Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | Testing front wheel brakes on a chassis. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL. Expl. No. 9940 REF: HS/AG/24.11.23. c from Hs. c. to CJ. c. to Rg. c. to Da. c. to BY. FRONT WHEEL BRAKES. We have tested an… | ||
| Scan1 | Experimental work on Goshawk dynamos to reduce noise and improve commutation. | ||
| View original record | To R. & E. from EFC. c. CJ. & PN. c. EY. EP. DA. c. WOR. ORIGINAL EFC1/T1.11.23. X.4383 - GOSHAWK DYNAMOS. X.4333. We have a good deal of experimental work on Goshawk dynamos in progress, the… | ||
| Scan2 | Progress report on tests of bevelling brushes and undercutting commutators on experimental Goshawk cars and dynamos. | ||
| View original record | Contd. -2- EFCl/T1.11.23. As regards the bevelling of the brushes and the new method of undercutting the commutator, we have, as reported in our EFC6/T22.10.23, a comparison in progress of the old… | ||
| Scan3 | Tests of Lucas E.575 machines, comparing brush wear and armature modifications to reduce dynamo noise. | ||
| View original record | Contd. -3- EFC1/T1.11.23. Lucas E.575 machines, comprising in the one case over 10,000 miles, and the results were particularly satisfactory, the wear being slightly less than our present standard… | ||
| Scan4 | Dynamo noise, its relation to bearing tightness, and a potential solution using a cast iron end bracket. | ||
| View original record | Contd. -4- EFCl/T1.11.23. Incidentally this latter alteration appreciably upsets the output curve and more so than would be desirable on production. The only thing we have arrived at on the question… | ||
| Scan5 | The performance of front wheel brakes and steering. | ||
| View original record | R.R. 400A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/RM/LCS.11.23. S E C R E T. Hs. from Rm. FRONT WHEEL BRAKES. Conduit Street We have tried Mr. Royce's… | ||
| Scan6 | Testing the parallel control for the front axle on a chassis with 4-wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 9940 REF: Hs2/LGS.11.23. To R. from Hs. c. to CJ. c. to Re. c. to Da. c. to HY. SECRET. 4-WHEEL BRAKES. On the… | ||
| Scan7 | Tests conducted on an 8-cylinder Isotta car. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL. EXPERIMENTAL REPORT. COPIES TO: RCJ SJ SWON. By. E. Da. EF. Expl. No. 460# REF. Hs4/LG5.11.23. OBJECT OF TEST. Tests on 8-cyl. ISOTTA CAR. TESTER.… | ||
| Scan8 | The performance of an Isotta Fraschini car, covering HP curve, acceleration, and tractive resistance. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4609 REF: Hm4/LGS.11.23. ISOTTA FRASCHINI. Road wheel HP. curve. This is a poor curve for a car having a modern overhead valve… | ||
| Scan9 | The performance and issues with a car's four-wheel braking system. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. -2- EXPERIMENTAL REPORT. Expl. No. 4609 REF: HEQ/LDS.11.23. is of the most consequence. If it were not low, it would certainly never attain a road speed of 60… | ||
| Scan10 | Dynamometer horse power curve data, gear ratios, and ignition specifications. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4609 REF: H.4/4609.11.23. DYNAMOMETER HORSE POWER CURVE. Top gear ratio 3.77 - 1 Second " 6.55 (approx.) Bottom " 11.65 -… | ||
| Scan11 | Vehicle performance including weight, acceleration, consumption, and hill climb tests. | ||
| View original record | R.R. 402A (40 H) (SL 42 12-7-23). J.H., D. -4- EXPERIMENTAL REPORT. Expl. No. 4609 REF H24/LGB. 11.23. RUNNING CONDITION :- Tool kit, spare wheels, petrol - no passengers - TOTAL WEIGHT - 4984 lbs.… | ||
| Scan12 | Vehicle braking distances under various conditions. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -B- Expt. No. 4609 REF: He4/LGB.11.23. EXPERIMENTAL REPORT. BRAKING. BOTH BRAKES. 20 m.p.h. 35.25 ft. 30 m.p.h. 75 " 40 m.p.h. 148 " REAR BRAKING ONLY. FOOT… | ||
| Scan13 | Graph plotting Horse Power. | ||
| View original record | HORSE POWER 10 20 30 40 50 Roa Mor | ||
| Scan14 | The condition of a 20 HP chassis after a 10,000-mile test. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4594 REF: Hsl/LG7.11.23. To R. from Hs. c. to CJ. WOR. c. to RG. E. c. to DA. BY. c. to EP. (79-AO) 10,000 MILES TEST ON 20… | ||
| Scan15 | The condition of various vehicle components after a test. | ||
| View original record | R.R. 493A (40 H) (EL 12 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4594 REF: Hs1/LG7.11.23. Water Pump Drive. The fabric coupling on the water pump drive was in a very ragged condition. Oil… | ||
| Scan16 | 20 HP car (79-AO) after 10,000 miles, suggesting improvements for various parts. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4594 REF: Hs1/LC7 11.23. From examination of the 20 HP. car (79-AO) after completion of 10,000 miles - we suggest the… | ||
| Scan17 | Wear measurements for an engine's crankshaft journals, crank pins, and cylinders. | ||
| View original record | WEAR ON ENGINE. CRANKSHAFT JOURNALS - standard size 1.9995". MAIN JOURNALS. | | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |---|---|---|---|---|---|---|---| | Max. dia. | 1.9985" | 1.9985" | 1.9985" | 1.999" |… | ||
| Scan18 | The inspection and test of the Goshawk electrical system from chassis 79-AO after 10,000 miles. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. BY. EP. WOR. c. Hm. De. EFC9/T8.11.23. ORIGINAL X.4338 - GOSHAWK ELECTRICAL SYSTEM. Herewith please find copy of our report on the inspection and test of the… | ||
