DIAGRAM LOVEJOY PISTON", "SHEET 8.", "7.500", "1.350", "2.40"", "REPLENISHING PASSAGE.", "NURLED & PRESSED IN.", "TWO HALVES OF PISTON INTERCHANGE", "SCREW HEAD LOCKED BY INDENTATIONS", "NOT… | ||
| Scan041 | Chart and diagram detailing 'Delco' lever deflection test results. | ||
| View original record | SHEET X. "DELCO" LEVER DEFLECTION TESTS. 12" LEVER PISTON STOP AT L.P. END. DEFLECTION. INS. .080 .060 .040 .020 LOADS ON LEVER. LB. 20 40 60 80 100 120 C. B A B-A C-B CLOCKS FIXED TO THIS BAR CLOCK… | ||
| Scan042 | Instructions for fitting hydraulic dampers with specified pressure loads and valve drilling. | ||
| View original record | W. Bell.from Rm. X-35. Hs/Rm.4/ME.4.2.31. K663. HYDRAULIC DAMPERS. - 20 EX. Will you please fit up dampers on this car, fron and rear with the following loads:- High pressure - 115. Low pressure - 90.… | ||
| Scan043 | Dissatisfaction with current shock absorbers, customer complaints, and proposed modifications for improvement. | ||
| View original record | To R. From Hs. c. Sg. Mor. E. c. Da. By. 8235 Hs.2/KT.6.2.31. X. 235. X. 7520. X. 5520. SHOCK ABSORBERS. We are not satisfied with the present position of shock absorbers, although we can look forward… | ||
| Scan044 | Issues and proposed modifications for front shock absorbers on the Phantom II model. | ||
| View original record | -2- The front shock absorber on the P.II. unfortunately does not lend itself easily to fit the split piston. We hold a view that on any future design we ought to have one type of shock absorber only… | ||
| Scan045 | Concerns over a new shock absorber design with a dashboard hand control and proposing modifications. | ||
| View original record | To Da. From Hs. c. to Wor. x235. Hs.11/KT.6.2.31. SHOCK ABSORBERS. We are rather concerned by the fact that the new design of shock absorbers is tied up with a hand control from the dashboard. As this… | ||
| Scan046 | Blueprint of a mechanical component with three views and a list of its features. | ||
| View original record | FEATURES 1 ALL VALVE SEATS HORIZONTAL 2 VALVES ACCESSIBLE 3 MINIMUM AMOUNT OF DRILLING MAXIMUM SIMPLICITY OF HOLES 4 VALVE CHAMBERS VENT ONE INTO THE OTHER AND INTO MAIN CHAMBER. HENCE BY GROOVE IN… | ||
| Scan047 | Blueprint drawing showing multiple views and a cross-section of a mechanical component, with a handwritten list of its features. | ||
| View original record | Features. 1. All valve seats horizontal 2. Valves accessible. 3. Minimum amount of drilling Maximum simplicity of holes 4. Valve chambers vent one into the other and into main chamber, hence by groove… | ||
| Scan048 | Blueprint for an intermediate lever for use with a Lovejoy type piston in an SS damper. | ||
| View original record | INT. LEVER FOR USE WITH LOVEJOY TYPE PISTON IN SS DAMPER ALL OTHER PARTICS. TO F82742 EX5760 .750 .050R AROUND EDGES 2.000 +.5 -1 1.075 DIA +.5 -.5 0º 0' +4' -4' .250RAD .600 +.0 -.5 STAMPED: LIMITED… | ||
| Scan049 | Drawing of a Love Joy type piston for an SS rear shock damper. | ||
| View original record | EX5759 .750R NOTE. THIS PIECE IS EXACTLY AS THE MODEL EXCEPT FOR DIMSN. SHOWN, AND SLIGHT MODIFICATIONS TO REDUCE MACHINING WHEN PRODUCING FROM SOLID (REAR END) LOVE JOY TYPE PISTON FOR SS REAR SHOCK… | ||
| Scan050 | Blueprint for a Lovejoy type piston for an SS rear shock damper. | ||
| View original record | EX5758 .750 RAD NOTE! THIS PIECE IS EXACTLY AS THE MODEL EXCEPT FOR DIMSN. SHOWN AND SLIGHT MODIFICATIONS TO REDUCE MACHINING WHEN PRODUCING FROM SOLID (FRONT END) LOVEJOY TYPE PISTON FOR SS REAR… | ||
| Scan051 | Blueprint for a lever for a hydraulic shock damper. | ||
| View original record | SECTION AA .250 RAD 1.300 .675 2.000 DIA 1.250 RAD 1.000 1.500 DIA .050 @ 45° 1.095 SERRATED TO SUIT MODEL DIA Nº OFF :- 1 MAT:- S/M. BRIN. 150-180 LEVER FOR HYD. SHOCK DAMPER 13.000 ± .25 1.250 RAD… | ||
| Scan052 | Blueprint for a rocking shaft for a hydraulic shock damper. | ||
| View original record | ROCKING SHAFT HYD SHOCK DAMPER TO REPLACE F80337 MAT - S/ZN N° OFF - 2 EX5763 SERRATIONS SIMILAR TO MODEL Dimensions: 4.750 ±10 3.875 ±10 2.975 ±10 2.575 ±5 2.050 ±10 .200 RAD +5 .025 @ 45° +10 .74975… | ||
| Scan053 | Blueprint showing multiple views of a piston and connecting rod assembly. | ||
| View original record | ROLLS-ROYCE, LIMITED. INDEX ROOM 6 FEB 31 | ||
| Scan054 | Design proposal for hydraulic dampers and front axle control, including sketches and material suggestions. | ||
| View original record | DA. HS. ) FROM R. E. BY. ) (At Le Canadel.) C. to - SG. WOR. C. to - HY. RHC. X235 R1/M7.2.31. HYDRAULIC DAMPERS. FRONT AXLE CONTROL. I have all along fought for shorter levers, but the circumstances… | ||
| Scan055 | The design, placement, and patenting of shock dampers and relief valves. | ||
| View original record | (2) Experience has proved that we must place these dampers so that they are more accessible. I think the front ones on P. 2. were put inside because they would have reduced the lock - i.e. we did not… | ||
| Scan056 | Design and principles of shock dampers. | ||
| View original record | HS/RM. DA/HDY. BY.) FROM R. X235. (AT Le Canadel.) C. to SG. WOR. E. C. to HY. RHC. SHOCK DAMPERS. I want to warn us that we must not follow Lovejoy's without a real reason. One cannot see any reason… | ||
| Scan057 | Design considerations for valves, shock dampers, and other vehicle components. | ||
| View original record | (2) It is agreed that knife edge seatings are good for valves (replenishing) because less liable to get dirty, and large balls with small lift also good. I prefer vertical motion, but appreciate and… | ||
| Scan058 | Design and development of Delco hydraulic shock absorbers and the challenges involved. | ||
| View original record | To R. From Hs/Rm. c.c. to Sg. c.c. to WOr. c.c. to Da. ~35. Hs/Rm.1/KT.11.2.31. HYDRAULIC SHOCK ABSORBERS. X. 235. X. 832. At the same time as we are sending you the sectioned Delco horizontal… | ||
| Scan059 | Impending modifications to shock dampers, advising a halt on finishing parts. | ||
| View original record | Sft c. Hs/Rm. c. BY/HFD K255. BY22/G.11.2.31. RECEIVED 1931 FEB 11 It would appear that we are likely to have to introduce modifications to the shock dampers in the near future, judging from… | ||
| Scan060 | Endurance testing and load settings for improved Phantom II shock absorbers. | ||
| View original record | W.Bell. From Hs/Rn. X-35 Hs/Rn. 2/MJ.11.2.31. IMPROVED PHANTOM II SHOCK ABSORBERS. X.7520. X.235. The great urgency with these at the moment is to get them through an endurance test. We should set the… | ||
| Scan061 | Programme for modifying hydraulic dampers and front axle control on the Phantom II model. | ||
| View original record | 8235 To Ds. From Hs/Rn. c. to E. c. to Sg. c. to Wor. Hs/Rn.1/WJ.12.2.31. HYDRAULIC DAMPERS & FRONT AXLE CONTROL. We note from R.1/M7.2.31 that R. is in agreement with putting a split piston in the… | ||
| Scan062 | Torque control, damper design for the 25 HP and Phantom II, and future damper proposals. | ||
| View original record | -2- Hs/Rn.1/WJ.12.2.31.Cont'd. The ball end at the top of the torque control allowing three or four degrees spring controlled movement to take care of the quarreling occasioned by the short arm. We… | ||
| Scan063 | New, simpler shock damper design to address noise and ineffectiveness complaints. | ||
| View original record | To R. From Hs/Rm. c.c. to Sg. Wor. E. c.c. to Da. Hdy. RHC. c. to Hy. /235. Hs/Rm.1/KT.1C. 2.31. SHOCK DAMPERS. ---------------- With reference to R.2/M.10.2.31., attached is a sketch of a damper… | ||
| Scan064 | Blueprint showing three views and a list of design features for a hydraulic damper component. | ||
| View original record | FEATURES 1 ALL VALVE SEATS HORIZONTAL 2 VALVES ACCESSIBLE 3 MINIMUM AMOUNT OF DRILLING MAXIMUM SIMPLICITY OF HOLES 4 VALVE CHAMBERS VENT ONE INTO THE OTHER AND INTO MAIN CHAMBER, HENCE BY GROOVE IN… | ||
| Scan065 | Design, cost, and potential improvements for hydraulic dampers. | ||
| View original record | DA. HS. FROM R. (At Le Canadel.) C. to SG. WOR. C. to E. BY. re. HYDRAULIC DAMPERS. X235 HS/RM. sends suggestions for a design very like the Lovejoy but I think it could do with some modification and… | ||
| Scan066 | Technical notes discussing design considerations for hydraulic system components like glands, bearings, shafts, and valves. | ||
| View original record | (2) the ends of long stroke 4". We do not quite agree but after this speed of say 60 at 4" there should be as little increase in ball pressure as possible as so as not to get excessive forces on the… | ||
| Scan067 | Performance of shock dampers, spring deflection, and a comparison with Delco-Lovejoy dampers. | ||
| View original record | HS. DA. FROM R. (At Le Canadel.) X235 C. to SG. WOR. C. to E. BY. re. SHOCK DAMPERS. R2/M23.2.31. X. 235. X. 832. X. 7520. X. 5520. Under the conditions of bad roads we do not like the 10" deflection… | ||
