Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | Tests to find methods of overcoming torque reaction vibration periods. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.C.J. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. X.634 REF. Hs7/LG1.10.23. OBJECT OF TEST. To find means of… | ||
| Scan1 | 20 HP engine vibrations, detailing tests and findings related to the use of friction dampers. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-28). J.H., D. EXPERIMENTAL REPORT. Expl. No. 634 REF: He7/I/DH.10.28. 20 HP. - ENGINE VIBRATIONS. We have been carrying out continuous tests in connection with the above.… | ||
| Scan2 | Engine vibration periods and the effectiveness of modifications such as dampers and additional weights. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No 634 REF. Hs7/LGL.10.23. are hardly discernible under any conditions, whereas, the other extreme is to be found on the 10,000… | ||
| Scan3 | Table detailing 12 different engine mounting configurations and their resulting effect on road vibrations. | ||
| View original record | 2-SO/MARK-11. No. | Particulars of Mounting. | Effect on the road. ---|---|--- 1 | Standard G.11. engine mounting. | Bad vibrations at 15 m.p.h. Slight " " 12 m.p.h. 2 | Standard mounting with… | ||
| Scan4 | Sending someone to complete work on the 5-Goshawk-ll car by fitting friction dampers. | ||
| View original record | Da/Ev.from Hs. ORIGINAL Hs4/LGL.10.23. X 4615 5-Goshawk-ll Car. We sending someone down tomorrow to complete the work on 5-Goshawk-ll car at the Coachbuilders. They are taking with them some friction… | ||
| Scan5 | Outlining engine mounting experiments being conducted on the 20 HP unit. | ||
| View original record | To R. from Hs. c. to CJ. c. to Ds. c. to E. ORIGINAL Hs11/LGL.10.23. ENGINE MOUNTING EXPERIMENTS. Y634 We are carrying out the following experiments in connection with the above :- We are altering the… | ||
| Scan6 | Tests on variations of brush bedding in 20 HP Dynamos and the resulting effect on output and heating. | ||
| View original record | To R. & E. from EFC. c. CJ. & PN. c. WOR. BY. EP. c. DA. OY. s. EYB. ORIGINAL EFC1/T1.10.23. X.4383 - 20 H.P. DYNAMOS. Y4383 Further to our EFC1/T26.9.23, EFC4/T27.9.23 and EFC5/T28.9.23, and now… | ||
| Scan7 | Machine electrical output based on various brush positions, noting amperage, RPM, and temperature. | ||
| View original record | Contd. -2- EFC1/T1.10.23. The minimum output corresponding to the most retarded positions of the main brush contact surfaces and the most advanced position of the control brush contact surface, was… | ||
| Scan8 | Analysis of dynamo performance and failures, focusing on the effects of brush bedding variation and the design of the 20 HP brush gear. | ||
| View original record | Contd. -3- EFC1/T1.10.23. has not actually been tried as to whether this next worst condition would cause the commutator solder to run. The point brought home by this experiment is the large variation… | ||
| Scan9 | The frictional effects and forces affecting the bedding of a brush in its holder and on the commutator. | ||
| View original record | Contd. -4- EFC1/T1.10.23. In the majority of cases, the brush in position in its holder and on the commutator can be tilted over so as to cause an entirely different bedding thereon. Though the… | ||
| Scan10 | Modifying a brush holder by inclining a surface to counteract frictional effects from the commutator. | ||
| View original record | Contd. -5- EFCl/T1.10.23. holder the top of the brush will be. It will be agreed that the remedy for this will be, so to incline the surface of the brush at the bottom of the spring slot, that the… | ||
| Scan11 | Modifications to dynamo brush gear, including slant angle adjustments and overheating issues. | ||
| View original record | Contd. -6- EFC1/T1.10.23. Some time ago a set of brushes, from experimental car 3 GII, was altered in this manner, the slant angle given being 17° to 18° (an angle which we have confidence in… | ||
| Scan12 | The selection and testing of fuse wire sizes for a dynamo's field circuit, including test data under cold and hot conditions. | ||
| View original record | Contd. -7- EFC1/T1.10.23. carrying capacity to act as a protection against such over-excitation ? Although it is a complication to have a second size of fuse wire (three sizes of fuse) and a second… | ||
| Scan13 | The design and provisioning of fuses, comparing ready-loaded fuses with spare fuse wire. | ||
| View original record | Contd. -8- EFCl/Tl.10.23. has proved that it is not possible with this fuse in circuit to run the solder from the commutator connections with the dynamo on the chassis. One one or two of the… | ||
| Scan14 | Reducing torque reaction vibration on the 40/50 HP chassis. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H.D. ORIGINAL. EXPERIMENTAL REPORT. COPIES TO: RCJ. BJ. WOR. By E. Da. EP. OY. Expl. No. X4604 X.634 REF. Hs12/LG1.10.23 OBJECT OF TEST. To reduce torque reaction… | ||
| Scan15 | Vibration periods in 40/50 HP cars with different engine suspension setups. | ||
| View original record | EXPERIMENTAL REPORT Expt: No. 634. Ref. Hs12/LG1.10.23. PERIODS OF VIBRATIONS PICKING UP ON 40/50 HP. CARS. (1) Standard suspension of engine. Vibration felt on steering wheel at 8 m.p.h. very slight.… | ||
| Scan16 | Suggestion to create a scheme for fitting friction dampers to the 40/50 HP engine mounting. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to BY. c. to Da. ORIGINAL. Hs10/LGL.1.10.23. 40/50 HP. ENGINE MOUNTING. X4604 We suggest that a scheme is sent through showing how friction dampers could be fitted… | ||
| Scan17 | Carburettor for an E.A.C. engine. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H.D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9080 REF. Hs1/LG2.10.23. OBJECT OF TEST. Carburetter for E.A.C. engine.… | ||
| Scan18 | The observations of an E.A.C. Carburetter. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9080 REF: Hsl/LG2.10.23. E.A.C. CARBURETTER. The following is a summary of our observations on the E.A.C. Carburetter up to… | ||
| Scan19 | Noise issues and fuel vaporisation within a carburetter. | ||
| View original record | Expl: Report. Expl: No. 9080 Hs1/LG2.10.23. height of the jet proper end keeping the diffuser fired. Noise in Carburetter. At low speeds with small lift of the air valve the air velocity gives rise to… | ||