| Scan19 | Report of inspection and test of electrical units taken from vehicle 79-AO after a 10,000 mile test. | ||
| View original record | EFC4/T7.11.23. REPORT OF INSPECTION AND TEST OF ELECTRICAL UNITS TAKEN FROM 79-AO AFTER 10,000 MILE TEST. All the parts of the electrical system have been examined, and where necessary tested, with… | ||
| Scan20 | Inspection report detailing the condition of various electrical components, being page 2 of the document. | ||
| View original record | Contd. -2- EFC4/T7.11.23. vapour The presence of oil in the distributor probably accounts for the dirt on the rotor blade and also the easily removed deposit on the contact points. Starter Motor.… | ||
| Scan21 | Inspection report on the condition of a dynamo, commutator, armature, and battery. | ||
| View original record | Contd. -3- EFC4/T7.11.23. Dynamo. Generally speaking, the dynamo was found to be in good condition. The insulation of the machine was found to be O.K. with the exception that that of the positive… | ||
| Scan22 | Condition report on a battery box, recommending an overhaul of the dynamo and starter motor switch. | ||
| View original record | Contd. -4- EFC4/T7.11.23. Battery Box. This is in good condition with one exception, namely, that the hollow stay bar running from the side member to one supporting arm is broken near to its… | ||
| Scan23 | Trial run of a new Hispano Suiza car, comparing its engine and brake performance against a 1923 model. | ||
| View original record | To R. from Hs. c. to CJ. c. to Rs. c. to Da. c. to BY. ORIGINAL. Hs1/L.09.11.23. HISPANO SUIZA. Y4214 Y446 extract Yesterday we had a trial run on a new latest type Hispano Car. This was arranged by… | ||
| Scan24 | Road test report on a car's braking, steering, and suspension, recommending the purchase of a second-hand Hispano. | ||
| View original record | contd:- -2- One test we made, we pulled up from 30 m.p.h. in 48 ft. - at 20 m.p.h. to 25 ft. When the brakes were applied hard, the back wheels skidded but we did not get the front wheels to skid. We… | ||
| Scan25 | The violent braking and good turning circle of a Hispano car. | ||
| View original record | contd:- -3- least pressure on the foot pedal, the brakes are applied so violently that the driver is flung forward and exerts further pressure on the brakes which locks the back wheels. The turning… | ||
| Scan26 | The braking performance of a 40/50 HP chassis, detailing issues with the front brakes and modifications to the servo system. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs1/LCLC.11.23. To R. from Hs. c. to CJ. c. to RG. c. to Ba. c. to EY. E.A.C-3. We have had a short run on the first… | ||
| Scan27 | Modifications to the 4-wheel servo brake system to improve braking balance. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL. Expl. No. 9940 REF:- Hs1/LG10.11.23. EXPERIMENTAL REPORT. To R. from Hs. c. to C.J. c. to Rg. c. to Da. c. to EY. E.A.C-3 - 4-WHEEL BRAKES. In our… | ||
| Scan28 | Noting that the car steers to the right upon braking due to an imbalance in the front brakes. | ||
| View original record | R.R. 493 A (40 H) (SL 42 12-7-23). J.H., D. -2- Expl. No. 9940 REF: Hs2/Ld12.11.23. EXPERIMENTAL REPORT. as we had on the original chassis. They appear to come on with less pressure than on the other… | ||
| Scan29 | Failed rear axle pinion on an Isotta Fraschini car during final road tests. | ||
| View original record | To R. from Hs. c. to CJ. RG. c. to BY. DA. Heb/LG:13.11.23. ISOTTA FRASCHINI CAR. +4609 On the final road tests of this car, the rear axle failed. We found on examination that all the teeth were… | ||
| Scan30 | Comparing the 20 HP Lanchester and 20 HP Sunbeam cars after a recent motor show. | ||
| View original record | To R. from Hs/RM c. to RO. BY. c.g. c. to DA. E. cc to RP.✓ WDR.✓ ORIGINAL X.446 X441 Hs/RmL/LG13. 11. 23. We had an opportunity of trying several 20 HP. cars while we were at the recent Motor Show.… | ||
| Scan31 | Comparing the 20 HP Lanchester and 20 HP Sunbeam cars following test drives at a motor show. | ||
| View original record | To R. from Hs/Rm. c. to CJ. RG. BY. c. to DA. E. EP. c. to WOr. Hs/Rml/LG13.11.23. We had an opportunity of trying several 20 HP. cars while we were at the recent Motor Show. Two of the most… | ||
| Scan32 | Performance and technical report on the 20 HP Sunbeam Car. | ||
| View original record | 20 HP. SUNBEAM CAR. GENERAL PERFORMANCE. This model is very pleasant to drive. It does not profess to be particularly silent or smooth running but in spite of this, it does everything very nicely. Its… | ||
| Scan33 | Continuation of a report with comments on a three-speed gearbox and suspension performance. | ||
| View original record | contd;- -2- quiet on second for so big a drop. (This was a three-speed box.) SUSPENSION. Very good. The road holding and cornering qualities of this car are really exceptional. I believe it has very… | ||
| Scan34 | Performance and comparison report on the 20 HP Lanchester car. | ||
| View original record | 20 HP. LANCHESTER CAR. GENERAL PERFORMANCE. This is a disappointing car. The makers appear to have gained nothing in the way of power by their over-head Camshaft, and lost a good deal in the way of… | ||