| Scan068 | Technical analysis comparing lever and shaft dimensions and a critique of the Delco damper design. | ||
| View original record | (2) (4) The levers in these models are about 7.5" long. We are working with 13". It would seem that we must get down to 10" and some limit on rebound. (5) When we made ours we had no thought of 100 to… | ||
| Scan069 | Copy of a telegram regarding an unsatisfactory damper design. | ||
| View original record | W/Cdr. Sg. from Wor. Hs. X-235. Wor10/T.24.2.31. We give below copy of telegram received from R. to-day:- " DAMPER DESIGN NOT YET SATISFACTORY THEREFORE WASTE NO MONEY UNTIL THEY ARE IMPROVED SEE… | ||
| Scan070 | Technical note with diagrams discussing the design of double piston shock dampers. | ||
| View original record | DA/HDY. } FROM R. HS/RM. } (At Le Canadel.) BY. C. to SG. WOR. E. 7235 RI/M24.2.31. SHOCK DAMPERS. X235 The double piston that I suggested is not so good or simple as the Delco design because it… | ||
| Scan071 | Design considerations for various mechanical components, including shafts, bearings, lubrication and valves. | ||
| View original record | (2) If this die was broached with the same broach as the lever the parts would fit and naturally be tight; if not it could be arranged. We should never expect to take out pistons or shaft although it… | ||
| Scan072 | Design competition and a concept for a serrated broach tool. | ||
| View original record | (3) It would seem that we are drifting away from needing my sch. for damping control but it might be wise to keep it going on some model because if at all good it would be a fine selling point, and… | ||
| Scan073 | Design considerations for hydraulic dampers. | ||
| View original record | DA/HDY. } FROM R. HS/RM. } (At Le Canadel.) BY. X235 C. to SG. WOR. E. HYDRAULIC DAMPERS. R1/M25.2.31. I think we ought to know what we intend to make for our general production. It must be one model… | ||
| Scan074 | Design modifications for a damper mechanism, including material choice and spring specifications. | ||
| View original record | (2) Since writing my last para. I have schemed that we might make the back bearing blind and of large dia. say 1.1, the fine parallel serrations 1.25 and the front bearing 1.1, the so that even if the… | ||
| Scan075 | Technical memorandum discussing the design and manufacturing of hydraulic dampers, with diagrams. | ||
| View original record | DA/HDY. } FROM R. HS/RM. BY. } (At Le Canadel.) Copy to SG. WOR. E. 8235. R1/M26.2.31. HYDRAULIC DAMPERS. (CONTINUED.) X235 We must do something very quickly and the simplest thing we can do is to put… | ||
| Scan076 | Observations on the re-design of horizontal type hydraulic dampers. | ||
| View original record | R. FROM DA/HDY. X235 DA/HDY1/M26.2.31. Copy to - HS. HYDRAULIC DAMPERS. With reference to H1/M7.2.31., and the proposed re-design of the horizontal type dampers we give below our observations.… | ||
| Scan077 | High-speed chassis damping, rebound control, and front axle control, including a small diagram. | ||
| View original record | (2) DAMPING OF SLOW CHASSIS MOTION AT HIGH SPEED. It appears to us that with a damper of the uniform load type whenever the velocity of the axle vibrations is greater than that of the chassis on its… | ||
| Scan078 | Blueprint analyzing suspension damper motion, phase relationships, and effectiveness under different conditions. | ||
| View original record | DAMPING CHANGES OVER AT PEAKS OF CURVE MAX. VELOCITY OF AXLE 2.0 FT SEC CHASSIS .70" ASSUMING S.H.M. THE AXLE MOTION PARTICULARLY WILL BE SOMEWHAT DIFFERENT FROM S.H.M. DAMPER MOTION AT TWO DIFFERENT… | ||
| Scan079 | Design of shock dampers, with a diagram, recommending the use of a 4-stud cover. | ||
| View original record | DA/HDY. } FROM R. HS/RM. } (At Le Canadel.) BY. _____ C. to SG. WOR. E. X238 R1/M27.2.31. SHOCK DAMPERS. (CONTINUED.) After thinking for a long time weighing the value of screwed plugs, ring nuts, and… | ||
| Scan080 | Requesting a rough drawing of a suggestion for hydraulic dampers to be submitted for criticism. | ||
| View original record | DA/HDY. FROM R. (At Le Canadel.) Y 235 R3/M2.3.31. C. to SG. WOR. C. to HS/RM. HYDRAULIC DAMPERS. I shall hope to see a rough drawing of the best you can make of the suggestion I have sent, and your… | ||
| Scan081 | Design policy for shock dampers, considering a revised design versus a completely new one. | ||
| View original record | BY. HS. FROM DA. X238 DA2/M2. 3. 31. C. to SG. WOR. HY. P. 2. SHOCK DAMPERS. X7520 X235 we are in some doubt as to the policy in connection with the above. We have sent you a spring loaded piston, and… | ||
| Scan082 | Material choices and hardness for Delco shock absorber pads. | ||
| View original record | To R. From Hs/Rn. c. to Da/Hdy. c. to By. c. to Sg. c. to Wor. c. to E. SHOCK DAMPERS. With reference to RL/M24.2.31. We note that you refer to Kelmet pads in the Delco shock absorber piston and axle… | ||
| Scan083 | Development and application of the P.2 split piston shock damper. | ||
| View original record | To Da. From Hs/Rm. By. c. to Wor. X235. Hs/Rm.6/KT.4.3.31. SHOCK DAMPER P.2. X.7520. X.235. With reference to Da.2/M2.3.31. The only one of the existing dampers in which the split piston can be… | ||
| Scan084 | Suggestions for immediate production modifications to hydraulic dampers based on service complaints. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Wor. c. to DA/HDY. By c. to E. 8235. Hs/Rm.7/KT.4.3.31. HYDRAULIC DAMPERS. With reference to R.1/M.25.2.31. We make the following suggestions for immediate production. We… | ||
| Scan085 | Damper complaints and a proposal for a Delco damper with a new piston design. | ||
| View original record | - 2 - Hs/Rm.7/KT.4.3.31.C fully explored its virtues. We may find the remote control too good to neglect. It must be remembered that Springfield have no complaints as to the ride they can get with the… | ||
| Scan086 | High-speed braking tests, car sway, and a comparison with adjustable Delco shock absorbers. | ||
| View original record | To. R. From Hs/An. c. to Sg. Wor. c. to E. Da. c. to BY. 8235 Hs/An.3/MJ.6.3.31. HYDRAULIC SHOCK ABSORBERS. X.235. X.4612. We have been doing some high speed braking tests with the ribbed brake drums… | ||
| Scan087 | Design choices and development strategies for hydraulic dampers. | ||
| View original record | DA/HDY. ) FROM R. HS/RM. ) (At Le Canadel.) BY. X235 RL/M6.3.31. C. to SG. WOR. HYDRAULIC DAMPERS. Mr. Hardy writes some excellent remarks but like my own they may not prove as beneficial as they… | ||
| Scan088 | Front damper and axle control issues, including lever sizes and component scaling for different vehicle weights. | ||
| View original record | (2) Regarding the difficulty with the front dampers and the axle control I must leave this until I see the best we can make of it. 7" to 8" levers seem to be the minimum. The spring b~~a~~lls could do… | ||
| Scan089 | Proposed programme for P.2. shock dampers, including design choices and fitting them to a 25HP car. | ||
| View original record | HS. FROM DA. X235 DA2/M6.3.31. P. 2. SHOCK DAMPERS. X.7520. X.235. Referring to HS/RM6/KT4331., and HS/RM7/KT4331., we agree to the programme you propose. We understand that you do not want the… | ||
| Scan090 | Developments and patents related to hydraulic shock dampers for the 18-EX car. | ||
| View original record | HS/RM. ) FROM R. DA/HDY. } EY X235 R2/M7.3.31. C. to SG WOR. E. C. to PN. EP. HYDRAULIC SHOCK DAMPERS. 18-EX. X.235. X.8992. In accordance with Derby instructions Dodd has increased the spring… | ||
| Scan091 | Alternative, lighter method for making a spring-loaded piston for shock dampers. | ||
| View original record | BY. FROM DA. X235 C. to HS. P. 2. SHOCK DAMPERS. DA1/M7.3.31. x.7520. X.235. Herewith we send N. sch. 3251. shewing the spring loaded piston as instructed in R1/M24231. We shew an alternative method… | ||
| Scan092 | Proposal to use cast iron for a piston instead of Phosphor Bronze for reasons of economy. | ||
| View original record | To Da. From Hs/Rm. Y 235. Hs/Rm.2/MJ.9.3.31. +7520. +235. We thank you for your note Da2/M6.3.31. We shall submit the 20 HP. car to you as soon as ever possible. We note that on N.Sch.3251 you shew a… | ||
| Scan093 | From Robotham to Day regarding the N. Scheme damper programme and a request for hardened steel inserts. | ||
| View original record | X235. Huy 9.3.31. Day. Camacha. West Wittering. Agree we concentrate on N. Scheme 3251 for present damper programme. Want hardened steel inserts for rubbing surfaces. Robotham. | ||
| Scan094 | Use of cast iron for a shock damper piston. | ||
| View original record | X235 HS/RM. FROM DA. DA3/M1.3.31. SHOCK DAMPERS. X.7520. X.235. Replying to HS/RM2/MJ9331., we quite agree that the piston should be tried in cast iron. DA. | ||
| Scan095 | Recommending a halt in the production of hydraulic shock absorbers until improvements are available. | ||
