| Description | Date | Identifier | |
| Modifications to superchargers, engine positioning, clutch, gearbox, and fan arrangements. | 7th Jul 1932 | Box 178 \ 3 img263 | |
| Proposing an improvement to aero engine cylinder construction by using a 6-bolt arrangement. | 7th Jul 1932 | Box 178 \ 3 img264 | |
| Expressing dissatisfaction with the proposed indirect blower drive for an inverted engine. | 7th Jul 1932 | Box 178 \ 3 img265 | |
| Increasing aero engine speed and future development, including crankshaft hardening and cylinder construction. | 7th Jul 1932 | Box 178 \ 3 img266 | |
| Technical memorandum regarding the design of gearboxes for Bensport and Peregrine models. | 8th Jul 1932 | Box 178 \ 3 img267 | |
| List of technical notes regarding the design and assembly of gearbox components. | 29th Jul 1932 | Box 178 \ 3 img268 | |
| Revised design modifications for a Bentley 'B' bonnet and radiator. | 29th Jul 1932 | Box 178 \ 3 img269 | |
| Photographs of a Bentley 'B' model chassis with a body made by Park Ward. | 9th Jul 1932 | Box 178 \ 3 img270 | |
| Proposed modifications to the gearbox, brakes, carburetter, and crankshaft for the Peregrine engine. | 13th Jul 1932 | Box 178 \ 3 img271 | |
| Modifications and material changes for a single valve type shock damper, including a diagram. | 13th Jul 1932 | Box 178 \ 3 img272 | |
| Potential dynamo and charging system modifications for the 25HP model, weighing options like vibrator control. | 14th Jul 1932 | Box 178 \ 3 img273 | |
| Ordering and testing a Borg & Beck clutch to be fitted to the 25HP model. | 14th Jul 1932 | Box 178 \ 3 img274 | |
| Modification to the J.3. road shock dampers to increase damping by increasing the valve dashpot diameter. | 14th Jul 1932 | Box 178 \ 3 img275 | |
| Proposals for the design of controls on R-R and Bentley cars, including steering wheels. | 14th Jul 1932 | Box 178 \ 3 img276 | |
| Car dampers and special equipment for customers who drive at high speed or for events like the Alpine trials. | 14th Jul 1932 | Box 178 \ 3 img277 | |
| Potential causes for a piston failure and proposing further investigation. | 14th Jul 1932 | Box 178 \ 3 img278 | |
| Design conflicts between the supercharger drive, steering box, and chassis layout. | 15th Jul 1932 | Box 178 \ 3 img279 | |
| Design options for the Bentley steering wheel and controls, comparing Bluemell and Dover constructions. | 16th Jul 1932 | Box 178 \ 3 img280 | |
| Drawings and design modifications for the Bensport front axle and brakes. | 16th Jul 1932 | Box 178 \ 3 img281 | |
| Phone message confirmation regarding the performance of double valve shock dampers. | 18th Jul 1932 | Box 178 \ 3 img282 | |
| Specifications and requesting an alteration for a gear lever reverse stop spring. | 19th Jul 1932 | Box 178 \ 3 img283 | |
| Implementation of mixture and dimming controls on the steering column for Bensport and other models. | 19th Jul 1932 | Box 178 \ 3 img284 | |
| Scheme 3501 for Bensport rear brakes, including wheel options and riveting methods. | 20th Jul 1922 | Box 178 \ 3 img285 | |
| Confirming a phone message about the development and considerations of a compression ignition unit, specifically a 2-stroke, sleeve-type engine. | 21th Jul 1932 | Box 178 \ 3 img286 | |
| With observations on Bensport steering column controls, specifically the dipping device and mixture control. | 21th Jul 1932 | Box 178 \ 3 img287 | |
| Modifications to a Borg & Beck clutch on a 25HP model, including a new scheme and material suggestions. | 22th Jul 1932 | Box 178 \ 3 img288 | |
| Conference notes on the design and modification of a supercharged Bensport engine, including details on supercharger position, crankshaft and back axle. | 22th Jul 1932 | Box 178 \ 3 img289 | |
| Conference minutes detailing modifications and adjustments for the Peregrine car model. | 22th Jul 1932 | Box 178 \ 3 img290 | |
| Description of an oil leakage prevention method using glands and a Jubilee clip, with notes on a magnesium alloy cylinder casting. | 23th May 1932 | Box 178 \ 4 img001 | |
| Results of an engine acceptance and endurance test, including a failure analysis of a flexible drive. | 23th May 1932 | Box 178 \ 4 img002 | |
| Gearbox issues, experiments, and proposed solutions for gear change problems. | 23th May 1932 | Box 178 \ 4 img003 | |
| Blueprint detailing modifications for an evaporative cooling system on a Kestrel engine. | 8th Apr 1932 | Box 178 \ 4 img004 | |
| Blueprint showing an alternative evaporative cooling system with extra water pipe leads for a Kestrel engine. | 8th Apr 1932 | Box 178 \ 4 img005 | |
