Rolls-Royce Archives
| Identifier | Entry | ||
| img001 | Letter from Cadillac Motor Car Company requesting to see drawings of two R.R. joints for the Phantom and 25 HP models. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LaSALLE MOTOR CARS December 30, 1930. Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. My dear Hives: Some men from Mechanics Machine… | ||
| img002 | Telegraphic enquiry from Hives in Detroit to Mr. Olley in Springfield regarding the presence of 'quick step valves' on a specific chassis. | ||
| View original record | Postal Telegraph 871/2 DETROIT M N HIVES SPRINGFIELD MASS FHS FRS Yemphon THREE FORTY SEVEN FOUR NINETY TWO HAWK ONE SEVENTY FIVE TWO TWENTY SIX STOP CAN YOU TELL ME DEFINITELY WHETHER THESE HAD QUICK… | ||
| img003 | Telegram concerning a patent inquiry from General Motors about the import of Quick Step Steel and the delivery of aero engines to the US government. | ||
| View original record | Postal Telegraph THE MACKAY SYSTEM ALL AMERICA CABLES COMMERCIAL CABLES RECEIVED AT STANDARD TIME INDICATED ON THIS MESSAGE This is a full-rate Telegram or Cablegram unless its deferred character is… | ||
| img004 | Intelligence gathering on competitor parts and a potential patent infringement issue. | ||
| View original record | To Sg. From Hs. c. to Wor. Hs!3/WJ.15.1.31. I would like to write to Oy. for certain information. (1) We would like to know why the Delco people are giving up making the twin cylinder type shock… | ||
| img005 | Reciprocal information exchange, the Quickstep Steel matter, and mechanics' joints. | ||
| View original record | To Hs. from Sg. Copy to Wom. I am in receipt of Hs.3/MJ.15.1.31. I quite agree to your writing to Oy. for the information in question, and I also realise that it would hardly be fair to ask him for… | ||
| img006 | Letter to Cadillac discussing Quick-step steel, Delco dampers, universal joints and vehicle ride quality issues like springing and frame 'jellying'. | ||
| View original record | Expl. Dept. January 17th.1930. HS.1/MJ. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan. My.dear OY., I am sorry I have not replied to some of your queries before but I have been busy since I… | ||
| img007 | Letter discussing the Delco Generator, a potential purchase of a twelve-cylinder car, and the state of the aero engine business. | ||
| View original record | -2- Another point I am anxious to get some information on is the Delco Generator Controlled Third Brush. We are always more or less in trouble with dynamo output. The thermostat control for the third… | ||
| img008 | Letter from the Experimental Department to Cadillac Motor Car Co. discussing Delco shock absorbers and steering wobble. | ||
| View original record | Hs./Rm.1/MJ. Expl. Dept. February 21st.1931. M.O.ley Esq., Cadillac Motor Car Co., Detroit, Michigan. Dear Oy., I have read with interest your letter of Feb.11th 1931. With reference to your remarks… | ||
| img009 | Causes of fender shake and high-speed wobble on drums. | ||
| View original record | -2- With regard to fender shake on the drums we do not get this unless we definitely put bumps on the drums because you cannot promote a high speed wobble on smooth drums with our car in its standard… | ||
| img010 | Letter from Cadillac to E.W. Hives discussing technical details on steels, engine valves, dampers, and shock absorbers. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN [Logo: CADILLAC AND LASALLE MOTOR CARS] February 11, 1931. Mr. E. W. Hives, Rolls Royce Limited, Derby, England. My dear Hives: Thank you for yours of… | ||
| img011 | Technical analysis of vehicle riding quality, comparing Cadillac, Packard, and Rolls-Royce models. | ||
| View original record | - 2 - C.C.L. connections. Packard are now using it. (4) Riding quality. After the New York Show two other Cadillac men and I drove up to Springfield in a PI and afterwards rode in the "gin palace"… | ||
| img012 | Letter from M. Olley discussing axle qualities, braking issues, thermostat control, and V-12 engines. | ||
| View original record | - 3 - standard of about 8° and ½" to 1" off center point. We did not want so much off center but got it through using "faked" stuff. The axle has qualities but we cannot assess them very well so far.… | ||
| img013 | Comparing performance data (M.P.H vs R.P.M) with a Maybach engine. | ||
| View original record | 80 M.P.H = 3000 = 2900 Maybach. 80 M.P.H. = 3000 2900 Maybach 80 = 4350 65 = 3500 R.P.M RECEIVED 28 FEB 1938 | ||
| img014 | Letter to M. Olley of Cadillac Motor Car Co. discussing steel, shock absorbers, and Maybach cars. | ||
| View original record | Expl. Dept. Hs.10/MJ. March 20th.1931. M. Olley, Esq., Cadillac Motor Car Co., Detroit, Michigan. My dear Oy., Many thanks for your letter of February 11th. Quickaten Steel. The high chrome and… | ||
| img015 | Letter discussing competitor gearbox technology, market conditions, and two attached reports. | ||
| View original record | -2- Maybach jaws and find that the only satisfactory way of using them is similar to the Maybach, in which there is no neutral position between the top and third. We were rather interested to see that… | ||
| img016 | Letter from Cadillac Motor Car Company discussing vehicle shimmy and fender shake under various conditions. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS March 16, 1931. Mr. E. W. Hives, Rolls Royce, Ltd., Derby, England. Dear Hs / Rm: Many thanks for yours Hs/Rm 1/M.J. of… | ||
| img017 | Page 2 of a letter from Maurice Olley regarding fender shake and Delavaud construction. | ||
| View original record | - 2 - tendency to fender shake, which is avoided by the Delavaud construction. I should greatly appreciate any further notes you may have on this matter. With kindest regards to you both. Yours,… | ||
| img018 | Letter to The Cadillac Motor Car Co. inquiring about the material used for cast iron brake drums in America. | ||
| View original record | Expl. Dept. Hs/GWH. &/KT. 1st April 1931. The Cadillac Motor Car Co. Detroit, Michigan. U.S.A. For the attention of Mr. Olley. Dear Sir, Mr. Hives has asked me to write you in respect of cast iron… | ||
| img019 | Letter to Cadillac Motor Car Co. regarding axle movement experiments and shock absorber characteristics. | ||
| View original record | Expl. Dept. Hs/Rm.10/MJ. April 14th.1931. M.Olley, Esq., The Cadillac Motor Car Co. Detroit, Michigan. U.S.A. Dear Oy., We are not sure whether you had a copy of our axle movement experiments. In case… | ||
| img020 | Letter from Cadillac Motor Car Company discussing an analysis of Delco shock absorbers. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS April 16, 1931. Mr. E. W. Hives, Experimental Engineer, Rolls Royce, Limited, Derby, England. My dear Hives: Thank you very… | ||
| img021 | To Mr. E. W. Hives discussing technical issues with shock absorbers, including back pressure, temperature, and frequency variation. | ||
| View original record | Mr. E. W. Hives #2 It has always seemed to me that since the diagrams grow with frequency for a given stroke they should certainly show a load variation with piston velocity between the middle and… | ||
| img022 | Graph of engine compression curves at variable speeds and strokes. | ||
| View original record | L 1650 COMPRESSION CURVES VARIABLE SPEED VARIABLE STROKE 7" ARM OG-GO VALVES 690"/° 2.50 2.38 1.58 1.00 7" STROKE 3.87 2.50 2.02 1.48 1.00 6" 5" 4" | ||
| img023 | Blueprint detail showing specifications for '4630 COMPRESSION'. | ||
| View original record | 4630 COMPRESSION 3" 2" | ||
| img024 | Blueprint comparing 4 inch and 7 inch stroke designs with associated measurements. | ||
| View original record | 1650 7 1/2 ARM. 640# = 1" OG - Special To off Identum, 4" STROKE 300 250 200 150 100 57 7" STROKE 250 200 150 100 60 32 30 D.Faraday 7.5.31 | ||
| img025 | Blueprint comparing different stroke lengths for standard and short stems. | ||
| View original record | 1650 7 1/2 ARM 640"-1" (STD) OG - STD. STEM (STD) OG - STEM 3/64 SHORT 4" STROKE 7" STROKE 7" STROKE 4" STROKE Numbers on left diagram: 300, 250, 200, 150, 100, 60 Numbers on middle diagram: 200, 150,… | ||
| img026 | Blueprint drawing for a narrow gauge or template with handwritten annotations and dimensions. | ||
| View original record | 3 (in circle) 60 (in outer circle) 1650 3-7"dia... 7/8"per... OL G3 60" hub Exp 340A Replaced this tem on car TG 2-2-21 4 7 2.00 180J PROD 60" .022" THICK | ||
| img027 | Design drawing for a piston, showing dimensions and valve timing information. | ||
| View original record | 1250J - Piston 9H/part 60-140-150-200-220 DG64 Inl. Valve and part ths 40° Retard Timing 640 M 2/4/17 Exh Valve Piston Opens 50 60 2-019 A 7 | ||
| img028 | Blueprint drawing for a half-size 'Valve D' component with three dimensioned views. | ||
| View original record | 1650J - 37" Spring 1/2 size. Valve 'D', +90°, 7" B.R.A., 2/2/21, T.G.A., 2, 4, 7, 30, 60, 250 | ||
| img029 | Letter to Cadillac inquiring about synchro mesh gearbox and steering shock technologies. | ||
| View original record | Hs/Rml/AD. 22nd April, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Cy, Synchro Mesh Gear Box. We have been trying a synchro mesh gear box on the latest 8-cylinder Buick. We… | ||
| img030 | Letter to M. Olley Esq. discussing suspension, frame stiffness ('jellying'), and steering components on various vehicles including the Buick and Phantom II. | ||
| View original record | M. Olley Esq. -2- We agree that probably hydraulic dampers on the front axle have done much for this car, but have no discoveries been made recently in the States with regard to pivot lean, toe-in,… | ||
| img031 | Letter discussing vehicle frame stiffness, component mounting, and competitor car performance. | ||
| View original record | M. Olley Esq. -3- Having been defeated with regard to stiffness, we say that we have proved that we get the best results if we have limited movement in the absence of rigidity and this movement must… | ||
| img032 | Letter from Cadillac Motor Car Company discussing cast iron brake drums and providing a preferred material specification. | ||
| View original record | Handwritten note: Hs/Row many thanks. The C.I. seems to be the Bramitec as you say. By the way I notice you have written a number of notes on the back of 2nd page on radiators. I mention it in case… | ||
| img033 | Observations on surface cracking and wear of molybdenum alloy drums. | ||
| View original record | - 2 - The principal use of the electric furnace is to control the specification with sufficient accuracy. The use of molybdenum as the principal alloy is preferred from experience. (5) Surface cranks… | ||
| img034 | For high and low-speed radiator and bonnet comparison tests at Brooklands. | ||
| View original record | G. Purcelyffe RAD TESTS BROOKLANDS High Speed Test. Rad Comparison Compare Small Hex Tube with large Hex Tube at 60 M.P.H. all closed " " All out * All out Vertical Louvred Bonnet * This speed should… | ||
| img035 | Letter from Cadillac requesting test samples of RR50 aluminum alloys for pistons. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN X. Note by BY2/G285-31 April 27, 1931. Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. My dear Ha/Rm: Many thanks for blue prints of riding tests… | ||
| img036 | Letter to Cadillac discussing gearbox development, including tests of Maybach jaws, synchromesh systems, and quiet helical gears. | ||
| View original record | Expl. Dept. Hs.1/MJ. May 4th.1931. M. Olley, Esq., Cadillac Motor Car Co., Detroit, MICHIGAN. Dear Oy., We have just been through a series of tests with the idea of using the Maybach jaws to give us… | ||
| img037 | Letter discussing Cadillac and Buick cars, magnetos, steering, and business conditions. | ||
| View original record | -2- Hs.1/MJ. 4.5.31. Cont'd. better than the Cadillacs' have with that type of engine. What would you say at the limitations of the eight cyl.?. I am hoping to get R. to try a twelve cylinder Cadillac… | ||
| img038 | Letter from Cadillac Motor Car Company discussing the performance and testing of Delco shock absorbers. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS May 12, 1931. Experimental Department, Rolls Royce, Limited, Derby, England Att. Messrs. Hives and Robotham. Dear Hives and… | ||