| Scan35 | Test report on a demonstration car, evaluating its steering, gearbox, suspension, and brakes. | ||
| View original record | contd:- -2- efficient as those of the 20 HP. Sunbeam, though they are controlled by foot pressure in the same way. It requires quite an effort to skid the wheels even on a slightly greasy surface;… | ||
| Scan36 | Comparative test report on the Goshawk Dynamo Brush Gear. | ||
| View original record | ORIGINAL. To R & E. from EFC. EFC2/T13.11.23. c. CJ. & PN. c. HY. KP. DA. X.4333 - GOSHAWK DYNAMO BRUSH GEAR. A comparative test of the running of the Goshawk brush gear in the original condition with… | ||
| Scan37 | Instructions regarding the testing and performance of modified commutator brushes for Goshawk dynamos. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No: A B 92. Customer's No.: 1 Modified Commutation of Goshawk Dynamos. A set of Z brushes has been run… | ||
| Scan38 | Instructions detailing observations on commutator brush wear and discolouration after two test runs. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. Z + 19 at the trailing edges of the segments & was somewhat irregular in its… | ||
| Scan39 | Test report on a 20 HP rear axle pinion failure following dynamometer testing. | ||
| View original record | ORIGINAL To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to E. c. to BY. Hs4/LG13.11.23. 20 HP. REAR AXLE - X.4256. After the failure of the 20 HP. Rear Axle Pinion under normal conditions in Spain,… | ||
| Scan40 | The investigation on the E.A.C-1 Engine. | ||
| View original record | R.R. '403 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WOR. By. E Da. EP. PN. OY. RG Expl. No. X. 9771 REF. Hs1/LGb4.11.23. OBJECT OF TEST. Investigation on… | ||
| Scan41 | Comparing the thermal efficiencies and heat distribution of an E.A.C-1 engine and a standard 40/50 RR engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -1- Expl. No. 9771 REF: Hs1/LGI4.11.23. EXPERIMENTAL REPORT. THERMAL EFFICIENCIES AND HEAT DISTRIBUTION OF E.A.C-1 ENGINE & STD. 40/50 RR. COMPARED. The… | ||
| Scan42 | Data sheet detailing the heat distribution and thermal efficiency of an E.A.C-1 engine with a Knave carburetter and standard induction system. | ||
| View original record | HEAT DISTRIBUTION & THERMAL EFFICIENCY OF E.A.C-1 ENGINE KNAVE CARBURETTER - STD. E.A.C. INDUCTION SYSTEM. PAGE 1. Fuel - Shell No. 2. Sp.gr. = .759 Cal. Val (lower) = 19000 B.Th.U's/Lb. Bar: - 757… | ||
| Scan43 | Data tables showing heat distribution expressed as a percentage of heat supplied at different RPMs for two engine models. | ||
| View original record | PAGE 2. HEAT DISTRIBUTION CONTD:- E.A.C-1. Expressed as % of Heat Supplied. R.P.M. | Heat supplied. | Th.Eqvt. Wk.done. | Loss to friction. | Loss to jackets. | Exh.Radiation & pumping (diffce.) 600 |… | ||
| Scan44 | Comparison of efficiencies for the STD 40/50 RR and E.A.C-1 configurations, including data on thermal efficiency and valve timing. | ||
| View original record | PAGE 5. COMPARISON OF EFFICIENCIES OF STD. 40/50 RR. & E.A.C-1 WITH THE 'AIR STANDARD' EFFCY: 40/50 RR. Comp: ratio = 3.99 E.A.C.1 " " = 4.6 'Air standard' = 1 - 1/R^(r-1) --- TABLE 1: | R.P.M. |… | ||
| Scan45 | Energy diagram for a 40-50 engine with a compression ratio of 3.9, plotting energy distribution against RPM. | ||
| View original record | ENERGY DIAGM OF THE 40-50 R.R. COMP: RATIO 3.9. SEE SHEET 2. % OF THE INITIAL PETROL ENERGY. R P M LOSSES THRO - COOLING WATER. EXH. GASES RADIATION CHARGING WK. INDICATED TH. EFFCY PISTON POWER MOTOR… | ||
| Scan46 | Improvements made to the Goshawk dynamos, detailing changes to brushes, springs and the commutator. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.,D. EXPERIMENTAL REPORT. Expl. No. 14353. REF:EPC/M14.11.23. X4353 To R. from EPC. C. CJ. C. EY. C. Mr. Brock. RE GOSHAWK DYNAMOS. With reference to your… | ||
| Scan47 | The performance and characteristics of different generator brushes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Contd. -2- Expl. No. 4383 REF: WMB/T14.11.23. Le Carbone. { L.F.C.2 as found on a Bosch generator } .00072 ohms per inch cube. } Soft… | ||
| Scan48 | Page 3 of an experimental report discussing improvements in commutation and experiments on noise in dynamos. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Contd. Expl. No. 4383. REF: EFC5/T14.11.23. the major improvements as regards commutation, and owing to the fact that EP. has… | ||
| Scan49 | Testing 4-wheel brakes and rectifying 'jagger' issues. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expt. No. 9940 REF: Hs3/LG14_11.23. To R. from Hs. c. to CJ. RG. c. to Da. BY. 4-WHEEL BRAKES. X.9940 X.4214 We wired you today stating… | ||
| Scan50 | Use of finer gauge fuses for the field circuit on Goshawk and E.A.C. chassis. | ||
| View original record | To R. from EFC. c. CJ. ORIGINAL EFC3/T14.11.23. X9960 X4410 X4338 X.9560 - WIRING OF GOSHAWK & E.A.C. CHASSIS. We thank you for your R8/M12.11.23 and note that it is preferred to keep the E.A.C.… | ||
| Scan51 | 30-hour running test on a 20 HP rear axle and proposing an extension to 50 hours. | ||
| View original record | To R. from Hs. c. to CJ. EG. c. to DA. BY. c. to E. ORIGINAL Hs2/LG14.11.23. 20 HP. REAR AXLE. X4256 On a 20 HP. rear axle fitted with 11/50 axle coarse teeth with the pinion made in air hardened… | ||
