Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Non-corrosive treatments like Cadmium plating and anodic treatment for various metal parts. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. DY. c. to OY. V1360 HS5/LG3.11.27. NON-CORROSIVE TREATMENT. V1360 The aeroplane builders, especially Faireys, are much more advanced than we are on… | ||
| Scan002 | Experiments with various treatments, including anodic, cadmium, and lead plating, to prevent aluminium screw threads from seizing. | ||
| View original record | X1360 R. From Hy. C. Wcr. C. Hs. Hy1/W9.12.27. RE TREATMENT OF ALUMINIUM SCREW THREADS TO AVOID SEIZURE. Re R.1/M.21.11.27. With regard to the above, we have made experiments on a few scrap parts with… | ||
| Scan003 | Laboratory report on tests to determine the effectiveness of low-temperature heat-treatment in cadmium plating. | ||
| View original record | R. By. c to Hs/EHC. X1360 H11/EA17.12.27. Laboratory. RECEIVED DEC 18 1927 Re Cadmium Plating. We have carried out a series of tests to ascertain whether the supposed alloying of cadmium and iron,… | ||
| Scan004 | On an Inspector's Report form discussing the 'Economy Fetish' of 10,000 miles versus real-world road tests. | ||
| View original record | Economy with "Fetish" of 10,000 miles what we actually get. 10000 miles purely a fuel- and a test of what we have just built. We have laboriously to minimise a series of tests because expensive &… | ||
| Scan005 | Brittleness of springs caused by cadmium plating and suggesting heat treatment as a solution. | ||
| View original record | Hs/Rm. c. Wor. c. Mx. c. Hl. X1360 BY7/G.29.12.27. [STAMPED] RECEIVED 29 DEC 1927 re CADMIUM PLATING. With reference to the list of parts which you suggested for cadmium plating, I have instructed all… | ||
| Scan006 | Properties and testing of chromium-plated road springs. | ||
| View original record | To BY. from Hs/Rm. c. to Wor. c. to MX. c. to HL. X1360 Hs/RmL/LG31.12.27. CHROMIUM PLATING ROAD SPRINGS. X1360 X.8772 With reference to BY7/G28.12.27. We recommend that we endeavour to get at least… | ||
| Scan007 | The benefits of plating road springs to improve suspension, prolong life, and reduce squeaking. | ||
| View original record | contd :- -2- We therefore think that by plating road springs we should gain : (1) Improved suspension. The internal spring friction would remain substantially more constant owing to the elimination of… | ||
| Scan008 | Plating of springs, including issues with brittleness and the advantages of American spring lubrication methods. | ||
| View original record | Hs/Rm. C. Wor. C. Mx. C. H1 X1360 BY2/G.2.1.28. RECEIVED [Circular Stamp: JAN 31] PLATING OF SPRINGS. Referring to Hs/Rml/LG.31.12.27. we will arrange to have two pairs of the present standard front… | ||
| Scan009 | Arguing against the proposal for plating road springs due to the risk of brittleness in the steel. | ||
| View original record | Hs/Rm. C. Wor. C. Mx. C. Hl. X1360 BY3/G.3.1.28. PLATING OF ROAD SPRINGS. ----------------------- Referring to my memo on the above subject, reference BY2/G.21.28. from further consideration I am… | ||
| Scan010 | Suitability of different parts for testing chromium plating, specifically rejecting valve springs and questioning the use of road springs. | ||
| View original record | To Wor. from Hs. c. to BY. c. to H.I. X1360 Hs2/LGS.1.28. CHROMIUM PLATING. X1360 (crossed out) Y6410 We do not wish to have valve springs Chromium plated because we can see no advantage whatever in… | ||
| Scan011 | Clarifying the reasoning for testing the plating process on valve springs before applying it to road springs. | ||
| View original record | Wor. c. Hs. c. Mx. c. Hl. Y/360 BY2/G.6.1.28. RECEIVED PLATING OF ROAD SPRINGS. -------------------------- Referring to BY3/G.3.1.28, I ought to have emphasized the fact when speaking of valve springs… | ||
| Scan012 | Proposal for experiments in chromium plating specific engine and vehicle components. | ||
| View original record | X1360 E. Dept. G. Dept. RHG. ROY. c. Hs. c. Wer. BY/L/G.9.1.28. RECEIVED EXPERIMENTS IN CHROMIUM PLATING. It is suggested that we should plate with chromium a certain number of parts which are subject… | ||
| Scan013 | Potential improvements for 40/50 HP water pumps, focusing on the friction drive and glands. | ||
| View original record | To E. from Hs/Rm. [Handwritten]: X1360 Hs/Rm2/LG9.1.28. [Handwritten]: X8150 [crossed out] [Handwritten]: X1360 40/50 HP. WATER PUMPS. ------------------------ We send you herewith some information… | ||
| Scan014 | Page two of a memo discussing the results of a device test and suggesting material improvements. | ||
| View original record | contd :- -2- eliminate gland leakage. In the very crude device which you will see we have tested, we did not get any very noticeable pick up. You will note from OY's remarks that the wooden thrust… | ||
| Scan015 | Implementation of Chromium and Cadmium Plating, addressing perceived delays. | ||
| View original record | To BR. from Wor. c to Hs. c to Mr. c to Hf. X1360 Wor13/T.10.1.28. CHROMIUM PLATING Further to your memo of the 6th inst (BY2/GG.1.28), I understood quite clearly in your previous memo that the reason… | ||
| Scan016 | Recommending cadmium plating for steel control parts and supercharger diffuser rings on aero engines to prevent rusting. | ||
| View original record | To By. from Rg. c. Wor. Hs. X1360 Rel/LW.11. 1. 28 AERO ENGINES We think all the steel control parts on aero engines should be cadmium plated, standard as soon as possible. We find that engines in… | ||
| Scan017 | Determining the necessity of dimensional allowances for cadmium plating on control parts and diffuser vanes. | ||
| View original record | Rg. C. Wor. C. Hs. X1360 CADMIUM PLATING. Referring to Rg1/LW.11.1.28. I am taking a typical set of control parts and plating same with the object of ascertaining whether it will be necessary for us… | ||
| Scan018 | Proposal for testing chromium-plated springs for hydrogen brittleness and comparative results. | ||
| View original record | RHC. H1. C. Hs. X1360 BY17/G.13.3.28. In regard to the question of chromium plating springs, a further proposal has been put forward which appears to me to be a reasonable way of dealing with the… | ||
| Scan019 | Standardisation of a Cadmium plated and stove-enamelled external finish for aero engines. | ||
| View original record | To Dy. from Fl. c. to Cr. [crossed out] c. to Rg. [crossed out] c. to Hs. [crossed out] c. to DI [crossed out] Handwritten: Hs X1360 External Finish of Aero Engines. It was agreed at Derby that the… | ||
| Scan020 | Application of centralised chassis lubrication for the India 3 model, including battery suspension and brake gear. | ||
| View original record | BY. from DA. c. to BJ. Hs. X1360 DA1/M17.3.23. INDIA 3 - CENTRALISED CHASSIS X.3806 LUBRICATION ETC. X.1360 We send herewith N.sch.2561 shewing the application of centralised lubrication to the rear… | ||
| Scan021 | Meeting with Mr. Einstein regarding his electro-chemical deposition metalising process. | ||
| View original record | HS X1360 To BX. from Fl. c.c. to Rg., Hs., Sg. & Py. British Airships Ltd. - Metalised Materials. I visited Mr. Einstein at his London address: Room 604, Hotel Victoria, Northumberland Avenue,… | ||
| Scan022 | Mr. Einstein's proposal for a metalizing factory and a suggestion for a trial order on a cylinder water jacket. | ||
| View original record | -2- FL.1/AV/DS.4.28. give him any indication that we should be likely to furnish him with such a letter. Mr. Einstein's idea is to open a factory in this country in the district from which he expects… | ||
| Scan023 | Test results for a chromium-plated water pump spindle, noting an improvement over the Staybright spindle. | ||
| View original record | To BY. from Hs/Rm. Y1360 Hs/Rnl/LG27.4.28. CHROMIUM PLATED WATER PUMP SPINDLE. +8150 We have now completed our tests on the chromium plated water pump spindle. The results shew a definite improvement… | ||
| Scan024 | Request to prepare and cadmium plate standard front road springs for a bump test. | ||
| View original record | X1360 To RHC. from Hs/Rn. Hs/Rm3/LG22. 5. 28. X1360 X8410 We want to try a pair of cadmium plated standard front road springs on the bump test. Will you therefore please prepare the springs, as… | ||
| Scan025 | Copy of a telegram suggesting to chromium plate the bore of a blade rod. | ||
| View original record | HS. BY X 1360 Rg4/LW.8. 6. 28 The following is a copy of a telegram we have received from R.:- "SUGGEST CHROMIUM PLATING BORE OF BLADE ROD." Rg. | ||
| Scan026 | Testing cadmium-plated road springs, detailing wear patterns, life expectancy, and recommendations for further trials. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wor. c.c. to DA. BY: c.c to E. X1360 Hs/Rm3/LG26. 6. 28. CADMIUM PLATED ROAD SPRINGS. X1360 X7410 X8410 We have run a pair of front springs cadmium plated 2000 miles in… | ||
| Scan027 | Request for cadmium plating of front and rear road springs with specified unloaded camber details. | ||
| View original record | X1360 RHC. from Hs/Rn. Hs/Rn1/LG29.6.28. +8410 Will you please arrange for 3 pairs of 1150 lbs. front road springs to be cadmium plated, and one pair of 2000 lbs. rear springs to be treated in the… | ||