| View original record | Y 235. To By. From Hs/Rm. c. to Wor. Hs/Rm.5/KT.13.3.31. HYDRAULIC SHOCK ABSORBERS. Schemes are now in hand to make the existing shock absorbers free from complaints. Under the circumstances we… | ||
| Scan096 | The state of flux in designing hydraulic shock dampers for the 20/25 HP model. | ||
| View original record | RECEIVED 1931 MAR 18 Hs/Rm. γ 235. BY3/G.17.3.31. HYDRAULIC SHOCK DAMPERS. -------------------------- H: If there are really tangible schemes available we would like to employ them at once on the… | ||
| Scan097 | Casting, materials, and design specifications for a new hydraulic shock damper piston. | ||
| View original record | DA/HDY. ) FROM R. HS/RM. ) (At Le Canadel.) C. to SG. WOR. C. to HY. RHC. E. 8235. R3/M17.3.31. HYDRAULIC SHOCK DAMPERS. I wired Derby that the new damper piston was not good enough yet because it was… | ||
| Scan098 | Technical notes on shock damper design, materials, and associated components. | ||
| View original record | (2) Referring to the leak past the valve, I think we ought to agree that this should be plain round hole of some size that can be easily produced, and not alterable, because I have often pointed out… | ||
| Scan099 | Secret memo detailing revisions to a shock-damper piston. | ||
| View original record | X235 TO R. FROM DA. SECRET DA9/EV.21.3.31. COPY TO SG. WOR. Hs. SHOCK-DAMPER PISTON. BY. HY. We send herewith N.Sch.3262 shewing the piston revised in accordance with R3/M.17.3.31. We have shewn the… | ||
| Scan100 | Producing improved shock absorbers by reproducing Delco parts for the Phantom II model. | ||
| View original record | To RHC. From Hs/Rm. x235. Hs/RM.3/KT.23.3.31. IMPROVED SHOCK ABSORBERS. X.235. X.7520. We now have details issued from the D.O. of parts designed by W.W. to reproduce the Delco split piston etc. We… | ||
| Scan101 | Design modifications for a revised horizontal shock damper. | ||
| View original record | X235. R. from Da/Hdy. c. Hs/Rm. Da/Hdy1/M24.3.31. REVISED HORIZONTAL SHOCK DAMPER. X.235. Herewith we send a preliminary print of the revised horizontal damper. The dimensions do not agree with those… | ||
| Scan102 | Fixed leak and a variable form of leak for experimental work. | ||
| View original record | Da/Hdy1/M24.3.31 contd. -2- A fixed leak is provided but we also show a form of leak which lends itseld to the ready variation which is needed in experimental work. Da/Hdy. | ||
| Scan103 | The incorporation of cast iron ends with knife-edged valve seats into shock absorbers. | ||
| View original record | K235. To RHC. From Hs/Rm. Hs/Rm.7/MJ.24.3.31. X7520. Further to Hs/Rm.3/KT.23.3.31. We wish to incorporate in these shock absorbers cast iron ends carrying the valves having knife-edged seats. You… | ||
| Scan104 | Design review memo for hydraulic shock dampers with annotated sketches. | ||
| View original record | DA/HDY. ) FROM R. HS/RM. (At Le Canadel.) X235 R2/M3. 4.31. HYDRAULIC SHOCK DAMPERS. We have still not mastered this design to promise lasting satisfaction and ease of manufacture. (1) I cannot see… | ||
| Scan105 | Design improvements for hydraulic shock dampers. | ||
| View original record | DA/HDY. ) FROM R. HS/RM. ) (At Le Canadel.) BY. ) X235 Copy to SG. WOR. HYDRAULIC SHOCK DAMPERS. I suggest that we might fix the cyl. at an angle so as to get all the air to one end where we could let… | ||
| Scan106 | Proposed new single-valve design for shock dampers. | ||
| View original record | DA/HDY. E.) FROM R. 8235. R4/M9.4.31. BY. HS.) (At Le Canadel.) Copy to - SG. WOR. SHOCK DAMPERS. I am still hoping to send you a better design of piston. One must agree that the single valve (double… | ||
| Scan107 | Design, testing, and production plans for new hydraulic shock absorbers. | ||
| View original record | From Hs/Rn. x. Nor. By. Da. to E. Hs/Rn.7/WJ.14.4.31. HYDRAULIC SHOCK ABSORBERS. X.235. X.7520. We note that in a recent memo. re. Quarterly complaints you asked the position of shock absorbers. The… | ||
| Scan108 | With sketches discussing design options for a piston assembly in hydraulic shock dampers. | ||
| View original record | DA/HDY } FROM R. HS/RM. } (At Le Canadel.) Y 235. R1/M14.4.31. C. to - SG. WOR. C. to - E. BY. HYDRAULIC SHOCK DAMPERS. My work on these gets crowded out. I am arranging that the piston should be held… | ||
| Scan109 | Modifications to hydraulic shock damper pistons and the problem of trapped air. | ||
| View original record | X2-35 R. FROM DA/HDY. DA/HDY1/M14.4.31. Copy to - HS/RM. HYDRAULIC SHOCK DAMPERS. We send herewith print of N. scheme 3266. shewing the piston for the damper with the modifications instructed in… | ||
| Scan110 | Blueprint with cross-sections and handwritten notes for a modified damper piston. | ||
| View original record | NSM 3266 MAKE DRAW THE MINIMUM THAT CAN BE USED FOR MACHINE MOULDING. WE SHOW 1° THE FLAT FACE HAS TO BE PROVIDED IN ADDITION TO THE THREE BOSSES TO PREVENT ROTATION OF PISTON THE THREE HOLES ARE THE… | ||
| Scan111 | Preliminary print for a double acting valve on a revised horizontal shock damper. | ||
| View original record | X235 HS. FROM DA/HDY. DA/HDY2/M14.4.31. C. to SG. WOR. BY. SHOCK DAMPERS. With reference to R4/M9.4.31. we send herewith a,preliminary print of N. sch. 3264. which shews the double acting valve… | ||
| Scan112 | Modified damper piston design for shock absorbers. | ||
| View original record | X235C' BY. FROM DA/HDY. C. to SG. WOR. HS. SHOCK DAMPERS. DA/HDY1/M1 5. 4. 31. We send herewith print of N. sch. 3266., damper piston modified to R2/M3.4.31. This design is for use on the existing… | ||
| Scan113 | Design improvements and cost-saving measures for a horizontal damper. | ||
| View original record | [Handwritten top]: X235. To Da/Hdy. From Hs/Rm. c. to Sg. Wor. c. to Fy. Hs/Rm.5/KT.17.4.31. [Handwritten right]: X-235 XJ520. HORIZONTAL DAMPER. With reference to N. sch. 3264. We suggest that it… | ||
| Scan114 | Design and manufacturing considerations for a horizontal damper. | ||
| View original record | X235. Hs/Rm. from Da/Hdy. c. Sg. Wor. c. By. Da/Hdy1/M22.4.31. HORIZONTAL DAMPER; X. 235. We thank you for your Hs/Rm5/KTb7.4.31. We agree that the solid ended cyl. is likely to be cheaper and is of… | ||
| Scan115 | Continued memorandum discussing the performance and reliability of Delco dampers. | ||
| View original record | Da/Hdy1/M22.4.31 contd. -2- With regard to Delco dampers these may prove to be 100% as you suggest but we certainly have not yet had sufficient experience to know that they are. We know from… | ||
| Scan116 | Two alternative piston modifications for shock dampers, seeking a manufacturing preference. | ||
| View original record | BY. FROM DA. X235 C. to SG.. HS. SHOCK DAMPERS. DA4/M23.4.31. Herewith we send N. sch. 3268. shewing the piston modified in accordance with R1/M14.4.31. We have shewn the first two alternatives,… | ||
| Scan117 | Suggestions to improve a vacuum mechanism, focusing on the piston, jaws, and an epicyclic unit. | ||
| View original record | Hs. Da. ) FROM R. E. Bv. ) (At Le Canadel) c. Sg. Wor. X235. R2/M24.4.31. DOUBLE TOP. X. 235 I telegraphed a suggestion to meet the imperfections found in experimental tests. I have not the drawing of… | ||
| Scan118 | Gearbox design, suggesting replacing Maybach components and referencing Mercedes and Voisin systems. | ||
| View original record | R2/M24.4.31 contd. -2- The gearbox can be just an ordinary 3 speed box, but anyway I should delete the Maybach jaws and fit ordinary ones. One feels it is the best scheme we know of both for handiness… | ||
| Scan119 | Drawing of a shock damper with a double-acting valve, noting design changes and machining economies. | ||
| View original record | BY. FROM DA. C. to SG. HS. HY. SHOCK DAMPERS. DA2/M28.4.31. Herewith we send N. sch. 3264. shewing the shock damper with the double acting valve as instructed in R4/M9.4.31. It will be seen that we… | ||
| Scan120 | Cost-effectiveness of producing Delco hydraulic dampers compared to the current R.R. dampers. | ||
| View original record | Y235. To Wor. From Hs/Rm. Hs/Rm.8/KT.4.5.31. HYDRAULIC DAMPERS. X.235. X.7520. Attached is N. Sch.3264. You have already had a copy of our Hs/Rm.5/KT.17.4.31. and the reply Da/Hdy.1/M22.4.31. In the… | ||
| Scan121 | Approval, progress, and production of a revised shock damper with a double acting valve. | ||
| View original record | DY. } FROM DA. X235 HS. } DA1/M6. 5. 31. Copy to - HY. SHOCK DAMPERS. R. has approved of N. sch. 3264. - the revised damper with the double acting valve. We understood when HS. was down here last week… | ||
| Scan122 | Instructions and the acquisition of parts for testing Delco R.R. shock absorbers. | ||
| View original record | X235. To RHC. From Hs/Rm. c. to wor. GWH Hs/Rm.2/KT. 6. 5. 31. X.832. X.7520. X.5520. X.235. DELCO R.R. SHOCK ABSORBERS. We now have complete instructions from the D.O. for reforming our shock… | ||
| Scan123 | Up-to-date conversion designs and new production designs for hydraulic dampers. | ||