| Scan52 | Test report on a 20 HP rear axle pinion failure after 34 hours of running at maximum torque. | ||
| View original record | To R. from Hs. c. to CJ. c. to Rg. c. to Da. c. to BY. c. to E. ORIGINAL Hs3/LG15.11.23. 20 HP. REAR AXLE. X4256 The 20 HP. rear axle fitted with 11/50 gears with the pinion made from air hardened… | ||
| Scan53 | Inconsistent 4-wheel braking system, where the epicyclic distribution device was found to be locking up. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: HSR/JGMS.11.23. To R. from Hs. c. to CJ. c. to Rs. c. to Ds. c. to BY. 4-WHEEL BRAKES. On the car fitted with… | ||
| Scan54 | E.A.C-1 engine investigations into the draining boiler and hot-spot. | ||
| View original record | R.R. 403 (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. 9770 9070 REF. Hsl/LG16.11.23. OBJECT OF TEST. E. A. C-1 ENGINE… | ||
| Scan55 | The E.A.C-1 induction system and experiments on the hot-spot. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/AC11/1614.11.23 REPORT ON THE E.A.C-1 INDUCTION SYSTEM AND EXPERIMENTS ON THE HOT-SPOT. The tests were carried out… | ||
| Scan56 | Engine performance, focusing on fuel distribution and the R.A.C. hot-spot. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -2- Expl. No. REF:Hs/ADL1/LG161123 EXPERIMENTAL REPORT. (1) DISTRIBUTION. From consideration of the petrol consumption and power output at low speeds with… | ||
| Scan57 | The results of testing different types of hot-spots, including a comparison between cast iron and aluminium. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL1/L.G1611.23 supplied if the mixture is strong and the hot spot is not at its maximum running temperature. If… | ||
| Scan58 | Summarizing tests on an aluminium hot spot's efficiency compared to cast iron. | ||
| View original record | R.R. 493A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL1/1.C161123 under the same conditions gave only .2 pts/hr. By increasing the heat supply to the aluminium no… | ||
| Scan59 | Reporting the failure of an E.A.C. Pendulum Lever during a bumping test and recommending a design review. | ||
| View original record | To BY. from Hs. c. to Wor. ORIGINAL Hs1/LG17.11.23. E.A.C. - PENDULUM LEVERS. 49430 We have broken an E.A.C. Pendulum Lever on the bumping test. This failed after 17 hrs. running. This is a worse… | ||
| Scan60 | Results of an investigation into an Exide 6XNS battery for the Goshawk Electrical System. | ||
| View original record | C. G.W. to F.M. C. DA. EP. BY. H.H. ORIGINAL EFC1/20.11.23. X.4138 - GOSHAWK ELECTRICAL SYSTEM. In addition to our report EFC4/T7.11.23, sent under cover of our EFC9/TS.11.23, the results of the… | ||
| Scan61 | Continued memo regarding the return of a battery to the Repair Department and the futility of inspecting its elements. | ||
| View original record | Contd. -2- EFC1/T20.11.23. Will Hm. kindly say whether the battery should be returned to the Repair Dept. to be again put on the chassis. We should not expect to learn very much by opening up this… | ||
| Scan62 | Summarizing a test on the Goshawk dynamo brush gear, concluding increased spring pressure leads to excessive wear. | ||
| View original record | ORIGINAL To R & E. from EFC. c. CJ. & PN. c. HY. EP. DA. EFC1/T21.11.23. X.4383 - GOSHAWK DYNAMO BRUSH GEAR. The Goshawk dynamo brush gear test with the heavier brush spring pressure applied to the… | ||
| Scan63 | Test report on Goshawk Z dynamo brushes with increased spring pressure. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No: AB.93. Customer's No. / Date: 20 Nov. 1923 X4383 Goshawk Z Brushes with Increased Spring Pressure. A… | ||
| Scan64 | Instruction sheet detailing brush wear and spring pressure measurements. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 19 To Order No Customer's No. Z The brush wear however is slightly more than with the normal spring pressures; being:-… | ||
| Scan65 | Calculations for front wheel brake torque and weight transfer during deceleration. | ||
| View original record | R.R. 492A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 1559 49940 REF:Hs/Rm2/LG22.11.23. To Da. from Hs/Rm. FRONT WHEEL BRAKES. We gave the figure of 40,000 inch.lbs. as… | ||
| Scan66 | Page calculating torque on front wheels and its effect on steering pivots and springs. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H. D. -2- Exptl. No. 1559 REF: Hs/Rm2/LG22.11.23. EXPERIMENTAL REPORT. equal to (55 X .6) cwts. or 33.0 cwts. If we now lock our front wheels on a surface having a… | ||
| Scan67 | Calculations for the change in weight fraction on the rear wheels of a car during deceleration. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 1559 REF: Hs/Rm2/LG22.11.2 x = h tan θ = h wf / gW = hf / g Required to find change in fraction of weight on the rear wheels… | ||
| Scan68 | Two graphs plotting deflection against torque for a single steering pivot. | ||
| View original record | 15 These figures plotted for one steering pivot only. That is all torques halved. DEFLECTION AT A TORQUE 21,250 ins lbs . .133" x .133" DEFLECTION INS - Test carried to torque of 6,750 ins lbs only.… | ||
| Scan69 | Performance issues of the E.A.C. dynamo compared to the Goshawk machine, particularly regarding magnetic reluctance. | ||
| View original record | To R & E. from EFC. C. CJ. WOR. EX. X.9660 - E.A.C. DYNAMO. With reference to your RS/M21.11.23, presumably it would not be intended to equip the 40/50 car with a complete R.R. electrical system until… | ||