| Scan028 | Instructions regarding the cadmium plating of a car's springs at the Works. | ||
| View original record | To EP. from Hs/Rm. X1360 X8950 Hs/Rml/LG4.7.28. With reference to PN2/WT3.T.28. You will doubtless arrange for the Works to carry out this job. With reference to the cadmium plated springs. The Works… | ||
| Scan029 | Test report on a centralised lubrication scheme, noting a cracked pipe and the performance of a cadmium-plated road spring. | ||
| View original record | X1360 To R: from Hs/Rm. c. to BJ: Wor. c. to E. DA. c. to BY. Hs/Rm2/LG17.7.28 CENTRALISED LUBRICATION. X8410 X3806 The centre point lubricating scheme has now run 70 hrs. on the bump. The only… | ||
| Scan030 | Potential improvements to vehicle riding qualities, covering tyres, springs, and shock dampers. | ||
| View original record | Hs. CWB. from R. c. to BJ. Wor. BY. V1360 R1/M23.7.28. RIDING QUALITIES. X.4565 X.1360 X.5820 X.235 X.5410 I hope to receive shortly a report shewing improvements due to :- (1) 6" low pressure tyres… | ||
| Scan031 | The correct road springs for the 17-EX experimental car, including specifications and sourcing instructions. | ||
| View original record | RHC. from Hs/Rn. X1360 Hs/Rn4/LG24.7.28. 17-EX - ROAD SPRINGS. X7410 X1360 The correct springs for this car are :- Front 1000 lbs. Initial camber 2.1" Rear 1500 lbs. 25% stiffer type. Initial camber… | ||
| Scan032 | Request to have the new type rear springs cadmium plated before they are fitted. | ||
| View original record | X1360 To RHC. from Hs/Rn. Hs/Rm5/LG24. 8. 28. 12-EX. X7410. Will you please have the new type rear springs of this car cadmium plated before they are fitted. Hs/Rn. | ||
| Scan033 | New scheme for rear springs, requesting a standard pair be cadmium plated instead of using a special type. | ||
| View original record | To RHC. from Hs/Rm. X1360 Hs/Rml/LG27.8.28. 12-EX - REAR SPRINGS. X7410 X1360 We have now been promised a scheme from WW. which will enable the standard type rear spring to be used with centrepoint… | ||
| Scan034 | Requesting the inspection of cadmium-plated front springs for testing purposes. | ||
| View original record | X1360 To RHC. from Hs/Rn. Hs/RnL/LG5. 9. 28. CADMIUM PLATED FRONT SPRINGS - 12-EX. X1360 X7410 Will you please strip one of these springs in order that we may see how the plating is standing up. The… | ||
| Scan035 | Clarifying the experimental status of cadmium plating for springing and requesting its availability for standard production. | ||
| View original record | Mr Hives Ib S/W. Hs...from PN. [struck through] Copy to OWB [struck through] X1360 PN.3/WT22.9.28. In your recent long memo in connection with springing - a reference was made to the use of cadmium… | ||
| Scan036 | Non-standardisation and issues with cadmium plating on springs. | ||
| View original record | To PN. from Hs/Rm. X1360 Hs/Rml/LG24.9.28. X1360 / X8410 With reference to PN3/WT22.9.28. We see nothing in our memo. which indicates that plated springs have been standardised. Cadmium plating has… | ||
| Scan037 | Requesting the cadmium plating and re-fitting of 1600 lbs. rear springs for the 10-EX car. | ||
| View original record | To RIC. from Hs/Rm. (1360) Hs/Rn5/LG25.9.23. 10-EX CAR. X1360 F7460 Will you please cadmium plate the 1600 lbs. rear springs that have been removed from the rear of this car and re-fit them when next… | ||
| Scan038 | Proposal to chromium plate an experimental car to gain practical experience with the finish and to test an external supplier. | ||
| View original record | Hs. X1360 BY4/G.27.9.28. CHROMIUM PLATING. ---------------- I suggested to Sales that one of our Experimental cars should be chromium plated as an example of this type of finish, and further it would… | ||
| Scan039 | Clarifying a point about the standard specification of cadmium-plated springs. | ||
| View original record | X1360 S/W (Hs/Rm). from PN. PN6/LH27.9.28. 24.9.28. In PN's absence I am replying to your Hs/Rml/LG The paragraph in your original long memo ref. Hs/Rml/LG6.9.28. to which PN referred is the first… | ||
| Scan040 | Query regarding instructions for cadmium plating special road springs on chassis GKM-33. | ||
| View original record | To Wor. from Hm. [Wor. is crossed out] C. to BY. C. to Hs. [Handwritten]: X1360 Hm4/W28.9.28. When I was at N. this week, Br. pointed out to me a new car, Chassis GKM-33, which was fitted with special… | ||
| Scan041 | Suggestion to use chromium plating on a new car, recommending the 'India-4' model. | ||
| View original record | X1360 To BY. from Hs. Hs3/LG28.9.28. CHROMIUM PLATING. We suggest that one of the new cars we are building is instructed with chromium plating. This means either the third 'SS' 20-EX, or the third… | ||
| Scan042 | The use of chromium plating on one of two new car models being built. | ||
| View original record | To BY. from Hs. Y1360 Hs3/LG28.9.28. CHROMIUM PLATING. We suggest that one of the new cars we are building is instructed wi th chromium plating. This means either the third 'SS' 20-EX, or the third… | ||
| Scan043 | Letter to Solex Ltd. arranging a visit to their Paris laboratory and discussing carburetter and crankshaft design. | ||
| View original record | X1360 Expl: Dept: Hs/Rm4/LG29th. 29th. Sept. 1928. Messrs. Solex Ltd., 223-231 Marylebone Rd., London N.W.1. X1360 Y1053 Dear Sirs, For the attention of Mr. Mantell. Further to our telephone… | ||
| Scan044 | The unauthorized cadmium plating of springs on chassis GKM-33 and the halt of this practice pending standardization. | ||
| View original record | Hm. c. Worr c. Hs. ---- X1360 BY/1/G.2.10.28. CHASSIS GKM-33, WITH CADMIUM PLATED SPRINGS. -------------------------------------------- Your memo Hm4/W28.9.28. The springs on the above car had been… | ||
| Scan045 | Recommendation for cadmium plating on Phantom chassis parts based on long-term testing. | ||
| View original record | K1360 To R. from Hs/GWH. Hs/GWH1/LGS.10:28. c. to B.J. Wor. c. to E. DA. c. to BY. PHANTOM CHASSIS. RE. CADMIUM PLATING. We recommend the following parts to be cadmium plated. We have run 10,000 miles… | ||
| Scan046 | Parts list for the Water Pump Drive and Governor assembly of an engine unit. | ||
| View original record | ENGINE UNIT. WATER PUMP DRIVE COMPLETE AND GOVERNOR. Drg. No. Item. Drg. No. Item. E.74432 Shaft. E.72072 Bush. E.72100 Locking nut. E.72076 Screw. E.76419 Driving piece. E.72073 Link Brg. Bush.… | ||
| Scan047 | Parts list for an ignition distributor, clutch, and slipper wheels & spring drive. | ||
| View original record | IGNITION DISTRIBUTOR. Drg. No. Item. D.50710 Cam. E.74202 Shaft. K.2713 Screw. CLUTCH. G.76376 Spherical brg. & cover. G.76288 Clutch drive piece. G.76290 Clutch shaft. SLIPPER WHEELS & SPRING DRIVE.… | ||
| Scan048 | Parts list for the complete servo linkage assembly. | ||
| View original record | SERVO LINKAGE COMPLETE. Drg. No. ITEM. G. 72562 Full rod. G. 72526 " " G. 73353 " " G. 72510 Short type jaw. G. 72510 Long " " G. 72118 & G. 72510 Jaw. G. 72473 Levers. G. 72509 G. 72508 Servo drag… | ||
| Scan049 | Parts list for the servo shaft, fittings, and associated pedals. | ||
| View original record | SERVO SHAFT AND FITTINGS. Drg. No. Item. G.74848 Servo Shaft. G.72476 Friction plate driving disc. G.72470 Retaining plate. G.75559 Adjusting Nut. G.728990/1 Levers. G.74779 Adjusting Nut Washer.… | ||
| Scan050 | List of drawing numbers and part names for front and rear brakes, with additional notes on other vehicle components. | ||
| View original record | FRONT BRAKES. Drg. No. Item. G.74224 Distance Piece. G.70023 Pin. G.74237/8 Toggle forks. G.74560/1 Toggle shaft. G.74246 Pivot caps. G.74243 Bottom Plate. E.6432 Nuts. F.10886 Washers. G.74223 Nuts.… | ||
| Scan051 | Standardisation of cadmium plating and the bedding of leaves for road springs. | ||
| View original record | X1360 To B.J. from Hs. Hs4/LG8.10.28. ROAD SPRINGS. X1360 X7410 X8410 With reference to attached correspondence in connection with the above. We are working with the object of standardising cadmium… | ||
| Scan052 | The availability and application of chromium plating for exterior car fittings, including the radiator. | ||
| View original record | HS. FROM DA/EV. DA/EV2/M10.10.28. re. CHROMIUM PLATING EXTERIOR FITTINGS ON CARS. X1360 We are now able to get the headlamps, door handles, windscreen, and all such exterior fittings, chromium plated.… | ||
| Scan053 | Suggesting modifications to a lightened clutch, flywheel and serrated universal joint to improve lubrication. | ||
| View original record | +1360 Hs. from DA. BA7/MO.10.10.28. LIGHTENED CLUTCH & FLYWHEEL - SERRATED X.7300 UNIVERSAL JOINT. No.5. X.1360 X.7340 With reference to Hs/Rm5/LG2.10.28., we suggest that a thing which might be… | ||
| Scan054 | Provision of a chromium-plated radiator to allow for the fitting of other chromium-plated parts. | ||
| View original record | DA/EV. from Hs/Rm. X1360 Hs/Rm12/LG17.10.28. Y7250 With reference to DA/EV2/M10.10.28. We are obtaining a chromium plated radiator so that you will be able to fit chromium plated headlamps, door… | ||
| Scan055 | Instructions for chromium plating parts for 'SS' cars. | ||