| img039 | Technical analysis of competitor synchro-mesh gearboxes and steering systems, including those from Buick and General Motors. | ||
| View original record | Messrs. Hives and Robotham - #2 Synchro Mesh Gear Box. The Buick scheme we all agree is good and simple. It achieves a very high standard of consistency in the production line. Our scheme being partly… | ||
| img040 | Vehicle dynamics, frame stiffness, 'fender shake', and the development of a 'shaker' for testing. | ||
| View original record | F.C/S Messrs. Hives and Robotham -- #3 Even though "drag links" are solid they are by no means rigid and actual frequencies of wobble would indicate a virtual stiffness of the whole assembly of around… | ||
| img041 | Letter discussing vehicle chassis dynamics, specifically axle tramp, frame weave, damping, and stiffness. | ||
| View original record | 50/ Messrs. Hives and Robotham - #4 (e) Tramp of front axle and effect of damping. (f) Rear axle tramp. (g) Torsional weave of frame. (h) Sag oscillation of frame. As far as we have gone it serves to… | ||
| img042 | Discussion comparing epicyclic and synchro-mesh gearbox designs, with reference to a Buick implementation. | ||
| View original record | Detroit. Copies made. May 15/31. 6 My dear Hs. Have just received yours of May 4 and discussed it with E.W. Seaholm. (which perhaps you may not have intended.) Replying to these points as they come… | ||
| img043 | Gearbox design, comparing 3-speed vs 4-speed, synchromesh, and gear manufacturing processes. | ||
| View original record | helicals. If I were you I should forget the twin top idea and the 4 speed box & simply produce a three speed box with all speeds silent, fool proof shift and traditional ratios of 1, 1.7, & 3. I dont… | ||
| img044 | Notes on gear lapping processes, gear production machines, and specifications for helical gears. | ||
| View original record | iron out the variabilities. (3) An extremely good cutting job with an oil hardened steel followed by 1 minute for lapping is indicated as a very fair production process. For superfine work one might… | ||
| img045 | Letter discussing crankshaft balancers, ignition equipment, and asking questions about alloys and chassis design. | ||
| View original record | sets the balancers to exact crankshaft frequency, presumably by adjusting the weight of the outer rim. The rubber has the required damping as well as flexibility. [Thank heaven you have eliminated… | ||
| img046 | Letter to Cadillac Motor Car Co. with a sketch of an apparatus for measuring pressure curves. | ||
| View original record | Hs/Rm.l/KT. Expl. Dept. 23rd. May, 1931. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan. Dear Cy, Referring to your letter of the 16th April. (1) Pressure Curve. FLYWHEEL DRIVEN BY VARIABLE… | ||
| img047 | Report discussing back pressure, inter-leaf friction, temperature and frequency variation in a shock absorber or damper. | ||
| View original record | (2) with the velocity of oil through it, then there is appreciable increase in pressure towards mid stroke as the velocity builds up. We attribute the tendency for the pressure to go on rising after… | ||
| img048 | Details on the design of an indicator cylinder and bumper test procedure for a shock absorber. | ||
| View original record | (3) (5) Size of Indicator Cylinder. Naturally the ordinary steam indicator piston is too large for indicating oil pressure because too much liquid would have to be displaced by the shock absorber… | ||
| img049 | American automotive practices, including various engine designs and gearbox technologies. | ||
| View original record | To R. From Hs. c. to BE. Yor. c. to S. Da. c. to By. AMERICAN PRACTICE. Some time ago I wrote to By. saying that as they had produced an 8 cyl., 12 cyl., and 16 cyl., engines would he give me his… | ||
| img050 | Letter discussing the principles and performance of different shock absorber valves. | ||
| View original record | Detroit. June 12/31 X832. My dear Riv. Thank you for your notes on shock absorber testing. The Spicer sh. abs. which has a delivery valve consisting of a hole in a ground plate with a ground spring… | ||
| img051 | Letter to Cadillac discussing Packard's adoption of a harmonic stabilizer and a dashpot type synchro mesh. | ||
| View original record | Hs/Rml/AD. July 2nd, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Cy. We notice in Automotive Industries of June 30th that Packards have adopted a harmonic stabiliser in order to… | ||
| img052 | Letter to Cadillac requesting technical information on bumper rigs, crankshaft dampers, inlet valves, and balance weights. | ||
| View original record | Expl. Dept. He/Rm./MJ. July 21st.1931. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan U.S.A. Dear Oy., How are you getting on with the Bumper Rig? We want to try the Buick torsional… | ||
| img053 | Request for information about a Buick-type torsional vibration damper for a 25 HP car. | ||
| View original record | Oy. From Ha/Gry. Ha/Gry.2/MJ.20.7.31. We want to try the Buick type of torsional vibration damper on our 25 HP. car and think you might be able to let us have some information on this type of damper.… | ||
| img054 | Letter of introduction for Mr. Kaye Don, driver of the 'Miss England' motorboat, to M. Olley of Cadillac Motor Co. | ||
| View original record | A.C.C. HS2/AD. August 10th, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Cy. I have not had time recently to pester you for information on car work because we have been up to our… | ||
| img055 | Letter to Cadillac Motor Car Co. asking why American aero engine makers no longer use battery ignition. | ||
| View original record | File. Hs4/AD. August 10th, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Cy, There is one point on which I am seeking information and that is, why the American aero engine makers… | ||
| img056 | Letter from Cadillac to W.A. Robotham discussing synchronizers and radiator mounting. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN [Logo text: CADILLAC AND LASALLE MOTOR CARS] July 13, 1931. Mr. W. A. Robotham, Rolls-Royce, Limited, Derby, England. My dear Rm: Thank you for your short… | ||
| img057 | Page two of a letter signed by Maurice Olley regarding ride, road holding, and universal joint wear. | ||
| View original record | - 2 - Especially reference to ride, road holding, universal joint wear, etc. Kindest regards to Hs and yourself, Yours, Maurice Olley M. Olley fe | ||
| img058 | Letter to Cadillac Motor Car Co. regarding steering, carburetter despatch, and quiet centrifugal superchargers. | ||
| View original record | Hs/Rn.11/MJ. March 24th, 1932. M.Olley Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Cy, Thank you very much for your notes on steering. It was exactly what I wanted. I find that there… | ||
| img059 | Letter to Cadillac Motor Car Co. regarding an S.U. carburetter from a 6-litre Bentley and an inquiry about exhaust system materials. | ||
| View original record | Hs/Rm.5/AD. April 2nd, 1932. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan, U.S.A. Dear Oy, I am sending you today under separate cover an S.U. carburetter having 1¾" throttle diameter. This… | ||
| img060 | The despatch and invoicing of a S.U. carburetter to Cadillac Motor Car Co. | ||
| View original record | D/BP. From Hs/Rm. C. Despatch Stores. C. Wor. Hs/Rm.6/AD. 2.4.32 We are sending into the Stores for despatch to M.Olley Esq. Engineering Dept. Cadillac Motor Car Co. Detroit, Michigan U.S.A. One 1… | ||
| img061 | Letter to Cadillac Motor Car Co. regarding radiator cap pressure and a crankshaft testing rig. | ||
| View original record | Hs/Rm.5/AD. April 12th, 1932. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan, U.S.A. Dear Oy, Thank you for your letter of March 15th. The radiator cap is really only used as a seal and blows… | ||
| img062 | Letter from Cadillac Motor Car Company regarding a sample S.U. carburettor and shock absorber design. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN April 28, 1932 Mr. W. A. Robotham, Rolls Royce, Limited, Derby, England. Dear Robotham: We have received the sample S.U. carburetor for which many thanks.… | ||
| img063 | Letter to Cadillac inquiring about automatic tappet adjustment and synchro mesh technology. | ||
| View original record | Hs/Rm.1/AD. May 5th, 1932. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Oy. Automatic Tappet Adjustment. We shall shortly be running an engine fitted with the Cadillac automatic tappet… | ||
| img064 | Pre-paid cable to Cadillac Motor Car Company inquiring about the use of synchro-mesh gears by manufacturers. | ||
| View original record | PRE-PAID CABLE Olley, Cadillac Motor Car Company, Detroit, Michigan. Are any car manufacturers fitting synchro mesh to all gears or more gears than two highest ratios If so please name. Robotham. | ||
| img065 | Correspondence with Cadillac regarding a carburetter bill, car figures, and superchargers. | ||
| View original record | Expl. Dept. Ha/Rm.1/MJ. 7th. May 1932. M.Olley Esq., Cadillac Motor Car Co., Detroit, U.S.A. Dear Oy., Thank you for your letter of the 28th. I am sorry R.R. sent a bill with the S.U. carburetter but… | ||
| img066 | Telegram discussing issues with a four-speed transmission and synchro mesh clutches. | ||
| View original record | ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Commercial Cable Time Received: 9 30 Date: 10.5.32 To: Roypar Robotham By: 66 from: Detroit Michigan 9th Your speed transmission practically dead no… | ||
| img067 | Letter from Cadillac Motor Car Company providing experience and feedback on synchromesh transmissions. | ||
| View original record | Copy for R.H.C. FILE CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LaSALLE MOTOR CARS May 25, 1932. Mr. W. A. Robotham, Rolls Royce, Limited, Derby, England. Dear Rm: Will try to catch up… | ||
| img068 | Letter discussing four-speed gearboxes, synchronizers, silent gears, and the 'monkey clutch'. | ||
| View original record | - 2 - A four-speed box might use synchronizers on three forward speeds, but in practice the speed which is only entered when the car is standing does not need it. Cannot tell you anything more which… | ||
| img069 | Suggesting an order be passed to the Cadillac Motor Car Co. for a steering column. | ||
| View original record | To ROY/MS. from Hs/Rm. Hs/Rm.4/KT. 24.6.32 CADILLAC STEERING COLUMN. Herewith the correspondence with reference to this matter. We suggest you pass an order for £15.0.0. to the Cadillac Motor Car Co.… | ||
| img070 | Letter to Cadillac Motor Car Co. requesting a steering column and box for testing on a Phantom II. | ||
| View original record | Hs/Rm.S/KT. June 24th. 1932. W. Oxley Esq., Cadillac Motor Car Co, Detroit, Michigan U. S. A. Dear Cy, One of the features that struck us most when in the States, was the excellence of the Cadillac… | ||
| img071 | Blueprint sketch with dimensions for the steering column of a Phantom II chassis. | ||
| View original record | Min: 56.500 Max: 57.500 18.750 Dia. 17" Min. 19" Max 7.00 Min. 8.500 Max. 7.750 Crs. 9.500 Movement No of Turns of Steering Wheel for full lock = 2.52 Min 6.500 Max 7.500 6.750 Sketch of Steering… | ||
| img072 | Poor steering on the P.2 model and requesting a Cadillac steering assembly for evaluation. | ||
| View original record | W.O.R. from Hs/Mp. [STAMP: RECEIVED JUN 1932] XSk.M./ADC.1.6.32. [STAMP: PHAETON II STEERING] We recently sent a long report on this subject to R. There is no doubt that the steering on P.2. is one of… | ||
| img073 | Letter from Cadillac Motor Car Company regarding the dispatch and technical specifications of a steering gear. | ||
| View original record | O.S. Files CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LA SALLE MOTOR CARS August 30, 1932. Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. . Dear Hs.: The steering gear is now… | ||
| img074 | Letter from Maurice Olley discussing steering gear design, efficiency, and road handling characteristics. | ||
