| Description | Date | Identifier | |
| Report from the USA discussing car suspension systems, comparing Chrysler's Air Flow system to those from GM, Mercedes, and Chevrolet. | 19th Feb 1934 | Box 173 \ 1 img342 | |
| Technical comparison of Cadillac, Packard, and Buick suspension, and a discussion of Chrysler's conventional and automatic gearboxes. | 19th Feb 1934 | Box 173 \ 1 img343 | |
| Chrysler transmission developments, steering shocks, and a comparison of American engine weights. | 19th Mar 1934 | Box 173 \ 1 img344 | |
| Cadillac starter and vacuum control, Chrysler spring anti-friction plates, and Bentley steering performance in cold weather. | 19th Feb 1934 | Box 173 \ 1 img345 | |
| Specifications and test results for vehicle suspension and steering adjustments. | 19th Feb 1934 | Box 173 \ 1 img346 | |
| Analysis of Chrysler's 'air flow' models, focusing on independent suspension, ride quality, and weight distribution. | 19th Feb 1934 | Box 173 \ 1 img347 | |
| Chrysler's engine, transmission, brake, and valve seat technology. | 19th Feb 1934 | Box 173 \ 1 img348 | |
| Chrysler's 'air flow' independent suspension system, detailing its weight distribution, spring ratings, and ride characteristics. | 19th Feb 1934 | Box 173 \ 1 img349 | |
| Technical report on front spring design, engine specifications for six and eight-cylinder models, and transmission systems. | 19th Feb 1934 | Box 173 \ 1 img350 | |
| Brake and valve seat components, with observations on Chrysler's suspension technology. | 19th Feb 1934 | Box 173 \ 1 img351 | |
| The road performance of various American cars, with a comparison of V-type and inline-eight engines. | 19th Feb 1934 | Box 173 \ 1 img352 | |
| Comparison of 8-cylinder engines on characteristics such as smoothness, silence, weight, and installation convenience. | 19th Feb 1934 | Box 173 \ 1 img353 | |
| Analysis comparing inline-8 and V8 engines, referencing competitor models and market strategy. | 19th Feb 1934 | Box 173 \ 1 img354 | |
| Report comparing the ride quality of Cadillac, Buick, and Pontiac cars. | 19th Feb 1934 | Box 173 \ 1 img355 | |
| Comparison of American cars with their own products, focusing on handling and mechanical noise. | 19th Feb 1934 | Box 173 \ 1 img356 | |
| Report discussing the G.M. scheme, hydraulic lash adjusters, and vacuum servo brakes. | 19th Feb 1934 | Box 173 \ 1 img357 | |
| Memo discussing stelliting valves, independent wheel suspension, supercharging, and six-cylinder engines. | 19th Feb 1934 | Box 173 \ 1 img358 | |
| The future plans for a car model referred to as 'the Six'. | 4th Feb 1933 | Box 173 \ 1 img359 | |
| Letter regarding the Vulture engine, American cars, and engine specifications. | 4th Feb 1933 | Box 173 \ 1 img360 | |
| US travel itinerary and comparing the performance of a V8 Ford to a Bentley. | 4th Feb 1933 | Box 173 \ 1 img361 | |
| Comparing straight-eight, V8, and six-cylinder engines, clutches, and competitor models. | 19th Feb 1934 | Box 173 \ 1 img362 | |
| The road performance of American cars, comparing various 1933 and 1934 models including Vee and Line eight engines. | 19th Feb 1934 | Box 173 \ 1 img363 | |
| Comparative analysis of straight-eight and V-eight engine designs, discussing silence, weight, installation, cost, and power. | 19th Feb 1934 | Box 173 \ 1 img364 | |
| Technical review and comparison of the ride and mechanical qualities of 1930s American cars. | 19th Feb 1934 | Box 173 \ 1 img365 | |
| Considerations on various automotive topics including brakes, valves, suspension and engines. | 19th Feb 1934 | Box 173 \ 1 img366 | |
| Letter discussing the Vulture engine, American car competition, and comparative performance of a Ford against a Bentley. | 19th Feb 1934 | Box 173 \ 1 img367 | |
| Engineering opinion on the performance and reliability of Textolite timing gears, based on an investigation at Buick. | 4th Feb 1934 | Box 173 \ 1 img368 | |
| Comparing gear wear on different engines and detailing a 4-step gear production method. | 4th Feb 1934 | Box 173 \ 1 img369 | |
| Manufacturing and inspection notes for engine gears and crankshaft components. | 4th Feb 1934 | Box 173 \ 1 img370 | |
| The general position and technical specifications of Buick vehicles. | 4th Feb 1934 | Box 173 \ 1 img371 | |
| American car features including steering, brakes, charging, engine mounting, and Buick's weight reduction. | 19th Feb 1934 | Box 173 \ 1 img372 | |
| Investigation into Textolite timing gears used by Buick, covering engineering opinions and production methods. | 19th Feb 1934 | Box 173 \ 1 img373 | |