| View original record | To BY. from Hs/Rn. X1360 Hs/Rn11/LG17.10.28. We understand that you are instructing one of the radiators for 'SS' to be chromium plated. If this is so, we can tell Ev. to go ahead with headlamps etc.… | ||
| Scan056 | Issues with chromium plating and recommending to continue with nickel plating as the standard finish. | ||
| View original record | Sg. Hs. X1360 BY/14/G.18.10.28. CHROMIUM PLATING. It is important that my recent decision to permit an owner to have a fully chromium plated car not to be misinterpreted. I still think that chromium… | ||
| Scan057 | Arranging for an experimental 20 HP car to have its nickel parts chromium plated. | ||
| View original record | X1360 To DA/EV. from Hs. Hs6/LG19.10.28. CHROMIUM PLATING. We have arranged for one of the experimental 20 HP. cars shall have all the usual nickel parts, chromium plated. Hs. | ||
| Scan058 | Process and requirements for chromium plating on nickel silver for various car parts. | ||
| View original record | Hs. From DA. X1360 DA2/M20.10.28. CHROMIUM PLATING. X.1360 X.7800 X.7250 With reference to Hs/Rnl2/LG17.10.28, we were informed by Cannings at the Show that it was not possible to chromium plate on… | ||
| Scan059 | Difficulties and commercial viability of chromium plating on chassis. | ||
| View original record | X1360 C. Hs. BY11/G.30.10.28. CHROMIUM PLATING. ----------------- With reference to the suggestion that we should chromium plate the first SS. chassis, which incidentally is the one intended for R.,… | ||
| Scan060 | Investigation into mysterious breakages of cadmium plated screws, identifying hydrogen embrittlement as the cause and proposing heat treatment as a remedy. | ||
| View original record | Sft RHC. Mr. Fendlebury. Hs. Hs. Rg Hl X1360 BY16/G.9.11.28. CADMIUM PLATING. ------------- As a result of having one or two rather mysterious breakages on cadmium plated screws, I had a piece of bar… | ||
| Scan061 | From 'ROY' discussing an offer from Harcourts Ltd for experimental chrome plating on components like crankshafts. | ||
| View original record | X1360 DY. from ROY. c. to Rg. c. to Hs. ---------------- ROY6/MG21.11.28 ---------------- Arising out of your experiments with Nitralloy Steel, Mr. Davies, of Harcourts Ltd, Chrome Platers, tells me… | ||
| Scan062 | Instruction prohibiting the sandblasting of pipes, particularly copper pipes, as a method of cleaning. | ||
| View original record | Rg. Hs. H1. X1360 BY1/G.21.11.28. SANDBLASTING OF PIPES.. Some months ago I issued an instruction to the Works that they must not sandblast pipes, particularly copper, either :- a/- As a means of… | ||
| Scan063 | Comparison of chromium plating with nitrogen hardening, discussing issues of hardness, adherence, and cracking. | ||
| View original record | ROYCE LTD. c. HS. X1360 BY11/G.22.11.28. CHROMIUM PLATING. ----------------- We do not consider so far as our knowledge goes at the moment that the hardness obtained by chromium plating is either :-… | ||
| Scan064 | Methods to improve spring lubrication on the 'SS' model going to France. | ||
| View original record | To DA. from Hs/Rm. X1360 Hs/Rn3/LG11.12.28. 'SS' SPRING LUBRICATION. X7410 We want, if possible, to start the 'SS' off with the best method of spring lubrication that we know of. We shall have cadmium… | ||
| Scan065 | Micro-examination and mechanical test report on cadmium-plated small screwed parts. | ||
| View original record | X 1360 Micro-Examination and Mechanical test Report. M631. By. Hll/EA13.12.28. Laboratory. c to Hs. Re Cadmium Plating on small Screwed Parts. Your Refs. BY/EM1/K.9.11.28. and BY16/G.9.11.28. The… | ||
| Scan066 | Test results and analysis of cadmium plating on test pieces, focusing on fracture angles and potential causes of failure. | ||
| View original record | 2. Table 2. (cont.) Test Piece No. Angle at which Fracture commenced. "As received" Cadmium Plated. 7 40° 40° 8 40° 38° 9 40° 40° 10 40° 40° 11 40° 40° 12 40° 40° Table 3. Test Piece No. Angle at… | ||
| Scan067 | Cadmium plating inducing brittleness in small screwed parts and proposing a special heat treatment. | ||
| View original record | H1. c. Hs. X1360 BY2/G.14.12.28. CADMIUM PLATING ON SMALL SCREWED PARTS. --------------------------------------- Referring to H11/EA.13.12.28. it is evident from your experience that generally… | ||
| Scan068 | Failures and further testing related to cadmium plating on small screwed parts. | ||
| View original record | X1360 -BY. H14/EA171228. M632. Laboratory. c to Hs. Re Cadmium Plating on Small Screwed Parts. Your Ref. By2/G.14.12.28. We note that you are satisfied that the failures complained of definitely were… | ||
| Scan069 | Material embrittlement during the cadmium plating process and the necessity of post-plating heat treatment. | ||
| View original record | Mr. c. Hs. X1360 BY5/G.19.12.28. re MATERIAL EMBRITTLED DURING THE PLATING OPERATION. -------------------------------------------------- I am afraid that it is difficult to hand on bars which we know… | ||
| Scan070 | The re-testing of cadmium plated small screwed parts to determine the angle of breakdown and check for embrittlement. | ||
| View original record | By c to Hs. X 1360 M633. H11/EA20.12.28. Laboratory. Re Cadmium Plating of Small Screwed Parts. Your Ref BY5/G.19.12.28. Of the two samples which you sent to us, the one in the plated condition was… | ||
| Scan071 | Micro-examination report on failed cadmium plated small screwed parts, detailing chemical composition and hardness. | ||
| View original record | X1360 Micro-Examination Report. M639. By. [Strikethrough] H14/EA18.1.29. Laboratory. c to Hs. Re Cadmium Plated Small Screwed Parts. Further to our reports M631/2/3. We have examined the two original… | ||
| Scan072 | Photomicrograph showing the microstructure of a material at 300x magnification. | ||
| View original record | RR 403 (2½H) (DF 568 29-11-28) BM, 2/5733. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A613. MAGNIFICATION : 300 DIAMETERS. | ||
| Scan073 | Instructions for fitting new front and rear springs to car 23-EX, with specified loadings and treatment procedures. | ||
| View original record | To RHC. from Hs/Rn. K1360 Hs/Rm3/LG23.4.29. 47410 Will you please arrange to fit the following springs to 23-EX :- Front 950 lbs. Rear 1200 lbs. These loadings should be obtained at the normal… | ||
| Scan074 | Covering memo discussing correspondence and replies regarding a report on radiator chrome plating. | ||
| View original record | Hs X1360 TO BY from Sg. RRAI. Report on Chassis Alteration No.8. Radiator Chrome Plating. Copy to Hs. Sg9/E23.4.29 BY6/G27.3.29. You will remember the former correspondence and your copy of his reply,… | ||
| Scan075 | Chassis alteration no. 3 regarding radiator chrome plating, comparing cost, appearance, and weight of different radiator constructions. | ||
| View original record | OY11 April 10th, 1929. Mr. A. F. Sidgreaves, Rolls Royce Ltd., Derby, England. cc - Mr. Bailey Mr. Hives Dear Mr. Sidgreaves: Report on Chassis Alteration No.3 Radiator Chrome Plating. Many thanks for… | ||
| Scan076 | Advantages of loose-shell construction and the market demand for automatic shutters and chromium plating. | ||
| View original record | - 2 - Incidental advantages of loose-shell construction not previously mentioned are :- (1) The shell is never uncomfortably hot to handle. (2) Because of the lower temperature, the tendency to… | ||
| Scan077 | Chassis alteration no. 8 dealing with radiator chrome plating. | ||
| View original record | c. Hs. X1360 BY8/G.26.4.29. R.R.A.I. REPORT ON CHASSIS ALTERATION NO. 8 DEALING WITH RADIATOR CHROME PLATING. Referring to OY11 of April 10th. we are satisfied that there is no real necessity from a… | ||
| Scan078 | Urgent internal memo requesting various sets of leaf springs to be cadmium plated and grooved for several cars. | ||
| View original record | X1360 To RHC/HS. from Hs/Rm. Hs/Rm2/LG29.5.29. X7410 Will you please arrange to get the 1100 lbs. rear SS. springs in the Stores cadmium plated and grooved according to the latest practice. These… | ||
| Scan079 | Letter received from the Chrome Process Syndicate Ltd. about chromo-plating samples. | ||
| View original record | S/W. To Mr. from Lp. c. to Hs. HS X/360. Lp2/AV/D18.9.29. With reference to previous memoranda on chromo-plating, we attach hereto copy of a letter received from the Chrome Process Syndicate Ltd. in… | ||
| Scan080 | Letter from Chromo Process Syndicate Ltd. offering to chromium plate samples free of charge for testing. | ||
| View original record | COPY. CHOMO PROCESS SYNDICATE LIMITED. Dashwood House, 69, Old Broad St., London, E.C. 2. 14th August, 1929. Messrs. Rolls-Royce, Ltd., 14, Conduit St., W. 1. For the attention of Willoughby Lappin,… | ||
| Scan081 | Cancelling instructions for chromium plating 'T' Section parts for a 20-HP chassis. | ||
| View original record | X1360 BY/HEB2/M.4.11.29. To. Fay. C. Ins. C. Sty. C. Insp. C. V/Rm. C. M/o. C. Jefferson. C. Hs. Mr. Scott. Mr. Helliwells Mr. Ellis. Mr. Brooks. Mr. Howard. 20-HP. CHASSIS. With reference to our… | ||
| Scan082 | Appearance of chromium plating compared to Staybrite steel. | ||
| View original record | X1360 HS RECEIVED 5 NOV 1929 To Wor. from Sg. re Chromium Plating. Copy to Hy. Hs. Df. EH Referring to the last paragraph of R1/M.30.10.29, I do not know quite who spoke to R. about this but please do… | ||