| Scan70 | Note about the decision not to issue machine performance curves due to late cutting in. | ||
| View original record | Contd. -2- EFC2/T23.11.23. size, though we do not propose to issue curves at the moment owing to the late cutting in possessed by the machine. EFC. | ||
| Scan71 | Comparison of estimated and observed Goshawk quantities for a shunt machine operating at the cutting-in point. | ||
| View original record | 23.11.23. ESTIMATED AND OBSERVED GOSHAWK QUANTITIES OPERATING ON THE CUTTING IN POINT AS A SHUNT MACHINE. (HOT) Estimated. Observed. Armature resistance at 100ºC. .48 .49 Field resistance at 100ºC.… | ||
| Scan72 | Comparison of estimated and observed quantities for an E.A.C. Dynamo operating on the cutting in point as a shunt machine. | ||
| View original record | 23.11.23. E.A.C. DYNAMO - ESTIMATED AND OBSERVED QUANTITIES OPERATING ON THE CUTTING IN POINT AS A SHUNT MACHINE. (18 SWG. FIELD BINDING) (HOT) Estimated. Observed. Armature resistance at 100°C. .38… | ||
| Scan73 | Modifications to floating fulcrum type four-wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expt. No. 9940 REF: HS/7/LJ.23.11.23. To R. from Hs. c. to CJ. c. to Rg. c. to De. c. to EY. FOUR WHEEL BRAKES. With regard to the… | ||
| Scan74 | The performance and noise issues of a post-war Bosch dynamo with a combined regulator and cutout. | ||
| View original record | ORIGINAL To E. A & E. from EPC. c. GJ. & PH. c. HY. EP. WOR. EFC4/T23.11.23. X4662 - POST-WAR BOSCH DYNAMO WITH COMBINED REGULATOR AND CUTOUT. Further to our EFC1/T11.9.23, this unit complete, as… | ||
| Scan75 | The cause of humming and vibration felt on the chassis floorboards. | ||
| View original record | Contd. -2- EFC4/T23.11.23. slots which are not skewed, to avoid this condition of humming. The number of teeth in this armature is 20, (two coils per slot, hand wound), as against 29 in our machine.… | ||
| Scan76 | Test results comparing the durability of an air hardened steel pinion with a case hardened one for a 20 HP rear axle. | ||
| View original record | ORIGINAL To R. from Hs. c.c. to CJ. c.c. to Rg. c.c. to E. c.c. to Da. c.c. to SY. Hs4/LG26.11.23. 20 HP. REAR AXLE. 4256 We have tested the fine pitch rear axle pinion made from the air hardened… | ||
| Scan77 | Tests conducted on the E.A. C-1 Engine. | ||
| View original record | L.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL 2 COPIES TO: (BC) BJ. WOR. DY. (E) Da. EP. PN. DY. RG Expl. No. 9770 REF. 9060REF. Hs5/LC26.11.23. OBJECT OF TEST. Tests on E.A.… | ||
| Scan78 | The failure of umbrella valves on the E.A. C.1 engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9770 9060 REF: HBD/L526.11.23. FAILURE OF UMBRELLA VALVES (E.70818) ON E. A. C.1 ENGINE. All the exhaust valves of this type… | ||
| Scan79 | Inadequate valve heat flow and torsional fractures in E.A.C. valve springs. | ||
| View original record | R.R. 403A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9770 9060 REF: HBB/LU26.11.23. have been conducted from the non-seating part of the rim. These results seem to indicate that… | ||
| Scan80 | Bump tests conducted on a 40/50 chassis equipped with 4-wheel brakes. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: [crossed out: R.Co. Sir H.R. By. E. Da. EB] [handwritten: JRM. OY CG] Expl. No. [crossed out: X9770] X1331 REF. HO/LG… | ||
| Scan81 | Log from a bump test on a 40/50 HP model, detailing component failures and replacements over time. | ||
| View original record | BUMP TEST - 40/50 HP. New scheme of Front Axle and Brakes (C.71030), Steering (C.71205) Radius Rods (N.S.1469, Springs and Fittings (N.S.1409), Side Steering Tube (F.70666). Drum = 105 R.P.M. Tyres =… | ||
| Scan82 | Log of component failures, detailing running times, piece numbers, and particulars of the breakages. | ||
| View original record | -2- Total running time. Running Time. Piece No. PARTICULARS. 27 35 12 38 F.70328 Near side front spring (Firth) Top leaf broken 7" from rear shackle bearing. Replaced by Woodhead top leaf fitted to… | ||
| Scan83 | Requesting feedback on a luggage grid fitted to car 5-G-11, noting concerns about the back rail fixing. | ||
| View original record | DA/EV. from Hs. ORIGINAL Hs3/LG27.11.23. LUGGAGE GRID FITTED TO 5-G-11 CAR. X3524 We should like to know whether you and Sales are satisfied with the luggage grid fitted to this car, if so, we will… | ||
| Scan84 | The particulars of brakes on a Hispano car. | ||
| View original record | ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WOR. BY. E Da EP. PN. OY. RG Expl. No. 4214 REF. Hs5/LG29.11.23. OBJECT OF TEST. Particulars of brakes on HISPANO CAR. TESTER. W. A. Robotham. A. C.… | ||
| Scan85 | Graphs plotting axle movement against load for a Hispano axle in two different positions. | ||
| View original record | AXLE MOVEMENT Hispano POSITION A MOVEMENT Ins .300 .200 .100 2 4 6 8 10 12 14 Cwts LOAD Diagram labels: A, 3 POSITION B .300 .200 .100 Ins 2 4 6 8 10 12 14 Cwts LOAD Diagram labels: B, 3 LOAD | ||
| Scan86 | Schematic diagram of the Hispano front wheel brake linkage. | ||
| View original record | HISPANO FRONT WHEEL BRAKE LINKAGE Diagram Labels & Dimensions: P 1.0 2.5L 3.22 4.305 SERVO. CABLE TO FRONT BRAKE. TO OPERATE CAM. 2.75 Note: WHEN SERVO WORKING, MOMENT ABOUT THIS PT. IS INCREASED MORE… | ||
