Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | Experiments on new Redmanol encased coils compared to the standard stabalite coils. | ||
| View original record | To R. from EFC. c. CJ. EY. EFC5/T3.6.24. X.4079 - REDMANOL ENCASED COILS. Reference your R2/M29.5.24, we have three Redmanol encased coils of the tall type running on experimental cars. These only… | ||
| Scan1 | Continued memorandum regarding the replacement of a mouldensite encased coil. | ||
| View original record | Contd. -2- EFC5/T3.6.24. these to replace the small mouldensite encased coil which you have at present on 6-EX. You have on 6-EII a tall type coil in a redmanol case, designated 3TG3, but this is not… | ||
| Scan2 | Testing the efficiency of a servo with various cams. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.CJ WOR By E. Da RG Expl. No. 9910-9910 9550 REF. H54/LG4.6.24. OBJECT OF TEST. Tests efficiency of servo with… | ||
| Scan3 | Servo torque multiplication measured on a car. | ||
| View original record | R.R. 433a (20M) (D.A. 852 20-3-24) J.T.D. EXPERIMENTAL REPORT Expl. No. REF: Hs/ACL/LG3. 6. 24. SERVO MULTIPLICATION MEASURED ON CAR. (No. 44-PK.) The torque multiplication of the servo was measured… | ||
| Scan4 | Servo torque multiplication with Ferodo linings, including formulae and a results table. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL/LGZ. 5. 24. ∴ 2.625 / 2 x S . B / 7.9 = B. ∴ s = B/A 2 x 7.9 / 2.625 S . B TORQUE MULTIPLICATION OF SERVO… | ||
| Scan5 | Bodywork failures on a 10,000-mile test car, 98-NK, and communication with coachbuilders Messrs Barkers for a refit. | ||
| View original record | TO HS. FROM DA/EV. DA/EV2/M4.6.24. re. 10,000 miles TEST CARS. [Handwritten:] 49841 49840 With reference to test car 98-NK. on which you have reported in your HSL/LG25524. We have considered this… | ||
| Scan6 | Design changes and progress for a Speed Model chassis and components. | ||
| View original record | TO CJ. BA. HS. FW. FROM R. ORIGINAL SECRET R3/14.6.24. E. A. C. 11. SPEED MODEL. X8770 8770 I assume that CJ. is very anxious that BY. shall be in a position to instruct the material for EAC.2s. at… | ||
| Scan7 | Progress report on alterations and status of the engine, clutch, steering, servo, and gear systems. | ||
| View original record | (2) ENGINE. (Alterations from original.) Longer rods. (Finished.) Exhaust. (Finished.) Two 3s with ejectors. Lower compression. (Finished.) Will be com- (Throttle governor. (In progress. Mr. Jenner.)… | ||
| Scan8 | Technical note detailing an ignition test, switchbox configuration, and magneto type. | ||
| View original record | (3) IGNITION TEST. We shall fit a small extra switch to earth the magneto (in parallel with box) to test if the battery ignition is OK. in positions 2 or 3. This can be anywhere within reach of the… | ||
| Scan9 | Secret memorandum from 'R' to 'E.A.C.' discussing the cancellation of a previous throttle governor and the design of a new one. | ||
| View original record | ORIGINAL TO GT. DJ. HG. HS. DV. ## FROM R. SECRET. R1/14.6.24. E. A. C. THROTTLE GOVERNOR. X9140 I did not think anyone appreciated the advantage of the governor so much - (I doubt if Derby does.) I… | ||
| Scan10 | Diagram of a governor mechanism with hand and foot controls. | ||
| View original record | THIS CAN HAVE ANY SHAPE OR CHARACTERISTIC TENSION GOVERNOR SPRING INCREASE TENSION BY HAND FOR HIGHER SPEED HAND FOOT C.G / 3/14 | ||
| Scan11 | Bodywork failures by coachbuilder Messrs. Barkers on the 10,000 miles test car, 98-NK. | ||
| View original record | To DA/EV. from Hs. ORIGINAL RE. 10,000 MILES TEST CARS. The body which ran on 98-NK. was a Barker body and was fitted up by Messrs. Barkers. The wings and all the attachments were made, supplied and… | ||
| Scan12 | The provision of new wings for a Barker Torpedo, Chassis 98.NK. | ||
| View original record | TO HS. FROM DA/EV. ORIGINAL. DA/EV1/M6.6.24. X9840 re. BARKER TORPEDO - CHASSIS 98.NK.(LK.) We have heard from Messrs Barkers to the effect that as this is a special case they can provide a set of new… | ||
| Scan13 | Tests conducted with a torsional friction damper. | ||
| View original record | EXPERIMENTAL REPORT. ORIGINAL COPIES TO: RCD. WOR By E Da. EP. Pr. Df. RG Expl. No. 9850 4604 REF Hs/LG11.6.24. OBJECT OF TEST. Tests with torsional friction damper. TESTER. W.A. Robotham. CONDITIONS.… | ||
| Scan14 | Further tests with torque control, specifically the torsional movement and vibration of the axle when jaggering. | ||
| View original record | R.R. 493a (20H) (D.A. 652 20-2-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/R m/LG11.6.24. FURTHER TESTS WITH TORQUE CONTROL. To determine the torsional movement of the axle when jaggering in… | ||
| Scan15 | Diagram showing the position of the centre of twist of a front spring when under braking torque. | ||
| View original record | ROLLS ROYCE, LIMITED PRINT ROOM 11 JUN. 1924 DERBY DIAGM. SHOWING POSITION OF CENTRE OF TWIST OF FRONT SPRING WHEN UNDER BRAKING TORQUE. C OF AXLE O.S. CENTRE OF TWIST N.S. CENTRE OF TWIST O.S CR. OF… | ||
| Scan16 | Recommendation to examine a Mercedes car before purchase for instructional purposes. | ||
| View original record | To C.J. and R from Hs. c. to [REDACTED]. RG. PN. ORIGINAL Hs2/LG6. 6.24. RE: MERCEDES CAR. +.407 We recommend, before we purchase this car, it would be a good thing for someone to examine and try it.… | ||
| Scan17 | Potential purchase of a Mercedes car with a gear-driven supercharger for instructional purposes. | ||