| Scan20 | The Goshawk 11 standard indicator diagram, plotting logarithms of absolute pressure and volume. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL Expl. No. REF: Hs/Bal/LGS1023. EXPERIMENTAL REPORT. To Rj from Hs/Ru. c. to CJ. GOSHAWK 11. STANDARD INDICATOR DIAGRAM. X4223 X4580 X4573 Attached… | ||
| Scan21 | Logarithmic pressure-volume indicator diagram showing engine expansion and compression curves. | ||
| View original record | G11 γ (expan) = AB/AC = 12.35/9.85 = 1.255 γ (compn) = A'B'/A'C' = 11.4/8.75 = 1.32 Log Abs. Pressure 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700 Log Volume FRACTIONS OF… | ||
| Scan22 | Improving low-speed engine power by reducing the camshaft angle from 118° to 110°. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.C., BJ, WOR, By, (E, Da, EP), (EH, OY) Expl. No. Y4134 4229 REF H54/LGS.10.23. OBJECT OF TEST. To improve power at… | ||
| Scan23 | Camshaft tests for a 20 HP engine. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4229 REF: H.4/L/31023. CAMSHAFT TESTS ON 20 HP. The modified camshafts were put in hand as a result of tests carried out on… | ||
| Scan24 | Graph showing the percentage increase in BHP over a standard camshaft by using 110° and 108° camshafts. | ||
| View original record | B.H.P. INCREASE % OVER STANDARD CAMSHAFT OBTAINED BY USING 110° AND 108° CAMSHAFTS. % INCREASE IN POWER ABOVE STANDARD R.P.M. 110° CAMSHAFT 108° CAMSHAFT H.J. LIDSEY, 21.9.23. | ||
| Scan25 | Performance graph comparing standard and experimental camshafts for a Goshawk II engine, showing Brake Horsepower (BHP) against Revolutions Per Minute (RPM). | ||
| View original record | GOSHAWK II STANDARD AND EXPERIMENTAL CAMSHAFT. ENGINE 8 GII. 45° VALVE SEATS. BATTERY IGNITION. ENGINE WATER AT 80°C. SILENCER FITTED. BOTH CURVES OBTAINED UNDER THE SAME CONDITIONS. B H P R P M… | ||
| Scan26 | The E.A.C. engine's condition after 30 hours of running, with notes on adjustments and issues. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. S E C R E T EXPERIMENTAL REPORT. Expl. No. 9770 REF: HES/LGA.10.23. E.A.C. ENGINE. To R. from Hs. c. to CJ. c. to E. We dismantled this engine after it had… | ||
| Scan27 | Issues with a countersunk screw, tappet guides, and engine vibration. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT Expl. No. 9770 REF: HGS/L.C4.10.23. with the cheese-head screw because of the difficulty of making the joints in the countersunk… | ||
| Scan28 | Vibration issue, including a table of horsepower versus revolutions. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Exptl. No. 9770 REF: Hs3/LG4.10.23. we appear to get a vibration which appears to be similar in character to the high speed… | ||
| Scan29 | Customer complaints of boiling in 40/50 HP cars when climbing mountain passes. | ||
| View original record | R.R. 493 (10 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (RC.) St-Wor. By (E) Da (EP) √(PN) OY Expl. No. 1751 x766 REF. Hs3/LGS.10.23. OBJECT OF TEST. To find reason of… | ||
| Scan30 | Comparing the car cooling systems of various makes with Rolls-Royce models. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 1751 REF: He3/LGS.10.23. COMPARISON OF CAR COOLING SYSTEMS. We have obtained by actual measurement details of the cooling… | ||
| Scan31 | Comparing the matrix dimensions of various car radiators. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT Expl. No. 1751 REF: HsS/LG5.10.23. COMPARISON OF MATRIX DIMENSIONS OF CARS. We have endeavoured to make reasonable comparison of the… | ||
| Scan32 | Comparison of the Goshawk 11 and 40/50 HP radiators. | ||
| View original record | 5.10.23. COMPARISON OF GOSHAWK 11. & 40/50 HP. RADIATORS. ============= Assumption for comparison. That the heat given out to cooling water per B.H.P. generated at 20 m.p.h. is the same for both… | ||
| Scan33 | Comparison table of radiator performance metrics for various cars, ranked by merit. | ||
| View original record | COMPARISON 1000 LITRE DISPLACEMENT PER MILE ON DIRECT DRIVE BASIS. [TABLE 1] Header 1: Car. Order of merit. Header 2: Area of matrix face per 1000 ltr. displ: per mile. ins. Data: Fiat. | 110.0… | ||
| Scan34 | Comparison of various car radiators based on litre displacement. | ||
| View original record | COMPARISON ON LITRE DISPLACEMENT BASIS TABLE 1: Car. Order of merit. Area of matrix face per litre displ: sq.in. Fiat. - 207 R-R 20 HP. - 131 Panard. - 111 Bentley. - 111 Delage. - 98.7 Isotta. - 92.0… | ||
| Scan35 | Filing system label with printed categories for car models and handwritten/stamped details. | ||
| View original record | TYPE C CAR. 40/50 ROLLS R HISPANO SUISA 38 H DERBY W.A.H 3.10.23 | ||
| Scan36 | The fitting of an improved camshaft to Trials Cars for increased performance. | ||
| View original record | To BJ. from Hs. c. to PN. c. to EP. c. to Wor. ORIGINAL. IMPROVED CAMSHAFT. X4229 We suggest it might be considered advisable for some of our Trials Cars to be fitted with the improved Camshaft which… | ||
| Scan37 | Secret internal memo about potential boiling issues with the E.A.C. radiator. | ||
| View original record | To R. from Hs: c. to CJ. S E C R E T. ORIGINAL Hs4/LG8.10.23. E.A.C. - RADIATOR. X9250 X766 With reference to our report Hs3/LG5.10.23 giving comparison of radiators. Attached are the figures for the… | ||
| Scan38 | Comparison of matrix and core surface areas relative to litre displacement. | ||
| View original record | E. A. C. COMPARISON OF LITRE DISPLACEMENT. | Area of matrix face per litre displ: | Surface of core per litre displ: | Surface of core per litre displ: per inch. of depth. | |---|---|---| | 66.0… | ||
| Scan39 | Secret report detailing progressive tappet sticking and valve seating issues on an E.A.C. engine. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. ORIGINAL SECRET. ^ E. A. C. ENGINE. X9770 X9060 The sticking of the tappets has gradually got worse on this engine until we found on one cylinder, they were sticking… | ||
| Scan40 | Technical assessment of Springfield electrical equipment, including Westinghouse and American Bosch components. | ||
| View original record | To R. from EPC. c. CJ. EFC4/T8.10.23. ORIGINAL RE SPRINGFIELD ELECTRICAL EQUIPMENT. X3966 X4276 Answering your M.2/M20.9.23. (1) Without at the moment going into all the pros and cons, which I do not… | ||