| Scan87 | Technical drawing of the Hispano rear brake operation mechanism. | ||
| View original record | [ "HISPANO REAR BRAKE OPERATION", "P.", "10.", "2.51", "3.22", "SERVO.", "4.315.", "2.67", "OPERATING CAM.", "BRAKE DRUM.", "2.73", "OPERATING LEVER ON CROSS SHAFT.", "3.325", "LEVER AT END OF CROSS… | ||
| Scan88 | Dimensioned drawing of a Hispano brake shoe. | ||
| View original record | HISPANO BRAKE SHOE Ferodo. Relieved 3/4" each end of Shoe. GUIDE FOR PIN Steel faced for cam action = 113° 4 1/16" 3/4" 2 1/2" 1/4" 9/16" 2 1/8" R 5/8" 1 1/8" 3/16" 12 1/8" | ||
| Scan89 | Design drawing for a silent front drum brake assembly. | ||
| View original record | SILENT FRONT BRAKE. 15.76 DIA. THIS IS THE DIA. IN MEAN BRAKING POSITN I.E. WHEN SHOES ARE JUST IN CONTACT WITH DRUM. 60° OPERATING CAM. FERODO EASED AWAY 3/4" EACH END. SHOE 112° (FERODO) 5.5 RAD.… | ||
| Scan90 | Testing front brakes with a floating fulcrum following alterations. | ||
| 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 Rs. c. to Ds. c. to E. c; to HY. ORIGINAL Expl. No. 1559 REF: Hmd/L/329.11.23. FRONT BRAKES WITH FLOATING… | ||
| Scan91 | Internal secret memo detailing verbal instructions from Mr. Royce for modifications to the 40/50 car's braking system. | ||
| View original record | TO HS. FROM DA. SECRET. DA3/M5.11.23. E. A. C. X9940 Referring to our conversation on Friday, our instructions from Mr. Royce are that E.A.C. 111. is the car that is going to be made in the immediate… | ||
| Scan92 | Proposal for modifications to front brakes, including new shoe designs, servos, and patented schemes for relieving brakes when cornering. | ||
| View original record | TO HS. (crossed out) FROM R. e. to GJ. BY. DA. (handwritten) RE. FRONT BRAKES. X9940 / X1559 (handwritten) We are proposing permanent modifications to obtain the necessary wind off. We are proposing… | ||
| Scan93 | Letter discussing modifications to brake and axle designs, referencing the Goshawk and 40/50 models. | ||
| View original record | (2) Our anxiety at the moment is to get drawings complete and we believe that when the parts are made to these modified designs, it will only be a matter of proportioning the movements correctly which… | ||
| Scan94 | Progress report on brake systems, servos, and the state of design for four-wheel brake chassis modifications. | ||
| View original record | (3) old floating brakes on the back axle of an earlier 40/50 can you tell us if these are more consistent? Fit up brakes you have designs for and do such experiments as you can until you obtain more… | ||
| Scan95 | Status report table for various automotive components across different experimental chassis codes (EAC). | ||
| View original record | (4) ITEM. | EAC.111. | EAC.11. | EAC.1. Front brake balancing gear. | Sent to Derby. | To be arranged to pass through crankcase. | As EAC.I. Same state as EAC.II Radius rods. | Sent to Derby. | Now in… | ||
| Scan96 | Status table tracking modifications and parts for models EAC.111, EAC.11, and EAC.1. | ||
| View original record | (5) ITEM. EAC.111. EAC.11. EAC.1. Modifications to gear-box. Sent to Derby. Sent to Derby. - Radiator(& Louvres.) Standard. About to go to Derby. Sent to Derby. Front cross member & front engine… | ||
| Scan97 | Coachwork modifications required for converting 40/50 and Goshawk models to a four-wheel brake system. | ||
| View original record | ORIGINAL TO IHB. FROM DA/EV. c. to BY. c. to HS. DA/EV2/MB.11.23. re. FOUR WHEEL BRAKES. x9940 x5940 40/50 AND GOSHAWK. We are in some doubt as to how the conversion of cars delivered after the 1st.… | ||
| Scan99 | Three proposed improvements to strengthen the Goshawk bevel pinion following a breakage. | ||
| View original record | TO D.F. FROM R. c. to G.J. HS. E.P. SERIOUS & URGENT re. GOSHAWK BEVEL PINION. X4256 The broken pinion clearly shews that there is a nasty sharp corner due to the helical formation of the gear on the… | ||
| Scan100 | Historical and proposed design improvements for coils, focusing on casing materials and manufacturing processes. | ||
| View original record | R.R. 235a (100 T) (S.H. 159 (1-8-20) G. 2800) TO EFC. FROM R. [Text crossed out: BY] R7/M12.11.23. c. to CL. re. COILS. [Text crossed out: X. 40796] [Text crossed out: X. 4596] A very long time ago we… | ||
| Scan101 | Wiring schemes, arguing for a complete earth system for the 40/50 Goshawk model. | ||
| View original record | R. R. 235a (100 T) (S. H. 159 11-8-20) G. 2800 ORIGINAL SECRET. TO EFC. FROM R. R8/M12. 11. 23. X. 9960. X. 3374. X. 4087. X9860 re. WIRING OF 40/50 GOSHAWK & EAC.1. 11. & 111. All these should be… | ||
| Scan102 | Development of the Goshawk Dynamo, with suggestions on brush materials and design improvements. | ||
| View original record | TO EFC. FROM R. re. GOSHAWK DYNAMO. X4383 Is so. of OK { We hope that those which have been turned out can be expected to give reasonable satisfaction for a long period of use. We must aim at getting… | ||
| Scan103 | Difficulties of developing an automatic release for front wheel brakes for use when cornering. | ||
| View original record | TO RG. FROM R. HS. ORIGINAL R6/M12.11.23. c. to CJ. BJ. c. to DA. FN. re. FRONT WHEEL BRAKES. X1559 X9940 The matter of relieving these brakes auto- matically when passing round a corner is a very… | ||