| View original record | ORIGINAL TO CJ. FROM R. Copy to - RG. HS. PN. re. MERCEDES CAR. +407 I think this car should be extremely instructive both for car and aero engine work, assuming it is like the car they had in the… | ||
| Scan18 | Comparing the performance of a 20 HP Sunbeam car against a 20 HP model. | ||
| View original record | R.E. 493A (20H) (D.A. 652 20-5-24) J.H.D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 446 REF: Hs3/LG12.6.24. To R. from Hs. c. to CJ. BJ. PN. WOR. 20 HP. SUNBEAM CAR. I had an opportunity of testing a… | ||
| Scan20 | The failure of the 40/50 HP spare wheel carrier, with a proposal for a more secure three-point mounting. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-3-24) J.H.D. ORIGINAL Expl. No. 9941 9600 REF: Hs6/L018.6.24. EXPERIMENTAL REPORT. SECRET. To R. from Hs. c. to CJ. RG. c. to DA. R. c. to EY. WOR. 40/50 HP. SPARE WHEEL… | ||
| Scan21 | The condition of a Hispano Car pivot and instructions for its disassembly. | ||
| View original record | To DA. from Hs. ORIGINAL Hsl/LG28.6.24. HISPANO CAR. f/4214 We are sending to you one of the Hispano Pivots so that you can see the condition. Whilst the car has been in our hands we have had no… | ||
| Scan22 | Dispatch of an ignition coil in a moulded redmanol case for comparative testing. | ||
| View original record | To R. from EFC. EFC1/T18.6.24. X.4079 - IGNITION COILS. Reference your Rl/M29.5.24, addressed to Hs., and R2/M29.5.24, addressed to myself, we are now, as previously suggested, sending you one of the… | ||
| Scan23 | Fitment and evaluation of a shorter change speed lever for a 40/50 HP model. | ||
| View original record | ORIGINAL To DA. from Hs. Hs9/LG25.6.24. RE. 40/50 HP. SHORTER CHANGE SPEED LEVER. Y3392 We have fitted the short change speed lever to a 'D' steering car which is fitted with a Hooper open touring… | ||
| Scan24 | Secret memo regarding an overlooked oil catcher scheme for front hubs on four-wheel brakes. | ||
| View original record | ORIGINAL To DA. from Hs. c. to GJ. c. to BY. c. to Wor. S E C R E T. FOUR WHEEL BRAKES. Hs7/LG25.6.24. X9940 9190 Referring to DAB/M21.6.24. The oil catcher scheme from the front hubs shewn on… | ||
| Scan25 | Engine throttle movement and its effect on horsepower. | ||
| View original record | R.R. 493a (20H) (D.A. 652 20-5-24) J.B.D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 9140 REF. Hs1/LG26.6.24. To E. from Hs. SECRET. EAC. THROTTLE MOVEMENT. X9140 We have carried out a test with 1/5th.… | ||
| Scan26 | Improving the Bijur starter pinion, detailing tests and failures of the cork clutch material. | ||
| View original record | R.R. 496a (ROH) (D.A. 652 20-8-24) j.n.d. EXPERIMENTAL REPORT. Expl. No. V3587 REF. Hs7/LG27.6.24. To- Mr Frowde Cc-to. Mr. Harvey Cc-to Mr. H.R. Cc-to Mr. Wontley IMPROVED RR. BIJUR STARTER PINION.… | ||
| Scan27 | Modified starter drive, addressing a fault and outlining its advantages over the current design. | ||
| View original record | B.R. 493A (20H) (D.A. 652 20-3-24) J.B.D. -2- EXPERIMENTAL REPORT. Expl. No. REF: Hs7/L.C27.6.24. The only other fault we have had with this drive was caused by the shoulder driving sleeve (D.51131)… | ||
| Scan28 | Test report on an Eagle XV engine with 2-speed gear, noting sluggish gear changes with Shell Super Light Oil. | ||
| View original record | To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. ORIGINAL Hs3/LG30.6.24. SHELL SUPER LIGHT OIL. EAGLE XV. X4627 We attach a report of test taken on Eagle XV. engine with 2-speed gear. It was… | ||
| Scan29 | Report comparing Shell Super Light Oil and Castrol for use in Eagle XV engines, including a lab report on viscosities and flash points. | ||
| View original record | Hs/TMW/LG13.6.24. SHELL SUPER LIGHT OIL. The two Eagle XV's were originally run on the above oil, but owing to the laggard manner in which the change speed mechanism was operated at high temperatures,… | ||
| Scan30 | Performance of car 6.EX after a test drive and outlining necessary modifications. | ||
| View original record | TO HS. from R. 6 EX ORIGINAL R10/M25.6.24. 6. EX. --- X3923 Regarding the above, I asked PN. to drive it, as I thought it was very excellent for power and vigorous pick up. He thought the engine harsh… | ||
| Scan31 | Comparison of engine cooling performance between a three-bladed fan and a standard fan on vehicle 98-NK. | ||
| View original record | COPY. Chateauroux. June 29th,1924. FAN TESTS ON 98-NK. Condition of tests. Full throttle, braking down to required speed. All tests taken under exactly similar conditions as regards roads and… | ||
| Scan32 | Test report comparing the efficiency of a three-bladed fan versus a standard fan on a 35-PK model. | ||
| View original record | COPY. Chateauroux, June 29th. 1924. FAN TESTS ON 35-PK. Conditions of tests. Full throttle, braking down to required speed. All tests taken under exactly similar conditions as regards roads and… | ||
| Scan33 | From R. to HS. discussing the ideal braking force distribution for 4 wheel brakes. | ||
| View original record | TO HS. FROM R. ORIGINAL Hs GETTING A ROCKET R3/M30.6.24. 4 WHEEL BRAKES. +9940 I notice that you still have approximately 6 times the braking of the present standard 2 wheel brakes. I would like to… | ||
| Scan34 | Brake jaggers, detailing tests on Hispano, Isotta, and Delage cars. | ||
| View original record | B.R. 493A (20H) (D.A. 652 20-2-24) J.H.D. EXPERIMENTAL REPORT. [REDACTED To/From/Cc/Bc block] ORIGINAL Expl. No. Hs 4214 REF: HsL/1/M 5.24 1559 9940 S E C R E T. BRAKE JAGGERS. HISPANO CAR. We have… | ||