| View original record | X235. Hs. Hy. } FROM R. Da. c. Sg. Wor. c. PN. E. c. Hy. RHC. R1/M12.5.31. HYDRAULIC DAMPERS. These are now brought up-to-date by conversion designs for existing dampers. (Personally I have never… | ||
| Scan124 | Tests conducted on a double damper valve to resolve flutter and bounce issues. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Wor. c. to Da. E. c. to By. Hy. X235. Hs/Rm. 5/KT.12. 5. 31. SHOCK DAMPERS. With reference to Dal/M6.5.31. We have been carrying out tests on the double damper to N. sch.… | ||
| Scan125 | Improvements to a damper by modifying the syphon tube and valve, referencing various performance diagrams. | ||
| View original record | - 2 - and the internal bore of the syphon tube to .010" and endeavoured to make it act as a dash pot and this was sufficiently successful to enable us to get the diagrams shown in 11 and 12, with the… | ||
| Scan126 | Modifications to shock dampers, including a sketch. | ||
| View original record | Hs. FROM DA. X235 DA2/M19.5.31. SHOCK DAMPERS. With reference to HS/RM5/KT12531., we suggest that you should try the following points: (1). Reduce the width of the valve seat probably by machining off… | ||
| Scan127 | The fitting of wearing pads to Phantom II dampers and the acquisition of 20 HP dampers for a 25HP car. | ||
| View original record | Copy. X235. To RHC. From Hs/Rm. Hs/Rm.3/KT.19.5.31. SHOCK ABSORBERS. With reference to your note re. wearing pads in nitro-alloy steel and steel that has been hardened after grinding. We have arranged… | ||
| Scan128 | Floor plan layout of a test department with various testing rigs and component areas. | ||
| View original record | r 235 M.A.R. FILE UNDER SHOCK DAMPERS 18-5-31 FITTING SECTION BENCH GENERATOR D.C. SWITCH VARIABLE SPEED DAMPER RIG MOTOR DAMPER RIGS ENDURANCE DAMPER RIG MOTOR ETC AUXILIARY PUMP TESTS. A.C. SWITCHES… | ||
| Scan129 | Short memo confirming that tests on shock dampers are being carried out. | ||
| View original record | X235. To Da. From Hs/Rm. Hs/Rm.11/KT. 21. 5. 31. SHOCK DAMPERS. With reference to Da2/M19.5.31. we are carrying out tests under the lines indicated. Hs/Rm. | ||
| Scan130 | Development and testing of hydraulic shock absorbers. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Mor. c. to Da. E. c. to By. 8235. Hs/Rm.4/KT.1.6.31. HYDRAULIC SHOCK ABSORBERS. We have now reached a stage in the development of the double valve where we can say that it… | ||
| Scan131 | Blueprint showing schematics for a double piston damper, air vent ball valves, and value variations. | ||
| View original record | 1-6-31 Hs 369 DAS'S SCHEMES L.P. PASSAGE CHAMBERED OUT VALUE DIA REDUCED SPRING CHAMBER AIR RELEASE MASK .005" RADIAL CLEARANCE .161 DIA .075 DIA .095 DIA .185 DIA .156 DIA BALLS .050" LIFT .300"… | ||
| Scan132 | Performance graphs for a Double Piston Damper under various pressure and spring configurations. | ||
| View original record | Top Left Graph: 14 DOUBLE PISTON DAMPER - LOW PRESSURE 4" STROKE. MASKED VALVE. .010 CLEARANCE - LIGHTENED .025 DIA. HOLE IN H.P. VALVE. LIGHT VALVE SPRINGS. 3 x 8 LBS 70 R.P.M. 150 " 308 LB/IN 120… | ||
| Scan133 | Results of tests on a shock absorber valve, comparing configurations with and without a hole. | ||
| View original record | γ 235. To Da. From Hs/Rm. Hs/Rm.5/KT.1.6.31. With reference to Da2/M19.5.31. we have carried out the test which you suggest on a standard type of valve without a hole in it with the results attached.… | ||
| Scan134 | Investigation and resolution of a noise issue in a double piston damper. | ||
| View original record | N. SCH. 3190 & 5. DOUBLE PISTON DAMPER. Before fitting it on to test rig (during the filling process) it was noticed that the loads were exceptionally heavy, there was no air release and that when the… | ||
| Scan135 | Experiments to eliminate noise from a valve by modifying hole diameters, springs, and piping. | ||
| View original record | - 2 - When the hole in the valve was replugged the noise was again produced, also the diagrams remained "in the air". The hole was then re-opened and an additional hole .025" drilled in the L.P.… | ||
| Scan136 | Test report on modifications to a valve and damper system to reduce noise and rationalize pressure. | ||
| View original record | - 3 - By increasing the radial clearance to .010" and utilising the .025" dia. H.P. valve hole, the damper was silent, and the diagrams were more rational. The high pressure diagram shewed a distinct… | ||
| Scan137 | Tests conducted on various spring and valve configurations to reduce noise and assess oil emulsification in a damper. | ||
| View original record | - 4 - Another spring giving 8 lb. initial load, and 200 lb/in. capable of being fitted with the sylphon was tried. The most satisfactory results so far obtained were with this 200 lb/in. in… | ||
| Scan138 | Four indicator diagrams comparing Double Piston Damper performance under different pressure and spring configurations. | ||
| View original record | Top Left Quadrant: DOUBLE PISTON DAMPER - LOW PRESSURE. REDUCED H.P. VALVE - Hs. 354 - 8 LB. 200 LB/IN RATING SPRING L.P. PORT CHAMBERED OUT - DA'S SCHEME, Hs. 355 4" STROKE - NOISY 150 R.P.M 70 "… | ||
| Scan139 | Customer complaints of 'bad rattles' in shock dampers and proposing a new investigation policy. | ||
| View original record | [Stamp: RECEIVED 4 JUN 1931] [Handwritten: X235.] [Redacted Distribution List:] Md. C. WOP. C. EH. C. Hs. C. Mr. Brock SHOCK DAMPERS. ---------- In connection with the shock damper complaints which we… | ||
| Scan140 | Query about the reason for changing a cored piston to a heavier flat piston in shock dampers. | ||
| View original record | HS. FROM DA. Copy to BY. Copy. X238 re. SHOCK DAMPERS. DA6/M5.6.31. With reference to BY2/G1631., it would be interesting to us to know the reason for the deletion of the coring and substitution of a… | ||
| Scan141 | Proposing the development of driver-adjustable hydraulic shock absorbers. | ||
| View original record | Hs/Rm Y235. To R. from Sg. re Hydraulic Shock Absorbers. Copy to Hs/Rm. HCr. Du. EF DV RECEIVED 10 JUN 1931 Sg4/E976.31 Referring to Hs/Rm.4/KT.1.6.31 I note in the last paragraph he says: "In any… | ||
| Scan142 | The investigation of a problematic shock damper on trials car 123-GY from Rippon Bros. | ||
| View original record | Y235. WOR. c. Hds c. EP. c. Hs. c. Mx. C. Mr. Brock. BY7/G.9.6.31. TRIALS CAR - 123-GY. RIPPONS. Further to my note on the above subject (BY3/ G.3.6.31.) as we anticipated Mx. has been unable to find… | ||
| Scan143 | Further investigation into bad body booms on the trials car 123-GY, Rippons. | ||
| View original record | To A.W. from Wor. Copy to Mr. EP. Hs. Mx. Copy to Mr. Brock. γ235. Wor2/T11.6.31. Trials car 123-GY. Rippons I fully agree with your memo, and think it would be worth while further investigating as… | ||
| Scan144 | Requirements for fitting new type dampers on the 25 HP Bump Chassis. | ||
| View original record | To RHC. From Hs/Rm. 8235. Hs/Rm.2/KT.11.6.31. NEW TYPE DAMPERS ON THE 25 HP. BUMP CHASSIS. Will you please note that we shall require a means of lubricating the connecting links from the front axle… | ||
| Scan145 | Requesting to fit dampers with nitroalloy wearing pads following successful tests. | ||
| View original record | 8235 To RHC. From Hs/Rm. Hs/Rm. 3/KT.11.6.31. WEARING PADS. SPLIT PISTON TYPE R.R. SHOCK ABSORBERS. In view of the results we have had on our tests with nitroalloy wearing pads, will you please… | ||
| Scan146 | Development and testing of hydraulic shock absorbers controlled from the driver's seat. | ||
| View original record | 8235. To R. From Hs/Rm c. to SG. EST. c. to Ba. R. c. to Hy. Hs/Rm. 2/KT.13.6.31. HYDRAULIC SHOCK ABSORBERS CONTROLLED FROM DRIVER'S SEAT. With reference to Sg4/E9.6.31. As you are aware you have… | ||
| Scan147 | Diagram showing modifications to a double piston damper and sylphon chamber pressure release. | ||
| View original record | 6-6-31 GROOVE '075" RAD. ADDED TO EFFECT RELEASE. THIS HOLE WAS FOUND TO REQUIRE RADIUSING TO DRG: (.187") DOUBLE PISTON DAMPER. SYLPHON CHAMBER PRESSURE RELEASE. | ||
| Scan148 | Performance graphs for a Double Piston Damper under high and low pressure conditions. | ||
| View original record | TOP SECTION: DOUBLE PISTON DAMPER. HIGH PRESSURE 10.6.31. MASKED VALVE -.010" CLEARANCE -.025" DIA. H.P. VALVE LEAK. VALVE SPRING 200 LB/IN (APPROX) 4" STROKE. 70 R.P.M. SYLPHON PRESSURES 0-3LB/D" 10"… | ||
| Scan149 | Substitution for square or parallel serrations on shock dampers. | ||
| View original record | COPY. BY. from DA. Copy to Sg. DA2/M13.6.31. SHOCK DAMPERS. With reference to BY1/GLO631, we discussed BY11/G21531 with R. as soon as we received it, and he agreed to substitute either the square or… | ||
| Scan150 | Design and future development of hydraulic shock absorbers. | ||
| View original record | S/W. (---) c. to Hs. Hs. 8235. Sg3/D15.6.31. RECEIVED 16 JUN 1931 Re: Hydraulic Shock Absorbers. ------------------------- Referring to the above and the question of the WW. design containing certain… | ||