| Scan104 | Wear issues and proposed design changes for the Goshawk oil pump. | ||
| View original record | TO BY- FROM R. C. to CJ. C. to HS. C. to IP. re. GOSHAWK OIL PUMP. L1232 Regarding the worn oil pump taken from the 10,000 mile Goshawk, the damage looks to me as if it is due to emery in the oil, and… | ||
| Scan105 | Requesting car weight and road friction data for a Hispano-Suiza to analyze pedal pressures. | ||
| View original record | TO HS. FROM DA. re. HISPANO - SUIZA. 44214 Referring to your report HS1/LG91123. it would be useful to us if you could send us the weight of this car back and front, as with the stop distances you… | ||
| Scan106 | Confirmation of a telegram from Royce to Rowledge & Hives regarding testing for brake or control issues. | ||
| View original record | ORIGINAL. CONFIRMATION OF TELEGRAM. [ROWLEDGE &] HIVES. ROYCAR. DERBY. WEST WITTERING. 14. 11. 23. X9940 TO ASCERTAIN IF JAGGERS ARE WITHIN THE BRAKE OR THE FLEXIBILITY OF CONTROL RETEST WITH PARALLEL… | ||
| Scan107 | Telegram from Royce suggesting modifications to a drum and lapping shoes to address 'jaggers'. | ||
| View original record | Copy to Hs. ORIGINAL Agg/40 TELEGRAM RECEIVED 15th. NOV. 1923. ROWLEDGE AND HIVES ROYCAR DERBY. JAGGERS POSSIBLY CAUSED BY FLEXIBILITY OF DRUM SUGGEST TESTING WITH DEEPLY RIMMED ALUMINIUM HOOP PRESSED… | ||
| Scan108 | Two telegrams sent regarding issues and solutions for 'jaggering' four-wheel brakes. | ||
| View original record | TO no. FROM R. HS. c. to SJ. BJ. c. to PN. HA. re. FOUR WHEEL BRAKES. X1557 x9940 (1) We wired you today as below - "QUITE CONVENIENT FOR YOU TO COME ON TUESDAY. JAGGERING BRAKES MANIFESTLY NOT DUE TO… | ||
| Scan109 | List of points discussing improvements and design considerations for a vehicle's braking and suspension system. | ||
| View original record | (2) fairly well damped, and if the brake acts smoothly they should deflect and open as observed with a light braking effort, still without jaggering. (8) So then we definitely believe that it is not… | ||
| Scan110 | The need for a new brake shoe scheme to compensate for front axle flexibility and maintain reputation. | ||
| View original record | (3) (17) We shall never be free from flexibility of mounting of the front axle or of the brake drum and other parts, so we must have a scheme of shoes which makes a smooth and consistent working… | ||
| Scan111 | Stating the decision to not use fine fuses because they are too delicate and prone to failure. | ||
| View original record | TO EFC. FROM R. ORIGINAL R4/M17.11.23. 2 X. 2515 X.4938 Replying to your memo. EFC3/T141123., we do not want to use fine fuses, which are sure to fail occasionally when all is right - they are too… | ||
| Scan112 | Requesting improvements to be made to the 20.HP rear axle. | ||
| View original record | TO DY. FROM R. c. to CJ. WOR. c. to RG. HS. c. to DA. FP. re. 20.HP. REAR AXLE. R2/M17.11.23. Y4256 Referring to memo. HS2/LG141123., please put in hand five pitch, replace pinions with all… | ||
| Scan113 | Average pedal pressure exerted during maximum braking, comparing estimates with data from Isotta. | ||
| View original record | TO HS. FROM DA. DA1/M17.11.23 Y4214 Thank you for the information about Hispano. We note you are going to bring us any additional information when you come. I should like to mention however that I… | ||
| Scan114 | Questioning why improvements from the 6.EX model are not being fitted to the present 40/50 car. | ||
| View original record | R.R. 235a (100 T) (S.H. 159 11-8-20) G. 2800 ORIGINAL RS/M21.11.23. TO HS. FROM R. EY. c. to CJ. RG. c. to WCR. re. PRESENT 40/50. Y2565 I cannot understand why we do not at once fit to the present… | ||
| Scan115 | Recommendation to improve cold weather performance on a 40/50 chassis by fitting radiator louvres and cancelling the thermostat. | ||
| View original record | R.R. 235a (100 T) (S.H. 159 11-5-20) G. 2600 ORIGINAL TO HS. FROM R. BY. [crossed out] c.c. to CJ. WOR. c.c. to HS. R6/M21.11.23. re. 40/50. X3436 [crossed out] X3499 I am certain that this chassis… | ||
| Scan116 | Brake system defects, spring stiffness issues, and a new front axle control scheme. | ||
| View original record | TO CJ. FROM R. c. to RG. HS. c. to Bo. DA. RE. VISIT OF RC. AND HS. TO WW. ON 20th.NOV.1923. Handwritten: X9440 X2628 X1579 X4214 We spent the whole of yesterday on brakes. With the exception of… | ||
| Scan117 | Comparing a Hispano car to their own, noting its pros and cons as a competitor. | ||
| View original record | TO CJ. FROM R. C. to BJ. RG. C. to HS. BA. re. HISPANO CAR. Y4214 Yesterday we had the Hispano here. I will not worry you with a long report (which I have not time to write at the moment) but this car… | ||
| Scan118 | Required modifications to the Goshawk 11 chassis to improve rigidity and create more body space. | ||
| View original record | R.R. 235A (100 T) (S.H. 159 11-8-20) G. 2800 TO HS. FROM R. EX c. to CJ. WOR. c. to RG. ORIGINAL GOSHAWK 11. X3522 JU260 With reference to Goshawk 11. it is imperative that this chassis has additional… | ||
| Scan119 | Proposed modifications for a four-wheel brake system on a 40/50 model. | ||
| View original record | R.R. 235a (100 'T') (S.H. 159 11-8-20) G. 2800 TO HS. BY. RG. FROM R. er to OJ. DA. FOUR WHEEL BRAKES. (40/50 ETC.) X1557 FRONT SPRINGS. It is a decided advantage to increase the length of the road… | ||