| Scan35 | Brake tests investigating 'brake jaggers' by modifying Ferodo linings on brake shoes. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. "-2-" Expl. No. 4214 1559 REF: Hal/C/G.5.25. With direct pressure on the front brakes we carried out a test on the Hispano to find which… | ||
| Scan36 | Brake shoe testing to prevent 'jaggers' by modifying the Ferodo lining. | ||
| View original record | R.R. 493A (20M) (D.A. 652 20-3-24) J.H.D. -3- Expl. No. 4214 1559 REF: Hsl/LGB/5.8.24. EXPERIMENTAL REPORT. We had anticipated from the theories put forward for jaggers that with only 4" on the front… | ||
| Scan37 | List of unsuccessful experiments conducted to eliminate front wheel brake jagger on model L.W.111. | ||
| View original record | DETAILS OF TESTS CARRIED OUT TO DATE ON FRONT WHEEL BRAKE JAGGER ON L.W.111. The following experiments have proved unsuccessful in eliminating or in any way altering the jaggers :- 'A' - EXPERIMENTS… | ||
| Scan38 | List of experiments on brakes and brake carriers, along with different methods of brake operation. | ||
| View original record | 'B' - EXPERIMENTS ON BRAKES AND BRAKE CARRIER. (15) Varying amount of slack in shoe anchorage. (16) Flexible brake shoes fitted (bronze). (17) Floating fulcrum brakes fitted. (18) All types of split… | ||
| Scan39 | Comparison note on two different front wheel brake schemes, the 'Hispano' and the 'Agreed' scheme. | ||
| View original record | FRONT WHEEL BRAKE SCHEMES COMPARED. NOTE: Comparing Hispano with the 'Agreed' Scheme it is seen that the direct brake press. is approx. half that of the 'Agreed' scheme. By making the Hispano… | ||
| Scan40 | The testing of Scintilla Magneto types AC-6-A and AG-6-A, focusing on their automatic advance feature. | ||
| View original record | To R. from EFC. c. C.J. & FN. c. EY. EP. DA. c. E. ORIGINAL COPY. EPC1/T9.5.24. X.4187 - SCINTILLA MAGNETOS TYPES AC-6-A AND AG-6-A (BOTH TYPES INCORPORATING AUTOMATIC ADVANCE). In all, three machines… | ||
| Scan41 | The testing and comparison of different Scintilla magneto models for the 20 HP chassis. | ||
| View original record | Contd. -2- EFCL/19.5.24. requirements - as follows :- "When we were discussing the magneto with Mr. Royce "I had at W.W. a 20 H.P. car fitted with a Scintilla "magneto which had an automatic advance.… | ||
| Scan42 | Testing a magneto with automatic advance, including details on rotation, RPM ranges, and advance curves compared to a 20 HP chassis. | ||
| View original record | Contd. -3- EPCR/TS.D.24. The idea of testing this machine was the possibility of its application to the E.A.C., but for this purpose a magneto of negative or anti-clockwise rotation was required, and… | ||
| Scan43 | Experimental routine test results comparing Scintilla AM-6-A and Watford E.O.6 magnetos. | ||
| View original record | Contd. This magneto was also put through our experimental routine tests, with results recorded below, after which it has been fitted to EAC.III, chassis 93-NK and has done 453 miles to date. It will… | ||
| Scan44 | Comparison of dimensions for Scintilla and Watford magnetos with a supporting sketch and table of data. | ||
| View original record | Contd. -o- EFCL/T9.5.34. For other features of the design, see report FB.95. (3) The magnetic air gaps are unobtainable. (4) The length of H.T. safety gaps:- AMS-A. 26485. 11.5 mm. " 34937. 11.5 mm.… | ||
| Scan45 | Magneto platinum point gaps and contact breaker timing specifications. | ||
| View original record | Contd. -6- EFCL/T9.5.24. (6) The platinum point gaps on magnetos as received were :- Scintilla No.26485 .012" No.34937. .013" Watford E06. .012" Contact Breaker Timing. Referring to the position when… | ||
| Scan46 | Magneto endurance and performance tests, including open and short circuit curves. | ||
| View original record | Contd. -7- EFC1/T9.5.24. We found the above gaps and timing auxx to be very little altered after our tests, and also very little effected by varying the platinum gap ± .004". An endurance test,… | ||
| Scan47 | Safety gap, short duration, and utility leakage tests on various magnetos. | ||
| View original record | Contd. -8- EFCL/19.5.24. safety gaps of the magnetos, also went through successfully on all these machines, except that on the second Scintilla (with larger armature capacity) sparks were observed… | ||
| Scan48 | High and low speed sparking characteristics for various magnetos. | ||
| View original record | Contd. -9- EFC1/T9.5.24. (a) (b) (c) (d) Safety gap. Scintilla No.26485. 6.25 2.7 1.0 .7 11.5 mm. Scintilla No.34937. 10.95 6.75 2.4 1.15 11.8 Watford EO6. 6.5 5.3 3.8 2.4 8.5 (N.B. The figures for… | ||
| Scan49 | Page detailing primary and secondary resistance and current measurements for various magnetos. | ||
| View original record | Contd. -10- EPCL/T9.5.24. (18) & (19) Primary and secondary resistances. 1st. Scintilla. .31 ohm at 18.5°C and 11940 ohms at 20.5°C 2nd. " .32 ohm and 12000 ohms at 16.5°C. EO6 Watford .53 ohm and… | ||
| Scan50 | Performance data for three different Scintilla AG-6-A magnetos with automatic advance. | ||
| View original record | SCINTILLA MAGNETO AG-6-A. (AUTOMATIC ADVANCE) 19.1.23. We find this magneto to Commence its automatic advance at 500 r.p.m. (Magneto speeds and advances throughout). Attain an advance of 6° at 1150… | ||
| Scan51 | Secret memo regarding a 1000-mile test car, focusing on body construction weaknesses and a proposed solution for wing trouble. | ||
| View original record | R.R. 235a (100 T) (S.H. 159 11-8-20) G. 2800 ORIGINAL TO HS. FROM DA/EV. SECRET. DA/EV1/M24.5.24. Copy to R. H. E. A. C. re. 1000 MILE TEST CARS. X98240 Referring to your HS1/LG22524., re the body on… | ||