| Comparison between an existing and proposed new gland fitting to improve water flow for an evaporative cooling system on a 1B Kestrel engine. | 8th Apr 1932 | Box 178 \ 4 img006 | |
| Chassis wiring, the condition of existing cables, and retaining the current conduit system. | 1st Apr 1932 | Box 178 \ 4 img007 | |
| Tracking test comparing Bosch moulded insulation with standard bakelite for ignition coils. | 1st Apr 1932 | Box 178 \ 4 img008 | |
| Design and performance of the Bentley & Draper shock absorber. | 4th Apr 1932 | Box 178 \ 4 img009 | |
| Description of the design features and operation of the Bentley & Draper shock damper. | 5th Apr 1932 | Box 178 \ 4 img010 | |
| Misfiring at low speeds and the impact of spark plug gap size on slow running performance. | 5th Apr 1932 | Box 178 \ 4 img011 | |
| Violent flow reversal issues during tests of Gyrol clocks on a Whirlwind EA 10 engine. | 21th Nov 1941 | Box 178 \ 4 img012 | |
| Comparing the performance of a new coil versus an old coil with varying plug gaps. | 4th Apr 1932 | Box 178 \ 4 img013 | |
| Potential causes for engine misfiring, focusing on spark plug gaps, point erosion, and tungsten contact point oxidation. | 24th Nov 1920 | Box 178 \ 4 img014 | |
| Engine testing and the fitting of a completely mounted body for J.3. | 9th Apr 1934 | Box 178 \ 4 img015 | |
| Details and specifications for an Alfa-Romeo clutch. | 11th Apr 1932 | Box 178 \ 4 img016 | |
| Engine mounting modifications for the 89UL chassis, series N.2 onwards. | 11th Apr 1932 | Box 178 \ 4 img017 | |
| Agreement on a procedure for setting clearances on rubbers due to frame deflection from engine weight. | 11th Apr 1932 | Box 178 \ 4 img018 | |
| Investigation into high pressure in an engine's evaporative water cooling system and proposals for modifications. | 11th Apr 1932 | Box 178 \ 4 img019 | |
| Modifications to engine piping systems, including increasing pipe diameters and refining outlet connections under different schemes. | 11th Apr 1932 | Box 178 \ 4 img020 | |
| Tests and recommendations for modifying a cooling system to reduce pressure and prevent flow reversal. | 11th Apr 1932 | Box 178 \ 4 img021 | |
| Sending of an arrangement drawing for an Alfa Romeo clutch. | 13th Apr 1932 | Box 178 \ 4 img022 | |
| The investigation of engine cutting out trouble on Kestrel F/S engines at high altitudes and low temperatures. | 18th Apr 1932 | Box 178 \ 4 img023 | |
| Investigation into engine cutting out, focusing on petrol heating and ignition system performance at high altitude. | 12th Mar 1932 | Box 178 \ 4 img024 | |
| Analysis of high-altitude engine cut-out issues, comparing Antelope and Fury aircraft configurations and testing solutions. | 28th Nov 1932 | Box 178 \ 4 img025 | |
| Carburettor performance issues regarding fuel mixture, low temperatures, and potential solutions. | 26th Aug 1929 | Box 178 \ 4 img026 | |
| Missing Buick gearbox drawing and the dispatch of a Delco Buick damper with design notes. | 19th Apr 1932 | Box 178 \ 4 img027 | |
| Experimental work and solutions for a transmission vibration and rattle complaint. | 19th Apr 1932 | Box 178 \ 4 img028 | |
| Photograph of the latest Satellite gearbox, which has three synchro-mesh gears. | 26th Apr 1932 | Box 178 \ 4 img029 | |
| Sectional view and adjustment instructions for a Cadillac/LaSalle 'Triple-silent, Syncro-mesh' transmission. | 26th Apr 1932 | Box 178 \ 4 img030 | |
| Transmission disassembly instructions and a speedometer pinion selection chart. | 20th Apr 1932 | Box 178 \ 4 img031 | |
| Experimental items for the electrical system of the 19-EX, including a voltage-regulated dynamo, universal battery, and starter motor. | 20th Apr 1932 | Box 178 \ 4 img032 | |
| Tests and modifications to a starter motor, switch, horn, instruments, and windscreen wiper. | 1st Apr 1932 | Box 178 \ 4 img033 | |
| Modifications to the handstarter for 'Buzzard' engines to resolve an issue with the worm return spring. | 1st Apr 1932 | Box 178 \ 4 img034 | |
| Fitting a voltage-controlled dynamo to the 19-FX model for experience gathering. | 22th Apr 1932 | Box 178 \ 4 img035 | |
| Test report and specification list for the 19-EX car following a 10,000 miles post in France. | 22th Apr 1932 | Box 178 \ 4 img036 | |
| Updates and proposed changes to various vehicle components, including chassis, engine, and electrical systems. | 22th Apr 1932 | Box 178 \ 4 img037 | |
| Customer demand for, and testing of, permanent jacks for installation on cars. | 22th Apr 1932 | Box 178 \ 4 img038 | |
| The initial tests and modifications of a new semi-expanding carburetter, detailing performance, power output, and restarting issues. | 25th Apr 1932 | Box 178 \ 4 img039 | |