| Scan41 | Fitting a set of front wheel brakes to an axle for a 40/50 chassis to check clearances. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to Da. BY: S E C R E T. ORIGINAL E.A.C-S. X9940 Hs8/LGS.10.23. We have a set of front wheel brakes fitted to an axle suitable for 40/50 chassis. The axle with… | ||
| Scan42 | Measuring frame deflection on a 20 HP frame with a static load. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ. WCR. By E Da. OY Expl. No. X4260 X4428 REF. Hs3/LG10.10.23. OBJECT OF TEST. To measure frame deflection on 20 HP.… | ||
| Scan43 | Blank, folded sheet of aged paper with punch holes. | ||
| View original record | ", | ||
| Scan44 | Dispatch of a wooden model for the E.A.C.1 Universal Joint. | ||
| View original record | Da. from Hs. S E C R E T. ORIGINAL Hsl/LG11.10.23. X9340 E.A.C.1. UNIVERSAL JOINT MODEL. We are sending to you a wooden model of the E.A.C.1 Universal Joint. Hs. | ||
| Scan45 | Goshawk-II engine mounting tests, discussing vibration reduction and suspension configurations. | ||
| View original record | R.R. 492A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. c. to C. c. to P. c. to HY. ORIGINAL Expl. No. 634 REF: Hs8/LGl.10.23. ENGINE MOUNTING. X634 We attach herewith a further… | ||
| Scan46 | Test report comparing different engine mounting configurations and their resulting vibrations. | ||
| View original record | Hs5/LG11.10.23 -2- 11.10.23. TEST NO. | ENGINE MOUNTING. | VIBRATIONS. ---|---|--- 13 | Engine supported on centre of crankshaft - weight changed from position underneath engine to side position. |… | ||
| Scan47 | 10,000-mile test of a 20 HP production chassis, number 79-AO. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL Expl. No. 4594 REF: HES/LC11.10.23. EXPERIMENTAL REPORT. To 10,000 MILES TEST ON 20 HP. PRODUCTION CHASSIS - 79-AO. Attached herewith is a record of… | ||
| Scan48 | Log of vehicle adjustments and remarks made during a 10,000-mile test. | ||
| View original record | DETAILS OF ALL ADJUSTMENTS MADE ON 10,000 MILES. ADJUSTMENTS. Tappets adjusted every 2000 miles. Plugs adjusted every 2000 miles. Fan belt adjusted at 1200 miles - 2000 miles - 4600 miles - new link… | ||
| Scan49 | Faults and parts replaced during a 10,000 miles test. | ||
| View original record | DETAIL OF FAULTS ON 10,000 MILES TEST. PARTS REPLACED. Cork disc for Bijur Clutch. Exhaust blows from manifold joints - 3 washers fitted. Fan belt broken - new link fitted. FAULTS. Air valve sticking.… | ||
| Scan50 | Performance data table for a 20 HP chassis (79-AO) during a 10,000-mile test. | ||
| View original record | PERFORMANCE OF 20 HP. CHASSIS (79-AO) DURING 10,000 MILES TEST. Start. 1000 2000 3000 4000 5000 6000 7000 8000 9000 Finish. After decarbonising. Speed. 53 53¼ 53 53¼ 52½ 53 53¼ 53½ 54 54 55 57.5 HILL… | ||
| Scan51 | On experiments proving a Goshawk dynamo fault can be caused by a sticking negative brush. | ||
| View original record | M ORIGINAL To R & R. from EFC. c. CJ. & PH. c. EY. EP. DA. EFC4/T12.10.23. X.4383 - GOSHAWK DYNAMO. ------------------------ We have now completed experiments proving the suggestion contained in our… | ||
| Scan52 | Experiment report on the effect of a sticking negative brush on a Goshawk dynamo. | ||
| View original record | EFC. AB.88. 4th Oct. 1923. X.4383 - GOSHAWK DYNAMO - EFFECT OF STICKING NEGATIVE BRUSH. An experiment has been made on machine E to reproduce overheating due to a sticking negative brush, whilst… | ||
| Scan53 | Test report on the overheating of a Goshawk dynamo, detailing issues with a negative brush and commutator. | ||
| View original record | EFC. AB.88 10th Oct. 1923. X.4383 - FURTHER OVERHEATING TESTS OF GOSHAWK DYNAMO. Some further running of dynamo E, with the negative brush sticking has been carried out. The machine was heat… | ||
| Scan54 | On an E.A.C. engine tappet modification to resolve sticking issues, which destroyed exhaust valves, and a comparison of three carburettors. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. ORIGINAL SECRET. Hs1/LG15.10.23. E.A.C. ENGINE. X9770 X9060 Since we have modified the tappets so that they pull down on to a collar, we have had no further trouble… | ||
| Scan55 | Engine mounting tests for the 2-Goshawk-11 and Marson cars. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL. Expl. No. 634 REF: E2/MS/10.10.23. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to E. c. to Da. c. to EY. ENGINE MOUNTING. We have now tested… | ||
| Scan56 | Investigations into the compression diagram of a Goshawk 11 engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL Expl. No. 4225 4580 REF:Hs/Rm/LGM.17.10.23. EXPERIMENTAL REPORT. To R. from Hs/Rm. c. to CJ. c. to E. c. to EY. c. to Da. c. to OY. X4225 C4580… | ||
| Scan57 | G.I. compression diagram chart showing pressure against crank angle. | ||
| View original record | GI COMPRESSION DIAGRAM 2000 R.P.M. SPRING RATING 21.2 LBS/□" AVERAGE DIAGRAM COMPR'N PRESSURE 97.5 LBS/□" LBS/□" ABOVE ATMOSPHERIC 100 75 50 25 10 C.C. ATMOS. PR. LINE 0 10° 20° 30° 40° 50° 60° 70°… | ||
| Scan58 | Indicator tests performed on a Goshawk-11 engine fitted with a 110° camshaft. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 4229 4580 REF.Hsl/LG19.10.23. OBJECT OF TEST. Indicator Tests on Engine.… | ||
| Scan59 | Petrol consumption, mechanical efficiency, and high piston friction for the Goshawk 11 engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expt. No. 4229 4580 REF: Hsl/LG19.10.23. from the petrol consumption which was taken with an ordinary flow meter. Under the… | ||
| Scan60 | The reliability and efficiency tests conducted on an E.A.C.1 engine. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. X.9771 REF. Hs2/LG19.10.23. OBJECT OF TEST. Tests on E.A.C.1 for reliability… | ||
| Scan61 | The performance and condition of an R.A.E. engine after 148 hours of running. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9771 REF: Hs/LG19.10.23. REPORT ON PERFORMANCE AND CONDITION OF R.A.E. ENGINE AFTER 148 HRS. RUNNING. The engine has now run… | ||
| Scan62 | Observations during a 32-hour endurance run, focusing on valve failures, valve spring issues, and oil leaks. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT Expl. No. 9771 REF: HES/LGT.19.10.23. OBSERVATIONS DURING 32 HRS. ENDURANCE RUN. VALVES. Exhaust valves (45° tulip - Quickstep steel)… | ||