| Scan52 | Preliminary report on the Scintilla Magneto Type AM6-A. | ||
| View original record | To EPC. PB.95. PRELIMINARY REPORT ON SCINTILLA MAGNETO TYPE AM6-A. Although very different in design, the principles (apart from the automatic advance fitted) involved in this magneto, which is of the… | ||
| Scan53 | Investigation into the sources of noise on a Scintilla AM-8-A magneto at various speeds. | ||
| View original record | EFC. COPY. 6.3.34. WA.11. X.4183 - INVESTIGATION OF NOISE ON SCINTILLA AM-8-A MAGNETO To facilitate the analysis of the noise emanating from this magneto, the distributor and contact breaker was… | ||
| Scan54 | Graph detailing the automatic advance cam performance with speed for Scintilla Magnetos types AG6A and AM6A. | ||
| View original record | AUTOMATIC ADVANCE CAM WITH SPEED ON SCINTILLA MAGNETOS TYPE'S AG6A AND AM6A. AUTOMATIC RANGE = 32.5° 22° ON ENGINE HAND RANGE = 17.5° 11.5° " " TOTAL = 50° 33.5° " " AG6-A No 21525 AUTOMATIC RANGE =… | ||
| Scan55 | Graph of open-circuit volt-speed and short-circuit ampere-speed curves for the primary windings of Scintilla and Watford magnetos. | ||
| View original record | K. O.C. VOLTS. S.C. AMPERES. SPEED. R.P.M. AMPERES. VOLTS. WATFORD E06 No 30410. SCINTILLA AM6A No 34937. SCINTILLA AM6A No 26485. OPEN CIRCUIT VOLT-SPEED AND SHORT CIRCUIT AMPERE-SPEED CURVES OF… | ||
| Scan56 | The advantages and disadvantages of water-heated versus exhaust-heated carburetter systems. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs2/LG1.5.25. To R. from Hs. c. to CJ. BJ. c. to E. RG. c. to DA. BY. c. to Wor. RE: CARBURRETTER HEATING. X766 X.8030… | ||
| Scan57 | Facts about exhaust heated throttles, choke valves, and power reduction. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs2/LCL.5.25. In order to assist you in your decisions, we should like to put forward the following facts :- (a) The… | ||
| Scan59 | Potential solutions to engine overheating, including thermostat removal and radiator design changes. | ||
| View original record | TO HS. FROM R. c.c. to CJ. DS. HY. TM. RM. RP COOLING Slight ORIGINAL 'R' CLASSIC OVERHEATING. Y766 X8250 With reference to the Springfield use of copper tubes instead of our brass ones, this should… | ||
| Scan62 | The causes and factors contributing to engine overheating, with reference to the 40/50 'Silver Ghost' model. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/Rm/LMD 4.5.25. Handwritten: Hs CLASSIC OVERHEATING. During the past eighteen months the Expl: Dept: have done a large… | ||
| Scan63 | Comparing engine overheating and cooling efficiency with a Hispano Suiza engine. | ||
| View original record | R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs/Ra/LG14.5.25. associated with R.R. cars, is low compression. The Hispano Suiza, on the other hand, is smaller, has… | ||
| Scan64 | Comparing the radiator and fan cooling systems of the Silver Ghost and Hispano models. | ||
| View original record | R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hs/Bm/1/L.14.5.25. to be in existence at the moment. We are therefore forced to use the same devices for dissipating… | ||
| Scan65 | Comparing overheating issues and cooling system performance between the 'Silver Ghost' and the 'Hispano Suiza'. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF: Hs/Rm/LGL4.5.25. large part in the cooling system. On the 'Silver Ghost' if the fan belt stretches and is not… | ||
| Scan66 | The cooling system limitations and overheating issues of the Silver Ghost model. | ||
| View original record | R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF Hs/Rm/LRL.5.25. the air temperature at which it will boil is reduced to 28.5°C. If the fan on the Silver Ghost is… | ||
| Scan69 | Comparing the turning circles of the EAC.111 axle against the standard long chassis. | ||
| View original record | R.R. 402A (20H) (D.A. 658 20-3-24) J.H.D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. X.980 REF: Hs12/1/M2.5.34 49420 To R. from Hs. c. to CU. RG. c. to DA. E. c. to EY. WOR. S E C R E T. E.A.C.111. On… | ||
| Scan70 | Routine test results for two Watford R.O.1 magnetos which passed production testing. | ||
| View original record | To R. & E. from EFC. C. CJ. & FN. By ~~RM~~. ~~HR~~. DA. ORIGINAL X.3551- R.O.1. WATFORD MAGNETOS. _________________________________ It is thought desirable to state for purposes of record some… | ||
| Scan71 | Comparison of performance results for Watford HC6 and Scintilla magnetos, including spark gaps, speeds, and resistances. | ||
| View original record | Contd. -2- EPC6/T15.5.24. (a) (b) (c) (d) 1st. machine. 6.7 6.15 4.80 2.65 2nd. " 6.2 5.1 4.2 2.4 -------------------------------- A comparison of these results with those recently issued in our… | ||
| Scan72 | Comparison of maximum and minimum magneto readings for two machines at 108 volts A.C. | ||
| View original record | Contd. -3- EFC8/T15.5.24. winding at 108 volts A.C. 50~ were as follows :- Magneto. Maximum. Minimum. 1st. machine. 16.6 10.9 2nd. " 18.3 9.9 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ the second… | ||
| Scan73 | The testing and performance of a Nickel-Iron (Ni-Fe) battery. | ||
| View original record | Contd. -2- EFCL/T15.5.24. The first and second of these batteries are in size and shape unsuitable for the chassis, but could be carried on the footboard. The third has been made up to our standard… | ||
| Scan74 | Performance comparisons and specifications of various automotive batteries, including Ni-Fe and Alklum types. | ||