| Scan083 | Report discussing material and plating changes for parts, including trials on brass and Staybrite for bonnet hinges. | ||
| View original record | Hy4/T14.11.29 contd:-2- This method would also make the process easier of adoption, and would be of less cost. It is also proposed to make parts now produced in nickel silver, and which have to be… | ||
| Scan084 | Instructions for the experimental building of 20 HP and 40/50 HP chassis with modified chromium and Staybrite finishes. | ||
| View original record | E. Dept. F. Dept. G. Dept. D. Dept. C. Hs. C. Wks. C. Sft C. ROV/Ms. X1360 BY/Cgh16/G.5.11.29. re MODIFIED CHASSIS FINISH. ---------------------------- With reference to BY10/G.15.10.29. it is… | ||
| Scan085 | Standardisation, cost, and quality of chromium plating for radiators, chassis and other fittings. | ||
| View original record | To BH from Wor. X1360. WorE/T.11.11.29. --------------- CHROMIUM PLATING. I am pleased to see that you are ordering 10 sets of material for Radiators and other fittings in Brass instead of Nickel… | ||
| Scan086 | Decision on an alternative for chromium plating, fitting it to external parts only, leaving interior parts with a nickel silver finish. | ||
| View original record | F. Dept. E. Dept. G. Dept. D. Dept. Ce. Hy. C. Hs. C. RHC. X1360. BY14/G.13.11.29. As a further alternative for chromium plating, it has been decided that we shall fit one of the existing experimental… | ||
| Scan087 | Investigation into a new chromium plating process and its proposed standardisation for external car parts. | ||
| View original record | To-R. from HY. To Se. [REDACTED] Hs. X1360 Ry4/T.14.11.29. CHROMIUM PLATING. I enclose herewith a copy of Mr. Aspley's report on his visit to the Chromo Process Syndicate's workshop. The results of… | ||
| Scan088 | Instruction to change from close plating to a new electro-plating process for Phantom II & 20/25 HP chassis parts for a 10,000-mile test. | ||
| View original record | X1360. BY/TWD BY/HRP RHC. BY/SC. BY7/N.17.2.30. Re: Phantom 2 & 20/25 HP. Chassis - Electro Plating instead of Close Plating. -------------------------------------------------------- Will you please… | ||
| Scan089 | Extract from Mr. Platford's report on the Spanish Grand Prix, concerning issues with front engine guards. | ||
| View original record | X. 1371. Extract from Mr. Platford's report on Cars in the Spanish Grand Prix. - in X.387. Front engine guards. These broke uo as happens on most cars after use, i.e. expected due to movement of… | ||
| Scan090 | Requesting approval for an immediate alteration to the Front Engine Guard, as detailed in Proposal Sheet No. 24. | ||
| View original record | X1371 To [text struck through] from BJ. c. to [text struck through] EF. c. to Hs. BJ/Py3/D10.11.28. Re: Front Engine Guard. Proposal Sheet No. 24. Handwritten: X4616 [struck through] X1371- I attach… | ||
| Scan091 | Proposal letter for a new front engine guard design to address cracking issues. | ||
| View original record | Oy1S-E-103023 October 30, 1923. Mr. Claude Johnson, Rolls-Royce, Ltd., London, England. (Copy for attention of Mr.Royce " " " Mr.E.Platford " " " Mr.E.Hives) Dear Sir: Re: Proposal Sheet No.24 Front… | ||
| Scan092 | Complaints of mud and water penetrating the side engine guards on the 20-HP model. | ||
| View original record | BY. Hs. X1371 EP's Dept. EP. is absent Thn11/H9.12.26. [STAMPED: 9 JAN 1927] re. 20-HP. Side Engine Guards. We have had one or two complaints of mud and water penetrating through the side engine… | ||
| Scan093 | Letter from Melbourne complaining about mud ingress into the engine bay of New Phantom and 20 HP cars. | ||
| View original record | X1371 Pt.6/C/7/10/28 MELBOURNE. - 10th October, 1928 Whr/London c/Ha/Derby c/Ha/Derby c/Ef/Derby c/Ef/Derby Please note that I am getting rather frequent complaints from Rolls-Royce owners of New… | ||
| Scan094 | The effectiveness of Phantom engine guards in preventing mud ingress, comparing driving conditions in France and Australia. | ||
| View original record | Hs. X1371 BY7/G.12.11.28. PHANTOM ENGINE GUARDS. Referring to Pt6/EP.10.10.28. in which Pt. points out that the louvred engine guards permit of the easy ingress of mud, we understand him here to mean… | ||
| Scan095 | Performance of Phantom engine guards and potential improvements for different road conditions. | ||
| View original record | To BY. from Hs. X1371 Hsl/LG15.11.28. PHANTOM ENGINE GUARDS. X.1371 X.8290 In answer to BY7/G12.11.28. We consider the present engine guards on the Phantom quite satisfactory under the conditions here… | ||
| Scan096 | Modifications to the Peregrine engine side guards and a new sump design. | ||
| View original record | To Hs.} from E. By. } X1391 E.7/HP.18.11.32 Stamp: RECEIVED NOV re Peregrine Bottom Half and Side Guards. With regard to the side guards fitted on to No.3. Peregrine, we think these will require… | ||
| Scan097 | Design considerations for Peregrine Undersheets and proposing a trial set. | ||
| View original record | X1371 To BY. from E/JNR. c. Hs. Sft. RHC. E/JNR.1/HP.8.3.33. Peregrine Undersheets. We send you herewith: LeC.3392 - sheets 1, 2 and 3 showing the engine and the gearbox undersheets. In drawing these… | ||
| Scan098 | Modification to the Peregrine engine's undersheets. | ||
| View original record | X1371 To DY. from E. E.12/HP.3.5.33. c. Hs. re Peregrine Undersheets. -------------------- Referring to LeC.3392 in connection with the above, this requires that there shall be no cooling ribs on the… | ||
| Scan099 | Progress memo regarding design issues with the 3.5 litre Bentley, specifically the Undersheet. | ||
| View original record | X1371 To WOR. from E c. Hs. By. E.8/HP.3.5.33. 3 1/2 litre Bentley progress. ------------------------- We are in agreement with memo BY.1/G.2.5.33. As regards question of design, the only section we… | ||
| Scan100 | Sending the complete design for Bensport engine and gearbox undersheets and suggesting a trial set be made. | ||
| View original record | To BY. from E/JNR. c. Wor. Hs. RHC. X1371- Rm E/JNR.2/HP.4.5.33 re Bensport Undersheets. We send you herewith: LeC.3461 - sheets 1, 2 and 3 - complete design of the engine and gearbox undersheets. In… | ||
| Scan101 | Modifications and production of Bentley undershields for a test chassis. | ||
| View original record | To RHC. from E. c. Hs. Bv. X1381:- E.7/HP.22.6.33. Bentley Undershields. ------------------- We wish to confirm that the final Bentley chassis for the 10,000 miles test will have a set of… | ||
| Scan102 | Confirming a proposal to manufacture the Bentley Side Lever Guard in aluminium, with a modification to prevent material crushing. | ||
| View original record | X137! [handwritten] To RHC. from E. [RHC. is struck through] c. Hs. Bv. [Hs. and Bv. are struck through] E.4/HP.26.6.33. Bentley Side Lever Guard. ------------------------ This confirms that we… | ||
| Scan103 | Comparison of brake performance for Continental Touring versus standard use. | ||
| View original record | R.R. 238 (24 n) (PP. 583. 8.1.13) E.P. 3332. Include in the alpine experiences X11897 95 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 16/7/14 To Mr Wormald - Order No. Customer's No. Re your note… | ||
| Scan104 | Instructions regarding brake performance issues, including wheel lock-up and rubbing, observed during trials in Austria. | ||
| View original record | R.R. 238 (24 B) (PP. 383. 8.1.13) E.P. 3332. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To W. Wormald (cont'd) 16/7/14 19 Order No. Customer's No. advantages increase with the speed at which car is driven &… | ||
| Scan105 | Standardisation of oil retaining baffles in rear axle tubes to prevent leakage onto the rear brakes. | ||
| View original record | H.R. 755 (5 H) (S F. 621. 2-5-19) G. 2361. STANDARDISATION of CHASSIS PARTS. Description of Parts. Oil retaining baffles in rear axle tubes. Origin. To prevent oil from axle leaking on to the rear… | ||
| Scan106 | Distributing standardisation sheets for several experiments. | ||
| View original record | X.3532. To R. from Hs/AT. CJ. Bn. By. Da. EP. PN. Wor. Hs/AT27.5.20. X STANDARDISATION SHEETS. Herewith please receive completed sheets for the following experiments. - X.3350a. Modification to S.… | ||
| Scan107 | Standardisation of a modified lubrication system for rear brake actuating shafts. | ||
| View original record | RR 785 (10M) (8459. 24-10-30) 6/3185. COMPLETED 2.12.31. STANDARDISATION of CHASSIS PARTS. Date 8.10.31. X No. 1559 No. 5360 DWG LOP. No. G. 53594 Part List A Scrap and replace at all costs, including… | ||
| Scan108 | Form for the standardization of chassis parts, detailing the cost of jigs and tools. | ||
| View original record | STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted................. 101 in 'T' Date when chassis will be handed to… | ||
| Scan109 | Ergonomic positioning and dimensions of the side brake lever. | ||
| View original record | X3458 H/S. Sp. from BY. c. C. c. Mr. c. Hs. FC JUL 6 1921 BY14-P5. 7.21. RECEIVED. SIDE BRAKE LEVER. Referring to the above question, I assume from the information supplied to me that you are actually… | ||