| Scan63 | Engine component conditions and issues after an endurance test. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9771 REF: Hs2/7/19.10.23. teeth. The suction at the point 'p' indicated in sketch amounts to approximately .100" water but… | ||
| Scan64 | Oil leak, oil consumption rates, and an issue with the exhaust manifold. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9771 REF: HM2/LW19.10.23. aluminium crankcase exceeding that of the pinion shaft. FIBRE WASHER BRONZE BUSH ADJUSTING WASHER A… | ||
| Scan65 | Wear on the oil pump, distributor drive, and main bearings. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9771 REF: HES/LGT.19.10.23. OIL PUMP. The bearings in the brass casing were badly worn and seem to be small for the pressures.… | ||
| Scan66 | Summary of test results for Goshawk dynamo brushes made from various materials, comparing them to the standard Le Carbone brushes. | ||
| View original record | ORIGINAL. EFC4/T20.10.23. To R. from EFC. c. OJ. X.4333 - GOSHAWK DYNAMO BRUSHES, IN VARIOUS MATERIALS. Answering your RL/M18.10.23, this series of tests is now being completed and a complete report… | ||
| Scan67 | Road tests on front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs1/LG20.10.23. SECRET. To R. from Hs. c. to CJ. c. to Da. c. to EY. ROAD TESTS ON FRONT WHEEL BRAKES. We… | ||
| Scan68 | The effects of backward pivot lean, braking torque, and spring twist on steering performance and wobbles. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Exptl. No. 9940 REF: Hs1/LG20.10.2 allowing the pivots to lean forward so that when the steering wheels were turned, the weight of the… | ||
| Scan69 | Brake pedal pressure, wrapping action, and the effect of front brakes on steering geometry. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hsl/1/220.10.23 We think in the case of emergency, it is difficult to estimate what pressure the driver would put on… | ||
| Scan70 | Front wheel brakes, detailing axle twist under load and the resulting movement. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H.D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 9940 REF: Hs/Rm/L/620.10.23. To R. from Hs/Rm. c. to CJ. c. to Da. c. to HY. c. to Rs. S E C R E T. FRONT WHEEL BRAKES.… | ||
| Scan71 | Secret memorandum on road test results for front wheel brakes, noting issues with 'jaggers' and torsional effects. | ||
| View original record | ORIGINAL To R. from Hs. S E C R E T. c. to CJ. c. to De. c. to DY. c. to Rg. Hs3/LC22.10.23. FRONT WHEEL BRAKES. Y9940 We have made a further test on the road with the chassis fitted with front wheel… | ||
| Scan72 | The comparative tests of Goshawk dynamo brushes in various materials for the 20 HP engine. | ||
| View original record | TO R. & E. from EFC. c. CJ. & BJ. c. EY. EP. DA. ORIGINAL EFC6/T22.10.23. X.4333 - 20 H.P. DYNAMO BRUSHES IN VARIOUS MATERIALS. Comparative tests of Goshawk dynamo brushes in various materials have… | ||
| Scan73 | Results of wear tests on Standard 'Z' Le Carbone and ECO Morganite brushes. | ||
| View original record | Contd. -2- EFC6/T22.1033. resistance, was caused to start, run slowly for a short while, accelerate to a high speed, and then stop for a few seconds, repeatedly, the period being such that about three… | ||
| Scan74 | Test report comparing the performance and wear of various types of brushes. | ||
| View original record | Contd. -3- EFCS/T22.10.23. EG2 Morganite Brushes. This set ran more smoothly and the positive brush is polished over the leading three-quarters of its surface. The control brush, which sparked more… | ||
| Scan75 | Performance and wear of various main and control brushes during testing, with a table summarizing the results. | ||
| View original record | Contd. -4- EFC6/T22.10.23. These main brushes were afterwards run with an EG.60 control brush, but during the test, the brush gear broke up, and the brushes were spoiled (the breakage being traced to… | ||
| Scan76 | Report comparing the performance and wear of various types of commutator brushes. | ||
| View original record | Contd. -5- EFC6/T22.10.23. It will be seen that the best results generally were obtained with our standard Z brushes and the Morganite +++ ++ ECO and EG2, the running of which is considered to be… | ||
| Scan77 | Proposal and explanation of the E.A.C. semi-earthed chassis electrical system. | ||
| View original record | To R & E. from EFC. c. CJ & BJ c. EY. EP. DA. c. WOR. OY. X.9960 - E.A.C. CHASSIS ELECTRICAL SYSTEM. We should like again to put before you for your consideration, more particularly in connection with… | ||
| Scan78 | List of points in favour of a suggested electrical system, detailing fuse arrangements and protections. | ||
| View original record | Contd. -2- EFC4/T24.10.23. We suggest that the points in favour of such a system are:- (1) Battery ignition current may be used, passing to earth in the usual and simpler way. (2) Single pole lamps… | ||
| Scan79 | The disadvantages of an electrical system, comparing it to the existing Goshawk system. | ||
| View original record | Contd. -3- EFC4/T24.10.23. The same can also apply to the body lights, if desired, and as regards its applicability to the horn circuit it seems immaterial to which side of the fuse the current… | ||
| Scan80 | Wiring diagram for a semi-earthed electrical system. | ||
| View original record | DIAGRAM OF SEMI-EARTHED ELECTRICAL SYSTEM STARTER MOTOR RELAY CIRCUIT IGNITION LAMPS LAMPS HORN BODY LIGHTS. DISTRNG FUSES. INSP LAMP PLUG SOCKET INSTR LAMP CHARGING SWITCH FIELD FUSE DYNAMO F CUT-OUT… | ||
| Scan81 | Front wheel brake testing, detailing issues with brake jaggering and attempted modifications. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to Rg. c. to Ds. c. to BY. ORIGINAL Expl. No. 9940 REF: HS4/L029.10.23. S E C R E T. FRONT WHEEL BRAKES.… | ||
| Scan82 | The ineffectiveness of 4-wheel brake systems on competitor cars like Isotta and Delage. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Exptl. No. 1059 REF: Hsl/LG26.10.23 To R from Hs. c. to CJ. c. to Da. c. to BY. c. to Rg. S E C R E T. 4-WHEEL BRAKES. X9940 X1559 From… | ||
| Scan83 | The handling dangers of front-wheel brakes, specifically concerning front-wheel skid during cornering. | ||
| View original record | R.R. 493A (40 H) (SL. 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: HMA/L.S.S.10.23. might be serious. The fact of the turning circles on the 40/50 being increased from 47 ft. and 50… | ||