| Scan151 | The development and testing of hydraulic shock absorbers for the P.2, 25 HP, and Phantom models. | ||
| View original record | To Sg. From Hs. c. to Wor. c. to Da. X 235. Hs.3/MJ.16.6.31. X.235. X.7520. X.5520. HYDRAULIC SHOCK ABSORBERS. Sg.3/D15.6.31. The P.2 car (25-EX) which we expect to go to France early next week, will… | ||
| Scan152 | Modifications and specifications for Type Rear Dampers and Ball-Pin Oil Holes on chassis 25-EX. | ||
| View original record | X235 Re. F83611 Hs/Rm. TYPE REAR DAMPERS. The cast iron end covers used with these dampers have narrower valve seats than standard, thus the valve areas are greater than with aluminium end covers.… | ||
| Scan153 | The despatch and endurance testing of improved type shock absorbers with nitroalloy wearing pads. | ||
| View original record | 8235. To PN. From Hs/Rm. c.c. to Wor. Sg. Hs/Rm.7/KT.23.6.31. IMPROVED TYPE SHOCK ABSORBERS. 8-7520. X 235. We have today despatched to Cricklewood a second set of 40/50 rear shock absorbers. These… | ||
| Scan154 | Schemes for fitting driver-controlled hydraulic shock dampers to the chassis. | ||
| View original record | Hs. from Da. c. Sg. Ev. X235 Dal/M24.6.31. X.235 X.7520 X.5520 HYDRAULIC SHOCK DAMPERS CONTROLLED FROM DRIVER'S SEAT. With reference to Hs/Rm2/KT13.6.31. we should like to point out that you have had… | ||
| Scan155 | Difficulty with setting poundages on new dampers with cast iron ends and a proposed solution. | ||
| View original record | 8235. To BY. From Hs/Rm. Hs/Rm.3/MJ.24.6.31. IMPROVED R.R. SHOCK ABSORBERS. A difficulty has arisen with regard to the setting of the poundages on the new dampers with the cast iron ends. With the… | ||
| Scan156 | Need for accurate location of the sylphon tube in hydraulic shock absorbers. | ||
| View original record | To Da. From Hs/Rm. 8235. Hs/Rm. 4/KT. 24. 6. 31. HYDRAULIC SHOCK ABSORBERS. If you are doing anything further with the sylphon tube type of remote control for the shock absorber valves, will you… | ||
| Scan157 | Requesting the use of Nitro Alloy for wearing pads on new shock absorbers, replacing existing case-hardened steel parts. | ||
| View original record | To RHC. From Hs/Rm. γ 235 Hs/Rm.5/MJ.29.6.31. NITRO ALLOY PARTS FOR NEW TYPE R.R. SHOCK ABSORBERS. It is essential that we should fit nothing but Nitro Alloy wearing pads to the new type R.R. shock… | ||
| Scan158 | Improved results of new shock absorbers using Nitro Alloy wearing pads over case-hardened steel. | ||
| View original record | BY. From Hs/Rm. J235. Hs/Rm.6/MJ.29.6.31. NEW TYPE SHOCK ABSORBERS. Please note that we find we get very much better results with Nitro Alloy wearing pads on the new type R.R. shock absorbers, than… | ||
| Scan159 | Modifications and tests conducted on a No. 2 Double Piston Damper to resolve a noise issue. | ||
| View original record | Copy for files. N.Sch.3190/2/5 Y235. 7.7.31. X235 X7520 NO 2 DOUBLE PISTON DAMPER. After having successfully cured the valve "squawk" on the first damper tested, the modifications necessary to… | ||
| Scan160 | Experiments to eliminate a 'squawk' noise from a damper by modifying springs, valves, and leaks. | ||
| View original record | (2) 330 LB/IN springswere used the damper was quiet. Having arrived at this possible solution, the Hp. leak was again blocked up to ensure that the cessation of the "squawk" was not due to some other… | ||
| Scan161 | Report page discussing masked valve clearances and modifications for dampers. | ||
| View original record | (3) At present it seems that either a series of masked valves giving a range of clearances up to .010" will be required, or else holes must be drilled through the valve to suit individual dampers,… | ||
| Scan162 | Design drawing for a Masked Valve for a No 2 Double Piston Damper. | ||
| View original record | MASK SWEATED ON & GROUND H.P. VALVE LEAK. .025 DIA F83361 TWO HOLES .055" DIA MASKED VALVE. Nº 2 DOUBLE PISTON DAMPER .028" 90° .350 DIA .707" DIA 8-7-40 M.S. | ||
| Scan163 | Customer complaints, development, and testing of shock dampers. | ||
| View original record | EJB. from Hs/Rm. c. WOr. c. EV. 8235. X.7520. X.5520. X.235. Hs/RmL/ADL 7.7.31. SHOCK DAMPERS. With reference to EJBL/GL 3.7.31. We want all the assistance we can get to ensure that we are free from… | ||
| Scan164 | Fault with noisy shock absorbers and an ineffective modification. | ||
| View original record | Mr. Brock From Hs/Rm. c. to Wor. c. to By. Hs/Rm.1/MJ.24.7.31. We believe that you have been handicapped in dealing with shock absorbers returned as noisy, by the fact that we have not sent you all… | ||
| Scan165 | Investigation into the cause of knocking shock absorbers on the 20 HP car. | ||
| View original record | COPY. To DA. From Hs/Rm. c. to Wor. By. c. to Hm. Mx. Hs/Rm.5/LG.4.12.28. KNOCKING SHOCK ABSORBERS. Whilst investigating noisy shock absorbers on the rear of the 20 HP. car we have come across a… | ||
| Scan166 | 10,000-mile test of shock absorbers, detailing a fault with the replenishing ball valve and proposed solutions. | ||
| View original record | 8235. X.235. X.7520. To R. From Ha/Rm. c. to Sg. Wor. c. to Da. H. c. to By. Ha/Rm.2/WJ.24.7.31. 10,000 MILE TEST SHOCK ABSORBERS. We have received the following report from Hancock today, with… | ||
| Scan167 | Conditions of a 10,000-mile test on shock absorbers for the 25-EX model. | ||
| View original record | S/W. Hs/Rm.. From PN. c. to Wor. Sg. Mr. Chapman. H. Hd. COPY. X235- PN.12/WT30.7.31. 10,000 Miles Test - 25-EX. Shock Absorbers. X.7941. X.235. X.7520. Referring to your Hs/Rm2/MJ24.7.31, we are not… | ||
| Scan168 | Issues with shock absorbers during a 10,000-mile test, specifically regarding high loads in France. | ||
| View original record | 8235. To PN. from Hs/Rm. c. Wor. Sg. c. H. Hd. Hs/Rm2/AD4.8.31. 87941 Y235. 87520 10,000 Miles Test - 25-EX. Shock Absorbers. With reference to PN12/WT30.7.31, the trouble experienced on these shock… | ||
| Scan169 | Technical document detailing a noise issue in hydraulic shock absorbers caused by the replenishing ball valves. | ||
| View original record | COPY. 8235. To Hd. from Hs/Rm. (For Depot Sheet). Hs/Rm.1/AD11.8.31. X.235 X.7520. HYDRAULIC SHOCK ABSORBERS. A shock absorber noise has been traced to the replenishing ball valves. In certain cases… | ||
| Scan170 | Responding to issues raised about assembling a new type of damper connecting link. | ||
| View original record | Rm. C [crossed out] BY/HED. 8-235. BY10/G.31.8.31. NEW TYPE DAMPER CONNECTING LINK. Referring to GWH's sketch pointing out certain disabilities in assembling the parts of the spring control damper… | ||
| Scan171 | Comparison of 'Delco' and 'HS/Rm' type split damper pistons. | ||
| View original record | SPLIT DAMPER PISTONS. COMPARISON BETWEEN "DELCOS" & HS/RM'S TYPES. The "Delco" piston is turned to the finished dia. and the end face is squared up at the same setting. These settings form the… | ||
| Scan172 | Comparison of manufacturing operation sequences for Delco and HS/Rn type pistons. | ||
| View original record | These latter details, together with the elimination of the grinding process and a very plain initial casting make the production of the "Delco" pistons a cheaper proposition than the Hs/Rn type, apart… | ||
| Scan173 | Manufacturing operations plan for a 'Delco' Damper Piston. | ||
| View original record | OPERATIONS:- 1. TURN DIA FINISHED SIZE AND FACE END. 2. MILL ALL FLAT FACES. 3. DRILL ALL HOLES. 4. COUNTERBORE. 5. TAP - SPRING SCREW HOLES (ONE HALF PISTON ONLY) "DELCO" DAMPER PISTON. PROBABLE… | ||
| Scan174 | Experiences with low rating springs and various shock absorbers on a 40/50 model for use abroad. | ||
| View original record | Copy X235. To Hs. from Sg. c. R. Wor. c. PN. Sg16/E.31.8.31 X.7410 X.7520 X.235 RE : LOW RATING SPRINGS ON 40/50 FOR USE ABROAD AND SHOCK ABSORBERS. I thought you would be interested to have… | ||
| Scan175 | Technical letter discussing vehicle controllability issues related to front and rear shock absorbers and low-rating springs. | ||
| View original record | -2- About half way to Paris I had the front Hartfords put out of action with a view to ascertaining whether the springing of the car as a whole and the controllability of the steering would be… | ||
| Scan176 | Adjustable shock absorber schemes and their application for different road conditions. | ||
| View original record | To Sg. From Hs. c. to R. Wor. c. to E. Da. c. to By. PN. Hs.1/WJ.2.9.31. 40/50 SPRINGING. Replying to Sg.16/E.31.8.31. We should be very interested to hear how 58-GN. behaves on the roads you are… | ||
| Scan177 | Vehicle suspension dampers, comparing Hartford's with in-house adjustable systems and future riding quality improvements. | ||
| View original record | -2- Hs.1/MI.2.9.31.Cont'd. Continental cars we are fitting Hartford's as well as our hydraulics. In a number of cases we are having to give customers Hartford's or getting them to pay for them in… | ||
