Rolls-Royce Archives
| Identifier | Entry | ||
| img001 | Comparing the engine cooling performance between the Hispano and the 40/50 HP models. | ||
| View original record | R.R. 49SA (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/R m/LG25.11.24. HISPANO AND 40/50 HP. R-R COOLING. 20 M.P.H. The 40/50 HP. is not so well cooled as the Hispano at 30… | ||
| img002 | Road-based cooling tests comparing the 40/50 HP model with a Hispano model. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-8-24) J.E.D. To R COOLING TESTS (ROAD) EXPERIMENTAL REPORT -5- Expl. No. REF: Hs/Rm/LG25.11.24. 40/50 is enormously dependent upon its Fan. When the RR. fan is removed,… | ||
| img003 | Recommendations for addressing engine overheating and managing customer complaints about water boiling. | ||
| View original record | To R from H.S. C. to C.J. B.J. C. to M. B.M. C. to W.G.T. V Hsl/LG10.12.24. COOLING INVESTIGATIONS. X766 48250 Attached herewith is a memo. from E.J. We consider this is a matter you would like to… | ||
| img004 | Engine water circulation, radiator performance, and shutter arrangements. | ||
| View original record | contd :- -2- when the engine stops, the water circulation is stopped and owing to local heating under these conditions, more water will be lost than if the engine is kept running. We have run a 40/50… | ||
| img005 | Secret memorandum requesting conclusions from a cooling investigation report to address car overheating issues. | ||
| View original record | X766 SECRET. To Hs. from BJ. Copy to By. BJ16/H9.12.24. COOLING INVESTIGATIONS. Experimental Report, Hs7/LG28.11.24. We are extremely interested in your very thorough investigations on this subject… | ||
| img006 | Need for under-dashboard ventilation in the 'Sluggard type' car due to excessive heat. | ||
| View original record | [Handwritten top left:] Mr. Wormald. [Handwritten top right:] Refer to Jim Bullamore Letter from Le Canadel [Typed:] CJ27/B27212. [STAMP: W.M. MAR 1912 RECEIVED] [Typed:] Technical Committee. Please… | ||
| img007 | Letter discussing helical timing gears, plate clutches, and the progress of experiments. | ||
| View original record | Ref POST WAR ENGINE VIBRATIONS P/C 60/50 C O P Y. Le Canadel. 18th April 1912 Mr Claude Johnson from F.H.R. With reference to helical timing gears, I am pleased to see that these are considered to be… | ||
| img008 | Engine heating issues, flywheel drop forging, and friction-damped spring couplings. | ||
| View original record | Handwritten notes at top: 7SHAS, EVMT FHD124H, lmp 2/(2), 9 mmy, 950 Very faint text at top right: H.R 11/4/200(HD11) 2.S 123' 9(EL15) 9 82 Typed text: of the water in the radiator is greater with… | ||
| img009 | Graph of HP (Horsepower) versus Fan Speed (RPM) for two different fan configurations. | ||
| View original record | U1 H.P.-FAN SPEED CURVES OF VARIOUS FANS. 1. STD. 4% 6 BLADE FAN. 2. STD. 4% FAN WITH 3 BLADES REMOVED. H.P. 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 R.P.M. 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200… | ||
| img010 | Graph plotting thrust curves against fan speed for seven different engine fan configurations and a ventilator fan. | ||
| View original record | THRUST-FAN SPEED CURVES OF VARIOUS FANS (SET B) 1. STD 40/50 6 BLADE FAN (22" DIA) 2. STD 40/50 FAN WITH 3 BLADES REMOVED. 3. E.A.C. 4 BLADED FAN. (23" DIA) 4. HISPANO-SUIZA FAN. (17 1/2" DIA) 5. HIGH… | ||
| img011 | Bench experiments and thrust tests conducted on various radiator fans. | ||
| View original record | To R. & E. from EFC. c. CJ. & PN. c. EY. EP. Mx. c. Wor. RG. Da. c. Hs. EFC2/T19.11.24. X.1017. BENCH EXPERIMENTS ON VARIOUS RADIATOR FANS. X3438 Thrust of fan at various speeds. Further to our… | ||
| img012 | Letter discussing design improvements for the fan of a 40-50 HP chassis. | ||
| View original record | COPY. OGILVIE & PARTNERS, LTD. 104, High Holborn, London W.C.1. 19th September, 1924. A.J. Rowledge, Esq., Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Rowledge, I have considered the fan… | ||
| img013 | Analysis of the rate of increase of power with speed for a fan, exploring options like variable pitch propellers and blade twist to manage power absorption. | ||