| View original record | Contd. -3- EFC1/T15.5.24. On the second high rate discharge through #.100 ohms the result was practically identical with the first, and on the accompanying photostat of high rate discharge curves will… | ||
| Scan75 | High and low rate discharge tests performed on an Alklum 50 ampere-hour battery. | ||
| View original record | Contd. -4- EFC1/T15.5.24. On the first high rate discharge through an invariable external resistance of .100 ohm, the initial amperes were 92 only. On the second low rate discharge through a… | ||
| Scan76 | Comparison of test results for NI-FE and ALKLUM alkaline batteries. | ||
| View original record | -95- EFC1/T15.5.24. NI-FE. ALKLUM. 60 a.h. 60 a.h. 50 a.h. (122 lbs.) (93½ lbs.) (80½ lbs) Initial amperes on high rate dis- } 1st. 107 92 95 charge through an invariable external } 2nd. 108 95 98… | ||
| Scan77 | Comparison of various batteries, analyzing their performance characteristics and discharge curves. | ||
| View original record | Contd. -6- EFCl/T15.5.24. Battery. Weight (lbs) Motor amperes. Battery terminal volts. Speed observed on battery ignition distributor rotor. (R.P.M.) Fuller Sparta. 103.5 98.0 10.75 34.5 Lithanode. 92… | ||
| Scan78 | Issues with battery/cell evaporation, venting, and external corrosion. | ||
| View original record | Contd. -7- EFC1/T15.5.24. (1) Rapid evaporation of solution, resulting in the necessity for frequent topping up. (2) The problem of providing a satisfactory vent, because it is necessary that this be… | ||
| Scan79 | Test results on three separate chart recordings. | ||
| View original record | Section 1: Nu-Felo (118) 122lbs 60 a.h. 31-1-24 9.5 hours Average amperes = 6.71 Ampere hours = 63.7 .52 a.h per lb. 1.80w esternal Section 2: 29 16-4-24 114 Alklum 60 93.5 lbs 60 a.h. Average amperes… | ||
| Scan80 | Graph showing continuous high-rate discharge curves for various 40-50HP chassis batteries. | ||
| View original record | 40-50HP SIZE CHASSIS BATTERIES CONTINUOUS HIGH RATE DISCHARGE CURVES THROUGH AN INVARIABLE EXTERNAL RESISTANCE OF .100 OHM BATTERIES 62, 105, 114, 116, 118, 120, 135 Y-AXIS: AMPERES OR TEN TIMES… | ||
| Scan81 | Steering affects caused by the torsional movement of the axle under uneven four-wheel braking. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. -1- Expl. No. REF: Hx/Bx/1/G15. 5. 24. STEERING AFFECTS WITH FOUR-WHEEL BRAKES. We have been investigating the way in which the axle… | ||
| Scan82 | The effects of braking on the vehicle's pivot lean and steering stability. | ||
| View original record | B.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. -2- Expl. No. 9940 REF:Us/R m/1015. b. 24. With one brake only in action, the pivot on the side where the braking is taking place,… | ||
| Scan83 | Steering issues caused by braking and the effect of a torque arm. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Expl. No. REF: Hs/Rm/L/1015.5.24. the reverse, castoring action will, of course, aggravate the trouble. We have investigated the… | ||
| Scan84 | Secret memo discussing design considerations for four-wheel brake systems. | ||
| View original record | R.R. 235A (100 T) (S.H 159 11-8-20) G. 2800 ORIGINAL TO HS. E. FROM R. S E C R E T. R1/M16.4.24. (RG. BA.) E. A. C. Copy to - CJ. BY. WOR. FOUR WHEEL BRAKES. (9940) It seems that if we are not too… | ||
| Scan85 | Testing an E.A.C. gravity clutch plate and a proposed modification. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 49301 REF: HsS/LG20.5.24. To R. from Hs. C. to CJ. RG. C. to DA. E. C. to BY. WByr S E C R E T. E.A.C. CLUTCH. 49301… | ||
| Scan86 | Performance report on experimental E.A.C. dynamo outputs, designated /03, 05, and 07. | ||
| View original record | [Stamp: ORIGINAL S SHEET E.A.C. SIGNAL] To R & E. from EFC. c. CJ. & FN. c. EY. EP. DA. EFC1/T21.5.24. X.9660 - E.A.C. DYNAMO OUTPUT PERFORMANCE. Further to our EFC1/T13.3.24, four experimental EAC.… | ||
| Scan87 | Performance test results for a controlled machine under various temperature conditions, including chassis speed equivalents. | ||
| View original record | Contd. -2- EFC/T21.5.24. CONTROLLED Arranged ordinarily as a controlled machine:- (a) In the cold condition a balancing terminal P.D. of 12.4 volts is put up at 423 r.p.m. (Average of two machines).+… | ||
| Scan88 | Graph of ampere output curves for an EAC dynamo under various conditions. | ||
| View original record | AMPERE OUTPUT CURVES OF R.R. EAC DYNAMO UNDER VARIOUS CONDITIONS OPERATING VOLTAGES 15.35 15.10 14.85 14.60 14.35 14.10 13.85 13.60 AMPERE OUTPUT 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 FIELD AMPERES… | ||
| Scan89 | The performance of a Scintilla magneto for the E.A.C.2 engine. | ||
| View original record | To R. from EFC. C. CJ. TY. HS. ORIGINAL MARE T. EFCR/T26.5.24. X.9790 - MAGNETO FOR E.A.C.2. --------------------------- With reference to El/M24.5.24, the AM-6-A Scintilla magneto, exemplified by… | ||
| Scan90 | Comparison of magneto performance, focusing on Scintilla and Watford models for 40/50 cars. | ||
| View original record | Contd. -2- EFC2/T26.5.24. In one respect the Scintilla magneto is short of an important feature which is possessed by the Watford E.O.6. We refer to the fact that owing to the use of the movable… | ||
| Scan91 | Methodology and results of chassis frame deflection tests. | ||
| View original record | To DA. from Hs. ORIGINAL Hs11/LG27.5.24. CHASSIS FRAME DEFLECTION. 44260 5,200 was the total load put on to the Frame so that there was half this on each side member. This load was arrived at by… | ||