| Scan84 | 4-wheel braking systems, skidding, and servo-assisted brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/1/1026.10.23. more effective braking under normal conditions with safety if we sacrifice front wheel braking on… | ||
| Scan85 | Road tests on front wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. SECRET Expt. No. 9940 REF: HBS/LG27.10.23. EXPERIMENTAL REPORT. ORIGINAL To R. from Hs. c. to CJ. c. to Ds. c. to Rg. c. to EY. ROAD TESTS. FRONT WHEEL… | ||
| Scan86 | Braking and steering performance based on different radius rod ball positions. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/L027.10.23. (1) 2" below centre of radius rod ball on axle. (2) 3½" " " " " " " " " (3) 6½" " " " " " " " " These… | ||
| Scan87 | The performance differences of a 20 HP engine with various brands of petrol. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. X14134 X976 X/555 OBJECT OF TEST. To observe difference in performance of 20… | ||
| Scan88 | Comparative tests with different grades of petrol to determine difference in 'loading up' at low speed. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs5/LG25.10.23. COMPARATIVE TESTS WITH DIFFERENT GRADES OF PETROL TO DETERMINE ANY DIFFERENCE IN 'LOADING UP' OR MIXTURE… | ||
| Scan89 | Performance comparison of 20 HP cars using various brands of petrol, detailing hill climb and level speed test results. | ||
| View original record | COMPARISON OF PERFORMANCE ON 20 HP. CARS - 4-G-11 - 3-G-11 AND 79-AO. (10.000 MILES TEST CAR) - WITH VARIOUS BRANDS OF PETROL. Chassis No. Test. Shell No.1. Shell Mex. Red Line. 4-G-11. Time on hill… | ||
| Scan90 | The standardisation of torque reaction vibration dampers for 40/50 HP and 20 HP models. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to Da. c. to BY. ORIGINAL Hsl/LG27.10.23. TORQUE REACTION VIBRATION DAMPERS. Xu604 We find that we obtain the same degree of improvement with these dampers on the… | ||
| Scan91 | The E.A. C.1 engine, detailing fuel distribution issues and camshaft comparisons. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 9970 REF: HS/L.1629.10.23. To R. from Hs SECRET. c. to CJ. c. to E. E. A. C.1 ENGINE. We attach herewith a power… | ||
| Scan92 | Graph showing power output and consumption for an engine with a KNAVE carburettor, including a valve timing diagram and test conditions. | ||
| View original record | E.A.C. POWER OUTPUT & CONSUMPTION WITH KNAVE CARBURETTER. (PET CON BY DIRECT MEASUREMENT). BAR = 754 M/M PETROL. SHELL MEX AIR TEMP = VALVE TIMING NO 3 PLANET ON CAMSHAFT .010" TAPPET CLEAR. Diagram… | ||
| Scan93 | Proposed semi-earthed electrical system for Goshawk units. | ||
| View original record | To R A E. from EPC. c. CJ. c. EX. MP. ORIGINAL EFC1/T29.10.23. X.9860 - SEMI-EARTHED ELECTRICAL SYSTEM WITH GOSHAWK UNITS SUGGESTED FOR E.A.C. Herewith please find small photostat diagram which has… | ||
| Scan94 | Wiring diagram of a vehicle's electrical system featuring a dynamo, switchbox, ammeter, battery, and various lamps. | ||
| View original record | Goddard & Co, BASE, GREEN and WHITE SIDE, Switchbox, Head LAMPS, RED, BLACK, GREEN, BLUE, GREY, Spare wire, to horn Push Button, Original AY/36, Dynamo, +, -, A, B, C, D, Red and Black to +, Black to… | ||
| Scan95 | Capacity-temperature tests of 20 HP battery ignition condensers. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. BY. EP. WOR. c. DA. ORIGINAL EFC3/T29.10.23. X.4430 - CAPACITY -TEMPERATURE TESTS OF 20 H.P. BATTERY IGNITION CONDENSERS. Further to our EFC1/T13.7.23, we have now… | ||
| Scan96 | Report page detailing the testing of condenser capacity and leakage at various temperatures. | ||
| View original record | Contd. -2- EFC3/T29.10.23. long as leakage is absent, but only apparent capacities at points on the curves above the points marked L, i.e. roughly speaking above temperatures of about 45°C. Above this… | ||
| Scan97 | Temperature testing procedures and observations for different groups of condensers. | ||
| View original record | Contd. -3- EFC3/T29.10.23. (d) & (e) The temp. was again raised to 55°C, whilst a few observations were taken, and then continued up to 70°, after which it was allowed to fall to 45°C, observations… | ||
| Scan98 | Performance and stability tests of various condensers under different conditions. | ||
| View original record | Contd. -4- ( EFC3/T29.10.23.) The following remarks with reference to the particular condensers specially tested may be made. Condenser No.31. Previous to undergoing the temperature test the capacity… | ||
| Scan99 | The performance and temperature-related capacity variations of various condensers. | ||
| View original record | Contd. -5- EFC3/T29.10.23. to the same degree. The condenser is previous standard, but below production limits in initial capacity. Liberty Condenser. The results of the Liberty condenser are… | ||
| Scan100 | Analysis of condenser temperature-capacity curves under varying thermal conditions. | ||
| View original record | Contd. -6- EFC3/T29.10.23. but to be quite a lot raised if the condenser is taken through a cycle of temperature, taking it up to 70°C, or so, after which cycle there is a tendency for the curve for… | ||
| Scan101 | Technical analysis of condenser capacity changes due to temperature cycles. | ||
| View original record | Contd. -7- EFC3/T29.10.23. is instanced by condenser No.32. On the cycles of temperature experienced on the chassis, the tendency will be for the average capacity of such a condenser at 18°C to be… | ||
| Scan102 | Production difficulties and testing of condenser capacities, leakage, and temperature variation. | ||
| View original record | Contd. -8- EFC3/T29110.23. those for which the temperature is increasing. Then again it must be borne in mind that at the higher temperatures a fair proportion of the current is leakage, though this… | ||
| Scan103 | Graph showing the variation of capacity with temperature for paper condensers. | ||
| View original record | VARIATION OF CAPACITY WITH TEMPERATURE OF PAPER CONDENSERS C Nº 31 STANDARD CONDENSER PREVIOUS TO IMPROVEMENTS IN CONNECTIONS Nº 32 " " " " " " AND TESTED FOR THE SECOND TIME Nº 32 Nº 31 CAPACITY… | ||
| Scan104 | Graph showing the variation of capacity with temperature for different paper condensers. | ||