| View original record | - 2 - I want to say, however, that our ideals on steering are different. We, with our rear shackled front springs, need a gear which is fairly irreversible to prevent the wheel swinging around in our… | ||
| img075 | Letter to Cadillac Motor Co. discussing steering gear comparisons, power output, and performance of automatic tappet adjustment. | ||
| View original record | Hs/Rm.6/KT. Sept.17th.1932. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan, U.S.A. Dear OY, Many thanks for your letter of Aug 30th. We have not yet received the steering gear, but understand… | ||
| img076 | Issues with petrol pumps, carburetors, and adjustable tappets. | ||
| View original record | -2- We are battling to get a successful petrol pump at the moment. The more we see of the A.C. type of pump, the less we like it. They have got petrols in Germany which will make the fabrics shrivel… | ||
| img077 | Letter to M. Olley of Cadillac discussing factory activity, the Harrison Radiator Block, rear-engine motorcars, and supercharging experiments. | ||
| View original record | Expl. Dept. Hs/Rm.17/MJ. 9th. December 1932. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., I wonder how you are getting on. You will perhaps be interested to know that… | ||
| img078 | Letter regarding Mr. Lovesey's trip to America with Sir Malcolm Campbell. | ||
| View original record | -2- Hs/Rm.17/ML.9.12.32. Cont'd. Mr. Lovesey, whom you may remember in this Dept. is going over to America with Sir Malcolm Campbell in January, sailing on December 31st. He will probably pay you a… | ||
| img079 | Letter to M. Olley of Cadillac discussing business conditions, car sales, the Bentley acquisition, and plans for a new Bentley model. | ||
| View original record | Expl. Dept. Hs.5/MJ. 3rd. January 1933. M. Olley Esq., The Cadillac Motor Car Co., Detroit, Michigan.U.S.A. My dear Oy., I hope it is not too late to wish you a happy and prosperous new year, both… | ||
| img080 | Car development projects, updates on the 18 HP and Phantom II models, and a personnel assignment to the USA. | ||
| View original record | -2- Ha.5/WJ.3.1.33. Cont'd. be reasonably free from noise. It has been agreed now that we scrap the a/c. idea and we are fitting to the car a 3½ Litre engine. We think it is going to be a remarkably… | ||
| img081 | Letter discussing a visit to the U.S.A, aero-engines, the health of Sir Henry, and a future report. | ||
| View original record | -3- Ha.5/W.J.1.1.33. Cont'd. The other point, perhaps more important as far as I am concerned, is that I recognise how essential it is for Motor-car and Aero engine builders on this side to adopt the… | ||
| img082 | Letter to M. Olley of The Cadillac Motor Car Co. enclosing a report on the Dubonnet car. | ||
| View original record | M. Olley Esq., The Cadillac Motor Car Co., Detroit, Michigan U.S.A. 4th. January 1933. Dear Oy., Attached herewith Rm's. report on the Dubonnet car, as promised in my letter of yesterday. Yours… | ||
| img083 | Letter to M. Olley of Cadillac Motor Car Co. responding to queries about the Burney rear-engine car and independent rear wheel systems. | ||
| View original record | A.Sc. Hs/Rm2/AD. August 17th, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Oy. Thank you for your letter of July 13th. I have to apologise for our apparent curtness in the note… | ||
| img084 | Letter to M. Olley Esq. discussing the performance and characteristics of various car suspension systems. | ||
| View original record | M. Olley Esq. Detroit Michigan. -2- Unfortunately this type of suspension has never been put on a big car with a large speed range - all the models running are about 14 HP, with little low-built… | ||
| img085 | Favourable feedback on the Phantom II's springing from a critic with experience at Cadillac. | ||
| View original record | To Sg. From Hs. c.c. to Wor. Hs.2/WJ.28.8.31. Attached herewith copy of a note received from Oy. which ma' be of interest, especially his comments on Phantom 11. It is satisfactory to hear that he… | ||
| img086 | Letter from Cadillac Motor Car Company regarding an introduction, battery ignition, and a Phantom II vehicle. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS August 20, 1931. Mr. E. W. Hives, Rolls-Royce, Limited, Derby, England. My dear H. S.: Thank you for your letter of August… | ||
| img087 | Letter to Cadillac Motor Car Co. discussing market conditions and requesting information on remote control hydraulics. | ||
| View original record | Hs/Rm.1/AD. September 15th, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Cy, Thank you for your interesting letter. Your remarks about the wealth of the poor and the poverty of… | ||
| img088 | Letter to M. Olley Esq. about the Schneider and Harmsworth Trophies and their relevance to the U.S. automobile industry. | ||
| View original record | M, Olley Esq. -2- The conclusion of the Schneider and Harmsworth Trophy will enable us to take a much keener interest in car work and therefore anything you can tell us re the trend of the automobile… | ||
| img089 | Letter discussing the results of a bumper rig test on a car. | ||
| View original record | Hy W. A. Robotham Rolls Royce Ltd Derby England 6 copies. Hey Dear Rul A belated reply to yours of July 21/31 @ Bumper Rig We have only just got a car on it and 15 hours at 11 mph (with 2" bumps, 2… | ||
| img090 | Body shells for load reproduction, vibration damping, and the balance of springs and dampers. | ||
| View original record | We have to use a body shell to reproduce anything like service conditions since we are still using the body to take a good share of the loads (a condition which I think entirely wrong) Anything you… | ||
| img091 | The principles of dampers, referencing Frahm anti-rolling tanks and suggesting adjustments for crank frequency. | ||
| View original record | The principle is exactly the same as the Frahm anti-rolling tanks, namely that at the critical speed the damper (or water in the tanks) is 90° out of phase with the motion of the object. It tends to… | ||
| img092 | Reflection on engine damper design and a discussion on the function of balance weights, with references to Lanchester and GM. | ||
| View original record | It seems to me this is a clear case where mathematical analysis would have have made a vast difference and would have the whole world paying royalty to RR Ltd. The original R.R damper with… | ||
| img093 | Letter discussing crankshaft design, masked valves, a motor race, and observations on the American motor industry. | ||
| View original record | 5 long and of small dia that trouble might be encountered with torsional (?) disturbances if a small no of heavy weights were used, rather than 12 smaller weights. (d) Masked valves. "We know of no… | ||
| img094 | Letter from Maurice Olley discussing changing market conditions and competitor performance. | ||
| View original record | Is one to lose one's youthful faith or is there a nigger in the woodpile somewhere? I think the nigger is that R.R. has failed to acknowledge changing conditions, the increasing poverty of the rich,… | ||
| img095 | Letter from Delco Aviation Corporation to Cadillac Motor Car Company regarding the history and use of battery ignition on aircraft engines. | ||
| View original record | COPY DELCO AVIATION CORPORATION Dayton, Ohio. August 22, 1931. Mr. Maurice Olley Cadillac Motor Car Company Detroit, Michigan. Dear Mr. Olley: We want to thank you for thinking of us in regard to the… | ||
| img096 | Letter from Cadillac congratulating on the Schneider race and offering feedback on propeller shaft design. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LaSALLE MOTOR CARS September 15, 1931. Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. My dear Hs.: Yesterday we cabled congratulations… | ||
| img097 | Letter to Cadillac Motor Car Co. discussing calculations for the whirling speed of a Phantom II propeller shaft. | ||
| View original record | Expl. Dept. Ha/Gry.2/MJ. 1st. October 1931. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan. Dear Mr. Olley, Hs. has asked me to reply to your query about the Phantom 11 propeller shaft. We… | ||
| img098 | Engineering drawing of a splined cylindrical component with dimensional specifications. | ||
| View original record | 1.0145 DISS, FINISH BROACH., .254, .250, 1/8 R, 1/8, BROACH - 8 SPLINES, EQUALLY SPACED, 1.040, 1.038, 1.7073 P.D., LOWER END, 20°, COPPER PLATE TO THESE DIMEN., 1.761, 1.749, 1.381, 1.369, 1/32, 4… | ||
| img099 | Technical drawing detailing a cross-section of a worm gear with specific dimensions and machining notes. | ||
| View original record | RELATION OF KEY TO THREAD AS SHOWN .960 / .954 BORE BEFORE BROACHING SCALE - DOUBLE SIZE ¢ OF WORM CONES TO BE GROUND FROM THIS CENTER ¢ OF 22 TOOTH CUTTER 1/8 CHAMFER NOT OVER 1/8 R THIS CORNER TO BE… | ||
| img100 | Technical drawing of a component with a left-hand single thread. | ||
| View original record | L.H. SINGLE THREAD HELIX ANGLE . 7° 11' D.P. 6.61075 C.P. .69136 TOOTH FORM 0.15 P ADDEN. .177 DEDEN. .205 T AXIAL .30000 P.R AXIAL 30° P.R NORMAL 29° 25' NOTES AND STOCK G.M.C. X.1314-STEEL. HEAT… | ||
| img101 | Drawing for a left-hand worm steering gear with a 20:1 ratio. | ||
| View original record | SAGINAW STEERING GEAR DIVISION GENERAL MOTORS CORPORATION SAGINAW, MICHIGAN, U.S.A. WORM STEERING LH-20:1. PART NO. 261290. MAT. STEEL DRAWN BY F.E.K. TRACED BY DATE DEC. 8, 1931. CHECKED BY G.W.S.… | ||
| img102 | Letter discussing damper orifice regulation and ride quality, including a graph of oil pressure versus velocity. | ||
| View original record | Detroit. October 18/31 Dear RW, I have not replied to yours of Sep 15 before, because the matter was not fully worked out. The trouble with orifice-regulation of dampers appears to be that the freer… | ||
| img103 | Suspension damping, orifice effects, and the phenomenon of 'boulevard jerk'. | ||
| View original record | low "dry friction" in the suspension, the lack of damping at the inception of axle movements allows them to build up to greater amplitudes, & shake the car actually more with orifice than without. We… | ||
| img104 | Letter discussing suspension damping, orifice control, and ride comfort characteristics. | ||
| View original record | Since the orifice remains constant and ⑤ small, one gets a very different sort of ride at the lower settings from that obtained with orifice control. As we knew on the R.R. quite low arm loads (when… | ||
| img105 | Letter from Cadillac Motor Car Company regarding the results of Bumping Rig tests on springs. | ||
| View original record | for Hrs 150 : 60Hrs CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS RM GRY October 19, 1931 Mr. E. W. Hives Rolls Royce Ltd. Derby, England Subj: Bumping Rig Dear Sir: So… | ||
| img106 | Page 2 of a letter from Cadillac Motor Car Company discussing vehicle testing results and issues. | ||
| View original record | -2- There is a progressive loosening up between body and frame, which, while it develops squeaks and rattles seems to save the entire car assembly from actual cracks and breakage. Criticism of the… | ||
| img107 | Letter to Cadillac discussing post-Schneider race engine developments, including synchro-mesh gearboxes and fluid flywheels. | ||
| View original record | Expl. Dept. Hs.2/MJ.20.10.31. October 20th.1931. M. Olley, Esq., Cadillac Motor Car Co., Detroit, Michigan. U.S.A. Dear Oy,. Now that we have finished with the fun and excitement of the Schneider… | ||
| img108 | Letter discussing vehicle riding qualities, adjustable dampers, and the 'Miss England' racing boat. | ||
| View original record | -2- Hs.2/ML.20.10.31. Cont'd. On riding qualities we are still struggling. We find we can satisfy all customers but not with the same treatment, so we are now using three ranges of springing with… | ||
| img109 | Letter from Cadillac Motor Car Company to E. W. Hives regarding propeller shaft assemblies. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS October 21, 1931 Mr. E. W. Hives Rolls Royce Ltd. Derby, England Dear Sir: Subj: Propeller Shaft Replying to Hs/Gry 2/WJ I… | ||
