| Description | Date | Identifier | |
| Causes of fender shake and high-speed wobble on drums. | 11th Feb 1931 | Box 170 \ 2 img009 | |
| Letter from Cadillac to E.W. Hives discussing technical details on steels, engine valves, dampers, and shock absorbers. | 11th Feb 1931 | Box 170 \ 2 img010 | |
| Technical analysis of vehicle riding quality, comparing Cadillac, Packard, and Rolls-Royce models. | 11th Feb 1931 | Box 170 \ 2 img011 | |
| Letter from M. Olley discussing axle qualities, braking issues, thermostat control, and V-12 engines. | 28th Feb 1938 | Box 170 \ 2 img012 | |
| Comparing performance data (M.P.H vs R.P.M) with a Maybach engine. | 28th Feb 1938 | Box 170 \ 2 img013 | |
| Letter to M. Olley of Cadillac Motor Car Co. discussing steel, shock absorbers, and Maybach cars. | 20th Mar 1931 | Box 170 \ 2 img014 | |
| Letter discussing competitor gearbox technology, market conditions, and two attached reports. | 2nd Mar 1931 | Box 170 \ 2 img015 | |
| Letter from Cadillac Motor Car Company discussing vehicle shimmy and fender shake under various conditions. | 16th Mar 1931 | Box 170 \ 2 img016 | |
| Page 2 of a letter from Maurice Olley regarding fender shake and Delavaud construction. | 1st Apr 1931 | Box 170 \ 2 img017 | |
| Letter to The Cadillac Motor Car Co. inquiring about the material used for cast iron brake drums in America. | 1st Apr 1931 | Box 170 \ 2 img018 | |
| Letter to Cadillac Motor Car Co. regarding axle movement experiments and shock absorber characteristics. | 14th Apr 1931 | Box 170 \ 2 img019 | |
| Letter from Cadillac Motor Car Company discussing an analysis of Delco shock absorbers. | 16th Apr 1931 | Box 170 \ 2 img020 | |
| To Mr. E. W. Hives discussing technical issues with shock absorbers, including back pressure, temperature, and frequency variation. | 16th Apr 1931 | Box 170 \ 2 img021 | |
| Graph of engine compression curves at variable speeds and strokes. | 16th Apr 1931 | Box 170 \ 2 img022 | |
| Blueprint detail showing specifications for '4630 COMPRESSION'. | 7th May 1931 | Box 170 \ 2 img023 | |
| Blueprint comparing 4 inch and 7 inch stroke designs with associated measurements. | 7th May 1931 | Box 170 \ 2 img024 | |
| Blueprint comparing different stroke lengths for standard and short stems. | 2nd Apr 1931 | Box 170 \ 2 img025 | |
| Blueprint drawing for a narrow gauge or template with handwritten annotations and dimensions. | 2nd Feb 1921 | Box 170 \ 2 img026 | |
| Design drawing for a piston, showing dimensions and valve timing information. | 2nd Apr 1917 | Box 170 \ 2 img027 | |
| Blueprint drawing for a half-size 'Valve D' component with three dimensioned views. | 2nd Feb 1921 | Box 170 \ 2 img028 | |
| Letter to Cadillac inquiring about synchro mesh gearbox and steering shock technologies. | 22th Apr 1931 | Box 170 \ 2 img029 | |
| Letter to M. Olley Esq. discussing suspension, frame stiffness ('jellying'), and steering components on various vehicles including the Buick and Phantom II. | 22th Apr 1931 | Box 170 \ 2 img030 | |
| Letter discussing vehicle frame stiffness, component mounting, and competitor car performance. | 3rd Apr 1931 | Box 170 \ 2 img031 | |
| Letter from Cadillac Motor Car Company discussing cast iron brake drums and providing a preferred material specification. | 3rd Apr 1931 | Box 170 \ 2 img032 | |
| Observations on surface cracking and wear of molybdenum alloy drums. | 3rd Apr 1931 | Box 170 \ 2 img033 | |
| For high and low-speed radiator and bonnet comparison tests at Brooklands. | 27th Apr 1931 | Box 170 \ 2 img034 | |