| View original record | [Handwritten, top left, mirrored: STATE OFFICE COPY] [Handwritten, top right: 29 (EAC) 19, FAN, TESTS] -2- Contd. (2) Rate of increase of power with speed. The speed of the car and the speed of the… | ||
| img014 | Need to change piston rings and the method of pinning them. | ||
| View original record | To BY. from R. c. to J c. to EH. ORIGINAL Re Piston Rings. X.2749 I do not consider there is any need to change piston rings through the gap getting slightly wide, providing they are pinned from… | ||
| img015 | Requesting an experimental run with piston rings featuring a wide gap and alternative pinning arrangements. | ||
| View original record | To EH. from R. c. to J. [crossed out] c. to By. [crossed out] ORIGINAL. R6/B9:6:17. 2 X.3076 Re Piston Rings. Will you please make an experimental run with piston rings so worn or arranged that the… | ||
| img016 | Request for a complete Remy ignition set for Mr. Royce's examination and discussion on fitting it to aeroplane engines. | ||
| View original record | To EH. from Oy. c. to By. ORIGINAL (stamp) D (stamp) 4 (handwritten) Oy2/B12:6:17 13 JUN 1917 (stamp) REC'd (stamp) X.2814 (handwritten and crossed out) Re Remy Distributor. Will you please send us a… | ||
| img017 | From Mr. Royce enquiring about the performance of multi-ring pistons in aero engines during a nose dive. | ||
| View original record | E - Poetic, Honomy? To EH. from E. ORIGINAL E5/B13:6:17. 5 X 2209. X 2369 X 2809. X 2749 Re Pistons. We have been previously informed by you that multi-ring pistons are good for slow running so far as… | ||
| img018 | Brief analysis of a 260 HP German Mercedes engine's performance characteristics. | ||
| View original record | To EH. from R. c.c. to J. ORIGINAL R6/B29:6:17. 3 X.3111 Re 260 HP Mercedes Engine. Thank you for your report on the 260 HP German Mercedes engine. Since this engine appears heavy, roughly 3.7 lbs.… | ||
| img019 | Obtaining and forwarding performance particulars of aeroplanes fitted with the company's engines. | ||
| View original record | To EP. from Oy. EH. c. to R. X 2959 Re Performances of R.R. Engines in Planes. X.2810 May I refer your attention to letter Cjll/C27617, in which Mr. Johnson says "I think it is most desirable that we… | ||
| img020 | Outlining two methods for designing a high-altitude engine, including a proposed safety device. | ||
| View original record | 6 To S. from R. c. to Na. c. to EPC. ORIGINAL. R3/B2:6:17. RECEIVED 4 JUIN 1917 X 3065 Re. Engine for High Altitude. Regarding the engine to the Admiralty specification of not requiring the engine to… | ||
| img021 | Description of an engine's automatic pressure control system, detailing the function of a reservoir, valves, and an aneroid apparatus. | ||
| View original record | To J. from R. 2. pipe. Nominally this small reservoir is closed to the atmosphere, so that the first turn or two of the engine (by hand or otherwise) would cause the pressure in it to fall… | ||
| img022 | Engine's fail-safe mode, where power is reduced upon electrical or oil pressure failure until nearing the ground. | ||
| View original record | Top Annotations: 09-A TDA H, 903 28382, 3.mains, ENJUJO A9 To J. from R. It will be noticed that any failure of the electrical apparatus or the oil pressure means that the engine will still run, but… | ||
| img023 | Description of an engine's pressure-controlled reservoir system involving automatic valves and an aneroid barometer. | ||
| View original record | To J. from R. 2. R3/B2:6:17. pipe. Nominally this small reservoir is closed to the atmosphere, so that the first turn or two of the engine (by hand or otherwise) would cause the pressure in it to fall… | ||
| img024 | Note on an engine regulating device designed to reduce power upon failure until near the ground. | ||
| View original record | OP3A TJA.4 903 2392 BNUUD A9 To J. from R. 3. R3/B2:6:17. It will be noticed that any failure of the electrical apparatus or the oil pressure means that the engine will still run, but at a reduced… | ||
| img025 | Fitting of different piston types and rings to Commander Brigg's car. | ||
| View original record | To EP.) from R. EH.} C to Commander Briggs. C to J. X 2369. R4/B4.7.17. X.682 RE WING-COMMANDER BRIGG'S CAR.X.2369 On a recent occasion during a visit to Commander Briggs re aero engines, I rode in… | ||
| img026 | Proposed engine and suspension modifications, and observations on braking and bodywork issues. | ||