| Scan110 | Sending the print G.2902 for the X.3458 rear hub and double brake. | ||
| View original record | R.R. 235 a(200 T) (S.F. 103, 25-10-18) G. 2244 Mr. Coverley. from EFC. EFC6/T19.5.19. X.3458 - REAR HUB AND DOUBLE BRAKE Herewith please receive print of G.2902. in connection with the above. EFC. | ||
| Scan111 | Telegram confirmation from Royce to Hives regarding an experiment on how to keep oil off brakes. | ||
| View original record | CONFIRMATION OF TELEGRAM. X.3480. 3532 ROYCAR DERBY. HIVES EXPERIMENT WHAT CAN BE DONE TO KEEP OIL OFF THE BRAKES AND WHAT IS THE BEST THING TO DO IF OIL DOES GET ON THE BRAKES+ ROYCE. | ||
| Scan112 | Potential for experimenting with front brakes and analyzing existing brake system performance. | ||
| View original record | X1559 To CJ. from R. c. to EAC. c. to BJ. c. to PN. c. to Wor. c. to Hs. X.3323 X.1559 R8/G4.8.21. RE - BRAKES (CJL/ES.8.21.) I am in receipt of your interesting memo, and thank you for the… | ||
| Scan113 | Tyre pressures, braking performance, and a comparison with other vehicle braking systems. | ||
| View original record | contd. -3- 4. Another reason is the use of the present resilient cord tyres definitely reduce the braking effort on bumpy roads unless we take the advantage of running these cord tyres at much lower… | ||
| Scan114 | Defects of a current brake system and considering the implementation of front wheel brakes. | ||
| View original record | contd. -4- it is quite bad for running backwards down hill, the system being definitely defective. I do not think it is worth while spending any money on a Hispano for this purpose. Our new Goshawk… | ||
| Scan115 | Front-wheel braking and the acquisition of competitor cars like Hispano, Ballot and Duesenberg for analysis. | ||
| View original record | Contd. -5- have a fair idea of the possibilities of other arrangements and front wheel braking. I think I should not choose a Hispano as a specimen of front wheel brakes, but should try and get hold… | ||
| Scan116 | From Mr. Royce detailing urgent torsion and fracture tests for the front axle system on the 40/50 HP chassis. | ||
| View original record | To Hs. from Da. X1559 Dal/G28.10.21. RE. FRONT WHEEL BRAKES ON 40/50 HP. CHASSIS. X.3488- X.3441 Mr. Royce wishes you to test the value of the present front axle system in torsion. He suggests that a… | ||
| Scan117 | Suitability of Perrot and Hotchkiss front wheel brake systems. | ||
| View original record | To CJ. from R. c. to BJ. c. to Hs. X1575 X1559 R3/G3.11.21. RE FRONT WHEEL BRAKES. X.4428 X.1575 I had suggested that to facilitate this matter Perrot might send us a Delage axle to rig up one of our… | ||
| Scan118 | Suitability of Perrot and Hotchkiss front wheel brake systems. | ||
| View original record | To C.J. from R. c. to BJ. c. to Hs. X1559 R3/G3.11.21. RE FRONT WHEEL BRAKES. X.4428 X.1575 X1559 I had suggested that to facilitate this matter Perrot might send us a Delage axle to rig up one of our… | ||
| Scan119 | Arguing that the importance of front wheel brakes has been over-estimated compared to other design priorities. | ||
| View original record | CJ. from R. c. to Wor. c. to Hs. c. to EP. c. to PN. X11535/9 R3/G9.11.21. X.4428 - RE FRONT WHEEL BRAKES. With reference to front wheel brakes, I think the relative importance of these compared with… | ||
| Scan120 | Delays with the application of front wheel brakes, the 'Swallow' project, and proposed schemes for a servo system. | ||
| View original record | To C.J. from R. c. to BJ. c. to LHS. c. to BY. c. to Wor. c. to Hs. c. to Messrs.Claremont Haynes & Co. X1559 X.4428 - RE. FRONT WHEEL BRAKES, AND DESIGN WORK ON "SWALLOW" ETC. X.4405 We have been… | ||
| Scan121 | Technical description of a proposed compressed air-assisted braking system. | ||
| View original record | contd:- -2- R12/G22.11.21. reservoir of about 500 cu.ins. This latter is quite a small and inexpensive affair. (3) Normally the front wheel brakes can be operated by the pedal direct (one equaliser)… | ||
| Scan122 | Servo drum and free wheel designs for a braking system, and progress on the 'Swallow' and 'Goshawk 11' chassis. | ||
| View original record | Contd. -3- R12/G22.1121. of the four brakes. (B2) To avoid this trouble I arranged that the servo drum should be driven from the chassis by two ratchet drives, so geared to run in opposite directions,… | ||
| Scan123 | Inter-office letter discussing the problems and reasons against implementing four-wheel brakes. | ||
| View original record | R. R. A. V5 25m. 12-20-20 40849 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC., SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oy4 - G 211221 December 21, 1921 Dear Hives: (D) Re: Four Wheel… | ||
| Scan124 | Letter arguing against certain brake designs, citing issues with Hotchkiss drive and steering in winter conditions. | ||
| View original record | A further argument is that it is well known that the brakes are defective on cars with Hotchkiss drive, because of the flexible control torsionally of the rear axle. Brakes on the front wheels, unless… | ||
| Scan125 | New arrangement for side change levers and a servo-assisted gearbox for front wheel brakes. | ||
| View original record | CONFIDENTIAL+ X.4488. X1559 BJ8/H14.12.22. To Hs. To BY. } from BJ. To OY. RE SIDE LEVERS. X.4428. X.3462. The following is a copy of a memorandum we have received from R., which he has requested… | ||
| Scan126 | Advising on the adoption of left-hand steering and four-wheel brakes for American cars. | ||
| View original record | Copy of R2/M7.12.22 - contd :- In the case of America, should they adopt left-hand steering on their new cars, which I strongly advise, then the central change obviously follows, so that cars we are… | ||
| Scan127 | Recent serious car accidents involving rival makes, particularly along the road to Nice. | ||
| View original record | Y/1559 COPY OF MEMORANDUM FROM H. (H3/EP9.3.23.) Re Rival Makes of Car. It will be of interest to R. to learn that there are a number of serious accidents every week along the road from here to Nice.… | ||
| Scan128 | Policy on front wheel brakes in response to a report from Mr. Hives. | ||
| View original record | To CJ. from R. c. RG. HS. X 1559 R2/M23.10.23. RE FRONT WHEEL BRAKES+ X.9940. X.1559. Referring to Mr. Hives' first report I do not think we need alter our policy because of this. It is more or less… | ||
| Scan129 | Front wheel brakes, discussing the cause of 'jaggers' and proposing modifications to the brake action, springs, and dampers. | ||
| View original record | To Hs. from R. RG. c. to CJ. X1559 R3/ME3.10.23. RE. FRONT WHEEL BRAKES. X.9940 X.1559 Referring to your 2 reports, and my 3 telegrams. You will notice that I have corrected 2 mistakes in my… | ||
| Scan130 | Improvements and concerns for vehicle braking and steering systems. | ||
| View original record | (2) BRAKES TO DEFINITELY WIND OFF. You will notice inmy 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… | ||
| Scan131 | Report by a motoring correspondent on speed and stopping distance tests for four-wheel brakes fitted to a Bentley car. | ||
| View original record | Nov. 1923. X.1559. FOUR WHEEL BRAKES - BENTLEY CAR. SPEED AND CIRCLE TESTS - (By the motoring correspondent) Today and tomorrow are popular days at the Motor Show at Olympia, the price of admission,… | ||
| Scan132 | Table comparing servo torque multiplication data for the 40/50, 20/25, and Peregrine models. | ||
| View original record | X 1589. 210 To Da. from Hs/Gry. Hs/Gry. 8/KT. 8.11.33. SERVO TORQUE MULTIPLICATION. 40/50 3.9 μ = .31 Cams 35º 20/25 2.3 μ = .31 Cams 45º Peregrine. 2.0 μ = .31 Cams 45º Hs/Gry. | ||
| Scan133 | Request for detailed braking specifications of an 8-cylinder Isotta-Fraschini car for comparison purposes. | ||
| View original record | To HS. from DA. X1559 DA2/M8.11.23. RE. ISOTTA-FRASCHINI X.4609 X.1559 Referring to your Hs4/LG5.11.23., re the 8-cyl. Isotta, the figures you give for the braking will be very interesting to us and… | ||
| Scan134 | Development and issues of a semi-servo brake system, particularly concerning stiff front springs and a proposed torque member solution. | ||
| View original record | To CJ. from R. c. to RG. Hs. c. to BJ. DA. X1559 R3/M21.11.23. RE. VISIT OF RG. AND HS. TO WW. ON 20TH. NOV. 1923. X.9940 X.2628 X.1559 X.4214. We spent the whole of yesterday on brakes. With the… | ||
| Scan135 | Proposed modifications for a four-wheel brake and suspension system. | ||
| View original record | To HS. from R. c. to CJ. DA. X1559 R1/M22.11.23. FOUR WHEEL BRAKES - 40/50 ETC. X.1559 X.9940 FRONT SPRINGS. It is a decided advantage to increase the length of the road springs from 42" to 45" and it… | ||
| Scan136 | How to measure pull to identify unnecessary friction in the four-wheel brake mechanism. | ||
| View original record | X.1559 To HS. from DA. DA1/M27.11.23. RE. FOUR WHEEL BRAKES. X.1559. X.9940. 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… | ||
| Scan137 | Proposal for experimental alterations to the four-wheel braking system. | ||
| View original record | To HS. from R. c. to CJ. BJ. c. to RG. DA. c. to PM. X1559 RL/M27.11.23. RE. FOUR WHEEL BRAKES. X.1559 X.9940 We are proposing experimentally to try the following alterations - The ratio of the… | ||