| Letter from Cadillac requesting test samples of RR50 aluminum alloys for pistons. | 27th Apr 1931 | Box 170 \ 2 img035 | |
| Letter to Cadillac discussing gearbox development, including tests of Maybach jaws, synchromesh systems, and quiet helical gears. | 4th May 1931 | Box 170 \ 2 img036 | |
| Letter discussing Cadillac and Buick cars, magnetos, steering, and business conditions. | 4th May 1931 | Box 170 \ 2 img037 | |
| Letter from Cadillac Motor Car Company discussing the performance and testing of Delco shock absorbers. | 12th May 1931 | Box 170 \ 2 img038 | |
| Technical analysis of competitor synchro-mesh gearboxes and steering systems, including those from Buick and General Motors. | 12th May 1931 | Box 170 \ 2 img039 | |
| Vehicle dynamics, frame stiffness, 'fender shake', and the development of a 'shaker' for testing. | 12th May 1931 | Box 170 \ 2 img040 | |
| Letter discussing vehicle chassis dynamics, specifically axle tramp, frame weave, damping, and stiffness. | 15th May 1931 | Box 170 \ 2 img041 | |
| Discussion comparing epicyclic and synchro-mesh gearbox designs, with reference to a Buick implementation. | 15th May 1931 | Box 170 \ 2 img042 | |
| Gearbox design, comparing 3-speed vs 4-speed, synchromesh, and gear manufacturing processes. | 15th May 1931 | Box 170 \ 2 img043 | |
| Notes on gear lapping processes, gear production machines, and specifications for helical gears. | 15th May 1931 | Box 170 \ 2 img044 | |
| Letter discussing crankshaft balancers, ignition equipment, and asking questions about alloys and chassis design. | 15th May 1931 | Box 170 \ 2 img045 | |
| Letter to Cadillac Motor Car Co. with a sketch of an apparatus for measuring pressure curves. | 23th May 1931 | Box 170 \ 2 img046 | |
| Report discussing back pressure, inter-leaf friction, temperature and frequency variation in a shock absorber or damper. | 23th May 1931 | Box 170 \ 2 img047 | |
| Details on the design of an indicator cylinder and bumper test procedure for a shock absorber. | 29th May 1931 | Box 170 \ 2 img048 | |
| American automotive practices, including various engine designs and gearbox technologies. | 29th May 1931 | Box 170 \ 2 img049 | |
| Letter discussing the principles and performance of different shock absorber valves. | 12th Jun 1931 | Box 170 \ 2 img050 | |
| Letter to Cadillac discussing Packard's adoption of a harmonic stabilizer and a dashpot type synchro mesh. | 2nd Jul 1931 | Box 170 \ 2 img051 | |
| Letter to Cadillac requesting technical information on bumper rigs, crankshaft dampers, inlet valves, and balance weights. | 21th Jul 1931 | Box 170 \ 2 img052 | |
| Request for information about a Buick-type torsional vibration damper for a 25 HP car. | 20th Jul 1931 | Box 170 \ 2 img053 | |
| Letter of introduction for Mr. Kaye Don, driver of the 'Miss England' motorboat, to M. Olley of Cadillac Motor Co. | 10th Aug 1931 | Box 170 \ 2 img054 | |
| Letter to Cadillac Motor Car Co. asking why American aero engine makers no longer use battery ignition. | 10th Aug 1931 | Box 170 \ 2 img055 | |
| Letter from Cadillac to W.A. Robotham discussing synchronizers and radiator mounting. | 13th Jul 1931 | Box 170 \ 2 img056 | |
| Page two of a letter signed by Maurice Olley regarding ride, road holding, and universal joint wear. | 24th Mar 1932 | Box 170 \ 2 img057 | |
| Letter to Cadillac Motor Car Co. regarding steering, carburetter despatch, and quiet centrifugal superchargers. | 24th Mar 1932 | Box 170 \ 2 img058 | |
| Letter to Cadillac Motor Car Co. regarding an S.U. carburetter from a 6-litre Bentley and an inquiry about exhaust system materials. | 2nd Apr 1932 | Box 170 \ 2 img059 | |