| Scan92 | Testing sunwheel bush clearance and the effects of different oils. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (R.C.J.) B.J. WOR. By E. Da. EP. PN. OY. (RG) Expl. No. 4627. REF. Hs2/LG29.5.24. OBJECT OF TEST. To prove whether… | ||
| Scan93 | Testing a fixed choke type carburetter with a vaporiser. | ||
| 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. BN. OY. FS Expl. No. 9080 REF. HsS/LG29.5.24. OBJECT OF TEST. To test fixed choke type… | ||
| Scan94 | Vibrations, noise and wear in the adopted servo brake gears. | ||
| View original record | R.R. 403A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 9940 REF: Hsd/LCSO.5.24. To R. from Hs. c. to CJ. RG. c. to DA. HJ c. to HY. Wor. S E C R E T. ADOPTED SCHEME OF… | ||
| Scan95 | Horsepower figures from tests on a 40/50 HP engine with different exhaust pipe schemes. | ||
| View original record | To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. Wor. ORIGINAL 40/50 H.P. X3056 X3236 Hs5/LGL.4.24. We attach sheet giving H.P. & figures taken on a 40/50 HP. engine with the present standard… | ||
| Scan96 | Comparison of power losses for two exhaust system schemes relative to the standard 40/50 HP system. | ||
| View original record | POWER LOSSES TO EXHAUST SYSTEMS WITH THE W.W. AND DERBY SCHEMES ON THE STANDARD 40/50 H.P. The following figures give the loss in H.P. of the two schemes relative to the standard 40/50 H.P. system.… | ||
| Scan97 | Bump test report on a new scheme for front springs and rear anchorage, detailing breakages over time. | ||
| View original record | BUMP TEST OF NEW SCHEME OF FRONT SPRINGS REAR ANCHORAGE (N.REF. 1706). Conditions of test :- Drum = 105 r.p.m. Cams. = 2" lift. Tyres = 65 lbs./sq.in. Load = 600 lbs. + top half crankcase and full… | ||
| Scan98 | Tabulated log detailing component breakages and remarks against running time and piece number. | ||
| View original record | BREAKAGES. Total running time hrs. mins. | Piece No. | Running time. hrs. mins. | Description and remarks. 37 43 | K.5422 | 7 45 | Front clip of rear side front spring broken. 38 43 | F.71009 | 24 43… | ||
| Scan99 | Log sheet detailing vehicle component breakages and failures with corresponding running times. | ||
| View original record | Total running time. hrs. mins. | Piece No. | Running time. hrs. mins. | BREAKAGES. Description and remarks. 67 23 | F.587 | 67 23 | Steering tube broken directly above worm. | F.6979 | 67 23 | Cross… | ||
| Scan100 | Log detailing component breakages and remarks recorded during running time tests. | ||
| View original record | Total running time. hrs. mins. | Piece No. | Running time. hrs. mins. | BREAKAGES. Description of and remarks. 96 45 | F.4614 | 9 0 | Front buffer spring broken, front joint side steering tube. |… | ||
| Scan101 | Bump test comparison report on new type Firth road springs and clips versus the standard pattern. | ||
| View original record | BUMP TEST COMPARISON. Comparison of new type Firth road springs with standard pattern. SPRING FAILURES. | SPRINGS | No. of failures. | Running time of tests. | |---|---|---|---|---| | | O.S. | N.S. |… | ||
| Scan102 | Steering tests conducted on a 40/50 car with front disc wheels and vertical pivots. | ||
| View original record | R.R. 493 A (40 H) (SL 42 12-7-23). J.H., D. CHASSIS ON CENTRE - POINT STEERING ORIGINAL EXPERIMENTAL REPORT. Expl. No. REF: Hs6/L.O1.4.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to Hy. WGR.… | ||
| Scan103 | Steering shock tests when driving over various obstacles. | ||
| View original record | R.R. 403A (48 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: HS6/LGL.4.24. We have carried out tests on a smooth flat piece of road by running the car over obstacles. We used some… | ||
| Scan104 | Steering performance and low-speed wobbles on a simulated bad road. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -3- Expl. No. REF: H26/LGL.4.24. EXPERIMENTAL REPORT. We have found a piece of road near Derby which approximates closely to a bad French road - we feel… | ||
| Scan105 | Tests on an agreed type servo using 35, 45, and 55 degree angle threads. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL Expl. No. X9910 X1559 REF:Hs/1/L4 M. 24. EXPERIMENTAL REPORT. S E C R E T. WW. AGREED TYPE SERVO. ------------------------ To R from Hs. c. to CJ.… | ||
| Scan106 | W.W. slow speed servo motor with 550 thread, detailing torque ratios and bearing loads. | ||
| View original record | R.R. 402A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL/LGS.4.24. W.W. SLOW SPEED SERVO MOTOR WITH 550 THREAD. The mechanical advantage of the servo was determined and… | ||
| Scan107 | Graph showing the friction effect in a W.W. slow speed servo, plotting torque output against torque input. | ||
| View original record | CURVES SHOWING FRICTION EFFECT IN W.W. SLOW SPEED SERVO. TORQUE OUTPUT. lbs.INS. 2500. 2000 1500 1000 500 0 TORQUE INPUT. lbs INS. 200 400 600 800 DECREASING LOAD INCREASING LOAD TOTAL TORQUE OUTPUT.… | ||
| Scan108 | Make ratio-speed curves for a 20 HP ignition contact breaker. | ||
| View original record | ORIGINAL To R. from SFC. c. E. DA. c. GJ. & FW. c. EY. EP. EPCL/T5.4.34. X.4357. UP-TO-DATE R.R. 20 HP. IGNITION CONTACT BREAKER. Attached please find copy of make ratio-speed curves for three… | ||
| Scan109 | Graph of make ratio versus distributor speed for a standard distributor at various primary gap settings. | ||
| View original record | MAKE RATIO-SPEED CURVES. OF R.R. STANDARD DISTRIBUTOR. MAKE RATIO. DISTRIBUTOR SPEED R.P.M. NORMAL SPEED 720 R.P.M PRIMARY GAPS. a. .010" b. .018" c. .026" a .65 b .55 c .45 H.E.W 4-4-24 E.F.C 4/4/24 | ||