| img110 | Letter discussing formulas and specifications for the critical speeds of drive shaft tubes. | ||
| View original record | COPY MECHANICS UNIVERSAL JOINT COMPANY Division of Borg-Warner Corporation ROCKFORD, ILLINOIS October 19, 1931 C. A. S. Engineering Company, 5-139-140 General Motors Bldg. Detroit, Michigan. Attention… | ||
| img111 | Letter to Cadillac seeking information on induction pipe silencing, shock absorbers, and exhaust valve practices. | ||
| View original record | Ha/Ba.3/KT. 31st October 1931. M.Olley, Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., Can you give me any information on how to silence induction pipe roar. I understand that… | ||
| img112 | Letter to Cadillac discussing test results for propeller shafts, road springs, and shock absorbers. | ||
| View original record | Hs/Rm.4/AD. November 2nd, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan. Dear Cy, Many thanks for your information on propeller shafts. It is very good of you to answer our queries so… | ||
| img113 | Letter discussing chassis vibration test results and inquiring about the use of aluminium drums with cast iron linings in the US. | ||
| View original record | -2- You will therefore see that we do not get results quickly because we are making good motor cars, and we expect your results are due to the same cause. We find that if we run at 150 R.P.M. of the… | ||
| img114 | Letter from Cadillac Motor Car Company requesting information on trick white metals under the Hall patents. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS November 4, 1931 Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. My dear Hs: Will you tell me anything which is… | ||
| img115 | Letter to Cadillac discussing a US visit to research American synchro-mesh and silent gearbox technology. | ||
| View original record | Expl. Dept. Ha/Rm.3/MJ. November 9th.1931. M. Olley, Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., It is more than probable that I shall be coming to the States in about the second… | ||
| img116 | Letter to Cadillac Motor Car Co. inquiring about the use of dynamic balancing machines. | ||
| View original record | X Expl. Dept. Ha/Ory.13/MJ. November 12th.1931. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Mr. Olley, Will you let us have your views on the use of dynamic balancing… | ||
| img117 | Letter to Cadillac Motor Car Co. discussing experiences with Hall's and Kelmet bearing alloys. | ||
| View original record | Expl. Dept. Hs.3/MJ. November 10th.1931. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. My. dear Oy., I have just received your note re. Hall's bearing alloys. We did a lot of work… | ||
| img118 | Letter discussing a trip to the U.S.A. to research dynamic balancing machines for car parts. | ||
| View original record | -2- Ha./MJ.16.11.31.Cont'd. I am expecting that Rm. will go out to U.S.A. immediately after Christmas. We are trying to get it established that the Expl. Dept. can send someone out out every year in… | ||
| img119 | Letter to Cadillac Motor Car Co. inquiring about improvements to Bijur drip plugs, which are found to be blocked after endurance tests. | ||
| View original record | Oy file. Expl. Dept. Ha/Rm.1/MJ. November 19th.1931. M.Olley Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., At the risk of inducing you to waste far too much of your time… | ||
| img120 | Letter from Maurice Olley of Cadillac regarding bearing alloys, crankshaft balancing and suspension damping. | ||
| View original record | CADILLAC and LASALLE MOTOR CARS CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN December 1, 1931. Mr. E. W. Hives, Rolls Royce Limited, Derby, England. My dear Hs: Thank you very much for your notes on… | ||
| img121 | Letter to M. Olley of Cadillac discussing rear-engined cars, specifically the Burney and a Beverley Barnes straight 8 power unit. | ||
| View original record | Hs/Rm.1/AD. December 12th, 1931. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan, U.S.A. Dear Oy, Thank you for your informative letter. I shall hope to pick up information fully on these… | ||
| img122 | Passenger comfort, noise levels, and speed performance of a vehicle. | ||
| View original record | -2- (1) Suspension and comfort for passengers generally. Owing to the engine being behind the back axle and all the transmission aft of the rear passengers, the amount of head room was astonishing.… | ||
| img123 | Advantages and disadvantages of a rear-engined car, its potential market success, and competitor reactions. | ||
| View original record | Hs/Rm.1/ADL.2.12.31 contd. -5- The disadvantages of the car are what one would expect. The features they are not directly interested in, they have not got right i.e. the steering and the brakes. The… | ||
| img124 | Cablegram from Detroit advising that Robotham Industry will probably start buying from January onwards. | ||
| View original record | Commercial Cables CLARENCE H. MACKAY, PRESIDENT. Handed in (Local Standard Time) On 15TH. (This information is only supplied in Full-rate messages.) All America Cables Postal Telegraph U.S.A. 95,… | ||
| img125 | Letter to M. Olley of Cadillac Motor Car Co. regarding travel arrangements to Detroit. | ||
| View original record | Hs/Rmj3/AD. January 13th, 1932. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan, U.S.A. Dear Cy, This is just to let you know that I am sailing on the 'Baltic' on the 16th and therefore shall… | ||
| img126 | Letter to Cadillac Motor Co. regarding the dispatch of aluminium alloy test pieces. | ||
| View original record | HS/ECV.1/MA. February 15th, 1933. M. Olley Esq., Cadillac Motor Co. Detroit, Michigan, U. S. A. Dear Mr. Olley, We have had a cable from you, asking us to send you some test pieces of our Aluminium… | ||
| img127 | Sending 8 cast bars of two different casting alloys (53 and R.R. 50) to the laboratory. | ||
| View original record | To Hs. HLL/AG.13.2.32. Laboratory. We send you herewith 8 bars cast in the standard Air Ministry chill (9" long and 1" diameter.) They represent two casting alloys. The high temperature alloy (such as… | ||
| img128 | Eight cylinder head alloy test pieces to be sent to Cadillac Motor Co., Detroit. | ||
| View original record | Y To Despatch Stores. From Ha/Gry. c. to S.O. c. to O.O. Ha/Gry.y/MJ.15.2.32. We are sending herewith, for despatch to W.Olley Esq., Cadillac Motor Co., Detroit, Michigan, U.S.A.:- Eight test pieces… | ||
| img129 | Letter to M. Olley of Cadillac Motor Car Co. regarding a sketch of a joggling rig and the ordering of a carburetter. | ||
| View original record | File He/Gry.1/MA. February 24th, 1932. M. Olley Esq. Cadillac Motor Car Co. Detroit, Michigan, U.S.A. Dear Mr. Olley, We have heard from Rn. who has asked us to send you a sketch of the joggling rig.… | ||
| img130 | Letter to Mr. Olley of Cadillac Motor Co. regarding a drawing of the Phantom radiator cap. | ||
| View original record | File. Hs/Gry.6/MA. February 29th, 1932. M. Olley Esq., Cadillac Motor Co. Ltd., Detroit, Michigan U.S.A. Dear Mr. Olley, We are sending you herewith as requested by Rm. a drawing of the Phantom… | ||
| img131 | Letter from Cadillac discussing front axle geometry, radiator caps, and testing rigs. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS March 15, 1932. Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. Dear Hs.: Thank you for the print of the radiator… | ||
| img132 | Conclusion on an arrangement with and without a shimmy shackle. | ||
| View original record | Mr. E. W. Hives - #2 March 15, 1932. Have reached the conclusion that this is an undesirable arrangement without a shimmy shackle. But with the latter it is very good indeed. Sincerely, Maurice Olley… | ||
| img133 | Letter from Cadillac Motor Car Company to Rolls Royce regarding the performance of AC fuel pumps in Germany. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS February 7, 1933. Rm Mr. E. W. Hives, Rolls Royce, Limited, Derby, England. Dear E.W.: In connection with a recent letter… | ||
| img134 | Confirming correspondence has been returned and a thank you letter has been sent to Cy. | ||
| View original record | Hs. from Wor. Cy's File WorS/T21.3.33. Your correspondence returned herewith I have to-day written to Cy. thanking him for his help with Lovesey and also inviting anyone to visit our Works. Wor. | ||
| img135 | Letter from Cadillac Motor Car Company regarding a 12 cyl. fan, needle bearing joints, and shock absorbers. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT. MICHIGAN CADILLAC AND LASALLE MOTOR CARS Mr. E. W. Hives Rolls Royce Ltd. Derby, England March 4th. 1933 Dear Hives: With regard to the jobs that I took over from… | ||
| img136 | Letter discussing the performance of inertia shock absorbers and referencing an attached generator output chart. | ||
| View original record | a stiffer rebound valve to operate) and experiment with inertia valve and with the "cut-in point" of the inertia weight until the car snubs down well on a donkey-back. Attached sketch may make this… | ||
| img137 | Hand-drawn diagram illustrating the function of a lead weight within an oil-filled damper chamber. | ||
| View original record | LEAD WEIGHT IN OIL-FILLED CHAMBER (Bump) On the upward stroke, at upward accelno of 1g or as desired (set by changing shims A below spring) wt. slides all the way down closing holes B, cutting out the… | ||
| img138 | Performance curves for a 93H D generator showing limits when cold and hot. | ||
| View original record | CURVE 3671 PERFORMANCE CURVES OF 93H D GENERATOR LIMITS - COLD LIMITS - HOT VOLTS AMPERES R.P.M. JCB/HIDAY 16-1-31 | ||
| img139 | Letter discussing André Dubonnet's cars, suspension device, and patent status. | ||
| View original record | Dear Hs. Re Dubonnet Car Thank you very much for copies of notes on this matter. We have spent some time with Dubonnet and on his cars, of which he had two - a not very successful sedan car, & a… | ||
| img140 | From Maurice Olley regarding work progress, with various technical calculations concerning weight and efficiency. | ||
| View original record | Lovesey left some jobs for me to do, which I have been forced to neglect hitherto in order to earn my bread & butter. They are now under way & I will write you about them shortly. Best wishes… | ||
| img141 | Letter from Delco Products Corporation confirming the shipment of experimental shock absorbers. | ||
| View original record | DELCO PRODUCTS CORPORATION DAYTON, OHIO March 31, 1933 Rolls-Royce St. Derby, England Attention: Mr. E. W? Hives Gentlemen: We are arranging to forward one set of experimental shock absorbers which… | ||
| img142 | Letter to M. Olley at Cadillac regarding the automotive industry, a new Bentley, and streamlining challenges. | ||
| View original record | Hs/Rn.8/KT. May 10th 1933. M.Olley Esq, Cadillac Motor Car Co, Detroit, Michigan U.S.A. Dear Oy, I have just been reading your letter to Wor., and am glad to hear that you are surviving the… | ||
| img143 | Letter discussing royalties, shock absorbers, power output, fuel quality, and competitor analysis of American cars. | ||
| View original record | -2- done on it here so far, we still think it must be taken seriously as a long dated investment, but at present have little time for the design and development work necessary. I expect that you are a… | ||
| img144 | Letter from Delco Products Corporation to Cadillac providing test machine connecting rod length information. | ||
| View original record | DELCO PRODUCTS CORPORATION DAYTON, OHIO W A Robotham 6-6-33 Mr. Maurice Olley, Cadillac Motor Car Co., Detroit, Mich. Dear Sir: Supplementing my letter of June 2nd regarding Rolls-Royce, we thot you… | ||
| img145 | Letter to Cadillac discussing bringing a Bentley to America and critiquing an Essex Terraplane. | ||
| View original record | Hs/Rm.14/KT. June 15th 1938. M. Orley Esq., The Cadillac Motor Co., Detroit, Michigan, U.S.A. Dear Oy., Thank you very much indeed for your extremely good letter. I don't know of anyone who can… | ||
| img146 | Diagram for a Torsional Load Indicator mechanism. | ||