| Scan138 | Modifications to the braking system, specifically regarding 'servo' action and shoe design. | ||
| View original record | contd:- -2- 126 suitable leverage to give practical working, because if still unsatisfactory we should have to self 'servo' it forwards. We suggest we twist round the shoe and put a 6" lever on, and… | ||
| Scan139 | Brake performance testing parameters and proposed shoe designs. | ||
| View original record | To HS. from R. c. to CJ. BJ. c. to RG. DA. c. to PN. X1559 R1/M28.11.23. RE. BRAKES. X.1559 X.9940 In your test of the value of brakes will you always, whenever possible, let us know the distance and… | ||
| Scan140 | From DA to HS about the delay in four-wheel brake designs pending experimental results. | ||
| View original record | To HS, from DA. X1559 DA2/M1.12.23. FOUR WHEEL BRAKES. X.1559 X.9940 Several designs are standing still for information as to the best leverages. For instance the epicyclic pressure dis-tributing gear… | ||
| Scan141 | Scheme for taking up clearance in rear brakes by rotating the servo with foot pressure. | ||
| View original record | R.R. 403A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs/ACL1/LG3_1. 24. DA. from Hs/ACL. RE. SCHEME FOR TAKING UP CLEARANCE IN REAR BRAKES BY MEANS OF ROTATING THE SERVO… | ||
| Scan142 | Braking systems, detailing issues with pedal pressure and proposing an alternative servo scheme. | ||
| View original record | -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/ACL1/LG3.1.24. necessary to use higher pedal pressures to obtain same braking effort. (2) The angularity of the pull rod operating the servo would have… | ||
| Scan143 | Servo efficiency and brake pressure modifications to achieve more equal braking. | ||
| View original record | R.R. 403A (40 H) (EL 42 12-7-23). J.H., D. SERVO EFFICIENCY JAGGERS EXPERIMENTAL REPORT. Expl. No. 1559 9940 9910 REF:Hs4/LG11.1.24. To R. from Hs. c. to CJ. RG. c. to DA. BY. c. to E. BRAKES. As the… | ||
| Scan144 | The causes and elimination of brake jaggers. | ||
| View original record | R.R. 493A (40 H) (EL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: HS4/4/C1L.1.24. This week we have received from DA. a scheme for reducing the power of the servo by increasing… | ||
| Scan145 | Modifications and tests to diagnose braking and steering issues, specifically 'jaggers'. | ||
| View original record | R.R. 495A (40 H) (SL 42 12-7-23). J.H.D. -3- EXPERIMENTAL REPORT. Expt. No. 9940 REF:hsd/LG11 1 24. brake pedal to prevent the sudden application. The following experiments have been tried and the… | ||
| Scan146 | Front brake effectiveness, steering faults, and brake rig testing. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.,D. -4- EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs4/LG11.1.24. the front brake is most effective, the car steers in that direction. On the cars we are running at… | ||
| Scan147 | Issues with steering pivot pins and riveted brake dust covers, and plans for testing a car with new front springs and servo. | ||
| View original record | R.R. 403A (40 H) (EL 42 12-7-23). J.H., D. -5- EXPERIMENTAL REPORT. Expl. No. 9940 REF HS4/LG11.1.24. This is a point which we are investigating. CONSTRUCTION. We find difficulty in preventing the… | ||
| Scan148 | Diagram showing the arrangement of Hispano four-wheel brakes. | ||
| View original record | ARRANGEMENT OF HISPANO FOUR WHEEL BRAKES. REAR BRAKE 2.67 2.73 3.525 4.305 4.76 DISTRIBUTING SHAFT. NO COMPENSATING GEAR BETWEEN FRONT & REAR BRAKES. COMPENSATING GEAR BETWEEN NEAR & OFF SIDE FRONT… | ||
| Scan149 | Schematic diagram of the standard arrangement for four-wheel brakes on a 40-50 model, including modifications. | ||
| View original record | 40-50 FOUR WHEEL BRAKES. STANDARD ARRANGEMENT. (SHEET 1). DIFFERENTIAL / DISTRIBUTER { S/7 TORQUE TO FRONT { 2/7 " TO SERVO. IN THE MODIFIED ARRANGEMENT THE LEVERS A, B, C & D, HAVE BEEN ALTERED AS… | ||
| Scan150 | Calculation of the effective pressure on the rear brakes for the Standard 40-50 RR and Goshawk models. | ||
| View original record | PRESS. ON REAR BRAKES OF STD 40-50 RR. [Diagram values]: P, 14.75, 6.18, 1.4, 1.9, 2.0, 2.5, 7", .5 CAM RAD. EFFECTIVE PRESS. AT SHOES = (P 14.75 x 1.4 x 2 x 7 x 1 x .2) / (6.187 x 1.9 x 2.5 x 1 x 2 x… | ||
| Scan151 | Comparing the performance of different brake lining materials, specifically Halo and Ferodo, under hot and cold conditions. | ||
| View original record | R.R. 403A (40 H) (SL 43 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4388 /3409 REF: Hs5/LG15.1.24. To R. from Hs. c. to RG. CJ. c. to DA. E. c. to BY. BRAKES. BRAKE LININGS. With reference to… | ||
| Scan152 | Experimental progress report on a 40/50 car's 4-wheel brakes during a road test. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs. (Le Canadel) c. to CJ. RG. c. to DA. E. c. to BY. Expl. No. 9940 1559 REF: Hs4/LG17.1.24. SECRET. BRAKES+ PROGRESS REPORT… | ||
| Scan153 | Front brake effectiveness, oil contamination, servo modifications, and chunking in the brake mechanism. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LGM.7.1.24. running it was noticed that the N.S. front brake was much more affective and the steering ran off… | ||
| Scan154 | Customer complaints regarding brake noise and analysis of a proposed servo modification. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.,D. -3- EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs4/LG17.1.24. it has been complained of by everyone who has tried these brakes. There is also a chunk when the… | ||
| Scan155 | Tests on brake pressure distribution, servo operation, and the effects of unequal braking. | ||
| View original record | R.R. 492A (40 M) (SL 42 12-7-23). J.H., D. -4- Expl. No. 9940 REF: H24/L.G.17.1.24 EXPERIMENTAL REPORT. The pressure on each front shoe with standard arrgt. is approx. 11 X pedal pressure. We should… | ||
| Scan156 | The effect of front braking on steering for a 40/50 chassis. | ||
| View original record | R.R. 403A (40 H) (SL 12 12-7-23). J.H., D. -5- Expl. No. 9940 REF: Hs4/LG17.1.24. EXPERIMENTAL REPORT. front braking the steering is affected in the same manner as on our 40/50 chassis. Da. has… | ||
| Scan157 | Visit to Chapel-en-le-Frith concerning brake friction materials and squeaking linings. | ||
| View original record | R.R. 405A (40 H) (SL 42 12-7-23). J.H.,D. EXPERIMENTAL REPORT. Expl. No. 3409 REF: Hs/Rm/LC17.T. 24. VISIT TO CHAPEL-EN-LE-FRITH. (1) We interrogated Mr. Field as to the possibility of their producing… | ||
| Scan158 | Clutch wear and the friction co-efficient of Ferodo lining. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. REF: Hs/Rm/LG17.1.24. dust on the surface caused by wear, being unable to get away. They did not demonstrate this to us,… | ||
| Scan159 | Continued note on servo lining wear, attributing excessive wear to lack of cooling facilities. | ||
| View original record | contd:- -2- From these figures it is apparent that were the servo operating under the same conditions as the rear brakes, it should wear no more rapidly. Our tests on the brake rig have shewn,… | ||
| Scan160 | Diagram of an E.A.C. Servo with three graphs showing its mechanical gain performance under varying conditions. | ||
| View original record | E.A.C. SERVO Diagram Text: TANGENTIAL PULL P MECH GAIN P/W LOAD W Graph A: Title: VARIATION IN MECH GAIN WITH TEMPERATURE X-Axis: TIME RUN. MINS. Y-Axis: MECHANICAL GAIN Conditions: W = 10.5 LBS, DRUM… | ||
| Scan161 | Tests investigating unequal braking, its effect on steering, and the equalization of braking force. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. X1559 EXPERIMENTAL REPORT. Expl. No. 9940 1559 REF: Hs./ACRR.1.Bs. To R. from Hs. (Le Canadel) c. to CJ. DA. c. to E. BY. c. to WGR. S E C R E T. BRAKES.… | ||
| Scan162 | Servo brake testing, comparing the wear on Ferodo and cast iron liners. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ EH WOR By E. Da EP. PN. OV. RS Expl. No. 3409 9940 9910 REF.Hs5/LG23.1.24 OBJECT OF TEST. To obtain data on servo… | ||
| Scan163 | Testing E.A.C. servo brake shoes lined with cast iron. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. 9910 Expl. No. 9910 REF: Hs/Rm/LG24.1.24. E.A.C. SERVO. We have tested servo brake shoes lined with cast iron on our testing rig. The… | ||
| Scan164 | Brakes road test, detailing issues with servo liner wear and friction. | ||
| View original record | H.R. 493A (40 H) (SL 42 19-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs4/LG25.1.24. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. S E C R E T. BRAKES - ROAD TEST. We have now… | ||
| Scan165 | Brake performance and wear, comparing 4-wheel braking to 2-wheel systems under severe road conditions. | ||
| View original record | R.R. 403A (60 H) (BL 42 12-7-23). J.H.,D. EXPERIMENTAL REPORT. Expl. No. 9940 REF HS4/LG25.1.24. over the same road as the RR. - by the same drivers - under the same conditions, to see how long the… | ||
| Scan166 | Using cast iron to achieve a consistent servo brake and equal braking. | ||
| View original record | contd:- -3- anything else. If the cast iron will give us a consistent servo brake, then we shall have made considerable progress as regards equal braking. Hs. | ||