| Scan110 | Comparing three exhaust systems on a standard 40/50 HP engine. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. (1) Expl. No. REF: Hs/ACL/5.4.24. EXPERIMENTAL REPORT. COMPARISON OF EXHAUST SYSTEMS ON STANDARD 40/50 HP. ENGINE. Tests were made to compare the following… | ||
| Scan111 | Table comparing power output and loss in B.HP for various exhaust systems at different engine speeds. | ||
| View original record | EXHAUST SYSTEM TESTS - (2) POWER OUTPUT OF STD. SYSTEM AND LOSS IN B.H.P. OF THE OTHER SYSTEMS RELATIVE TO STANDARD SYSTEM. | | B.H.P. with std. exh: system. | LOSS IN B.H.P. RELATIVE TO STD. SYSTEM |… | ||
| Scan112 | Indicator work performed on different engine exhaust systems. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-28). J.H., D. (3) Expl. No. REF: Hs/ACL/S.4.24. EXPERIMENTAL REPORT. INDICATOR WORK ON EACH SYSTEM. Light spring diagrams were taken of the exhaust and suction strokes at… | ||
| Scan113 | Graph of piston displacement for crank angle showing indicated volumetric efficiency for a 40/50 engine. | ||
| View original record | 40-50 ENGINE. STANDARD EXH SYSTEM. CUT OUT CLOSED. PRESS. SCALE 1" = 6.2 lbs/□" CYL. NO. 6. R.P.M. 2000. MAX PRESS. AT END OF EXH STROKE = 7.13 lbs/□" INDICATED VOL. EFFCY = 88% Indicated Vol.… | ||
| Scan114 | Graph of exhaust system pressure against crank angle for a 40-50 engine at 2000 RPM. | ||
| View original record | 40-50 ENGINE. STANDARD EXHAUST SYSTEM. PRESSURE SCALE 1" = 6.2 lbs/□" CYL NO 6. R.P.M. 2000. CUT OUT OPEN. MAX PRESS ON NEAR END OF EXH STROKE = 2.79 lbs/□" INDICATED VOL. EFFICIENCY = 88% EXH. SYSTEM… | ||
| Scan115 | Graph showing pressure curves and piston displacement against crank angle for a 40-50 engine. | ||
| View original record | 40-50 ENGINE. W.W. EXH. SCHEME PRESS. SCALE 1" = 6.2 lbs/□" CYL NO 6. R.P.M. 2000. CUT OUT CLOSED. MAX PRESS. NEAR END OF EXH STR 10.85 lbs/□" INDICATED VOL EFFCY = 91% ATMOS LINE PISTON DISPLACEMENT… | ||
| Scan116 | Graph showing piston displacement for crank angles related to a 40-50 engine exhaust scheme. | ||
| View original record | 40-50 ENGINE. W.W. EXHAUST SCHEME. PRESS SCALE 1" = 6.2 lbs/□" CYL NO 6. R.P.M. 2000. CUT-OUT OPEN. MAX PRESS NEAR END OF EXH STROKE = 7.6 lbs/□" INDICATED VOL. EFFCY. = 88% ATMOS LINE PISTON… | ||
| Scan117 | Graph plotting piston displacement and pressure against crank angles for a 40/50 engine's exhaust stroke. | ||
| View original record | 40/50 ENGINE. DERBY EXHAUST SETTING. PRESS. SCALE 1" = 6.2 lbs/sq in CYL. NO. 6. R.P.M. 2000. CUT-OUT CLOSED MAX. PRESS. NEAR END OF EXHAUST STROKE = 9 lbs/sq in INDICATED VOL. EFFCY = 88% ATMOS LINE… | ||
| Scan118 | Graph plotting piston displacement against crank angle for a 40/50 HP engine's Derby exhaust scheme. | ||
| View original record | 40/50 ENGINE. DERBY EXH. SCHEME. PRES. SCALE 1" = 6.2 LBS/[]" PULL NO. 6. R.P.M. 3000 CUT OUT CLOSED & OPEN. MAX. PRESS NEAR END OF EXH. STROKE = 5.3 lbs/[]" INDICATED VOL. EFFC'Y = 88% ATMOS LINE… | ||
| Scan119 | List of weights for various units on a Hispano-Suiza engine. | ||
| View original record | To R. from Hs. c. to CJ. RU. c. to E. DA. c. to BY. WGR.✓ ORIGINAL. Hel/LCS.4.24. HISPANO.SUIZA WEIGHTS. X.4214 We give below list of weights of various units on Hispano engine. SECTION. DETAIL… | ||
| Scan120 | Detailed weight breakdown of various engine components, continued from a previous page. | ||
| View original record | contd:- -2- SECTION. DETAIL WEIGHTS. lbs. ozs. WATER PUMP. Water pump complete 3 0 PISTONS. 6 Pistons complete with rings, gudgeon pins and lock plates. 11 4 6 gudgeon pins. 2 10 Total weight - 13 14… | ||
| Scan121 | Comparing leverages and pressure on different servo schemes. | ||
| View original record | DA. from HS. ORIGINAL HS5/LG9.4.24. X9910 With reference to servo leverages. We have compared the leverages on the WW. agreed scheme servo with the original slow speed servo instructed by Rg. which… | ||
| Scan122 | The necessity to design new parts to apply front wheel brakes to the short type chassis. | ||
| View original record | To DA. from Hs. c. to BY. RG. c. to WOR. ORIGINAL SECRET. E.A.C. 111. Hs7/LG11.4.24. X9770 (X9940 - struck through) So far, all the schemes got out for EAC.111 chassis only apply to the long type… | ||
| Scan123 | Friction and other losses in the Mk. Hall-Scott servo. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-28). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9910 REF: Hs/ACL/LG14.4.24 FRICTION AND OTHER LOSSES IN MK. HALL-SCOTT SERVO. The tests were divided into three main sections… | ||
| Scan124 | Technical note on torque loss and plate pressure in different servo designs. | ||
| View original record | contd:- -2- The difference between this and the actual torque obtained from two plates represents the torque lost to the dog friction resisting any increase in plate pressure. From this we can obtain… | ||
| Scan125 | Test results for friction losses on a F.W. slow speed servo motor, with tables for torque and coefficient of friction. | ||
| View original record | TESTS ON F.W. SLOW SPEED SERVO MOTOR FRICTION LOSSES Torque is expressed in lbs. ins. TABLE 1 | Equt. pedal press: lbs. | Torque input. | One plate (no dogs) Servo torque. | Mech: efficy. (over all) |… | ||
| Scan126 | Test results and diagrams comparing the performance of standard and improved slow speed servo types. | ||
| View original record | TESTS ON W SLOW SPEED SERVO - STANDARD OR IMPROVED TYPE. First Table: | Eqvt. pedal pressure. | Torque put in to servo. | Torque output due to servo | | Total torque output (servo T + T put in) | | |… | ||