| View original record | TORSIONAL LOAD INDICATOR. LINK ARM. SHOCK ABSORBER CROSS HEAD CONNECTING ROD. NOTE - WEIGHT STEM TO BE SAME ANGLE AS INSTALLED ON CAR. PREFERABLY NOT OVER 10°. 4" STROKE 23 1/2" | ||
| img147 | Excerpt from a letter discussing the performance and cornering ability of a 20/25 HP car. | ||
| View original record | -2- manage to drive these cars with safety. The power unit is of course an excellent piece of work and the acceleration marvellous, but I am sure that we could beat it from point to point with our… | ||
| img148 | Value of unofficial correspondence with Mr. Olley regarding General Motors' advanced development and the impact of economic policies on American car imports. | ||
| View original record | OJ's file. To Sg. From Hs. C. to Wor. c. to E. C. to Hy. c. to Lh. C. to Hdy. C. to Ev. Hs.2/WJ.17.6.33. Attached herewith copy of a letter Hs. has received from Mr. Olley. We find that the unofficial… | ||
| img149 | Letter discussing the performance and market for competing American cars and their challenge to the luxury car segment. | ||
| View original record | My dear Rm Thanks for yours of May 10. Have been carrying it around to answer it and of course forgot it till this morning when I sent my winter clothes to the cleaners. Have made inquiries about the… | ||
| img150 | Car design principles, comparing large versus small cars, and the merits of rigid frame and body construction. | ||
| View original record | 2 even the work I have been doing here on ride comfirms this belief, and I see myself digging the grave of the large car while drawing wages for improving it. nearly As a vehicle the small car has all… | ||
| img151 | Comparative analysis of competitor vehicle chassis rigidity, engine mounting, and resulting road performance issues. | ||
| View original record | 3. from nose trouble they are not immune. Even with a floated engine they have trouble with shock absorber noise & tire noise. The new spoked tin wheels which threaten to replace wire, are full of… | ||
| img152 | Automotive design trends, aerodynamics, and passenger placement. | ||
| View original record | 4 and that overdoing the thing which gives the worst results will generally effect a cure. Parasite wind resistance is being held down. See this year's Studebaker with the slot between fender & hood… | ||
| img153 | Rear-engine car design, weight distribution, and handling characteristics. | ||
| View original record | 5. central when car is normally loaded seems essential. Burney's reasoning for a 2/3 - 1/3 division is deliberate misrepresentation of the N.P.L. work on braking and is not borne out by anything we… | ||
| img154 | Technical note discussing potential improvements in car design including heating, brakes, and weight reduction. | ||
| View original record | and the suspension mounted on the body cowl. Allowing for the eventual number of approach shots, the questions to be answered, and the necessity of the change, I should presume that Jan. 1937 would… | ||
| img155 | Rear engines, streamlining, and the importance of the power-to-weight ratio for acceleration in city traffic. | ||
| View original record | 7. Rear engines would be a great help in getting rid of the vast hole in the front of the frame made by a 16 cyl. engine with unit transmission. Some way to bridge this gap effectively seems… | ||
| img156 | Superchargers, shock absorbers, and the influence of various road conditions on ride quality and suspension. | ||
| View original record | 8. provided that reasonably efficient means exist for getting the power to the rear wheels. This limits our interest in streamlining and increases our interest in power weight ratio. A super-charger… | ||
| img157 | Vehicle suspension dynamics, ride control, and the performance of shock absorbers on long-wave road undulations. | ||
| View original record | 9 smoothed into perfect sin waves five or six years ago on the assumption that "Stop Look & Listen" signs would hold the public to 20 mph. Nowadays electric warning signals which show a flashing red… | ||
| img158 | Letter from Maurice Olley discussing design reactions, workload, and specific engineering topics. | ||
| View original record | paper and as the Society preprints say "we accept no responsibility for the opinions of the writer". Neither do they contain any revelations of future Cadillac or other designs. If they excite a… | ||
| img159 | Market analysis comparing American small cars with larger, more expensive models, discussing their respective merits and market positions. | ||
| View original record | COPY. My dear H., Thanks for yours of May 10th. Have been carrying it around to answer it and of course forgot it until this morning when I sent my winter clothes to the cleaners. Have made enquiries… | ||
| img160 | Analysis of competitor vehicle body and engine mounting techniques and their effects on noise and vibration. | ||
| View original record | -2- As a recent convert to the rigid frame and body school. The subframe on P.11. was a mistake, and a heavy and costly one. The solid mounted bodies, Chrysler & Packard, make better motor cars. My… | ||
| img161 | Future car design principles, including rear engines, wheelbase, weight distribution, and aerodynamics. | ||
| View original record | forward reduce wind resistance by forcing more air through a given radiator. The dimension from front wheels to windshield is being reduced, not so much to prevent fender-shake as to get rear… | ||
| img162 | Technical report discussing potential improvements in engines, brakes, streamlining, and shock absorbers. | ||
| View original record | -4- Weight Saving Engines. We do not approach your figures of 1/2 HP. per cubic inch even with 80 Octane fuel. Oil cooling for summer conditions of 110°F. seems to hold us back. Hydraulic brakes. With… | ||
| img163 | Letter from Maurice Olley discussing road conditions, ride comfort, and shock absorber design. | ||
| View original record | -5- we have so many in this country. The familiar donkey backs in England and "caniveaux" in France are nothing to our road builder's nightmares embalmed in concrete. In general, these concrete roads,… | ||
| img164 | Short typed memo acknowledging unofficial correspondence and the value of its contents. | ||
| View original record | Oy's file To Hs. from Sg. Copy to Wor.E. Ex. Hs. Hq. FW. Sg10/E20.6.33 Very many thanks for /Hs.2/MJ.17.6.33 with copy of letter from Oy. to Rm. I quite realise that the unofficial correspondence that… | ||
| img165 | Letter to Cadillac discussing the Motor Show, Bentley camshaft troubles with Textolite gears, and visits from American companies. | ||
| View original record | tus Experimental Dept. Ha/Rm. 2/T. August 7th 1933. M. Olley Esq., The Cadillac Motor Co, Detroit, Michigan, U.S.A. Dear Oy, Are any of your people coming over for the Motor Show, to see how much we… | ||
| img166 | Letter to M. Olley of Cadillac discussing an upcoming US visit, supercharger research, and gearbox developments. | ||
| View original record | He/Ru.CC/KT. Sept 27th 1933. M. Olley Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., It appears that my visit to America this autumn will materialise. I shall be coming over… | ||
| img167 | Letter discussing developments in engine design, camshafts, suspension, and wind tunnel tests. | ||
| View original record | -2- combustion chamber you want, the valve and valve porting, and you can deal with the expansion of your block at one piece instead of twelve. Dealing with higher output engines forces us to be… | ||
| img168 | Letter from Maurice Olley of Cadillac to W. A. Robotham of Rolls-Royce arranging meetings for visiting staff. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN September 22, 1933. Mr. W. A. Robotham, Rolls Royce, Limited, Nightingale Road, Derby, England. Dear Rm: Thank you for your friendly letters, which I… | ||
| img169 | Letter from Cadillac Motor Car Company regarding the timing of a visit. | ||
| View original record | Copy CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS October 10, 1935. Mr. W. A. Robotham, Rolls Royce, Limited, Derby, England. Dear Rm.: Thanks for your letter of… | ||
| img170 | Letter to Cadillac discussing the testing and performance of aluminium pistons and the R.R.53 alloy. | ||
| View original record | Experimental Dept. HS/Rm.7/KT. Oct 25th 1933. M. Olley, Esq., The Cadillac Motor Car Co. Detroit, Michigan. Dear Cy, Many thanks for your letter of the 10th. We had Messrs. Seaholm and Thompson at the… | ||
| img171 | Piston specifications, a potential order for Aerolite pistons, and a query on Ford's cyanide hardening process. | ||
| View original record | -2- and they have stood up remarkably well. Our standard piston weighs 15 1/4 ozs. and cracks across the gudgeon pin boss if subjected to this treatment. The Aerolite piston (Light Production Co's… | ||
| img172 | Letter from the Cadillac Motor Car Company to W. A. Robotham thanking him for hospitality during a visit to Derby. | ||
| View original record | WOR. CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS OFFICE OF THE CHIEF ENGINEER November 3, 1933. Hs/Rm Mr. W. A. Robotham, Rolls Royce, Limited, Derby, England. Dear… | ||
| img173 | Letter from Cadillac Motor Car Company proposing a car swap with Rolls Royce for evaluation. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS November 3, 1933. Mr. W. A. Robotham, Rolls Royce, Limited, Derby, England. My dear Rm: Thank you for the good time you… | ||
| img174 | Despatch of a free scrap Aerolite piston to The Cadillac Motor Co. in Detroit. | ||
| View original record | To Despatch Stores. C. D/BP. Hs/Rm/20/KT.16.11.33. We are sending into the stores for despatch to Mr.Olley, The Cadillac Motor Co., Detroit, Michigan, U.S.A., one scrap Aerolite piston. This is free… | ||
| img175 | Letter to Cadillac Motor Co. comparing the material specifications of Aerolite 122 and RR.53 alloys for pistons. | ||
| View original record | Experimental Dept. Hs/Rm.19/KT. November 16th 1933. M. Olley Esq., The Cadillac Motor Co., Detroit, Michigan, U. S. A. Dear Oy., Further to my letter of Oct. 25th, I am sending you under separate… | ||
| img176 | Piston failure, design choices, and market conditions in America. | ||
| View original record | -2- The piston we are sending you failed through a valve head coming off and hitting the crown, but it should be good enough to show you what bedding they obtain, and also the dimensions of the… | ||
| img177 | Letter to Cadillac arranging a visit for an employee to observe American automotive production. | ||
| View original record | Experimental Dept. November 30th 1933. Ha/Rm.14/KT. M. Olley Esq., The Cadillac Motor Co., Detroit, Michigan, U.S.A. Dear Cy., Coverley, who you will remember was entirely responsible for the… | ||
| img178 | Letter to M. Olley of Cadillac discussing a surge in domestic car sales, factory extensions, and a planned visit for Mr. Coverely to the USA. | ||
| View original record | Oys fine Hs.1/MJ. 2nd. December 1933. M. Olley Esq., Cadillac Motor Car Co., Detroit, Michigan, U.S.A. My dear Oy, It is a long time since I wrote to you but we are always very interested in your… | ||
| img179 | Continuation of a letter discussing personnel movements, a potential car exchange, and left-hand drive chassis production. | ||
| View original record | Hs.1/WJ. Cont'd. -2- 2nd. December 1933. management, but I dread to think what will happen when the next deep depression arises. I especially would be grateful for all you could do for Coverley… | ||
| img180 | Letter to M. Olley of The Cadillac Motor Co. regarding a photograph and prints of a 3-litre Bentley engine induction port. | ||
| View original record | ry Experimental Dept. Ha/Gry.10/KW. 8th February, 1934. M. Olley, Esq., The Cadillac Motor Co., Detroit, Michigan, U.S.A. Dear Mr. Olley, We have heard from Rm. that you want a photograph and prints… | ||
| img181 | Letter to Cadillac in Detroit discussing vehicle handling, requesting specifications for a Buick, and information on valve spring steel for comparison. | ||