| The despatch and invoicing of a S.U. carburetter to Cadillac Motor Car Co. | 2nd Apr 1932 | Box 170 \ 2 img060 | |
| Letter to Cadillac Motor Car Co. regarding radiator cap pressure and a crankshaft testing rig. | 12th Apr 1932 | Box 170 \ 2 img061 | |
| Letter from Cadillac Motor Car Company regarding a sample S.U. carburettor and shock absorber design. | 28th Apr 1932 | Box 170 \ 2 img062 | |
| Letter to Cadillac inquiring about automatic tappet adjustment and synchro mesh technology. | 5th May 1932 | Box 170 \ 2 img063 | |
| Pre-paid cable to Cadillac Motor Car Company inquiring about the use of synchro-mesh gears by manufacturers. | 5th May 1932 | Box 170 \ 2 img064 | |
| Correspondence with Cadillac regarding a carburetter bill, car figures, and superchargers. | 7th May 1932 | Box 170 \ 2 img065 | |
| Telegram discussing issues with a four-speed transmission and synchro mesh clutches. | 10th May 1932 | Box 170 \ 2 img066 | |
| Letter from Cadillac Motor Car Company providing experience and feedback on synchromesh transmissions. | 25th May 1932 | Box 170 \ 2 img067 | |
| Letter discussing four-speed gearboxes, synchronizers, silent gears, and the 'monkey clutch'. | 1st Jun 1932 | Box 170 \ 2 img068 | |
| Suggesting an order be passed to the Cadillac Motor Car Co. for a steering column. | 24th Jun 1932 | Box 170 \ 2 img069 | |
| Letter to Cadillac Motor Car Co. requesting a steering column and box for testing on a Phantom II. | 24th Jun 1932 | Box 170 \ 2 img070 | |
| Blueprint sketch with dimensions for the steering column of a Phantom II chassis. | 25th Jun 1932 | Box 170 \ 2 img071 | |
| Poor steering on the P.2 model and requesting a Cadillac steering assembly for evaluation. | 1st Jun 1932 | Box 170 \ 2 img072 | |
| Letter from Cadillac Motor Car Company regarding the dispatch and technical specifications of a steering gear. | 30th Aug 1932 | Box 170 \ 2 img073 | |
| Letter from Maurice Olley discussing steering gear design, efficiency, and road handling characteristics. | 17th Sep 1932 | Box 170 \ 2 img074 | |
| Letter to Cadillac Motor Co. discussing steering gear comparisons, power output, and performance of automatic tappet adjustment. | 17th Sep 1932 | Box 170 \ 2 img075 | |
| Issues with petrol pumps, carburetors, and adjustable tappets. | 9th Dec 1932 | Box 170 \ 2 img076 | |
| Letter to M. Olley of Cadillac discussing factory activity, the Harrison Radiator Block, rear-engine motorcars, and supercharging experiments. | 9th Dec 1932 | Box 170 \ 2 img077 | |
| Letter regarding Mr. Lovesey's trip to America with Sir Malcolm Campbell. | 9th Dec 1932 | Box 170 \ 2 img078 | |
| Letter to M. Olley of Cadillac discussing business conditions, car sales, the Bentley acquisition, and plans for a new Bentley model. | 3rd Jan 1933 | Box 170 \ 2 img079 | |
| Car development projects, updates on the 18 HP and Phantom II models, and a personnel assignment to the USA. | 3rd Jan 1933 | Box 170 \ 2 img080 | |
| Letter discussing a visit to the U.S.A, aero-engines, the health of Sir Henry, and a future report. | 1st Jan 1933 | Box 170 \ 2 img081 | |
| Letter to M. Olley of The Cadillac Motor Car Co. enclosing a report on the Dubonnet car. | 4th Jan 1933 | Box 170 \ 2 img082 | |
| Letter to M. Olley of Cadillac Motor Car Co. responding to queries about the Burney rear-engine car and independent rear wheel systems. | 17th Aug 1931 | Box 170 \ 2 img083 | |
| Letter to M. Olley Esq. discussing the performance and characteristics of various car suspension systems. | 28th Aug 1931 | Box 170 \ 2 img084 | |