| Scan167 | Test rig results for servo performance with Ferodo and cast iron liners. | ||
| View original record | R.R. 403A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 9910 REF:Hs/Rm1/KG26.1.24. X3409 X9910' SECRET. E.A.C. SERVO. To R. from Hs/Rm. c. to CJ. RG. c. to DA. E. c. to EY.… | ||
| Scan168 | Comparing brake performance with modified and standard leverages. | ||
| View original record | R.R. 402A (40 H) (SL 42 12-7-23). J.H., D. 'EXPERIMENTAL REPORT. Expl. No. 9910 REF Hs/Rm/LG26.1.24. 17 lbs.ft. at 500 drum r.p.m. without over-heating. LATEST MODIFIED LEVERAGE. (Instructions… | ||
| Scan169 | Letter from France discussing the development of slow speed servo brakes, conversion parts for the 40/50 model, and observations on competing designs. | ||
| View original record | To C.J. from R. c. to RG. E. DA. Hs. PN. BJ. BY. Wor. X1559 La Villa Mimosa, Le Canadel, Var., France. Jan. 27th. 1924. X.1559. X.9770 X.9940. I am writing this to you to save postal time, and that… | ||
| Scan170 | Investigating the cause and cure for brake 'jaggers'. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from HS. c. to CJ. RG. c. to DA. E. c. to BY. WOR. Expl. No. 9940 REF: HS3/LG28.1.24. S E C R E T. BRAKE JAGGERS. After we had run… | ||
| Scan171 | Calculation comparing the unit pressure on the RR. servo shoes to the Hispano servo. | ||
| View original record | contd:- -2- Calculations show that the unit pressure on the RR. servo shoes is approximately 1/5 times the unit pressure on the Hispano servo. Hs. | ||
| Scan172 | The suggested cause for the chattering of front brakes, including a force diagram. | ||
| View original record | R.R. 485A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 9940 REF. Hs/ACL/LG25.1.24 SUGGESTED CAUSE FOR CHATTERING OF FRONT BRAKES. [Diagram showing a brake drum with forces P, R, F, a… | ||
| Scan173 | Page detailing the periodic action of spring and friction forces, likely within a braking system. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF:Hs/ACL/LG25.1.24. of the spring becomes greater than the frictional force between the drum and the shoes. Slip… | ||
| Scan174 | 40/50 HP car brake testing with cast iron liners and comparison with the Hispano servo. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. Expl. No. 9910 REF: HS6/LG30.1.24. SECRET. BRAKES. We have run a 40/50 HP. car… | ||
| Scan175 | Comparing the performance of Rolls-Royce and Hispano-Suiza cars. | ||
| 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. X9910, 9915, 4214, 438 REF. He2/LGS.2.24. OBJECT OF TEST. Comparison… | ||
| Scan176 | Braking tests conducted in North Devon. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Ha/3a/LGS.2 24. BRAKING TESTS - NORTH DEVON. Porlock hill - Length 2 1/4 miles. average grade 1 in 9 1/4. steepest 1 in 4… | ||
| Scan177 | The hill-climbing performance of a 40/50 HP car in North Devon. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF:Hs/Rs/LGS. 2. 24. HILL CLIMBING PERFORMANCE - NORTH DEVON. The following hills were climbed by a 40/50 HP. Landaulette,… | ||
| Scan178 | Hill climbing test results comparing a 40/50 HP chassis against a Hispano Suiza in North Devon. | ||
| View original record | HILL CLIMBING TESTS - NORTH DEVON. 40/50 HP. AND HISPANO SUIZA. Chassis specification. DETAIL | 40/50 HP. | HISPANO SUIZA --- Turning circles. | R.H. 58½ ft. L.H. 59 ft. | R.H. 49 ft. L.H. 49 ft.… | ||
| Scan179 | Comparison of brake tests conducted in North Devon between the R.A.C. High Speed Servo and Hispano systems. | ||
| View original record | BRAKE TESTS - NORTH DEVON. R.A.C. HIGH SPEED SERVE AND HISPANO SYSTEM COMPARED. Gradients up to 1 in 4 measured with gradieometer. Steeper - local intelligence obtained. OBSERVATION. Forward braking.… | ||
| Scan180 | Slow-speed brake servo for a 40/50 car. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL Expl. No. [crossed out] x9910 REF: Hs13/LG7.2.24. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to DA. BY. c. to E. WO R. SECRET. BRAKES. We… | ||
| Scan181 | Modifications to the brakes, specifically the low speed servo and pedal pressure issues. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. x9910 4214 REF: Hs./LG11.8.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to EY. WOR. SECRET. BRAKES. We have had… | ||
| Scan182 | The performance and wear characteristics of jointed brake shoes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hm/Bm/L.G.15.2.24. JOINTED SHOES. We have carried out a number of tests of the jointed shoes on our brake testing rig.… | ||
| Scan183 | Drawing illustrating wear on a wrapping shoe after testing. | ||
| View original record | WEAR ON WRAPPING SHOE AFTER ABSORBING 21 H.P. hrs. AT 300 R.P.M. WORST WEAR HERE. .018" .005" .007" .003" | ||
| Scan184 | The wear and efficiency of jointed brake shoes. | ||
| View original record | R.R. 493A (40 H) (BL 42 12-7-23). J.H.,D. EXPERIMENTAL REPORT. Expl. No. REF:Hs/Rm/LG15.2.24. See X9940 for sketch As the w inequality of wear on the non-wrapping shoe was very much worse than this,… | ||
| Scan185 | The co-efficient of static friction for Ferodo brake shoes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/Aut/Lg19:2.24. To R. from Hs/Rn. c. to CJ. RG. c. to E. DA. c. to BY. WOR. S E C R E T. CO-EFFICIENT OF STATIC… | ||
| Scan186 | Testing different brake servo friction materials and investigating pressure loss issues. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL. Expl. No. 9940 3407 REF: Hs9/LG22.2.24. To R. from Hs. c. to CJ. RG. c. to DA. H. c. to BY. W.O.R. SECRET. BRAKES. -------- It… | ||
| Scan187 | Suggested improvements for the front brakes on the 40/50 HP car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hsl/1/G23.2.24. SECRET BRAKES. To R. from Hs. c. to C.J. RG. c. to DA. E. c. to EY. NOR. We have now had… | ||
| Scan188 | Issues with brake pivot nuts, carrier bolts, lubricator accessibility, and protection from mud and water. | ||
| View original record | S.S. 495A (40 H) (EL 42 12-7-23). J.H. D. -2- EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hm1/LGS.2.24. (4) On the pivot which carries the steering lever, two of the nuts which hold the brake on to the… | ||
| Scan189 | Recommendation to increase the Brinell hardness of 40/50 HP rear brake drums due to issues with wear and scoring. | ||
| View original record | BY. from Hs. K3458 Φ Hsl/LG2.6.24. 40/50 HP. REAR BRAKE DRUMS. 43458 X9360 As we have pointed out previously, on cars fitted with 4-wheel brakes, we get trouble with the rear brake drums wearing and… | ||
| Scan190 | Reduced ride comfort caused by fitting stiffer front springs. | ||
| View original record | R.R. 403A (40 H) (SL 12 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 2628 / 4261 ✓ REF: Hs3/1027.2.31. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. RIDE COMFORT - REDUCED BY… | ||
| Scan191 | Statement about the unacceptable impact on ride comfort caused by the addition of front brakes. | ||
| View original record | contd: -2- of the front axle. It will not be accepted by customers that the addition of front brakes should make the car ride less comfortably. Hs. | ||
| Scan192 | Secret memo discussing lag and sticking issues in an E.A.C. servo mechanism, comparing it to a Renault scheme. | ||
| View original record | To R. from DA. c. to HS. SECRET. X1557 144 DA2/M7.4.24. E.A.C. SERVO. X9910 X.9948 X.1559 X.1013. Referring to Mr. Hives' report on the servo of the agreed scheme - HS5/LG4424 - we suggest that the… | ||
| Scan193 | Comparative analysis of the braking systems of Sunbeam and Bentley vehicles. | ||
| View original record | W/S. PN. from Hs. Handwritten: X1559, X246, X1559 Hs3/LG17.6.24. Referring to your FN8/DN13.6.24. We think it is quite possible for the Sunbeam Brakes to be adjusted so that they can lock all four… | ||
| Scan194 | Technical memorandum discussing cam leverage in four-wheel brake systems. | ||
| View original record | To Hs. from Da. X1559 Da2/M10.10.24. FOUR WHEEL BRAKES. X.9940 X.1559 X.4214. Replying to your Hs3/LG7.10.24., the statement referred to is sufficiently true when compared with square cams and similar… | ||
| Scan195 | Requesting to forward an enclosed letter about four-wheel brakes to Monsieur Henri Perrot. | ||
| View original record | To Ps. from Hs/Rm. X1559 Hs/Rml/LG27.11.24. FOUR WHEEL BRAKES. I am trying to get some information in connection with 4-wheel brakes and have written the enclosed letter to Monsieur Henri Perrot. I do… | ||
| Scan196 | Brake deceleration and efficiency tests on a 'Vermorel' car. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/Rml/LG23.3.25. On the 'Vermorel' on the other hand, the distances to rest give the following decelerations :- 10 m.p.h.… | ||
| Scan197 | Test of a Ferodo strip, as used on Morris Cowley cars, to reduce brake squeaks. | ||
| View original record | 168 To DA. from Hs. Y3458 Hs3/LG22. 4. 25. BRAKE SQUEAKS. X̶3̶4̶5̶8̶ X4257 X.8360 We have tried a strip of Ferodo as you mention was being used on Morris Cowley cars. We find that it does undoubtedly… | ||
| Scan198 | Four-wheel braking and car control, discussing front axle rigidity and steering effects. | ||