| View original record | Exptl. Dept. HS/Rm.19/KW. 19th April, 1934. M. Olley, Esq., The Cadillac Motor Co. Co., Detroit, Michigan, U.S.A. Dear Olley, I have now had three weeks of detuning in Derby but am still full of good… | ||
| img182 | Letter discussing springs made of straight carbon wire in Detroit and the arrival of the first La Salle in England. | ||
| View original record | -2- Hs/Rm.19/KW.19.4.34. I understand that the springs that were made for me in Detroit were of straight carbon wire. I do not know whether they were cold wound or not. Certainly I never broke one. I… | ||
| img183 | Letter to the Cadillac Motor Car Co. discussing the performance of Aerolite pistons, including test results and planned modifications. | ||
| View original record | Exptl. Dept. HS/Rn.9/KW. 3rd May, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Olley, Ellie asked me for particulars of our piston, of which we send him the… | ||
| img184 | Letter to Cadillac requesting an arrangement drawing for the new baby Buick and a catalogue for thermostats, with an update on Dubonnet suspension. | ||
| View original record | Exptl. Dept. HA/Rtn.1/KW. 7th May, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Olley, Thank you for your letter of April 25th. I do not believe we have an… | ||
| img185 | Page two of a letter with closing remarks to Mrs. Olley and family. | ||
| View original record | -2- HS/Rn.1/KW. 7.5.34. family. Kindest regards to Mrs. Olley and the Yours sincerely, FOR ROLLS-ROYCE LIMITED. | ||
| img186 | Comparison between 'Wishbone' and 'Dubonnet' independent suspension systems. | ||
| View original record | COPY. Andre Dubonnet, 33, Rue des Graviers (114, Boulevard Maurice-Barres) Neuilly, France. 3rd May, 1934. INDEPENDENT SUSPENSION. Mr. Maurice Olley has stated that the Goodyear's dynamic tire… | ||
| img187 | Comparison of Dubonnet and wishbone suspension systems, detailing their respective features and drawbacks. | ||
| View original record | -2- (5) For bump and rebound stops - in the wishbone system there is a ratio for the coil spring and a much higher ratio for the shock absorber whereas in the present Dubonnet system the ratio of the… | ||
| img188 | List of features for a mechanical system, likely related to suspension or steering, numbered 4 to 7. | ||
| View original record | -3- (4) Extreme sensitiveness due to the absence of friction caused by the joints or silent block which exist in all other systems. (5) Presentation much neater - no upkeep as all moving parts are… | ||
| img189 | Letter to Cadillac regarding valve spring information, the delayed arrival of a Cadillac and an enquiry about a new Buick. | ||
| View original record | of Exptl. Dept. Hs/Rn.4/KW. 24th May, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Olley, Thank you for your letter of May 9th, and for the valve spring information… | ||
| img190 | Inquiry to Cadillac regarding General Motors' practice of increasing main bearing diameters. | ||
| View original record | Exptl. Dept. HS/Rn.6/KW. 29th May, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy, Can you tell me why it is General Motors' practice to have increasing main… | ||
| img191 | Letter to the Cadillac Motor Car Co. asking about Buick suspension specifications and front stabilisers. | ||
| View original record | Exptl. Dept. HE/RB.16/KW. 31st May, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy, I have received the specification of the Buick car from Mr. Chayne. Thank you… | ||
| img192 | Letter from the Cadillac Motor Car Company discussing rubber bushings and front roll stabilizers. | ||
| View original record | E. Please note Rem Seen 23/6/34 By Da CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS June 12, 1934. tes ED Mr. W. A. Robotham, c/o Rolls Royce, Limited, Derby, England.… | ||
| img193 | Letter to Cadillac regarding a synchromesh problem with the Bentley gearbox. | ||
| View original record | cy Exptl. Dept. Hs/Rm.15/KW. 31st July, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Olley, We have run into trouble with the synchromesh on the Bentley and wonder… | ||
| img194 | Letter to M. Olley of Cadillac regarding the difficult arrival of a Cadillac and issues with agents. | ||
| View original record | oy Exptl. Dept. Hs/Rm.1/KW. 31st July, 1934. M. Olley Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Olley, The Cadillac has finally arrived, we are letting London try it before we… | ||
| img195 | Letter discussing expectations for a Buick, a US heat wave, and features for a future Cadillac. | ||
| View original record | -2- I hope the Buick will come up to expectations on the road as it will be disappointing if it is not good enough to buy after all. Kind regards to Mrs. Olley, and I hope you are surviving the heat… | ||
| img196 | Letter from Cadillac Motor Car Company regarding the practice of stepped crank bearing diameters. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC and LASALLE MOTOR CARS August 7, 1954. Mr. W. A. Robotham, Rolls-Royce, Limited, Derby, England. Dear Em: Replying to your's of May 29th (rather… | ||
| img197 | Letter from Cadillac Motor Car Company regarding Synchromesh clatter and potential cures. | ||
| View original record | GRT. Please note Ey CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS August 14, 1934. Mr. W. A. Robotham, Rolls-Royce, Limited, Derby, England. Dear RM: Replying to yours… | ||
| img198 | Experiments with clutch disc fabrics, linings, and lubricants to resolve vibration issues. | ||
| View original record | -2- Various forms of flexible drive in the clutch disc were only partially successful. Tapering the clutch fabric so that it was .002" to .003" thicker on the inner than on the outer edge was a… | ||
| img199 | Letter to M. Olley at Cadillac discussing synchromesh rattles, crankshaft bearings and comparing a Cadillac's performance to the Phantom II. | ||
| View original record | cy Exptl. Dept. Hs/Rm.5/KW. 26th August, 1934. M. Olley Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., Thank you very much for your letter on synchromesh rattles and… | ||
| img200 | Typed letter providing feedback on a car's performance, handling, and wireless set installation. | ||
| View original record | -2- Hs/Rm.5/KW.28.8.34. The acceleration is of course better than the Phantom, but not as good as it might be owing to the weight of the car which is 58 1/2 cwts. The speedometer is only 2.7 M.P.H.… | ||
| img201 | Letter discussing feedback and performance comparison of a Cadillac motor car. | ||
| View original record | ROLLS-ROYCE LTD. DERBY. Exptl. Dept. TELEGRAMS: "ROYCAR, DERBY" TELEPHONES: DERBY 1280 (6 LINES) IN YOUR REPLY PLEASE QUOTE H8/Rm.5/KW. 28th August, 1934. M. Olley Esq., c/o. The Cadillac Motor Car… | ||
| img202 | Performance and handling review of a vehicle, including feedback on the wireless set and comparisons to other models. | ||
| View original record | -2- Hs/Rm.5/KW.28.8.34. Handwritten: 6569# Our figures show 665# The acceleration is of course better than the Phantom, but not as good as it might be owing to the weight of the car which is 58½ cwts.… | ||
| img203 | Letter to Cadillac inquiring about their experience with Lavine Steering Gear after seeing an advertisement. | ||
| View original record | Exptl. Dept. HS/RM.17/KW. 6th September, 1934. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., I notice in 'Automotive Industries' of August 18th an advertisement for… | ||
| img204 | Letter to M. Olley of Cadillac Motor Car Co. arranging to meet at the Bentley Stand. | ||
| View original record | Exptl: Dept. Hs/Rn.5/KW. 15th October, 1934. M. Olley, Esq., c/o. The Cadillac Motor Car Co., General Motors, Olympia, LONDON. Dear Oy., We were somewhat disappointed not to see you at Derby last… | ||
| img205 | Personal letter to M. Olley at Cadillac requesting parts and information. | ||
| View original record | Exptl. Dept. Ha/Rm.10/KW. 25th October, 1934. M. Olley, Esq., c/o. the Cadillac Motor Car Co., Detroit, Michigan, U.S.A. PERSONAL Dear Oy., Here is the picture of the frame that I said I would send to… | ||
| img206 | Letter to the Cadillac Motor Car Co. requesting a right-hand steering system and mentioning a vehicle test report. | ||
| View original record | Oy Exptl. Dept. Hs/Rn.16/KW. 7th November, 1934. M. Olley Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., I hope you had a good trip home. We are still most anxious to get hold… | ||
| img207 | Test drive report detailing the car's steering, riding qualities, and handling on various roads in France. | ||
| View original record | COPY. Hotel Du Lion Rouge, Soissons (Aisne). 5.11.34. To Hm. We took the following route to-day, 60% being pave, some real bad -Boulogne, St. Omer, Cassel, Bailleul, Armentiers, Lelaries, La Bassee,… | ||
| img208 | Letter to the Cadillac Motor Car Co. inquiring about the advantages of American-style steering gears. | ||
| View original record | Exptl. Dept. RM/FJH.10/KW. 19th November, 1934. M. Olley, Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Sir, We are at present making efforts to improve the steering of our… | ||
| img209 | Letter querying the suitability of a 1934 La Salle Saginaw steering gear against a Phantom II's front axle weight, and requesting helix angle data for Cadillac and La Salle steering cams. | ||
| View original record | -2- There is a further point on which we are not clear. We have, over here, a Saginaw steering gear taken from a 1934 model La Salle. We believe that the weight of the front end of the La Salle is… | ||
| img210 | Night letter cablegram to Cadillac Motor Company regarding the helix angle on a Cadillac 16 steering gear worm. | ||
| View original record | o/y 19/11/34 (NIGHT LETTER CABLEGRAM). OLLEY, CADILLAC MOTOR COMPANY, DETROIT, MICHIGAN, U.S.A. WHAT IS HELIX ANGLE STEERING GEAR WORM ON CADILLAC 16. Ha/Hardy, Roycar, Derby. | ||
| img211 | Cablegram from Detroit to Derby requesting steering design choice, referencing Cadillac Sixteen or Buick/LaSalle models. | ||
| View original record | Commercial Cables CLARENCE H. MACKAY, PRESIDENT. PLEASE MARK YOUR REPLY VIA COMMERCIAL TELEPHONE FOR MESSENGER TO COLLECT YOUR CABLEGRAMS. TELEPHONE: CENTRAL 2084 (3 LINES) All America Cables Postal… | ||
| img212 | The steering systems of Cadillac and LaSalle cars, referencing a Mr. Olley. | ||
| View original record | fj 26.11.34; OLLEY, CADILLAC MOTOR COMPANY, DETROIT, MICHIGAN, U.S.A. STEERING REQUIRED INSIDE FRAME LIKE LASALLE BUT CADILLAC HELIX ANGLE. ROBOTHAM; | ||
| img213 | With sketches comparing T-slot and Trans-Slot piston designs, materials, and performance. | ||
| View original record | E.C to W.O. By Wd. holes on Pistons. Just gathered from Byron Ellis. At present we are using pistons with T slots thus :- These are in Lynite possibly similar to Y alloy. The difference in practice… | ||
| img214 | Note on engine bores, pistons, cold knocking, and oil consumption. | ||
| View original record | (about 1/3rd of Total friction) 2 as the latest Nelson Invar Strut type) We have them in both Low. Exe & Lynite without definite preferences either way. Cold knocking may be due to distorted bores and… | ||
| img215 | Summary of observations on cam ground, aluminium, and trans-slot pistons. | ||
| View original record | 3 All pistons are cam ground and are a very pretty job. We dream of the day when we can produce a circular ground piston which will bed itself. Making an accurate job of the cams is very difficult &… | ||
| img216 | And a diagram concerning engine and chassis components. | ||
| View original record | Cylinder liners are not believed necessary if piston, ring, and lubrication conditions, and shape of cylinder bores are thoroughly controlled. Wear at very high mileage is small. No accurate figures.… | ||
| img217 | Notes on piston designs, materials, and performance from America, comparing 'T' slot and 'Trans-slot' types. | ||
| View original record | To E. from Hs/Rm. c. to Wor. c. to By. c. to Hm/Wd. We give below copy of some notes on Pistons, received from Mr. Olley in America :- "Notes on Pistons, just gathered from Byron Ellis. "At present we… | ||