| Carburetter performance, focusing on issues with slow running, mixture control, noise, and building up. | 25th Apr 1932 | Box 178 \ 4 img040 | |
| Test conducted on a Kestrel VIM blower with its inlet guide vanes removed to assess performance impact. | 28th Feb 1932 | Box 178 \ 4 img041 | |
| Performance characteristics graph from rig tests of an 'R' supercharger with inlet guide vanes. | 8th Apr 1932 | Box 178 \ 4 img042 | |
| Performance graph plotting Horse-Power and Temperature Rise against Mass Flow Rate with vanes removed. | 13th Apr 1932 | Box 178 \ 4 img043 | |
| Technical memorandum comparing the coefficient of friction of an Alfa Romeo clutch to a Rolls-Royce clutch. | 25th Apr 1932 | Box 178 \ 4 img044 | |
| Performance of standard car sparking plugs and the testing of potential replacements. | 26th Apr 1932 | Box 178 \ 4 img045 | |
| The difficulty of changing into 3rd gear in a gearbox, detailing issues with resistance and cone synchronisation. | 28th Apr 1932 | Box 178 \ 4 img046 | |
| Gearbox and gear lever operational issues, including synchronisation problems and sticking cones. | 30th Apr 1922 | Box 178 \ 4 img047 | |
| Correction regarding the operation of helical gears, dog-clutch cones and jaw clutches. | 1st Nov 1936 | Box 178 \ 4 img048 | |
| Series of experiments concerning piston bedding and cylinder liner distortion on Kestrel engines. | 27th Apr 1932 | Box 178 \ 4 img049 | |
| Analysis of cylinder liner distortion and buckling based on tests with various crankcase and liner configurations. | 27th Apr 1932 | Box 178 \ 4 img050 | |
| Distortion issues leading to piston seizures and cylinder liner failures. | 27th Apr 1932 | Box 178 \ 4 img051 | |
| Comparative blueprint of a standard Kestrel cylinder liner and an improved type with a stiffened skirt. | 27th Apr 1932 | Box 178 \ 4 img052 | |
| Blueprint showing twelve different design proposals for engine cylinder liners. | 27th Apr 1932 | Box 178 \ 4 img053 | |
| Providing further particulars on B & D shock absorbers. | 27th Apr 1932 | Box 178 \ 4 img054 | |
| Analysis of a C.A.V.-Bosch shunt wound dynamo and regulator. | 1st Apr 1932 | Box 178 \ 4 img055 | |
| Performance tests of a machine, detailing its output capabilities and the unsteadiness of the regulator under hot conditions. | 27th Apr 1932 | Box 178 \ 4 img056 | |
| The road behaviour and faults found in a new limousine model following a short road test. | 29th Apr 1932 | Box 178 \ 4 img057 | |
| Continued list of design points needing immediate attention and areas for experimental work. | 29th Apr 1932 | Box 178 \ 4 img058 | |
| 3rd gear disengagement fault on the 40 HP Ghost chassis gearbox and the successful trial of a modified spline arrangement. | 5th May 1922 | Box 178 \ 4 img059 | |
| Blueprint diagram illustrating the operation of the 20/25 synchromesh system for top and 3rd gear. | 7th Mar 1932 | Box 178 \ 4 img060 | |
| Investigation into cylinder joint failures and high temperatures on evaporatively cooled Kestrel engines. | 7th Mar 1932 | Box 178 \ 4 img061 | |
| Continuation of a report on engine component testing, detailing failures of valves, plates, and joints under various boost and tightening conditions. | 26th Feb 1940 | Box 178 \ 4 img062 | |
| Cylinder block construction, discussing deflection, cooling, and joint face issues. | 20th Oct 1928 | Box 178 \ 4 img063 | |
| Returned valve and its fitting issues. | 28th Jan 1919 | Box 178 \ 4 img064 | |
| Blueprint detailing the placement of thermocouples in a cylinder head joint for an evaporative cooling system test. | 12th Apr 1932 | Box 178 \ 4 img065 | |
| Graph plotting cylinder head temperatures, BHP, and water temperatures against varying boost pressure at a constant speed. | 27th Apr 1932 | Box 178 \ 4 img066 | |
| Graph plotting Kestrel engine performance metrics including BHP, temperature, and fuel consumption against boost pressure. | 28th Apr 1932 | Box 178 \ 4 img067 | |
| Internal water leaks in Kestrel engines due to insufficient tightening of holding down nuts. | 16th Apr 1931 | Box 178 \ 4 img068 | |
| Proposal to use a slipping clutch spanner to ensure correct loading on cylinder joints and improve reliability. | 14th Apr 1932 | Box 178 \ 4 img069 | |
| Design and testing report for a dynamo drive on a Kestrel K.II M.S. 93 engine. | 31th May 1932 | Box 178 \ 4 img070 | |
| The unreliability of evaporative cooling systems in engines compared to water-cooled systems, detailing faults and proposed modifications. | 5th May 1932 | Box 178 \ 4 img071 | |
| The development challenges and future prospects of evaporatively cooled engines versus water-cooled systems. | 7th May 1932 | Box 178 \ 4 img072 | |
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