| Manufacturing and inspection procedures for gears, erection specifications, and comments on Buick engineering. | 19th Feb 1934 | Box 173 \ 1 img374 | |
| Technical analysis of competitor vehicles, focusing on engine, steering, and braking systems. | 19th Feb 1934 | Box 173 \ 1 img375 | |
| Telegram recommending the procurement of a hall grinding head and investigating aero cylinders. | 17th Feb 1934 | Box 173 \ 1 img376 | |
| Telegram received by telephone regarding grinding equipment, supercharging, and costs for different chassis types. | 1st Feb 1934 | Box 173 \ 1 img377 | |
| Telegram regarding unsuitable aero cylinders and a return trip to Indianapolis. | 10th Mar 1933 | Box 173 \ 1 img378 | |
| Cables received from the USA regarding engine components, costs, and test results. | 19th Feb 1934 | Box 173 \ 1 img379 | |
| Telegram from Detroit regarding the cost of a Cadillac and adopting Buick's thermostat technology. | 16th Feb 1934 | Box 173 \ 1 img380 | |
| Telegram message regarding vehicle shake during an endurance test. | 10th Jul 1933 | Box 173 \ 1 img381 | |
| Telegram received by telephone detailing issues with independent suspension, frame frequency and steering. | 10th May 1933 | Box 173 \ 1 img382 | |
| Telegram message regarding added inertia and measuring frequency. | 10th May 1939 | Box 173 \ 1 img383 | |
| Telegram message received by telephone with component specifications. | 16th Feb 1934 | Box 173 \ 1 img384 | |
| Western Union cablegram from Detroit comparing Cadillac and Buick features and costs. | 16th Feb 1934 | Box 173 \ 1 img385 | |
| Cablegram message discussing modifications to steering and frame stability, referencing a Terraplane design. | 1st Feb 1941 | Box 173 \ 1 img386 | |
| Two cables from the U.S.A. discussing competitor car analysis, including Cadillac and Buick. | 19th Feb 1934 | Box 173 \ 1 img387 | |
| Night letter cable with instructions for parts for Kestrel and Goshawk engines. | 19th Feb 1934 | Box 173 \ 1 img388 | |
| Night letter cable to New York regarding a Cadillac car required for testing. | 19th Feb 1934 | Box 173 \ 1 img389 | |
| Note about obtaining peak and average glycol temperatures for Curtis and Hives. | 19th Feb 1934 | Box 173 \ 1 img390 | |
| Cablegram recommending the purchase of a Hall grinding head for investigating an aero cylinder problem. | 17th Feb 1934 | Box 173 \ 1 img391 | |
| Cablegram recommending the purchase of valveseat grinding equipment for chassis cylinders. | 17th Feb 1934 | Box 173 \ 1 img392 | |
| Cablegram reporting on the successful resolution of bearing difficulties following a satisfactory test. | 17th Jan 1949 | Box 173 \ 1 img393 | |
| Cablegram concerning the testing of grooved bearings and the despatch of replacements. | 1st Mar 1943 | Box 173 \ 1 img394 | |
| Cablegram regarding inability to produce marine bearings and recommending Allison to produce Kestrel main bearings. | 1st Mar 1943 | Box 173 \ 1 img395 | |
| Cables received from RHO in the U.S.A regarding equipment and engine tests. | 19th Feb 1934 | Box 173 \ 1 img396 | |
| Purchase of American cars for comparative analysis. | 16th Feb 1934 | Box 173 \ 1 img397 | |
| The purchase of American cars for comparison, discussing engine cylinder count and connecting rod stroke ratios. | 17th Feb 1934 | Box 173 \ 1 img398 | |
| Logistics and financial considerations of purchasing a 16-cylinder Cadillac. | 19th Feb 1934 | Box 173 \ 1 img399 | |
| Bearing tests comparing Allison Engineering Company bearings with those produced at the Derby factory, including recommendations. | 2nd Feb 1934 | Box 173 \ 1 img400 | |
| Performance of lead bronze bearings and future manufacturing plans for a liquid-cooled engine. | 2nd Feb 1934 | Box 173 \ 1 img401 | |
| Design considerations for connecting rods and cylinders, referencing Condor and Curtis types. | 2nd Feb 1934 | Box 173 \ 1 img402 | |
| Rough sketch proposing a solid forked type connecting rod design with handwritten annotations. | 2nd Feb 1934 | Box 173 \ 1 img403 | |
| Comparative tests of lead bronze main bearings from Allison and Rolls-Royce. | 2nd Feb 1934 | Box 173 \ 1 img404 | |
| Page with handwritten instructions regarding bearing modifications and test data observations. | 30th Jan 1934 | Box 173 \ 1 img405 | |
| Measurement data for Allison Center Main bearings and shaft before and after a test. | 30th Jan 1934 | Box 173 \ 1 img406 | |
| Pre-test measurement report for bearings and crankshaft journals. | 1st Feb 1934 | Box 173 \ 1 img407 | |
| Test report detailing the performance and eventual seizure of a bearing under varying RPMs and loads. | 1st Feb 1934 | Box 173 \ 1 img408 | |