| img218 | Engine cold knocking, piston types, oil consumption, and cylinder bore issues. | ||
| View original record | -2- Cold knocking may be due to distorted bores, and is not worrying us at all with the trans-slot piston. Our bores, after years of work, are fairly round. On a new engine with cylinders cast… | ||
| img219 | Technical memo discussing piston design, V.8 manifolds, and shock absorbers. | ||
| View original record | -3- Now will you write me something about pistons ? Particularly, do you cam grind and if so how, and how accurately ? New V.8 manifolds are arranged with single intake ports and a duplex down-draught… | ||
| img220 | Cablegram comparing Cadillac and LaSalle steering characteristics, recommending a front stabilizer to reduce wheel fight. | ||
| View original record | Form No. 6. WESTERN UNION (THE WESTERN UNION TELEGRAPH COMPANY) CABLEGRAM 1320 ANGLO-AMERICAN TELEGRAPH Co., Ld. CANADIAN NATIONAL TELEGRAPHS DEC. 1 PM 3 23 HS MF BM 46 DETROITMICH 35 1 NLT ROYCAR… | ||
| img221 | Specifications and sourcing of a steering system for the Spectre model, comparing it to Cadillac and La Salle systems. | ||
| View original record | To E. from Hs/Rm. c. to Nor. c. to Da. Hs/Ru.4/KW.3.12.34. Spectre Steering. We have been endeavouring to get a steering for the Spectre similar to that fitted to the Cadillac 16, in order that we may… | ||
| img222 | Cablegram to the Cadillac Motor Company concerning steering helix angle specifications. | ||
| View original record | NIGHT LETTER CABLEGRAM. OLLEY, CADILLAC MOTOR COMPANY, DETROIT, MICHIGAN, U.S.A. HELIX ANGLE OF OUR LASALLE STEERING SEVEN POINT FOUR DEGREES THE SIMILAR ONE YOU MENTION HAVING FIVE FIFTY SEVEN HELIX… | ||
| img223 | Continuation page for information about a stabiliser. | ||
| View original record | - CONTINUATION - FOR INFORMATION ABOUT STABILISER. ROBOTHAM; | ||
| img224 | Forwarding a note received from Olley, suggesting the information is worth following up. | ||
| View original record | To E. from Hs/Rm. c. to Wor. c. to Da. c. to By. Hs/Rm.9/KW.7.12.34. Attached is a copy of a note we have had from Olley. We think the information is well worth following up. HE/Rm. | ||
| img225 | Letter from Maurice Olley advising on front stabiliser placement and stiffness to improve vehicle handling. | ||
| View original record | COPY Nov. 25th, 1934. Dear Rn., Here is a tip straight from the horse's mouth. The stabiliser should be at the front not at the rear. It should be set back of the front wheels, to reduce frame shake.… | ||
| img226 | Memo detailing suspension and handling improvements based on test results. | ||
| View original record | Dear Pim here is a tip straight from the horse's mouth. The stabilizer should be at the front not at the rear. It should be set back of the front wheels, to reduce frame shake. "The rotary stiffness"… | ||
| img227 | Correspondence about steering troubles, a new steering gear, and a front stabilizer. | ||
| View original record | 2. Am giving you this much sooner than I probably ought to because from your cables you still have steering troubles and am convinced this is the real solution. We'll get after a steering gear for you… | ||
| img228 | Letter to M. Olley at Cadillac Motor Car Co. discussing pistons, steering, and suspension systems. | ||
| View original record | Exptl. Dept. Hs/Rn.9/KW. 10th December, 1934. M. Olley, Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Oy., Thank you for your various notes. With regard to pistons, Ellis… | ||
| img229 | Technical report comparing the performance and issues of a Buick Series 40 and a Cadillac. | ||
| View original record | -2- He/Rm/9/KW.10.12.34. We have now got our series 40 Buick and are on the whole very pleased with it. We do think that they might have fitted a better intake and exhaust silencer because these are… | ||
| img230 | The end of a letter with festive wishes and mention of upcoming travel to the States. | ||
| View original record | -3- Hs/Rm.9/KW.10.12.34. Best wishes for Christmas and the New Year. It is probable that Lovesey and Ellor will be in the States in January. Kind regards to Mrs. Olley. Yours sincerely, | ||
| img231 | Graph of pressure face diameters given by standard cam forms for a No. 14 cam. | ||
| View original record | TAKEN AT 68° F GRAPHS OF PRESSURE FACE DIAMETERS GIVEN BY STANDARD CAM FORMS Nº 14 CAM. MAJOR AXIS .000" .001" .002" .003" .004" .005" .006" .007" .008" 27° 36° 45° | ||
| img232 | Graph plotting the reduction of diameter against degrees from the major axis. | ||
| View original record | REDUCTION OF DIAMETER .000" .001" .002" .003" .004" .005" .006" .007" .008" MAJOR AXIS DEGREES FROM 9° 18° | ||
| img233 | Report to Cadillac on vehicle performance after 6,000 miles, highlighting issues with suspension and bearings. | ||
| View original record | Exptl: Dept. Ha/Rn.6/KW. 17th December, 1934. M. Olley, Esq., c/o The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Cy, Here is a report on the Cadillac after 6,000 miles running. One of our… | ||
| img234 | Night letter cablegram to Cadillac Motors reporting the failure of all Cadillac gudgeon pin bushes and requesting replacements. | ||
| View original record | NIGHT LETTER CABLEGRAM 19.12.34. OLLEY, CADILLAC MOTORS, DETROIT, MICHIGAN, U.S.A. ALL CADILLAC GUDGEON PIN BUSHES FAILED PLEASE SEND REPLACEMENTS. ROBOTHAM, ROYCAR, | ||
| img235 | Cover letter to M. Olley at Cadillac Motor Car Co. regarding a Cadillac Bush. | ||
| View original record | Exptl. Dept. HS/Rm.14/KW. 19th December, 1934. M. Olley, Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Cy., Here is the Cadillac Bush referred to in my letter of the 17th… | ||
| img236 | Letter to Cadillac regarding vehicle suspension and engine issues during testing. | ||
| View original record | Exptl. Dept. He/Rm.3/KC. 15th January, 1935. M. Olley, Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Cy, Lovesey and Ellor should now be in America, and will probably have seen… | ||
| img237 | Letter discussing the performance of the car body, road springs, and damping. | ||
| View original record | -2- Hs/Rm.3/KW.15.1.35. The body is standing up astoundingly well, possibly aided by your admirable road springs and damping. Kind regards and all the best, Yours sincerely, | ||
| img238 | Routing slip for a letter from Mr. Olley and a paper on tyres by Mr. Evans. | ||
| View original record | To E. From: HE/Rm. c. to WCR. c. to W By. c. to Da. c. to Hdy. We attach hereto copy of a letter dated January 12th from Mr. Olley, together with a pre-print of Mr. Evans' paper on tyres. Will you… | ||
| img239 | Letter from Cadillac discussing steering gear and the advantages of a front stabilizer. | ||
| View original record | E C to Wo. By. Da. Haly CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LA SALLE MOTOR CARS January 12, 1935. Mr. W. A. Robotham, Rolls-Royce, Limited, Derby, England. Dear RM: Am trying to… | ||
| img240 | Analysis of the effects of a front stabilizer on vehicle handling, steering, and tire wear. | ||
| View original record | -2- (5) Gives a lighter steering and less spin-back effect when emerging from a turn. (6) Reduces wheel fight enormously. (7) Gives a quicker response to the steering. (8) Permits higher inflation… | ||
| img241 | Technical analysis of front stabilizers, cornering power, and tire wear on vehicles. | ||
| View original record | -3- I am sure that a front stabilizer will make you not want a Cadil-lac steering. But if you still want one we will send one. Cornering Power Attached sketch chart shows the "heart" of a paper to be… | ||
| img242 | LaSalle steering systems, gear load capacity, bearing efficiency, and handling stability. | ||
| View original record | -4- The combination of zero camber and a front stabilizer with say a 5 lb increase in pressure, gives normal front tire life. LaSalle Steering The front weight of the LaSalle is not 2400 lbs but about… | ||
| img243 | Technical analysis of vehicle handling stability, slip angles, and the effects of gyroscopic shocks. | ||
| View original record | -5- Handling stability continued: (say a rh camber) a force F is applied at the c.g. Reaction forces F1 equal to F b/l and F2 equal to F a/l, must occur at front and rear ends respectively. Slip… | ||
| img244 | Analysis of factors causing wheel shimmy and recommendations for improvement. | ||
| View original record | -6- that results in shimmy. We have this pretty well proved, although I cannot go into details at the present time. Nine factors seem to affect wheel fight (or shimmy):- (1) Degree of parallel action.… | ||
| img245 | Engine oil specifications, potential causes for wristpin bushing issues, and the quality and future of brake systems. | ||
| View original record | -7- It is about SAE 60 or 110 seconds at 210 degrees Fahrenheit. 90 second oils are recommended for the transmission in winter time. So you have been running on an oil heavier than transmission oil.… | ||
| img246 | Letter from Maurice Olley discussing shackles, shocks, and steel rings. | ||
| View original record | -8- steel rings with the ribs rolled in them, annealed to give a pearlitic structure, and welded to a low carbon disc, seem to compete with centrifuse for the new markets. Pierce Arrow has used them… | ||
| img247 | Blueprint diagram illustrating the principles of vehicle handling stability. | ||
| View original record | HANDLING STABILITY. ø1 ø2 l a b A B C F F1 F2 OLLEY JAN. 11/35. | ||
| img248 | Two graphs illustrating the relationship between self-aligning torque, slip angle, load, and camber. | ||
| View original record | SELF - ALIGNING TORQUE Top Graph: Y-Axis: SELF - ALIGNING TORQUE X-Axis: SLIP ANGLE X-Axis Values: 0, 5°, 10° Lines: 8° CAMBER 2500 # LOAD 0° CAMBER 8° CAMBER 1000 # LOAD 0° CAMBER Bottom Graph:… | ||
| img249 | Blueprint diagram illustrating the crankcase ventilation system for 16 CAD. | ||
| View original record | CRANKCASE VENTILATION, 16 CAD., B, AIR OUTLETS, A, AIR INLET | ||
| img250 | Blueprint comparing original and present steering gear designs. | ||
| View original record | EQUIVALENT STEERING GEAR STEERING GEAR ORIGINAL MARLES SAGNIAW PRESENT GEARS OLLEY. JAN. 11/35 | ||
| img251 | Graph illustrating the cornering power of a tire in relation to load, camber, and slip angle. | ||
| View original record | CURVE OF CORNERING POWER OF A TIRE. CORNERING POWER IN LBS OF SIDE THRUST PER DEGREE OF SLIP ANGLE. MAX. 0° CAMBER. 8° CAMBER. LOAD ON TIRE. RATED LOAD. LOAD DIFFERENCE ON INNER & OUTER ON A MODERATE… | ||
| img252 | Diagram illustrating the geometry of a slip angle. | ||
| View original record | FIG 13, A, SLIP, ANGLE, X, C | ||
| img253 | Four graphs illustrating tire performance characteristics including cornering force, power, and coefficient. | ||
| View original record | FIG. 1 CORNERING FORCE - POUNDS SLIP ANGLE TIRE SIZE 7.50-17 6-PLY LOAD 1500 LBS INFLATION 30 LBS CAMBER 0° FIG. 2 CORNERING POWER TIRE 'A' TIRE 'B' CAMBER FIG. 3 CORNERING POWER 0° CAMBER 5° CAMBER… | ||
| img254 | Series of four graphs illustrating factors affecting tire cornering power. | ||
| View original record | FIG. 5 CORNERING POWER 0, 100, 200, 300, 400 CENTRIFUGAL EFFECT 0, 100, 200, 300, 400 MILES PER HOUR 0, 25, 50, 75, 100 COR. POWER CENT. EFFECT FIG. 6 CORNERING POWER 0, 50, 100, 150, 200 INFLATION… | ||
| img255 | Four graphs analyzing precession and static torque against slip angle, radial load, and offset. | ||
| View original record | FIG. 9 PRECESSION TORQUE SLIP ANGLE 2500 LBS 1000 LBS LEGEND: SOLID LINE: 0° CAMBER DASHED LINE: 8° CAMBER FIG. 10 PRECESSION TORQUE RADIAL LOAD 8° CAMBER 0° CAMBER FIG. 11 STATIC TORQUE RADIAL LOAD… | ||
| img256 | Letter to Cadillac Motor Car Co. discussing initial spring deflection calculations. | ||
| View original record | Exptl. Dept. HS/Les.15/KW. 28th February, 1935. M. Olley, Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Mr. Olley, We are still making surprising discoveries about your… | ||
| img257 | Letter to Cadillac Motor Car Co. discussing bearing lubrication issues and material choices. | ||