| Scan178 | Performance graphs for a Delco II Rear Damper with adjustable leak and 12-inch lever, showing various high and low pressure tests. | ||
| View original record | DELCO REAR DAMPER - ADJUSTABLE LEAK. 12" LEVER. Top-Left Graph: DELCO II. HIGH PRESSURE 4" STROKE. N°1 LEAK. 70 R.P.M 50 R.P.M 25 R.P.M 462 LB/D" MAX. PRESSURES 1085 LBS/D" 925 " 323 " Top-Right… | ||
| Scan179 | Performance graphs for a Double Piston Damper under high and low pressure conditions. | ||
| View original record | TOP GRAPH: DOUBLE PISTON DAMPER. HIGH PRESSURE. 10-6-31. MASKED VALVE -.010" CLEARANCE -.025" DIA. H.P. VALVE LEAK. VALVE SPRING 200 LB/IN (APPROX) '4" STROKE. 70 R.P.M. SYLPHON PRESSURES 0-3 LB/D"… | ||
| Scan180 | Performance and controllability of shock absorbers. | ||
| View original record | H3 823 X7520. XJ520. X235T. To R. from Sg. Copy to Hs. WEP, re Shock Absorbers. I understand that Hs. is probably bringing a car down to you to-morrow fitted with similar shock absorbers to those… | ||
| Scan181 | From Sg. to R. regarding adjustable shock absorbers and dashboard control. | ||
| View original record | To R. from Sg. Sg19/E24.9.31 - 2 - I do hope, therefore, that every effort will be made to let us have adjustable shock absorbers as soon as possible, even if as the first step it is necessary to… | ||
| Scan182 | Clarifying the specifications for holes in high-pressure shock damper valves for various chassis models. | ||
| View original record | Hs. c. By/HEB. COPY. 8235 BY.5/G.2.9.31. X.235. X.5520. X.7520. SHOCK DAMPERS. MR. HANCOCK'S REPORT 5.8.31. With regard to the fact that Mr. Hancock points out that the .038" holes in the high… | ||
| Scan183 | Adjustability of 40/50 springing and a request for hydraulic shock absorbers for car 58-GN. | ||
| View original record | S/W. Hs. From Sg. X235. Re. 40/50 Springing. Eg2/E8.9.31. X.7520 X.7410 X.235. Thanks for Hs.1/MJ.2.9.31. I should rather like to discuss when next at Derby the question of adjustability referred to.… | ||
| Scan184 | Altering front shock dampers on car 58-GN and demonstrating a Phantom II with adjustable hydraulics. | ||
| View original record | COPY. 8235. X.7520. X.7410. X.235. To Sg. From Hs. Hs.6/MJ.9.9.31. Re. 40/50 SPRINGING. Replying to Sg2/E8.9.31. We can alter the front shock dampers on 58-GN. so as to do away with the necessity of… | ||
| Scan185 | Imperative use of flexible springs and adjustable shock dampers, and exploring control system options. | ||
| View original record | HS. } FROM R. BY. } C. to SG. WOR. DA. X235 R2/M26.9.31. SHOCK DAMPERS AND ROAD SPRINGS. X.235 X.7410. X.5410. It seems absolutely imperative that we must use flexible springs on the bulk of our car… | ||
| Scan186 | Increasing the poundage on the rear shock absorbers for a trials car. | ||
| View original record | FILES EP. SHOCK ABSORBERS. We understand that you wish to increase the poundage on the rear shock absorbers of a trials car in a similar manner to those at present running on the open cream car. The… | ||
| Scan187 | Concluding that replenishing pipes for hydraulic dampers are an unnecessary complication. | ||
| View original record | To R. From Hs. c. to Sg. Wor. c. to E. Da. c. to By. 8235. Hs.1 /MJ.9.10.31. X. 235. X.7520. X.5520. HYDRAULIC DAMPERS REPLENISHING PIPES. From our experience on experimental cars, and also reports… | ||
| Scan188 | Modifications to front and rear hydraulic shock absorbers to reduce knocking. | ||
| View original record | To Hd. (For Depot Sheet) 8235 HS/Rm.1/AD11.11.31. HYDRAULIC SHOCK ABSORBERS. X.235. X.7520. X.5520. Recently, two modifications have been incorporated on hydraulic shock absorbers which materially… | ||
| Scan189 | Blueprint detailing drilling specifications for a main cylinder and end cover. | ||
| View original record | FS3922 DOTTED LINES INDICATE PRESENT DAMPER CASING OUTLINE DRILL .337 DIA TAP .375 DIA 26 TPI RH .4375 .625 +5 E 77242 F 83919 F 83920 F 77983 E 8153 SCALE 2/1 DRILLING FOR MAIN CYLINDER & END COVER… | ||
| Scan190 | Blueprint showing the oiling scheme for a link joint on a front axle damper. | ||
| View original record | NSCH3244 .187 D/O BRASS TUBE P.III W.2 Scale F/L WGN 2-3-31 JCo OILING SCHEME FOR LINK JOINT - FRONT AXLE DAMPER NSCH3244 ROLLS-ROYCE LIMITED PRINT ROOM 11 NOV 31 | ||
| Scan191 | Test results concerning self-adjustable hydraulic shock absorbers. | ||
| View original record | To R. from Hs/Rm. c. SG. c. WGT. E. c. De. EV. X235. X.235. X.7520. X.5520. Hs/Rm.2/ADH 9.11.31. SELF ADJUSTABLE HYDRAULIC SHOCK ABSORBERS. In view of your suggestion that it might be possible to make… | ||
| Scan192 | Tests measuring the movement and pumping action of shock damper levers on different road surfaces. | ||
| View original record | To R. from Hs/Les. C. Sg. C. Wor. E. C. Da. EV. MOVEMENT OF SHOCK DAMPER LEVERS P.II. In order to compare the pumping action available at the shock dampers at various speeds, the following figures… | ||
| Scan193 | Data table comparing rear damper specifications by time to complete a 360° movement at various speeds on two road surfaces. | ||
| View original record | Time in secs. to complete 360° of the O.S. rear damper in an upward direction Specification of rear dampers. Speed in MPH. ROAD SURFACE "A" outward directn. inward directn. ROAD SURFACE "B" outward… | ||
| Scan194 | Possibility of omitting a filter in Delco hydraulic shock dampers. | ||
| View original record | HS FROM DA. X235. DA2/11.12.31. X235. HYDRAULIC SHOCK DAMPERS. You will remember that when discussing the Delco shock damper you commented upon the absence of a filter between the reservoir and the… | ||
| Scan195 | Design of hydraulic shock dampers and the necessity of a filter, comparing them to the Delco design. | ||
| View original record | To Da. from Hs/Rm. X235. Hs/Rm. 3/ADL4.12.31. HYDRAULIC SHOCK DAMPERS. With reference to Da2/Mll.12.31, we consider that the reason why Delcos could do without a filter was because they had no small… | ||
| Scan196 | Tests on hydraulic shock absorbers with cast iron ends to establish the size of solenoid required to operate the pin valve. | ||
| View original record | X~35. FOR FILES. A number of tests were carried out on the R.R. hydraulic shock absorbers with cast iron ends to establish the size of solenoid required to operate the pin varying the leak betweem the… | ||
| Scan197 | Blueprint showing a proposed modification for a magnetically controlled valve. | ||
| View original record | PROPOSED MODIFICATION 9-3-32 VOL OF COIL 2.05 C:INS: PREVIOUS COIL 1.3 C:INS: ROLLS ROYCE, LTD. PRINT ROOM MAR 30 1932 DERBY. MAGNETICALLY CONTROLLED VALVE MAX: SIZE POSSIBLE FOR 20HP FRONT. WB | ||
| Scan198 | Cross-sectional drawing of a mechanical component with a handwritten note confirming its satisfactory operation. | ||
| View original record | PRESENT SCHEME WORKING SATISFACTORILY. ROLLS-ROYCE, LTD. PRINT ROOM MAR 31 1932 DERBY. | ||
| Scan199 | Design of a hydraulic shock damper control system. | ||
| View original record | DA/HDY. HS. ) FROM R. E. BY. ) (At Le Canadel.) X235. R1/M31.3.32. Sent from WW. 4.4.32. C. to SG. WOR. SHOCK DAMPER CONTROL: X.235 HYDRAULIC. I regret that I have not written more precisely to Mr.… | ||
| Scan200 | The design of a pump and damper system, including its controls, oil consumption, and valve components. | ||
| View original record | (2) The great feature I have given without more complication is the capacity of the pump to give any pressure from zero to a maximum by turning - by say 2 fingers - the small control shaft, probably… | ||
| Scan201 | Modifications to a controllable shock damper system using an oil pressure pump and valve. | ||
| View original record | DA/HDY. E. ) FROM R. HS. BY. ) (At Le Canadel.) C. to SG. WOR. PN. X235. R2/M5.4.32. Sent from WW. 8.4.32 X.235 CONTROLLABLE SHOCK DAMPER. It will be understood that our scheme is one in which we can… | ||
| Scan202 | Design and control of a self-adjusting hydraulic damper system. | ||
| View original record | HS. DA. ) FROM R. E. ) (At LE Canadel.) C. to SG. WOR. BY. PN. R.3/M12.4.32. Sent from WW. 14.4.32. X. 235 DAMPER SYSTEM, AND CONTROL OF SAME. We are nothing unless we are thorough, because we are… | ||
| Scan203 | On the poor design of Bentley-Draper hydraulic dampers and general suspension issues. | ||
| View original record | HS. DA. } FROM R. E. BY. } (At Le Canadel.) X235 R2/M14.4.32. Sent from WW. 16.4.32. C. to SG. WOR. PN. X.235 X.832 SHOCK DAMPERS. Apparently the Bentley-Draper Hydraulic dampers are very poor, both… | ||
| Scan204 | Proposing to proceed with an experimental trial for a shock damper controlled by a centrifugal governor. | ||
| View original record | BY. FROM R. X235 R2/M31.5.32. X.235 C. to SG. WOR. DA. C. to E. HS. Re. SHOCK DAMPER CONTROL. It appears that the type with the little pump having the pressure regulated by centrifugal governor… | ||