| Scan120 | The underframe and stiffeners for an experimental landaulette body on chassis No. 668. | ||
| View original record | TO BY. FROM DA/EV. c. to IHS. c. to HS. RE. EXPERIMENTAL LANDAULETTE ON STIFFENERS. X4270 X4513 We send herewith N.scheme 1492. shewing the underframe complete, consisting of the stiffeners with the… | ||
| Scan121 | Modifications to the pressure distributing gear for 40/50 four-wheel brakes. | ||
| View original record | TO BX.) FROM DA. HS.) ORIGINAL DA1/M22.11.23. c. to OJ. 40/50 FOUR WHEEL BRAKES. X9940 We send herewith a sketch - N.scheme 1704 - shewing how the existing pieces of the pressure distributing gear may… | ||
| Scan122 | Engine speed as the cause of broken induction pipes and suggesting aluminium pistons for cars with piston ring issues. | ||
| View original record | TO BY. FROM E. c. to BJ. c. to HS. PREWAR PISTONS & PISTON RING CLAPS. Handwritten notes: X834, X858, X2748, IX 1506 In reply to your memo. BYll/Pl41123., I have not been able to put before Mr. Royce… | ||
| Scan123 | Conditions for proceeding with a 4-speed gearbox design, while arguing against its necessity and criticizing the Sales department. | ||
| View original record | ORIGINAL SECRET. TO - ES. FROM R. C. to Dr. W. C. to By: H.S. C. to P. S. E. A. C.I. E. A. C.II. AND 40/50. R1/M23.11.23. SUBJECT TO CORRECTIONS. X9770 X2565 To avoid still further delay we have put… | ||
| Scan124 | Arguing for a 3-speed gearbox over a 4-speed gearbox, detailing points for the Directors' meeting. | ||
| View original record | (2) you will see the facility. (10) Mr. Rowledge's views are that he was a 3 speed advocate. Sales at Wolseley's or Napier's converted him to 4 speeds, but now in these days of low gear direct drive,… | ||
| Scan125 | Modifications to the spare wheel carrier for the 20HP and 40/50 models. | ||
| View original record | TO BY. FROM DA/EV. DA/EV1/M23.11.23. c.c. to LHS. c.c. to HS. re. SPARE WHEEL CARRIER. 20.HP. AND 40/50. X3683 X4085 We thank you for your BY/C12/H191123., and the enclosed L.F.396., and think that… | ||
| Scan126 | Discrepancy between potential and intended torque on front wheel brakes. | ||
| View original record | TO HS. FROM DA. ORIGINAL DA1/M24.11.23. FRONT WHEEL BRAKES. X9940 X1559 Thank you for your HS/RM2/MLG221123., We can see that taken in this way you can get over 40,000 lbs inches torque on the front… | ||
| Scan127 | Mr. Royce's recommendation for securing petrol tank stays to allow for frame flexibility. | ||
| View original record | TO HS. FROM E. c. to BY [struck through] ORIGINAL E3/M24.11.23. re. PETROL TANK SUSPENSION. Y32451 Referring to the standardisation sheet you have issued for signature for the petrol tank sus-pension… | ||
| Scan128 | Telegram from Royce suggesting an alteration to a floating fulcrum and lever. | ||
| View original record | ORIGINAL 0303 POST OFFICE TELEGRAPHS X940 Office Stamp: 2 NOV 25 Handed in at: 4.10 M. Office of Origin: Chichester T. Words: 26 Received here at: 4.40 M. To: Hives Roycar Derby Message: Suggest as… | ||
| Scan129 | Suggesting a method to diagnose unnecessary friction in the four-wheel brake mechanism by measuring pull. | ||
| View original record | TO HS. FROM DA. ORIGINAL DA1/M27.11.23. re. FOUR WHEEL BRAKES. X1559 x9960 We think that if you could measure the pull in the vertical rod between the last axle lever and the lever on the brake shoe… | ||
| Scan130 | Proposing experimental alterations to the four-wheel brake system. | ||
| View original record | TO HS. FROM R. c. to CJ. BJ. c. to RG. DA. c. to PN. re. FOUR WHEEL BRAKES. We are proposing experimentally to try the following alterations - The ratio of the balancing gear will be altered slightly.… | ||
| Scan131 | Technical memo discussing modifications to the brake shoe design, including 'servo' or jointed shoes. | ||
| View original record | R.R. 235A (100 T) (S.H. 159 11-8-20) G. 2500 (2) We suggest we twist round the shoe and put a 6" lever on, and by twisting round the shoes we bring the ball actuation joint to the same position as at… | ||
| Scan132 | Brake testing standards, braking force calculations, and proposed brake shoe designs. | ||
| View original record | R.R. 2x54 (100 T) (S.H. 159 11-8-20) G. 2800 TO HS. FROM R. c.c. to:- SJ. BJ. c.c. to:- RM. IVM. ORIGINAL R1/M28.11.23. re. BRAKES. 41559 X99260 In your test of the value of brakes will you always,… | ||
| Scan133 | Steering load and pivot lean on a four-wheel brake chassis following bump tests. | ||
| View original record | ORIGINAL TO HS. FROM DA. DAL/M28.11.23. FOUR WHEEL BRAKES. Referring to your report on bump tests on 4 wheel brake chassis it is evident that the steering is more heavily loaded than in the standard… | ||
| Scan134 | Front road springs and steering gear, including breakages and flexibility. | ||
| View original record | R. R. 2254 (100 T) S.B. 159 (1-8-20) G. 2800 TO HS. FROM R. [Handwritten numbers near top right]: X2676, X4214, X3441 [Stamped]: ORIGINAL re. FRONT ROAD SPRINGS & STEERING GEAR. FRONT SPRINGS. Can you… | ||
| Scan135 | Use of cast iron versus wrought steel for dynamo magnets and the relative cost of laminations. | ||
| View original record | SECRET ORIGINAL TO EFC. FROM R. R3/M30.11.23. C.C. TO DY. E. A. C. DYNAMO. X 9660 Personally I was very surprised to hear that you had arranged to have this fitted with cast iron field magnet and pole… | ||