| View original record | VARIATION OF CAPACITY WITH TEMPERATURE OF PAPER CONDENSERS D. N°741 N°741 MADE UP WITH VARNISH BETWEEN LAYERS OF PAPER, OTHERWISE STANDARD. LIBERTY. CONDENSER TAKEN FROM LIBERTY IGNITION SET, FIRST… | ||
| Scan105 | Graph showing the variation of capacity with temperature for different paper condensers. | ||
| View original record | VARIATION OF CAPACITY WITH TEMPERATURE OF PAPER CONDENSERS Nº 774 E. Nº 774 MADE UP WITH VARNISH BETWEEN LAYERS OF PAPER. OTHERWISE STANDARD LIBERTY CONDENSER TAKEN FROM LIBERTY IGNITION SET. SECOND… | ||
| Scan106 | Graph showing the variation of capacity with temperature for different types of paper condensers. | ||
| View original record | VARIATION OF CAPACITY WITH TEMPERATURE OF PAPER CONDENSERS E Nº 30 Nº 30 STANDARD CONDENSER PREVIOUS TO IMPROVEMENTS IN CONNECTIONS MICA 40/50 MICA CONDENSER CAPACITY (MFDS) 2.0 1.8 1.6 1.4 1.2 1.0 | ||
| Scan107 | The lubrication of the universal joint at the back of the gearbox. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expt. No. 4348 REF: HsS/LCSO.10. 23. V3324 V4326S To R. from Hs. c. to CJ. c. to E. c. to BY. c. to EP. c. to OY. LUBRICATION OF… | ||
| Scan108 | Joint lubrication, comparing oil versus grease and considering conditions for American customers. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 4348 REF: Hs3/LG30.10.23. joints were well lubricated. On the present standard cars which we are making, the oil does not stay… | ||
| Scan109 | Chassis load distribution for experiments on Goshawk tie-bars. | ||
| View original record | TO BY. FROM DA/EV. c. to HS. DA/EV3/M1.10.23. EXPERIMENTS ON GOSHAWK TIE-BARS. X4260 We do not think the loading used in the exper- -iments (a drawing of which HS. left with us) is quite a… | ||
| Scan110 | Confirmation of a telegram regarding the revision of commutator LeC.1735. | ||
| View original record | CONFIRMATION OF TELEGRAM. ORIGINAL WEST WITTERING. 2. 10. 23. CLARKE. ROYCAR. DERBY. WE ARE REVISING COMMUTATOR LeC.1735. TO SUIT TWO CONDUCTORS.PER SLOT. ELLIOTT. | ||
| Scan111 | Engine mounting experiments, including a new two-arm mounting scheme and damper placement. | ||
| View original record | R.R. 235a (100 ?) (S.H. 159 11-8-20) G. 2800 TO HS. FROM E. cc to C.L. ORIGINAL SECRET. E. A. C. ENGINE MOUNTING EXPERIMENTS. Referring to your memo. HS11/LG11023. we note you are about to try the… | ||
| Scan112 | Engine vibration reduction through a trussed or stiffened frame and alternative engine mounting. | ||
| View original record | To Hs. from R. c. to Rg. CJ. E. c. to Da. BY. COPY. ORIGINAL R/LG. 3.10.23. RE. ENGINE VIBRATIONS. X634 Very pleased with demonstration at Hammersmith last week, but I have not seen further sheets you… | ||
| Scan113 | Memo discussing engine vibrations, potential improvements with trussed frames, and travel arrangements. | ||
| View original record | A/c from R C. to E, Rg, Cj, Da, By. Re Engine Vibrations X634 Very pleased with demonstration at Hammersmith last week, but I have not seen further sheets you have issued. Believe we shall get still… | ||
| Scan114 | Secret memo from 'R' suggesting engine testing procedures and preparations for chassis fitting. | ||
| View original record | copy of original. ORIGINAL late HS. from R. [Note: 'HS.' is crossed out] copies to :- Rs. E. CJ. S E C R E T. R/LG. 3.10.23. x9950 x9720 Mr. A. C. Have not seen any sheets re. tests of this engine… | ||
| Scan115 | Memo discussing the BAC engine, its testing, and installation on a chassis. | ||
| View original record | Note from R Secret c & Rs. E, C, J. BAC engine X9770 X9940 Have not seen any tests re this engine owing to absence from home. To settle punch & vibes & power at high speed suggest tubing with… | ||
| Scan116 | Engine vibration issues, proposed frame improvements, and logistical arrangements for car transport. | ||
| View original record | C O P Y. Hs. from R. copies to :- E. Rg. CJ. Da. BY. 3.10.23. RE. ENGINE VIBRATIONS. Very pleased with demonstration at Hammersmith last week, but I have not seen further sheets you have issued.… | ||
| Scan117 | Body rattles and frame stiffness, detailing defects found in Goshawk body brackets on 40/50 and Goshawk frames. | ||
| View original record | TO [illegible] FROM DA/EV. c. to [illegible] HS. RE. BODY RATTLES, AND FRAME STIFFNESS. We visited Messrs Hooper's Works on Wednesday last, and made some tests on both 40/50 and Goshawk frames on… | ||
| Scan118 | Technical report discussing solutions for frame twisting and body rattles by proposing revised brackets and additional cross members. | ||
| View original record | (2) (4) That the brackets 2nd & 4th from the dash not being opposite cross members could twist the frame when quite a light load was applied to the end of the wooden lever corresponding to the runner.… | ||
| Scan119 | The design of sheet metal body stiffeners, cross members, and body brackets. | ||
| View original record | (3) on sheet metal body stiffeners we shall go into the question of providing adequate cross members for the body when using this scheme and will take the matter up with Messrs Barker's as soon as we… | ||
| Scan120 | Unexpected deflection curves in Goshawk tie-bars and requesting further testing. | ||
| View original record | TO HS. FROM DA/EV. RE. GOSHAWK TIE-BARS. DA/EV3/M12.10.23. X4260 We thank you for your HS3/LG101023., with blueprint F.52766. The graphs of deflection provided are generally instructive but we cannot… | ||
| Scan121 | Secret internal memo detailing the decision to retain double brakes and adopt a semi-servo system for new gearboxes. | ||
| View original record | TO HS. FROM R. c. to CJ. BJ. PN. S E C R E T. E. A. C. x9310 x9320 x9360 x9940 RE. BRAKES & GEARBOXES. We have decided that we shall retain double brakes on the back axles on all chassis, leaving no… | ||
| Scan122 | Development of an in-house dipping headlight mechanism for the 20 HP model. | ||
| View original record | ORIGINAL TO B.Y. FROM DA/EV. DA/EV1/M13.10.23. c. to Mr. HS. RE. DIPPING HEAD LIGHTS - 20.HP. X4555 We understand that Barker's are still fit-ting a very clumsy and non-mechanical device for dipping… | ||
| Scan123 | Secret memo regarding two gear ratios needed for the E.A.C. back axle. | ||
| View original record | TO BY. FROM R. HS. PA c. to CJ. c. to BJ c. to PN ORIGINAL SECRET. E. A. C. BACK AXLE. X9350 Regarding the above, two gear ratios will be needed, namely, 25 to 27 M.P.H. at 1000., and about 29 to 31… | ||