| View original record | R.R. 433a (50 HD) (P.D. 31. 12-8-25) J.H.D. K1559 EXPERIMENTAL REPORT. Expl. No. REF: HsRm1/LG7.9.25. To DA. from Hs/Rm. FOUR WHEEL BRAKING AND CAR CONTROL. From our experience the rigidity of the… | ||
| Scan199 | Calculations and experimental results for steering moments and the effect of single-wheel braking. | ||
| View original record | R.R. 493a (50 H) (E.D. 31. 12-6-25) .H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: HE/Hul/L67.9.25. Suppose the car is to be trying to turn about O as the rear wheels cannot skid sideways. Then taking… | ||
| Scan200 | Analysis of steering behavior and axle torsion when a single front brake is applied. | ||
| View original record | H.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF Hs/Rm/LG7.9.25. It is therefore necessary to assign some other reason for the steering taking charge when one front… | ||
| Scan201 | Responding to General Motors' request for information regarding a front wheel brake design, referencing an Oldsmobile blueprint. | ||
| View original record | S/W. Hs. X/1559 CWB6/GM/8.11.37. I have been asked by Mr. Constantine on behalf of General Motors, whether we can give them any information regarding the anticipation by us of the method of operating… | ||
| Scan202 | Front axle with brake, returning a drawing and part while noting design differences. | ||
| View original record | X1559 CWB. from Hs. Hs1/LG9.11.27. FRONT AXLE WITH BRAKE. We are returning to you herewith drawing and piece in connection with the above. We have never used a brake operation as shewn on the drg.,… | ||
| Scan203 | Cause of 'brake thumps' and proposing the experimental use of an oil dashpot. | ||
| View original record | HS. BY. } FROM R. E. } X 1559 R5M20.8.32. C. to SG. WOR. DA. BRAKE THUMPS. One very much likes to get at the exact reasons for any of these objectionable phenomena. There are good reasons to concluded… | ||
| Scan204 | Description of a semi-hydraulic brake system proposed for patent purposes. | ||
| View original record | X1559 BY. FROM R. C. to SG. WOR. HS. DA. R1/M5.10.32. X.728 X.1559 SEMI-HYDRAULIC BRAKE SYSTEM FOR MOTOR CARS ETC. We attach herewith sketches of the above system for patent purposes. This scheme has… | ||
| Scan205 | Outlining a different scheme for hydraulically operated brakes. | ||
| View original record | X1559 DA. } FROM R. RI/M27.10.32. HS. } BY. } C. to SG. WOR. PN. E. HDY. HYDRAULICALLY OPERATED BRAKES ETC. Since writing my last memo, and learning that some of our ideas have been anticipated more… | ||
| Scan206 | Diagrams and patentable features for a hydraulic brake operation system. | ||
| View original record | X1559 BY. FROM DA. DA5/M16.11.32. C. to SG. WOR. HS. E. HYDRAULIC BRAKE OPERATION. Herewith we send N. sch.s 3585/6. These are diagrams shewing some further ideas in connection with the hydraulic… | ||
| Scan207 | Investigating a vacuum servo diagram for brake operation with a view to patenting. | ||
| View original record | BY. FROM DA. X1559 DA6/M16.11.32. C. to SG. WOR. HS. E. BRAKE OPERATION. We send herewith N. sch. 3600. a diagram of a method of arranging a vacuum servo which R. wishes you to investigate with a view… | ||
| Scan208 | Alternative method for an actuating cylinder with automatic adjustment for hydraulic brakes. | ||
| View original record | X1659 BY. FROM DA. C. to SG. WOR. HS. E. DA8/M16.11.32. HYDRAULIC BRAKE OPERATION. Herewith we send N. sch. 3603 snewing an alternative method of arranging the actuating cylinder with an automatic… | ||
| Scan209 | On the hydraulic operation of brakes, concerning a separate valve for replenishment and temperature-related expansion. | ||
| View original record | X1569 BY. FROM DA. DA1/M17.11.32. C. to SG. WOR. HS. E. & HYDRAULIC OPERATION OF BRAKES. Herewith is N.sch. 3605. shewing the idea of using a separate valve for replenishment, and for relief in the… | ||
| Scan210 | Brake layouts, front-to-rear braking ratios, and experiments on chassis J.III. | ||
| View original record | X1559 E. From Hs/Gry. c. to Da. c. to By. Hs/Gry.2/MA.12.4.33. BRAKES. We send you herewith details of the brake layouts on all chassis together with the ratio of front to rear braking. These are the… | ||
| Scan211 | Series of diagrams and graphs analyzing brake system layouts and performance for various models. | ||
| View original record | Chart 1 (Top Left): Brake linkage layout diagrams for models: P.II, 20/25, F.IIE, Phantom II, Scripture, with various numeric measurements. Chart 2 (Top Middle): EXPERIMENT BRAKES, LAYOUT TO… | ||
| Scan212 | Modification scheme to the axle control (Hs.1043) to fix 'brake jaggers' on the 1.J.3. chassis. | ||
| View original record | X1539. To RHC. from Hs/Gry. Hs/Gry.7/KT.19.6.33. BRAKE JAGGERS. We send you herewith a scheme Hs.1043 of a modification to the axle control with which we hope to overcome brake jaggers. The spring… | ||
| Scan213 | Blueprint for a modified axle control component, detailing spring specifications. | ||
| View original record | Hs 1043, NORMAL SPRING OMITTED, EXISTING PARTS, .075, 1.808, SPRING COMPRESSED .025, ADJUSTMENT SHIMS, SPRING F79190, SQUARE CORNER, DIA OF WIRE .160, OUTSIDE DIA OF HELIX .440, 10 WORKING COILS, FREE… | ||
| Scan214 | On tests investigating brake thumps on a 2.E.TV. chassis, concluding the oil dashpot was ineffective. | ||
| View original record | X/584. 198 To E. from Hs/Gry. c. to Wor. c. to Da. c. to Ey. Hs/Gry.9/KT.4.7.33. BRAKE THUMPS. We have carried out tests on 2,E.TV. chassis on the vertical oil dashpot to N.Sch.3769. For the tests the… | ||
| Scan215 | Undesirable weight increase due to switching from aluminium to steel brake shoes on a Bentley. | ||
| View original record | X/5159. 194 Da. From Hs/Rm. c. to E. c. to By. Hs/Rm.4/MA.25.8.33. Attached is a table showing the increase in weight due to the steel brake shoes. In spite of the fact that the steel shoes have been… | ||
| Scan216 | Design choice between forged steel and welded sheet metal for brake shoes. | ||
| View original record | X1559. To Hs/Rm. from Da. Da.1/HP.28.8.33. c. E. B. Steel Brake Shoes. Replying to your Hs/Rm.4/MA.25.8.33, we have been inclined to favour forged steel shoes as being the simplest form, but it… | ||
| Scan217 | Proposing a test to determine if aluminium brake shoes permanently increase in size when heated. | ||
| View original record | X1559 19 To H1. from Hs/Gry. " RHC. Ha/Gry.&/KT. 27.9.33. ALUMINIUM BRAKE SHOES. We want to find out whether aluminium brake shoes grow when heated. It has been suggested that this is the cause of… | ||
| Scan218 | Blueprint showing the arrangement of a spring balance for servo tests. | ||
| View original record | ARRGT. OF BALANCE EX. 9690 Ex. 9695 BUSH Ex. 9693 CAP Ex. 9682 SPRING THRUST PIECE. Ex. 9692 BODY. Ex. 9691 ROLLS-ROYCE, LTD PRINT ROOM 13 OCT 1933 DERBY EX. 9690 SPRING BALANCE. SERVO TESTS. Hs 721 | ||
| Scan219 | Recommended cures for inefficient brakes, focusing on oil contamination of the servo and experiments with new linings. | ||
| View original record | 360 Wor. from Hs/Gry. c.c. E. c.c. Ev. Da. c.c. HHy. X1559. Hs/Gry.10/KT.12.10.35. INEFFICIENT BRAKES. X4117. We attach a report of our recommended cure for complaints of inefficient brakes. Oil on… | ||
| Scan220 | Technical memo detailing a method for testing inefficient brakes by measuring servo output with spring balances. | ||
| View original record | 261 To W.Or. from Ha/Gry. C. E. C. D. C. Da. BY. C. Hdy. Ha. C. Br. EP. C. Mx. Ha/Gry.11/KT.12.10.33. INEFFICIENT BRAKES. In most cases of complaints of inefficient brakes the servo is at fault, and… | ||
| Scan221 | Table of input and output figures for efficient servos on various chassis models. | ||
| View original record | 252 -2- Hs/Srv.11/KT.12.10.33. Table of Outputs for efficient servos. CHASSIS. INPUT. OUTPUT. Bensport. 300 lbs. 380 lbs. 20/25 300 lbs. 360 lbs. 40/50. 250 lbs. 500 lbs. ------------------ Hs/Gry. | ||
| Scan222 | Front brake clearances and adjustments, comparing the current system to the Bentley layout for the 20/25 model. | ||
| View original record | X15359 26 To Wor. from Hs/Gry. C. E. C. Hy. C. Ry. Da. C. Hly. Hs/Gry.1/KT.19.10.33. X1360 BRAKES. We have fitted to 19.G.IV. the increased front braking now standardised on the 20/25. During the… | ||
| Scan223 | The distortion of aluminium brake shoes after two stages of heat treatment. | ||
| View original record | To Hs/Gry. from RHC. Handwritten notes: X1559, GRY, See me, HS, 87 ALUMINIUM BRAKE SHOES After taking accurate measurements of the principle dimensions, a Phantom brake shoe G.79090 was handed to Hl.… | ||
| Scan224 | Tests on brake straps to reduce seizures by heat-treating the shoe castings. | ||
| View original record | X15579. 268 To Wor. from Hs/Rn. c. E. By. c. Mx. Hd. Hs/Rn.1/KT. 27.10.33. QUARTERLY COMPLAINTS. Referring to the last conference held on quarterly complaints, we have now carried out tests on the… | ||
| Scan225 | Experiments conducted to resolve 'brake thumps' by modifying the braking system. | ||
| View original record | x1559 209 To Sg. From Hs/Gry. c. Wor. E. c. Da. By. Hs/Gry.14/KT.7.11.33. x254 BRAKE THUMPS. We have carried out several experiments on 2.B.IV. with the front brake dashpot N.Sch. 3804. connected… | ||