| View original record | gy Exptl. Dept. Ha/Rn.6/KW. 6th March, 1935. M. Olley Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Cy., Many thanks for your letter. Re lead bronze bearings - we are asking… | ||
| img258 | Query regarding the superior gear grinding process and machinery used for the Cadillac gearbox. | ||
| View original record | -2- Hs/Rm.6/KW.6.3.35. At present we do not run into such high oil temperatures that our main bearings are affected: it is only the big ends which suffer under extreme heat. Now we would like to ask… | ||
| img259 | Letter to Cadillac detailing the findings from the teardown of one of their cars after a run in France. | ||
| View original record | Exptl. Dept. HS/Ra.12/KW. M. Olley Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Olley, We have now had the Cadillac car in pieces after its run in France. Attached is H.C's report… | ||
| img260 | Letter discussing vehicle condition, gearbox information, company prosperity, and the horsepower tax. | ||
| View original record | -2- The steering was in excellent condition. The rear road springs were completely rusted up but did not seem to be any the worse for this. Do you find those wearing pads actually give you a softer… | ||
| img261 | The condition of a Cadillac engine after 20,000 miles. | ||
| View original record | C O P Y. To Hs. from RHC. RHC.7/MB.5.4.35. Cadillac Strip Condition after 20,000 Miles. ENGINE UNIT. Cylinders. Assuming the original bore diameter to have been 3.000", the amount of wear varies from… | ||
| img262 | Inspection report detailing wear on the camshaft & auxiliary drive, front wheel suspension, and rear road springs. | ||
| View original record | -2- RHC. 7/MS.5.4.35. Camshaft & Auxiliary Drive. The timing chain has worn approx. .010 at each link pin and there is a total stretch of approx. .600. CHASSIS. Front Wheel Suspension. The threaded… | ||
| img263 | Incorporating Cadillac gearbox information, specifically 45° helix angle gears, into the next Spectre gearbox. | ||
| View original record | To E. c. to Wor. c. to Hy. c. to Dn. c. to Hdy. c. to R.C. Ey Ha/Rm.10/RW.26.4.35. We wrote to Cy. re the Cadillac gearbox. Attached is a copy of his reply. We propose to incorporate as much of the… | ||
| img264 | Letter from Cadillac Motor Car Company discussing the design of silent transmission gears, particularly helical gears. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LASALLE MOTOR CARS April 17, 1935. Mr. W. A. Robotham, Rolls-Royce, Limited, Derby, England. Dear Rm: In reply to your question about our… | ||
| img265 | Inter-office memo discussing the manufacturing processes and improvements for LaSalle transmission gears. | ||
| View original record | CADILLAC MOTOR CAR COMPANY INTER-ORGANIZATION LETTERS ONLY DATE 4-10-35 TO Mr. W. Olley ADDRESS FROM E. R. Ryland ADDRESS SUBJECT Processing LaSalle Transmission Gears. All gears are hobbed in one cut… | ||
| img266 | Conclusion of an inter-organization letter discussing methods for making quiet transmission gears. | ||
| View original record | GM 47 CADILLAC MOTOR CAR COMPANY INTER-ORGANIZATION LETTERS ONLY DATE 4-10-35 TO ADDRESS FROM ADDRESS SUBJECT -2- In conclusion it is safe to say that there is as yet no one decidedly superior method… | ||
| img267 | Inter-organization letter detailing production methods for making Cadillac transmission gears. | ||
| View original record | CADILLAC MOTOR CAR COMPANY INTER-ORGANIZATION LETTERS ONLY DATE April 2, 1935 TO Mr. E. W. Seaholm ADDRESS FROM E. R. Hyland ADDRESS SUBJECT Mr. W. A. Robotham's Letter to K. Olley, March 6, 1935. In… | ||
| img268 | Inter-organization letter from Cadillac Motor Car Company discussing gear tooth relief, rotary lapping, and practices for LaSalle transmissions. | ||
| View original record | GM 47 J CADILLAC MOTOR CAR COMPANY INTER-ORGANIZATION LETTERS ONLY DATE April 2, 1935 TO ADDRESS FROM ADDRESS SUBJECT -2- may at this time show a slight relief due to the grinding wheel not having… | ||
| img269 | Blueprint of a geared shaft showing the forward and coast driven sides of the teeth. | ||
| View original record | FORWARD DRIVEN SIDE COAST DRIVEN | ||
| img270 | Blueprint detailing specifications and driving sides for counter shaft gears. | ||
| View original record | AFT DRIVING SIDE- FORWARD DRIVING SIDE- NOTE-ALL COUNTER SHAFT GEARS ARE MADE TO CORRECT LEAD. PRESSURE ANGLE, INVOLUTE AND TOOTH THICKNESS AS SPECIFIED ON DETAIL DRAWINGS. REVERSE DRIVING 890381… | ||
| img271 | Blueprint showing a cutaway view of geared components and their engagement. | ||
| View original record | NOTE - ALL MAIN S LEANED IN THE REGARDLESS OF THE REVERSE I URE ANGLES T -FORWARD DRIVING 890380 RD DRIVEN SIDE- EN SIDE | ||
| img272 | Isometric cutaway drawing of several interlocking gears and shafts. | ||
| View original record | Part Numbers: 890384, 890385, 890379. Labels: SIDE-. Table Headers: CHANGE RECORD, ORDER No., DATE, MARK. Title Block: CADILLAC, PART NAME, SKETCH, MATERIAL, DR. McEDOIN, TR., CH. | ||
| img273 | Blueprint with specifications for modifying helical gear teeth to control contact patterns. | ||
| View original record | MAIN SHAFT HELICAL GEAR TEETH TO BE MODIFIED IN THE DIRECTION TO FAVOR CONTACT SHOWN PER LIMITS OF DRAWING SPECIFICATIONS. REVERSE IDLER ALSO TO HAVE MODIFIED PRESSURES TO PRODUCE CONTACTS AS SHOWN.… | ||
| img274 | Blueprint from Cadillac Motor Car Co. showing gear tooth contact and rotation direction. | ||
| View original record | 83 FOR EXPERIMENTAL WORK ONLY 890401 SILVER 2 - 1935 -COAST DRIVING SIDES NOTE--DRIVING SIDES TO HAVE FULL CONTACT OR SHADING HEAVIER UPWARD. DRIVEN SIDES TO HAVE FULL CONTACT OR SHADING HEAVIER… | ||
| img275 | Letter to Cadillac Motor Co. regarding the poor performance and friction issues of tested Marles Steering Gears. | ||
| View original record | Exptl. Dept. Hs/PJH.24/KW. 29th May, 1935. M. Olley, Esq., c/o. The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Sir, We have recently tried on two of our large cars double tooth Marles… | ||
| img276 | Letter inquiring about the theory of friction and the crowning of tracks. | ||
| View original record | -2- HA/PJH.24/KW.29.5.35. We should be very grateful if you could tell us whether there is anything in our theory re the friction and whether the crowning of the tracks is necessary, and if so, to… | ||
| img277 | Letter from Cadillac describing their method and advantages for conducting torsional tests for frame stiffness. | ||
| View original record | oy CADILLAC - LA SALLE MOTOR CARS CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN July 2, 1935. GRY W. A. Robotham, Esq., Rolls-Royce, Limited, Derby, England. My dear Rm: Think I will send you enclosed… | ||
| img278 | Procedure for the torsional stiffness testing of a vehicle frame. | ||
| View original record | -2- It is weighted sufficiently to give a twist of say 2½ to 3½ degrees either side of center without lifting at any corner. We start off by loading one scale with say 1250 lbs and the other with 50… | ||
| img279 | Frame and body stiffness tests, with comparative data from a 1935 Ford Sedan and a 1934 Olds 8 Sedan. | ||
| View original record | -3- Modern American practice does not rely on the frame alone for this result. Take for instance the 1935 Ford Sedan: Between Wheels D to R F to D Bare Frame: 475 565 2970 Note: Fr Wheels to Dash is… | ||
| img280 | Technical discussion on vehicle frame stiffness for sedan and soft-top models, comparing different construction methods and their effects. | ||
| View original record | -4- ties of the job are clear. The picture we get from all this is:- (1) Sedan jobs. (Metal frame and roofs). It is desirable and entirely practical to eliminate the frame entirely. We should have no… | ||
| img281 | Concluding page of a letter or report signed by Maurice Olley. | ||
| View original record | -5- I hope these notes will be useful to you and that your "reposte" will be useful to me. Kindest regards to Mrs. Em and yourself. Maurice Olley [Signature: Maurice Olley] M. Olley H | ||
| img282 | Hand-drawn graph comparing frame stiffness and resonance against frequency and amplitude. | ||
| View original record | Amplitude A: original frame B: first stiffening. much worse. C: further stiffening. Equal to original. D: improved frame. Frequency wheel hop frequency - 540 v/min Frame Stiffness & Resonance Olley… | ||
| img283 | Diagram illustrating the method for testing the torsional rigidity of a vehicle frame. | ||
| View original record | 11 Method for testing torsional rigidity of rear end of frame with independent front end. Channel irons are used in place of rear springs. Load is applied at plane of rear wheel centres. This method… | ||
| img284 | Diagram illustrating the third method for the torsional rigidity test of a frame. | ||
| View original record | I DASH FR WL PLANE Torsional Rigidity Test of Frame Third Method HIL-TON- 4/5/25 | ||
| img285 | Graph plotting Lbs. Feet against Degrees from the 3rd test of a Chrysler Impl component with DRS closed. | ||
| View original record | CHRYSLER IMPL 3RD TEST DRS CLOSED 3700 - 7950 - 6950 In 128 1/2" Deffee In 85 5/8" LBS. FEET DEGREES 3700 #/in 6950 #/in 7950 .890 .475 .415 IBG July 25/34 | ||
| img286 | Cover note forwarding a copy of a note from 'Oy' for action. | ||
| View original record | To E. c. to By. Hs/Rn.7/KW.16.7.35. Herewith is a copy of a note from Oy. We are working on the points that he mentions. Hs/Rn: Att: Letter from Oy. dated 28.6.35: | ||
| img287 | Letter from Cadillac Motor Car Company regarding steering gear characteristics and comparisons. | ||
| View original record | CADILLAC MOTOR CAR COMPANY CADILLAC AND LASALLE MOTOR CARS DETROIT, MICHIGAN June 28, 1935. Mr. W. A. Robotham, Rolls Royce, Limited, Derby, England. Dear RM: Replying to Mr. Hardy's letter of May 29,… | ||
| img288 | Analysis of wheel fight and the causes of low-speed wabble, including testing methods. | ||
| View original record | -2- (4) Not only this, but the stiffness is "critical". That is 10% increase in stiffness may, in certain conditions, just turn the corner, and give complete freedom from wheel fight. (5) We think… | ||
| img289 | Technical letter detailing the causes and cures for wheel wabble and wheel fight. | ||
| View original record | -5- (6) Continued: (a) Continued: (4) Continued: When wabble occurs they run at the same frequency, but a phase difference exists between them such that the road feeds energy into the wabble and the… | ||
| img290 | Letter to Cadillac discussing frame stiffness, sending test results, and asking for an opinion on cross-member positioning. | ||
| View original record | Exptl. Dept. Hs/Gry.16/KW. 27th August, 1935. M. Olley, Esq., c/o. The Cadillac Motor Co., Detroit, Michigan, U.S.A. Dear Cy., Rn. gave me your letter about frame stiffness. I'm afraid I have been a… | ||
| img291 | Query regarding air locks and leakage in Delco shock dampers as used on the Cadillac V.16. | ||
| View original record | -2- Hs/Gry.16/KW.27.8.35. Leslie has asked me to enquire whether Delco have experienced a trouble with air locks on the top compression chamber with the Vertical piston shock damper as used on the… | ||
| img292 | Letter to M. Olley of Cadillac regarding colleagues visiting Detroit and requesting assistance. | ||
| View original record | Ey Exptl. Dept. Hs/Rm.6/KW. 31st October, 1935. M. Olley, Esq., The Cadillac Motor Car Co., Detroit, Michigan, U.S.A. Dear Cy, We were very sorry not to see you at Olympia. Da., whom you will remember… | ||
| img293 | Letter from Cadillac Motor Car Company regarding the Phantom III chassis and wishbone suspension. | ||
| View original record | CADILLAC MOTOR CAR COMPANY DETROIT, MICHIGAN CADILLAC AND LA SALLE MOTOR CARS November 12, 1935. Mr. W. A. Robotham, Rolls-Royce, Limited, Derby, England. Dear Rm: Thanks for your note of October 21.… | ||
| img294 | Letter to the Cadillac Motor Car Company regarding manufacturing, the Phantom III, and Girling Brakes. | ||
| View original record | oy Exptl. Dept. HS/Rm.7/KW. 27th November, 1935. M. Olley, Esq., The Cadillac Motor Car Company, Detroit, Michigan, U.S.A. Dear Cy, Thank you for your letter of November 12th. I need hardly say how… | ||