| Scan124 | Design schemes for E. A. C. ignition wiring and 40/50 chassis modifications for torque reaction dampers and front wheel brakes. | ||
| View original record | ORIGINAL TO BY. FROM R. HS. SECRET. E. A. C. R2/M13.10.23. c. to CJ. Bd. We have sent you this week the following schemes:- (complete designs.) E. A. C. Ignition wiring, shewing the complete system of… | ||
| Scan125 | Modifications to the Goshawk frame, including new brackets, improved cross members, and trussing. | ||
| View original record | ORIGINAL TO BY. FROM R. HS. c. to CJ. BJ. IHS. RE. GOSHAWK FRAME. 44260 44604 We have in hand new frame brackets for the Goshawk chassis, for carrying the body. The present frame brackets were only… | ||
| Scan126 | Modifications to the EAC gearbox, engine support, and valve tappets. | ||
| View original record | ORIGINAL TO H.S. FROM R. c.c. to C.J. S.J. S E C R E T. E. A. C. POWER UNIT. R4/M13. 10. 23. Handwritten: X9310 (struck through) X9770 X9335 (struck through) X9060 We are arranging to modify the EAC.… | ||
| Scan127 | Secret memo detailing the specifications for the windings of the X.9620 starter motor. | ||
| View original record | R.R. 225A (100 T) (S.H 159, 11-8-20) (S. 2500) ORIGINAL 2. TO EFC. FROM R. S E C R E T. R1/M13. 10. 23. E. A. C. X.9620. STARTER MOTOR. Referring to your memo. EFC5/T51023., we now understand that… | ||
| Scan128 | Comparing the engine mounting and performance of a Marmon chassis with the Goshawk model. | ||
| View original record | TO HS. FROM R. c.c. to CJ. ORIGINAL ENGINE MOUNTING. Y4604 Referring to your report HS2/LG131023., there are probably two things making the difference between the "Marmon" and our Goshawk. One is the… | ||
| Scan129 | Objections and improvements to a scheme for fitting a magneto to a 20 HP car. | ||
| View original record | TO BY. FROM E. c. to HS. RE. FITTING MAGNETO TO 20.HP. CAR. X4327 In reply to your memo. BY1/P101023., we had two objections to your scheme - one was that the H.T. conductor was trailed over the… | ||
| Scan130 | Examination of a wooden model for universal joints and potential modifications. | ||
| View original record | TO HS. FROM DA. SECRET DA1/M16.10.23. E. A. C. 1. UNIVERSAL JOINTS. X9340 We have examined the wooden model and it appears to be satisfactory from the point of view of assembling, and from the… | ||
| Scan131 | Gearbox design for the Goshawk model to accommodate side levers and four-wheel brakes. | ||
| View original record | TO GA. FROM R. c. to BH. RG. c. to HCH. PX. c. to HS. ORIGINAL RE. GOSHAWK. GEARBOX FOR SIDE LEVERS & 4 WHEEL BRAKES. X 5940 X 4247 Referring to your memo. regarding four wheel brakes for Goshawk, we… | ||
| Scan132 | Confirming Mr. Royce's agreement to adopt a one-piece forging for the fan drive pivot and spindle. | ||
| View original record | TO BY. FROM E. c. to HS. ORIGINAL E3/M16.10.23. LeC. 1753. PIVOT & SPINDLE FOR FAN DRIVE. X4237 X3438 In reply to your memo. BY2/P20923., recently received, please note Mr. Royce agrees to adopting… | ||
| Scan133 | Technical memorandum discussing the stress calculations for bolts with forced-on collars. | ||
| View original record | [Handwritten] R T H C TO BY FROM R. c. to HS. [Stamped] ORIGINAL RE. BOLTS WITH FORCED ON COLLARS. [Handwritten] K1334 In reply to your BY1/P21023., it is assumed to begin with that a short length of… | ||
| Scan134 | The design for accessibility and maintenance of the E.A.C. and Goshawk engines. | ||
| View original record | ORIGINAL TO SJ. FROM R. S E C R E T. R2/M17.10.23 C. to WGR. C. to HW. C. to HS. E. A. C. AND GOSHAWK ENGINES. x9770 x4219 We have gone further than most designers to make the engine units accessible.… | ||
| Scan135 | Proposed design changes to the back axle, gearbox, and engine. | ||
| View original record | TO BY. FROM R. c. to CJ. c. to WGR. c. to RG. c. to HS. SECRET ORIGINAL E. A. C. 1. X9720 Naturally it is proposed that we complete this as designed. We do not think however this will be the final… | ||
| Scan136 | Proposing an automatic ignition advance mechanism using a governor and hydraulic pressure. | ||
| View original record | H.R. 235a (100 T) (S H. 159 11-8-20) G. 2800 TO HS. FROM R. EFC. c.c. to OJ. IGNITION ADVANCE. X.3949 x928 X.9780 Owing to the greater range of ignition timing required by the EAC. the relationship… | ||
| Scan137 | Very poor assessment of a competitor's Isotta-Fraschini car, listing numerous faults. | ||
| View original record | TO GJ. FROM R. c. to HS. RE. ISOTTA-FRASCHINI. X4214 X4609 This car is a very poor one and I suggest we sell it before we soil it. The trouble appears to be with the head of the Technical Dept. rather… | ||
| Scan138 | Proposing an automatic, governor-controlled ignition advance mechanism. | ||
| View original record | TO HS. FROM R. EFC. c. to CJ. ORIGINAL R2/M18.10.23. 2 IGNITION ADVANCE. X3944 X928 X9780S Owing to the greater range of ignition timing required by the EAC. the relationship between the magneto and… | ||
| Scan139 | Memo regarding chassis modifications, parts finishing and delivery schedule for an Allweather car. | ||
| View original record | To Hs. from Ev. ORIGINAL 18-10-23 Re Allweather, 5-G-II. X3730 We shall be pleased to have tie-bars fitted to this chassis whilst it is in Derby for engine repair. Whilst we have practically completed… | ||
| Scan140 | Secret memo detailing chassis modifications to fit a new engine, including lengthening front springs and repositioning the radiator. | ||
| View original record | TO BX. FROM R. SECRET RL/M19.10.23. c. to [strikethrough]CJ. RH.[/strikethrough] HS. E. A. C. 11. X9970 In fitting this engine to the present chassis there is about 2" of room to spare. As we do not… | ||
| Scan141 | Modifications to fan draught, matrix size, and front spring stiffness due to front-wheel brakes. | ||
| View original record | (2) advantageous to the fan draught, and the required extra area will be obtained by making it about higher inches in the matrix. Drawing shewing all this will be sent in a few days. You will remember… | ||
| Scan142 | Suggestion to standardise experiments on body parts related to the chassis, involving coachbuilders in the process. | ||
| View original record | ORIGINAL TO LIS. FROM DA/EV. c. to R. HS. DA/EV4/M19.10.23. X3660 X3730 X3729 RE. STANDARDISATION OF BODY PARTS CONCERNED WITH THE CHASSIS. We suggest that experiments on body parts in which RR. are… | ||