| Test report data for Allison bearings. | 6th Feb 1934 | Box 173 \ 1 img409 | |
| Experiences with aluminium connecting rods and pistons, referencing Cadillac, Franklin, and Bentley models. | 6th Feb 1934 | Box 173 \ 1 img410 | |
| Technical note on clutch and suspension design, comparing with American automotive practices. | 6th Feb 1934 | Box 173 \ 1 img411 | |
| Suspension deflection and a comparative analysis of Packard's engines, suspension, and testing standards. | 6th Feb 1934 | Box 173 \ 1 img412 | |
| Packard engine tests, crankshaft specifications, and balancing procedures. | 6th Feb 1934 | Box 173 \ 1 img413 | |
| Memo discussing engine balance, crankshaft dampers, and sourcing a specific type from a London supplier. | 6th Feb 1934 | Box 173 \ 1 img414 | |
| And a diagram on the design and performance of a 12-cylinder gearbox, detailing gear teeth and synchro mesh. | 6th Feb 1934 | Box 173 \ 1 img415 | |
| Vehicle components including the dashboard, clutch, weights, and engine mounting. | 6th Feb 1934 | Box 173 \ 1 img416 | |
| With sketches analyzing a Packard V8 engine mounting system. | 6th Feb 1934 | Box 173 \ 1 img417 | |
| Line 8-cylinder engine design, with details of a Cadillac La Salle crankshaft. | 6th Feb 1934 | Box 173 \ 1 img418 | |
| Technical note discussing engine component design, including crank cases and manifolding, with comparisons to American manufacturers. | 6th Feb 1934 | Box 173 \ 1 img419 | |
| Analysis of engine induction systems and performance, comparing American and Bentley designs. | 6th Feb 1934 | Box 173 \ 1 img420 | |
| Notes on La Salle engine performance and an analysis of torsional vibrations in Vee 8 and Line 8 crankshafts, noting fractures at high RPM. | 19th Feb 1934 | Box 173 \ 1 img421 | |
| Report from the USA on American car components including connecting rods, pistons, and clutches. | 19th Feb 1934 | Box 173 \ 1 img422 | |
| Report from the USA discussing developments in aluminium connecting rods, pistons, and clutches. | 19th Feb 1934 | Box 173 \ 1 img423 | |
| Suspension performance and competitor analysis, specifically mentioning Packard and Cadillac. | 19th Feb 1934 | Box 173 \ 1 img424 | |
| Notes on crankshaft specifications, balancing, crank dampers, and gearbox design. | 19th Feb 1934 | Box 173 \ 1 img425 | |
| Technical notes on gearbox synchromesh, dashboard insulation, clutch, and component weights. | 19th Feb 1934 | Box 173 \ 1 img426 | |
| Packard's engine mounting system with a comparison to Chrysler's design. | 19th Feb 1934 | Box 173 \ 1 img427 | |
| Analysis of American engine design, specifically crankshafts and crankcases, with recommendations for Bentley models. | 19th Feb 1934 | Box 173 \ 1 img428 | |
| Technical memorandum on manifolding and torsional vibrations, with comparative engine performance data. | 10th Feb 1934 | Box 173 \ 1 img429 | |
| Performance and benefits of ethylene glycol cooling in Kestrel aero engines. | 20th Feb 1934 | Box 173 \ 1 img430 | |
| Letter page requesting information on aircraft engine cooling systems and performance parameters for various engine types. | 20th Feb 1934 | Box 173 \ 1 img431 | |
| Cablegram from Detroit discussing the import of a Cadillac, a Terraplane, and a supercharger. | 17th Feb 1934 | Box 173 \ 1 img432 | |
| Cable detailing electrical supply specifications for Coverley, Spink Arms in Indianapolis, U.S.A. | 20th Feb 1934 | Box 173 \ 1 img433 | |
| Telegram received by telephone regarding a broken valve set after five hundred miles. | 19th Feb 1934 | Box 173 \ 1 img434 | |
| Cablegram reporting the failure of two new valve springs after 500 miles. | 20th Feb 1934 | Box 173 \ 1 img435 | |
| Letter discussing Terraplane engine vibration tests and seeking comparative information from General Motors. | 10th Jan 1934 | Box 173 \ 2 img001 | |
| Engineering memorandum on the analysis of used Mobiloil 'EP' and deposits from a Bentley 3½-Litre car gearbox. | 29th Dec 1933 | Box 173 \ 2 img002 | |
| Letter from Vacuum Oil Company regarding boiled linseed oil coatings on gearbox and axle housings and the formation of deposits. | 29th Dec 1933 | Box 173 \ 2 img003 | |
| And comparing various designs for independent front wheel suspension systems. | 17th Jan 1934 | Box 173 \ 2 img004 | |
| Diagrams and text discussing the function of projecting spring boxes for buffering. | 17th Jan 1934 | Box 173 \ 2 img005 | |
| Short trial of independent front springing on a Phantom (27-EX), noting issues with steering, noise and suspension geometry. | 15th Jan 1934 | Box 173 \ 2 img006 | |
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