| View original record | -2- new camshafts that we propose using in the "after the war" engines. This should not be the temporary arrangement but the permanent arrangement. When you fit this, it will be necessary to fit the… | ||
| img027 | Proposed car alterations to prevent tyres rubbing the body, awaiting approval from a Commander Briggs. | ||
| View original record | with the frame, the top of the wheel rubs the body. HE.83 Possibly we may get a coach-builder to increase this clearance if Commander Briggs agrees that it shall be attempted. The risk of the tyres… | ||
| img028 | Proposed design changes for the 7 CA car engine, including piston, connecting rod, and camshaft modifications. | ||
| View original record | R.R. 235 A (400 T) (S C. 536 15-2-16) G. 1546. X+2559 X. 2369 RL/B2.5.17. To EH. from R. c. to J. c. to Wor c. to By. X+682 - RE CAR ENGINE 7 CA. c. to M. In reply to your memo EH1/AT19.4.17, I am… | ||
| img029 | Requirements and modifications for an experimental car, including springing, tyres, and engine components. | ||
| View original record | To HH. from R. C. to J. " " By. " " E. " " OV. X.2369. R6/B11.5.17. X.682. - RE CAR 7 CA. I shall only require this car for about a week so that it will be scarcely worth while fetching 49GB from here… | ||
| img030 | Proposed modifications to the 7 CA car engine, including pistons, connecting rods, and camshafts. | ||
| View original record | R.R. 235 A (400 T) (S C. 586 15-2-16) G. 1546. To EH. from R. c. to J. c. to Wor c. to By. c. to M. X 1/2 2559 X.2369. R1/B2.5.17. X+682 - RE CAR ENGINE 7 CA. In reply to your memo EH1/AT19.4.17, I am… | ||
| img031 | Potential car modifications including the back axle, induction pipe, and gear ratios for improved performance and economy. | ||
| View original record | -2- R6/B11.5.17. Contd. switch was drawn out by Mr. Olley and sent to Derby a long time ago. It would be as well if Mr. Olley saw it while he is there. X.2651. I cannot believe it is impossible to do… | ||
| img032 | Responding to a laboratory report on spring steels and suggesting further testing on the Upton-Lewis machine. | ||
| View original record | To Mr.Hall from R. c.c. to J. c. to EFC. ORIGINAL R2/B8:8:17. 3 Thank you for your laboratory report. I think it is excellent for you to send me a copy of one of these every week or once a month. The… | ||
| img033 | Modifications and the urgent dispatch of the 'Falcon' engine for America. | ||
| View original record | To Wor.) from R. EH. ) c. to J. c. to By. ORIGINAL RL/B9:8:18. 3 X.3124 Re "Falcon" Engine for America. I do not know that this engine is waiting for anything from me. Such modifications to the parts… | ||
| img034 | Testing of a new magneto model for future aero engines. | ||
| View original record | R.R. 235B (200 T) (S.D. 408. 26-4-17.) Bm. 2/156/12. To EH. from R. c. to E. c. to Mr. Ellis. c. to BJ. ORIGINAL St. Margaret's Bay. Aug. 28th. 1917. X. 3172. Magneto of type for future aero engines… | ||
| img035 | Porosity of a new piston alloy and agreeing to tests without zinc or tin. | ||
| View original record | To Ry from R. c. to clk. c. to E. c. to Stron. c. to EJ ORIGINAL 3123 3144 3136 St. Margaret's Bay. Sept. 4th. 1917. 6 X. 2749 RECEIVED 6 SEP 1917 R8/W3917. Re - Piston Alloy. Regarding the piston… | ||
| img036 | Directive from Mr. Royce to arrange for the testing of engines on coal gas for production work. | ||
| View original record | EP. from E. C. to EH. C. to Ry. ORIGINAL X. 2163 St. Margaret's Bay. Sept. 7th. 1917 Re - Testing Engines on Coal Gas. R9/W7917. I am directed by Mr. Royce to ask you to arrange to run engines in on… | ||
| img037 | Successful use of stamped crankshafts over ordinary forged ones and recommending their adoption. | ||
| View original record | B.J. from R. c. to Wor. c. to Wd. c. to E.H. ORIGINAL RECEIVED 6 NOV 1917 Re - Crankshaft Forgings. X.2473. With reference to the use of stamped crankshafts in preference to those of the ordinary… | ||
| img038 | Value of aeroplane gearing, engine efficiency, and propeller safety at high speeds. | ||
| View original record | Cy. from R. C. to Zeff. X. 1445 X. 2533 ORIGINAL R2/W10.12.17. 4 I have received a copy of your letter to Doctor Zahm and would like to point out that, so far as I know, on even the fastest of… | ||