| Scan143 | Proposed improvements to Goshawk II body brackets, requesting a trial of the new design. | ||
| View original record | TO BY. FROM DA. C. to CH. C. to LHS. C. to HS. ORIGINAL DA1/M22.10.23. GOSHAWK II. BODY BRACKETS ETC. V3730 Herewith we send N.scheme 1480, showing improvements in the body brackets to prevent… | ||
| Scan144 | Telegram from Royce rejecting a suggestion for a forward running brake and providing alternative instructions for a pull lever system. | ||
| View original record | ROLLS-ROYCE LTD. RR 144A (20BKS.) (SK 871 23-5-23) MP 272631 ORIGINAL F.D X9940 TELEGRAM RECEIVED BY TELEPHONE. Time Received 5-12 Date 22-10/25 To Rospa's Derby By Nold from Chichester H-3H [Message… | ||
| Scan145 | Telegram regarding suggestions for cancelling bodies and a method for applying brakes. | ||
| View original record | ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. X9940 F.D. 22 OCT 1923 RECEIVED Time Received 3-55 Date 22-10/23 To Ray Derby By WGA from Chichester 2-HD Routledge and Hines my Suggestions cancelling… | ||
| Scan146 | Telegram received by telephone with handwritten instructions about pulleys, levers and rods. | ||
| View original record | ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. RR 144A (50BKS.) (BK 671 23-5-23) MP 272631 Time Received Date To By from 2 by inserting levers and slimming wind rope towards pulley stop anticipated… | ||
| Scan147 | Telegram received by telephone with instructions to modify a suspension spring system. | ||
| View original record | ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. RR 144A (20BKS.) (BK 971 23-5-23) MP 272621. Time Received. Date. To. By. from 3. above ground another eighteen inches Stop try present scheme with… | ||
| Scan148 | Telegram message received by telephone regarding the positioning of vertical axle rods. | ||
| View original record | instead of one the vertical rods being about six inches in front of and behind axle stop wire any result of any test on telephone FROM Royce | ||
| Scan149 | Responding to a report on front wheel brakes and outlining policy adjustments. | ||
| View original record | TO C.S. FROM R. c. to R.V. (struck through) c. to H.S. R2/M23.10.23. X 9940 X 1559 RE. FRONT WHEEL BRAKES. Referring to Mr. Hives' first report I do not think we need alter our policy because of this.… | ||
| Scan150 | Revised scheme for 20 HP body stiffeners, including design modifications and coordination with coachbuilders. | ||
| View original record | TO SY. FROM DA. RHC ORIGINAL DA1/M31. 10. 23. c. to HS. 20.HP. BODY STIFFENERS. X4260 X3730 X3522 We send you herewith N.scheme 1490. shewing a revised scheme of body stiffeners superseding… | ||
| Scan151 | Technical memorandum discussing issues and proposed solutions for front wheel brake judder, known as 'jaggers'. | ||
| View original record | R.R. 235A (100 T) S.H. 159 11-8-20) G. 2606 ORIGINAL TO HS. FROM R. c.c. to CJ. RE. FRONT WHEEL BRAKES. X9940 X1559 Referring to your 2 reports, and my 3 telegrams. You will notice that I have… | ||
| Scan152 | Improvements and issues with brake systems and steering wobble. | ||
| View original record | (2) BRAKES TO DEFINITELY WIND OFF. You will notice in my 3rd telegram that by inverting the levers and using a vertical push rod we ought to get a definite release of the brake pressure with the… | ||
| Scan153 | Confirmation of a telegram detailing instructions to fix issues described as 'Jaggers' and 'Wobbles'. | ||
| View original record | ORIGINAL CONFIRMATION OF TELEGRAM. WEST WITTERING 24. 10. 23. Y9940 HIVES. ROYCAR. DERBY. IF CAUSE OF JAGGERS IS WIND ON USE AMPLE WIND OFF THEN IF JAGGERS BACKWARD REDUCE TO MINIMUM USE STIFF ROAD… | ||
| Scan154 | Design of front wheel brakes, including the use of radius rods and shock dampers. | ||
| View original record | TO RS.) FROM R. HS.) c.c. to OJ. PJ. WOR. c.c. to Mr.Claremont. R1/M24. 10. 23. RE. FRONT WHEEL BRAKES. X9940 X1559 (1) In reference to Mr. Johnson's memo. I do not anticipate any very serious extra… | ||
| Scan155 | Damping, the use of aluminium for brake drums, and the effects of front brakes on steering. | ||
| View original record | (2) car is a fast one, and requires a large amount of friction damping. I had suggested strangely enough both the use of double dampers specially arranged so as to damp torsional vibrations of the… | ||
| Scan156 | American alterations, including consent from Mr. Royce for a simplified method of locking a screwed bush in the gearbox. | ||
| View original record | TO EP. FROM E. c. to BJ. HS. c. to BY. DA. RE. AMERICAN ALTERATIONS. ORIGINAL E1/M24.10.23. X4605 Concerning your memo. EP1/H91023. we had not overlooked alteration No. 276 - Simplified method of… | ||
| Scan157 | Modified wiring scheme for the Goshawk 11 standby ignition. | ||
| View original record | TO BY. FROM E. c.c. to GJ. c.c. to HS. c. to EFC. ORIGINAL GOSHAWK 11. WIRING FOR STANDBY IGNITION. X4075 We send you herewith drawing No. LeC. 1787., shewing the modified scheme for carrying the H.T.… | ||
| Scan158 | Telegram from Royce regarding a proposal by Bailey to modify a brake servo by splitting the bronze outer sphere. | ||
| View original record | Mr Hives from BY Telegram. Copy. ORIGINAL 26. 10. 23. X9240 BAILEY RE SERVO PROPOSE SPLITTING FRONT HALF OF BRONZE OUTER SPHERE HORIZONTALLY HIVES CONCLUDES WHOLE TROUBLE WITH BRAKES FRONT AND REAR… | ||
| Scan159 | Telegram confirming proposed modifications and tests for the brake servo system. | ||
| View original record | H.R. 235A (100 T) (S H. 159 11-8-20) G. 2600 ORIGINAL CONFIRMATION OF TELEGRAM. COPY FOR HS. WEST WITTERING. 26. 10. 23. ROYCAR. DERBY. X9940 BAILEY - RE SERVO PROPOSE SPLITTING FRONT HALF OF BRONZE… | ||
| Scan160 | From DA to HS regarding the inspection and potential purchase of a Hispano car for testing. | ||
| View original record | R.R. 235A (100 T) (S.H. 159 1-8-20) G. 2800 ORIGINAL. TO HS. FROM DA. DA1/M29.10.23. X9910 X4214 +4609 Mr. Hardy and I went to look at the Hispano car at Barker's last week, but we were not able to… | ||
| Scan161 | Questioning the Sales Conference's decision to drop the idea of luminous instrument dials and asking to continue experimental work. | ||
| View original record | TO SG. FROM DA/EV. c. to LHS. c. to HS. RE. ILLUMINATIONS OF INSTRUMENTS. X4067 Referring to your SG25/BM251023., re the above, we note that the Sales Conference for the time being has decided to drop… | ||