| Favourable feedback on the Phantom II's springing from a critic with experience at Cadillac. | 28th Aug 1931 | Box 170 \ 2 img085 | |
| Letter from Cadillac Motor Car Company regarding an introduction, battery ignition, and a Phantom II vehicle. | 20th Aug 1931 | Box 170 \ 2 img086 | |
| Letter to Cadillac Motor Car Co. discussing market conditions and requesting information on remote control hydraulics. | 15th Sep 1931 | Box 170 \ 2 img087 | |
| Letter to M. Olley Esq. about the Schneider and Harmsworth Trophies and their relevance to the U.S. automobile industry. | 21th Jul 1931 | Box 170 \ 2 img088 | |
| Letter discussing the results of a bumper rig test on a car. | 21th Jul 1931 | Box 170 \ 2 img089 | |
| Body shells for load reproduction, vibration damping, and the balance of springs and dampers. | 21th Jul 1931 | Box 170 \ 2 img090 | |
| The principles of dampers, referencing Frahm anti-rolling tanks and suggesting adjustments for crank frequency. | 21th Jul 1931 | Box 170 \ 2 img091 | |
| Reflection on engine damper design and a discussion on the function of balance weights, with references to Lanchester and GM. | 21th Jul 1931 | Box 170 \ 2 img092 | |
| Letter discussing crankshaft design, masked valves, a motor race, and observations on the American motor industry. | 21th Jul 1931 | Box 170 \ 2 img093 | |
| Letter from Maurice Olley discussing changing market conditions and competitor performance. | 22th Aug 1931 | Box 170 \ 2 img094 | |
| Letter from Delco Aviation Corporation to Cadillac Motor Car Company regarding the history and use of battery ignition on aircraft engines. | 22th Aug 1931 | Box 170 \ 2 img095 | |
| Letter from Cadillac congratulating on the Schneider race and offering feedback on propeller shaft design. | 15th Sep 1931 | Box 170 \ 2 img096 | |
| Letter to Cadillac Motor Car Co. discussing calculations for the whirling speed of a Phantom II propeller shaft. | 1st Oct 1931 | Box 170 \ 2 img097 | |
| Engineering drawing of a splined cylindrical component with dimensional specifications. | 1st Oct 1931 | Box 170 \ 2 img098 | |
| Technical drawing detailing a cross-section of a worm gear with specific dimensions and machining notes. | 1st Oct 1931 | Box 170 \ 2 img099 | |
| Technical drawing of a component with a left-hand single thread. | 8th Dec 1931 | Box 170 \ 2 img100 | |
| Drawing for a left-hand worm steering gear with a 20:1 ratio. | 8th Dec 1931 | Box 170 \ 2 img101 | |
| Letter discussing damper orifice regulation and ride quality, including a graph of oil pressure versus velocity. | 18th Oct 1931 | Box 170 \ 2 img102 | |
| Suspension damping, orifice effects, and the phenomenon of 'boulevard jerk'. | 18th Oct 1931 | Box 170 \ 2 img103 | |
| Letter discussing suspension damping, orifice control, and ride comfort characteristics. | 19th Oct 1931 | Box 170 \ 2 img104 | |
| Letter from Cadillac Motor Car Company regarding the results of Bumping Rig tests on springs. | 19th Oct 1931 | Box 170 \ 2 img105 | |
| Page 2 of a letter from Cadillac Motor Car Company discussing vehicle testing results and issues. | 20th Oct 1931 | Box 170 \ 2 img106 | |
| Letter to Cadillac discussing post-Schneider race engine developments, including synchro-mesh gearboxes and fluid flywheels. | 20th Oct 1931 | Box 170 \ 2 img107 | |
| Letter discussing vehicle riding qualities, adjustable dampers, and the 'Miss England' racing boat. | 20th Oct 1931 | Box 170 \ 2 img108 | |
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