| Scan205 | Urgent need to introduce adjustable shock dampers due to customer complaints and competitor offerings. | ||
| View original record | To R. from Hs. c. Sg. Wor. c. E. De. c. W. Hdy.(W.W.) X-235. Hs.6/AD8.7.32. ADJUSTABLE SHOCK DAMPERS It would be a pity if our interest in new models allowed our bread and butter products to suffer.… | ||
| Scan206 | Modifications for a single valve type shock damper, including material changes and test suggestions. | ||
| View original record | HS. FROM R. X235 R1/M13.7.32. C. to SG. WOR. BY. DA. E. SHOCK DAMPERS - SINGLE VALVE TYPE. Let us bring this in line with the double valve - RR. type - by the following modifications : (1) No grooves… | ||
| Scan207 | High cost and customer dissatisfaction associated with hydraulic shock absorbers. | ||
| View original record | Hs X235. x7520 x5520 To. R. from Sg. Copy to Mr. Hs. re Hydraulic Shock Absorbers. You will have seen in a memo. from Hs. the other day he mentioned we are carrying a legacy of about 300 hydraulic… | ||
| Scan208 | Confirming a phone message regarding the performance of double valve shock dampers. | ||
| View original record | X235 HS/RM. FROM R. R1/M18.7.32. CONFIRMATION OF PHONE MESSAGE. re. SHOCK DAMPERS. I understand from Mr. Hardy that our double valve was quite satisfactory for both diagrams and silence when applied… | ||
| Scan209 | Design, cost, and performance issues related to Peregrine shock dampers. | ||
| View original record | HS. } HDY. } FROM R. BY. } X235 R1/M10. 8.32. C. to SG. WOR. E. X.235 X.4027. PEREGRINE ETC, SHOCK DAMPERS. To get these reasonable in cost we must make as many as possible, preferably to the same… | ||
| Scan210 | Rig test results for a single valve type shock damper to reduce noise. | ||
| View original record | X235. To R. from Ha/Rn. c. to Sg. Wor. c. to E. Da. c. to Hy. Hdy. Ha/Rn.2/KT.11.8.32. SHOCK DAMPERS. SINGLE VALVE TYPE. Replying to RL/M13.7.32. We have now tried out on the rig, the damping scheme… | ||
| Scan211 | Test results and issues with single valve shock absorbers. | ||
| View original record | Hdy. from Hs/Rm. X235. Hs/Rm.10/ADL 2.8.32. SINGLE VALVE SHOCK ABSORBERS Confirming our today's telephone message. We send you herewith indicator diagrams taken with the valve altered to N.Sch.3497.… | ||
| Scan212 | Troubleshooting and development history of shock dampers. | ||
| View original record | HS. BY. E.} FROM R. X235 R1/M20.8.32. C. to SG. WOR. HDY. re. SHOCK DAMPERS. ----------------- These should now be considerably less liable to give trouble. When first re-introduced it will be… | ||
| Scan213 | Specifications and test results for two types of valve springs for scheme N.SCH.3497. | ||
| View original record | 8235. VALVE SPRING FOR N. SCH. 3497. 10.9.32. 10" Lever. DO. Spring. 1. 50 lb. Ball Pin = 3.8935 lbs spring load. 100 " " " = 7.787 " " " 150 " " " = 11.680 " " " 2. Rating = 97.4 lb/in. 3. 75 lb.… | ||
| Scan214 | Technical query regarding a modification to a shock absorber valve to prevent oil leakage by replacing the leather piston with a diaphragm. | ||
| View original record | RHC. from Hs/Rm. X 235 Hs/Rm.10/KT.10.9.32. SHOCK ABSORBER VALVE TO N.SCH.3497. When we use the external oil scheme, one of the troubles is that the oil leaks past the leather piston. The rate of… | ||
| Scan215 | Cross-sectional blueprint of a mechanical assembly featuring a bellows component. | ||
| View original record | MODIF'N TO N.SCH. 3497 HS. 705 | ||
| Scan216 | Blueprint detailing experiments on a shock damper with a conical seated and larger valve. | ||
| View original record | CONTROL PRESSER MUST BE DOUBLED UNLESS WE PROVIDE A LARGER PISTON SOME READJUSTMENT OF THESE DIMS WOULD EVENTUALLY BE NEEDED NO DOUBT MECH 3497 GROOVE TO RESERVOIR EXISTING EXTEND IF NECESSARY 14°… | ||
| Scan217 | Visit to Automotive Products Co. regarding the use of their components for remote control shock absorbers. | ||
| View original record | X235. Hdy. from Hs/Rn. c. to By. Hs/Rn.11/KT.16.9.32. REMOTE CONTROL - SHOCK ABSORBERS. N.SCH.3497. We paid a visit to the Automotive Products Co. - who manufacture the Lockheed braking system - with… | ||
| Scan218 | Blueprint for a moulded Lockheed cup component with dimensions and notes. | ||
| View original record | ALL FLASH MUST BE REMOVED FROM EDGE OF CUP TO BE MOULDED IN BLOCK LETTERS 1/8" HIGH PROJECTING 1/64" PLACE MANUFACTURER'S INITIALS HERE 0 TO 1/64" RAD: SHARP CORNERS DESIRED LOCKHEED APCọ PAT Nọ… | ||
| Scan219 | Details and modifications for a J.III hydraulic damper. | ||
| View original record | X735 BY. from Hs/Rm. c. BY/SS. c. RIC. Hs/Rm.11/KT. 23.9.32. Y5520. J.III HYDRAULIC DAMPER. You have now detailed for us - (1) The aluminium case. (2) The Cork and Rubber Gland. (3) The Cheapened… | ||
| Scan220 | Modifications for the Peregrine chassis and the development of automatic control. | ||
| View original record | -2- Hs/Rm.11/KT. 23.9.32. If you could detail and instruct N.sch.3497 with these necessary modifications for the first few Peregrine chassis, it will clear the section up for the time being. We… | ||
| Scan221 | Performance of a new single valve type shock damper and future design considerations. | ||
| View original record | HS. FROM R. X 235. R3/M1.10.32. C. to SG. WOR. RG. BY. E. PN. SHOCK DAMPERS. I am pleased to hear from HS. that the new single valve type shock damper is proving the best we have so far had, both for… | ||
| Scan222 | Test results for J.III type shock dampers with a conical seated valve and damping 'hat'. | ||
| View original record | COPY FOR FILES. X235 4.10.32. J.III TYPE SHOCK DAMPERS. X5520 N.S.3497 CONICAL SEATED VALVE WITH Hs.712 VALVE DAMPING "HAT". The following were found to give the best results, when the valve was set… | ||
| Scan223 | Difficulty with the single valve of hydraulic shock dampers due to temperature changes. | ||
| View original record | To E. from Hs/Rm. c. Sg. Wor. E. c. Ds. EV. HdV. X235. Hs/Rm.12/AD4.10.32. HYDRAULIC SHOCK DAMPERS TO N. SCHEME 3497. We have encountered a difficulty on the single valve of these shock absorbers. If… | ||
| Scan224 | From Sg. to Hs. chasing a previously requested memo regarding adjustable shock dampers. | ||
| View original record | 8235. To Hs. from Sg. re Our Adjustable Shock Dampers. Sg18/E13.10.32 You will remember that at our conference on the 6th I asked you to write a memo. to R. as per Item 3 of the Minutes which have… | ||
| Scan225 | Test report on N.S. 3497 conical seated valve shock dampers to resolve 'squawk' and 'thump' issues. | ||
| View original record | FILE X231 SHOCK DAMPERS N.S. 3405. J.III. TYPE SHOCK DAMPERS. Tests with N.S. 3497 Conical Seated Valve. This type of valve as originally designed had a narrow brimmed (.100" wide) valve damping 'hat'… | ||
| Scan226 | Modifications and tests on a damper component, focusing on pressure, load, and air venting. | ||
| View original record | -2- was .105" diameter. Since the main object of the holes was to prevent building up of the static load, and the diagrams previously obtained with the original 'hat' proved the pressures to be… | ||
| Scan227 | Modifications to bearings, lubrication tests, and analysis of a governor control scheme. | ||
| View original record | -3- Attention was concentrated upon the H.P. results since it was known that deletion of the bearing vent sent the diagrams "in the air", but at each important stage of development L.P. diagrams were… | ||
| Scan228 | Analysis of component performance and modifications related to pressure, load, and flow characteristics. | ||
| View original record | -4- axle velocities on the 4" stroke (i.e. 45 and 180 flywheel r.p.m. respectively) and these have been so far adhered to. The initial static loads were reduced to 40/40 lbs, and it was found that… | ||
| Scan229 | Report page detailing engine cylinder tests, performance at 180 r.p.m., and a comparison of valve springs. | ||
| View original record | -5- when another diagram was taken this was not confirmed. However, when the cylinder was again removed, cleaned in petrol, dried, and another diagram immediately run off at this speed, the first… | ||
| Scan230 | Development of governor-controlled shock dampers, related patents, and design modifications for various models. | ||
| View original record | X 235 HS. FROM R. R2/M2.11.32. X. 235 X. 728 C. to SG. WOR. BY. HDY. PN. SHOCK DAMPERS. PN. writes to say that the Renault people may have done some early work on somewhat the same lines that we are… | ||
| Scan231 | Restriction at the governor release valve and adapting pieces for a revised damper control unit. | ||
| View original record | X235 HS/RM. FROM HDY. HDY2/M30.11.32. C. to SG. WOR. BY. HS. DA. DAMPER CONTROL. With reference to the restriction at the governor release valve, we are sending herewith N. sch. 3593. which shews what… | ||
| Scan232 | Preliminary tests and proposed modifications for governor-controlled shock dampers. | ||