| Scan127 | The performance test results for a Hispano servo motor after restoration. | ||
| View original record | R.B. 465a (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT Expl. No. 1559 4214 REF: HISPANO SERVO MOTOR. It was found after previous tests on this servo that the braking on the car was not up to… | ||
| Scan128 | Overheating issues in 40/50 HP cars fitted with four-wheel brakes. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 40/50 o GSN/L ORIGINAL OVERHEATING REF 86/L.G.27.4.25. To R. from Hs. c. to CJ. BJ. c. to E. RG. c. to DA. BY. c. to Wor.… | ||
| Scan130 | Overheating on the 40/50s model, weighing the pros and cons of exhaust versus water-heated throttles. | ||
| View original record | THROTTLE HEATING - EXHAUST OR WATER. R CLASSIC PROS & CONS QQ-CL. FROM R. Copy to - HS. " " - EAC re. OVERHEATING OF 40/50s. CJI/E27.4.25. I have just heard of the Australian trouble. My impression is… | ||
| Scan132 | Overheating issues in 40/50 cars, focusing on exhaust systems and 4-wheel brakes. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. REF: Hs5/LG28.4.25. To R. from Hs. To CJ. " " To BJ. " " To WOR. " " RE. OVERHEATING ON 40/50 CARS. Handwritten: Hs… | ||
| Scan133 | Page discussing vehicle overheating issues, particularly in Australia, and comparing braking systems. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: HS5/LG28.4.25. corners will be taken at the same speed, on a car with rear brakes only, the power will be shut off at… | ||
| Scan135 | Over-heating investigations related to the choke valve in the exhaust. | ||
| 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. 766. REF. Hs3/LGL. 5. 25. OBJECT OF TEST. TESTER. OVER-HEATING… | ||
| Scan136 | Tests on the heat flow to the cooling water with varying exhaust back pressure on an 'EAC' engine. | ||
| View original record | R.R. 493a (50n) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. Hs/ACL/LG29.4.25. TESTS ON HEAT FLOW TO THE COOLING WATER WITH EXHAUST BACK PRESSURE TAKEN ON 'EAC' ENGINE. The following… | ||
| Scan137 | Engine performance tests related to heat flow and back pressure. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hw/ACL/1029. 4. 25. TEST (A) CURVE 2. As would be expected we get a steady fall in the heat dissipated as the power on… | ||
| Scan138 | The relationship between throttle, back pressure, power, and heat flow. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hs/ACL/L629.4.25. to open up the throttle and the heat flow increases although the power at the flywheel is the same.… | ||
| Scan139 | Tests conducted on an exhaust down-pipe baffle to determine its effect on an over-heating problem. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. Hg/Ra/LCSO.4.25 EXHAUST DOWN-PIPE BAFFLE. We have carried out a number of experiments on the car, both on the dynamometer… | ||
| Scan140 | Page 2, detailing tests on the effect of a restricted exhaust baffle on engine power and water temperature. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs/RM/1030.4.25. 25 m.p.h. was maintained by varying the throttle opening. It was noted that, due to the fall in power… | ||
| Scan142 | Specifications for a standard tall stabalite encased battery ignition coil. | ||
| View original record | To R. from EFC. c. E. & De. c. CJ. & FN. c. BY. EP. OY. ORIGINAL X.4596 - UP-TO-DATE STANDARD TALL RR. STABALITE ENCASED BATTERY IGNITION COIL. and X.3485 - UP-TO-DATE RR. BATTERY IGNITION GENERAL.… | ||
| Scan143 | Specifications and performance details for a contact breaker and secondary coil for a 20 HP chassis. | ||
| View original record | -2- Contd. CONTACT BREAKER: Normal speed (R.P.M.) (20 HP.chassis) 700 No. of breaks per revolution, 6 " " " " second. 70 Platinum gaps set at .022" for Test. .019 for Prod'n. Make ratio. r .50 for… | ||
| Scan144 | Analysis of electrical current consumption in an ignition system, comparing observed and calculated values. | ||
| View original record | EFC3/T29.4.24. -3- Contd. The manner in which this consumption varies at different distributor and road speeds is shown on the accompanying curves, there being a curve for the observed current and… | ||
| Scan145 | Ignition system energy consumption and performance testing of 'Eska' tungsten points. | ||
| View original record | EFC3/T29.4.24. -4- Contd. (1) The probability is that this consumption is given for relatively high engine and contact breaker speed when the consumption will be low. At the lower engine engine… | ||
| Scan146 | The performance of points, noting they are satisfactory compared to previous makes that showed burning or pitting. | ||
| View original record | EFC3/T29.4.24. -5- Contd. these points is reasonably satisfactory, all makes of points tried previously having shown unsatisfactory burning or pitting. A report on a similar set of these points tested… | ||
| Scan147 | Graph of current consumption curves for a standard tall coil at 8 and 12 volts, plotting current against distributor speed. | ||
| View original record | CURRENT CONSUMPTION CURVES FOR R.R. STANDARD TALL COIL IN STABALITE CHAC AT 8 AND 12 VOLTS RESPECTIVELY. Y-AXIS (LEFT): CURRENT AT BREAK (AMPERES) Y-AXIS (RIGHT): AVERAGE CURRENT (AMPERES) X-AXIS… | ||
| Scan148 | Graph showing the Gap-Make Ratio Curve for a standard Goshawk distributor at a constant speed of 700 R.P.M. | ||
| View original record | GAP-MAKE RATIO CURVE. OF STANDARD GOSHAWK DISTRIBUTOR. RUN AT A CONSTANT SPEED OF 700 R.P.M. MAKE RATIO. PRIMARY GAP (10^-3 INS) POINTS A AND B REPRESENT THE LIMITS GIVEN IN THE PRODUCTION… | ||