| View original record | ✓ 235. RHC. From Hs/Rm. Hs/Rm.2/MA. 2.12.32. GOVERNOR CONTROLLED DAMPERS. We have now made sufficient preliminary tests to be able to say that the governor control for the shock dampers is not very… | ||
| Scan233 | Comparing four different methods for implementing an over-riding hand control for the dampers. | ||
| View original record | HS/RM. FROM HDY. 235 HDYL/M5.12.32. C. to SG. WOR. E. DA. BY. OVER-RIDING HAND CONTROL TO DAMPERS. We can see at least four ways in which it would be possible to arrange the hand control of the… | ||
| Scan234 | Performance, oil loss issues, and potential improvements for shock dampers. | ||
| View original record | HS. FROM R. X235 R4/M6.12.32. C. to SG. WOR. BY. E. HDY. re. SHOCK DAMPERS. I am very pleased indeed to hear that the up-to-date dampers are working in such a way as to call for less need of control,… | ||
| Scan235 | Proposal to modify the J.3 pedals support and investigate the automatic damper control cylinder. | ||
| View original record | EXTRACT FROM: X 235 R. FROM DA. DA1/M6.12.32. WORK IN PROGRESS - 6.12.32. AUTOMATIC DAMPER CONTROL. We are now proposing to modify the J.3 pedals support to correspond with that recently done for… | ||
| Scan236 | Modifications to banjos and studs to suit 1/4' diameter pipes for governor control dampers. | ||
| View original record | r235, To nBy/HEB. From Hs/Rn. Hs/Rm.5/MA.9.12.32. Re. GOVERNOR CONTROL FOR DAMPERS. NS.3468. NS.3593. It has been found desirable to fit. 1/4" diam. pipes all round, therefore will you please modify… | ||
| Scan237 | Suggestion for trial modifications to a Damper Release Valve by drilling extra holes. | ||
| View original record | X235 HS/RM. FROM HDY. HDY2/M2.12.32. DAMPER RELEASE VALVE. With reference to N. sch. 3593. we suggest that after trial with a plug drilled with three .125 release holes as shewn, extra holes should be… | ||
| Scan238 | Performance of overriding control schemes for the suspension dampers. | ||
| View original record | 235. To Hdy. From Hs/Rm. c. to Sg. c. to Wor. c. to E. c. to Da. c. to By. Hs/Rm.15/MJ.12.12.32. OVERRIDING CONTROL TO THE DAMPERS. With reference to Hdy/1/M.5.12.32. We have tried schemes (1) and (2)… | ||
| Scan239 | The performance of an automatic, governor-driven shock damper control system fitted to a 40/50 car. | ||
| View original record | x 235. R. From HS/Rm. c. to Sg. c. to Wo f. c. to R. c. to Ey. c. to Ds. c. to Hdy. AUTOMATIC SHOCK DAMPER CONTROL BY GOVERNOR DRIVEN OFF GEARBOX N.Sch.3468. This is now fitted to a 40/50 car equipped… | ||
| Scan240 | Summary of work done on a new type of shock damper and governor control system, detailing four main issues and potential solutions. | ||
| View original record | -2- Hs/Ru.2/MS.16.12.32. Cont'd. Our main concern now is to get the new type of shock damper as silent and free from oil loss as our existing standard fitting. A brief summary of the work done on the… | ||
| Scan241 | Blueprint of a governor control test layout and a governor controlled release valve. | ||
| View original record | 23-11-32 Hs 792 DAMPER GAUGE. PUMP GAUGE. GOVERNOR GAUGE. GOVERNOR RELEASE PIPE. TRIPLE BANJO CONNECTION. DOUBLE BANJO CONNECTION. C GOVERNOR UNIT. GEAR PUMP TEST DAMPER. INDEPENDENT DELIVERY PIPE… | ||
| Scan242 | Comparative graphs of ball pin load versus external pressure for Leather Piston and Petrol Pump Diaphragm types. | ||
| View original record | BRITISH MADE J III REAR 40/40 LB NS 3497 LEATHER PISTON TYPE HS 795 14.12.32 TOP GRAPH: 1" STROKE Y-AXIS: BALL PIN LOAD LB (300, 200, 100) X-AXIS: EXTERNAL PRESS LB/D" (5, 10, 15, 20) CURVES: 540… | ||
| Scan243 | Development and testing of an automatic hydraulic shock absorber control system. | ||
| View original record | 8235 By. From Hs/Rm. Hs/Rm.3/MA.16.12.32. AUTOMATIC HYDRAULIC SHOCK ABSORBER CONTROL. We have now got R.R.Sch.269 with the hand control fitted to 3.Per.2 and J.2, both of which cars will shortly be… | ||
| Scan244 | Development and implementation of an automatic shock damper control system. | ||
| View original record | 8 235. To R. From Hs. c. to Sg. c. to Wor. c. to E. c. to By. c. to Da. c. to Hdy. AUTOMATIC SHOCK DAMPER CONTROL. We believe in the automatic shock damper control we have a scheme which should place… | ||
| Scan245 | Investigation into the shock damper governor control unit, including test results and proposed solutions. | ||
| View original record | 8235 To Hdy. from Hs/Rm. Hs/Rm.1/KT. 23.12.32. SHOCK DAMPER GOVERNOR CONTROL N. SCH. 3468. It was decided to isolate the pumping and governor controlling units to facilitate the investigation of the… | ||
| Scan246 | Test report on governor oil passage flow rates at different pressures and speeds. | ||
| View original record | -2- Hs/Rn.1/KT.23.12.32. A further test was made to see how much oil could be passed through the small passage O. sealed by the governor ball before appreciable back pressure was set up. The oil used… | ||
| Scan247 | Technical report detailing test results for a shock absorber and governor system, including fluid performance analysis. | ||
| View original record | -3- | Pump Speed R.P.M. | Pump Press. lb/sq.in. | Release Press. | Delivery at (R+1)lb/sq.in. Pts/Hr. |… | ||
| Scan248 | Compressor and pressure tests, investigating air bottle volume and oil performance in pipe lines. | ||
| View original record | -4- given below, which shew that increasing the volume of the air bottle eliminates the trouble. | | Compressor. | Lockheed. | | :--- | :--- | :--- | :--- | :--- | | Pump Speed R.P.M. | Pump Pressure… | ||
| Scan249 | Test report on the pressure and time lag between a Governor Pump and Damper using compressor oil and a 1/4' diameter pipe line. | ||
| View original record | -5- Hs/Rm.1/KT 23.12.32. Pressure - Time lag between Governor Pump and Damper using compressor oil and 1/4" dia. 12 ft. pipe line. | Pump. Speed. R.P.M | Pump. Press. lb/sq.in. | Damper. Press. | Time… | ||
| Scan250 | Blueprint showing the test layout and valve modifications for a governor control system. | ||
| View original record | 23.11.32 HS 792 DAMPER GAUGE PUMP GAUGE GOVERNOR GAUGE GOVERNOR RELEASE PIPE. TRIPLE BANJO CONNECTION DOUBLE BANJO CONNECTION TEST DAMPER GOVERNOR UNIT GEAR PUMP INDEPENDENT DELIVERY PIPE CONNECTABLE… | ||
| Scan251 | Graph and data tables for front axle damper performance with 7.5 levers. | ||
| View original record | FRONT AXLE DAMPERS 7.5 LEVERS. SHEET 3 COMPRESSION OR LOW PRESSURE STROKE MEAN AXLE VEL. FT/SEC. | MEAN BALL PIN. LOAD LBS. | MAX. BALL PIN. LOAD LBS. .75 | 27.7 | 29.5 1.07 | 32.6 | 32.6 1.50 | 40 |… | ||
| Scan252 | Blueprint with two graphs comparing governor pressure and pump delivery for dampers using different oils against speed. | ||
| View original record | JIII DAMPERS HS 803 N.SCH. 3468 GOVERNOR CONTROL GOVERNOR PRESS LBS/SQ' CURVE GIVEN ON N.SCH. 3468 MEASURED CURVE COMPRESSOR OIL ROAD SPEED M.P.H. PUMP DELIVERY Pts/HR ① LOCKHEAD FLUID ② COMPRESSOR… | ||
| Scan253 | Performance graphs comparing a Leather Piston Type and a Petrol Pump Diaphragm Type. | ||
| View original record | BRITISH MADE J III REAR 40/40 LB NS 3497 LEATHER PISTON TYPE. Hs 795 14.12.32. 1" STROKE BALL PIN LOAD LB. EXTERNAL PRESS LB/D" 540 R.P.M. 360 R.P.M. 180 R.P.M. 90 R.P.M. CUP LEATHER. PETROL PUMP… | ||
| Scan254 | Differential drilling method for locking the nuts on the inner and outer lever bolts for shock dampers. | ||
| View original record | BY. HDY. 235 HDY.2/M.24.12.32. C. to SG. WOR. HS. E. DA. RHC. SHOCK DAMPERS. Herewith is N.sch.3597 shewing a differential drilling for the locking of the nuts for the inner and outer lever bolts.… | ||
| Scan255 | Test results and future plans for the damper governor control system. | ||
| View original record | 8235 To Hdy. from Hs/Rm. Hs/Rm.1/KT.2.1.33. DAMPER GOVERNOR CONTROL. Further to our Hs/Rm.1/KT.23.12.32. We have taken the figures with the Lockheed Fluid with the attached results. These shew that,… | ||
| Scan256 | Test results for Damper Governor Control, detailing pressure time lag using Lockheed fluid. | ||
| View original record | DAMPER GOVERNOR CONTROL. N.S. 3468/3593. 30.12.32. Pressure - Time Lag between Governor Pump and Damper using "Lockheed" Fluid and 1/4" diameter 12 ft. pipe line. | Pump Speed R.P.M. | Pump Press.… | ||
| Scan257 | Performance graph for the J.III rear 40/40 lb. low-pressure hand control system at various RPMs. | ||
| View original record | J.III REAR 40/40 LB. LOW PRESSURE R.R.S. 269 - HAND CONTROL VALVE SPRING RATING 80 LB IN APPROX. DOUBLE DIAPHRAGM - A.C. x P.B. 1" STROKE % CONTROL MOVEMENT - MAX 100" 540 R.P.M 360 R.P.M 180 R.P.M 90… | ||
| Scan258 | Four graphs showing J.III Rear low-pressure valve spring performance at varying RPMs. | ||
| View original record | Top-Left Graph: J.III REAR. 40/40 LB. LOW PRESSURE. R.R.S.269. VALVE SPRING RATING 80 LB/IN. APPROX. 1" STROKE 90 R.P.M. DOUBLE DIAPHRAGM - A.C. & P.B. CONTROL LOAD MAX. 80 75% 53 50% 29 25% 12 ZERO 5… | ||