| Description | Date | Identifier | |
| Phantom II synchromesh gearbox issues, focusing on oil friction, torque, and gear engagement difficulties. | 7th May 1932 | Box 178 \ 4 img073 | |
| Testing plunger springs and alternatives for gear synchronization involving different cam angles and rollers. | 1st May 1932 | Box 178 \ 4 img074 | |
| Graph showing power losses due to 1st and 2nd motion shafts for a Phantom II Synchromesh system. | 1st May 1932 | Box 178 \ 4 img075 | |
| Graph showing power losses due to 1st and 2nd motion shafts for the 20/25 Synchromesh gearbox. | 7th May 1932 | Box 178 \ 4 img076 | |
| Performance and potential modifications of the synchro-mesh gearbox. | 7th May 1932 | Box 178 \ 4 img077 | |
| Standardisation sheet detailing alterations for the Kestrel G/1 Plunger Blown Piston. | 9th May 1932 | Box 178 \ 4 img078 | |
| Issues with the exhausted boost regulator aneroid and proposing a simplified version sealed at atmospheric pressure. | 11th May 1932 | Box 178 \ 4 img079 | |
| Test bed characteristic curve for a boost regulator with an aneroid sealed at atmospheric pressure, showing performance up to 12,000ft and return. | 19th May 1932 | Box 178 \ 4 img080 | |
| Sketch showing the layout of a generator drive for supercharge Kestrel engines. | 30th May 1935 | Box 178 \ 4 img081 | |
| Strip condition of a flexible drive and the functional testing of its associated electrical equipment. | 1st May 1932 | Box 178 \ 4 img082 | |
| Conclusions from tests on a dynamo drive, outlining its performance and proposals for future testing on the flexible drive and supercharger clutch. | 1st May 1932 | Box 178 \ 4 img083 | |
| Photograph showing an engine test rig with a large control panel in a workshop environment. | 1st May 1932 | Box 178 \ 4 img084 | |
| Close-up photograph of a universal joint and associated drive mechanism. | 1st May 1932 | Box 178 \ 4 img085 | |
| Photograph of a threaded and splined shaft assembly, with a handwritten note indicating the direction of rotation. | 2nd May 1932 | Box 178 \ 4 img086 | |
| Results and conclusions of various piston tests, noting scoring issues and proposing further investigation. | 2nd May 1932 | Box 178 \ 4 img087 | |
| Test report on piston development for the Buzzard evaporatively cooled engine. | 8th Jan 1932 | Box 178 \ 4 img088 | |
| The performance of Smith instruments, specifically the speedometer and clock, on the 20/25 chassis. | 13th May 1932 | Box 178 \ 4 img089 | |
| The testing and modification of various vehicle instruments including ammeters, petrol meters, and gauges. | 13th May 1932 | Box 178 \ 4 img090 | |
| The unsatisfactory lighting and glare from the instrument patch, affecting the driver's ability to read the gauges. | 11th May 1932 | Box 178 \ 4 img091 | |
| 2-hour acceptance test for a rebuilt and modified Ricardo sleeve valve engine following failure. | 18th May 1932 | Box 178 \ 4 img092 | |
| Engine endurance test detailing power output, cylinder detonation, piston and sleeve wear, and jointing material performance. | 18th May 1932 | Box 178 \ 4 img093 | |
| Analysis of engine detonation, comparing different cylinder constructions and valve types. | 18th May 1932 | Box 178 \ 4 img094 | |
| Continued note on the effect of sleeve and trapped water circulation on cylinder temperature. | 1st May 1932 | Box 178 \ 4 img095 | |
| General performance report on an engine unit, detailing horsepower, acceleration, and detonation characteristics. | 19th May 1932 | Box 178 \ 4 img096 | |
| Sending sketches of a modified brake layout for a J.III car. | 31th Dec 1932 | Box 178 \ 4 img097 | |
| Tests and proposed modifications to a synchromesh gearbox's 1st gear. | 23th May 1932 | Box 178 \ 4 img098 | |
| 6th order vibration characteristics and damping for a 12-cylinder V-engine. | 24th May 1932 | Box 178 \ 4 img099 | |
| Gearbox and sideshaft failure on a 25-EX left hand chassis. | 24th May 1932 | Box 178 \ 4 img100 | |
| Photograph showing a damaged 2nd motion shaft gear with a broken bolt and fractured retaining piece. | 24th May 1932 | Box 178 \ 4 img101 | |
| Photograph showing a fractured 2nd motion shaft continuous gear and a broken outer ball race from a 1st motion shaft. | 26th May 1932 | Box 178 \ 4 img102 | |
| Experiments using a modified dash pot to cure servo-brake thumps on the 20/25HP car. | 26th May 1932 | Box 178 \ 4 img103 | |
| The development of a differential valve for the Farnboro' indicator on an 'R' single cylinder unit. | 26th May 1932 | Box 178 \ 4 img104 | |
| Tests on a single-cylinder unit's valve, its reliability, and readiness for main engine tests. | 26th May 1932 | Box 178 \ 4 img105 | |
| Continued memo discussing modifications to a brake damper to prevent thump and clank noises. | 26th May 1932 | Box 178 \ 4 img106 | |
| Preliminary test run report on the Peregrine power unit, detailing crankshaft, valve gear, and lubrication observations. | 26th May 1932 | Box 178 \ 4 img107 | |
| Preliminary power curve tests and engine smoothness, with a postscript on tappet clearance experiments. | 28th May 1932 | Box 178 \ 4 img108 | |
| Wiring arrangement diagram for a RAE MK IV 1000 Watt generator for testing purposes. | 28th May 1932 | Box 178 \ 4 img109 | |
| Performance graph for a Peregrine 5.85 C/R engine, showing BHP, BMEP, and Induction Depression against RPM, with a valve timing diagram. | 28th May 1932 | Box 178 \ 4 img110 | |
| Graph plotting various engine performance curves, including B.M.E.P., induction, and compression pressures. | 28th May 1932 | Box 178 \ 4 img111 | |
| Blueprint showing a cross-section of a valve and fixed leak piston assembly. | 8th Apr 1932 | Box 178 \ 4 img112 | |
| Blueprint diagram of a Draper Shock Damper with component labels. | 8th Apr 1932 | Box 178 \ 4 img113 | |
| Use of bonnet shutters versus louvres for engine cooling. | 1st Oct 1931 | Box 179 \ 1 img001 | |
| The performance and issues observed with Mr. Sidgreaves' car, including suggestions for modifications. | 31th Oct 1931 | Box 179 \ 1 img002 | |
| Design, criticism, and testing of exhaust manifolds for various chassis types. | 13th Oct 1931 | Box 179 \ 1 img003 | |
| Schemes for rear springs and rear axle lubrication. | 1st Oct 1931 | Box 179 \ 1 img004 | |
| Development of a light 2-cycle compression ignition engine for Avro and other work, considering various design schemes. | 3rd Oct 1931 | Box 179 \ 1 img005 | |
| Cover letter regarding original documents for the J. 3. Dynamo Drive and Rear End of Crankcase. | 1st Oct 1931 | Box 179 \ 1 img006 | |
| The J.3 Crankshaft and Crankcase, sending a blueprint and detailing completed updates. | 3rd Oct 1931 | Box 179 \ 1 img007 | |
| The dynamo drive and timing wheel case, noting the lack of eccentric adjustment for the dynamo pinion centre. | 10th Jul 1921 | Box 179 \ 1 img008 | |
| Design of a thin web flywheel for the 'China' Chassis. | 1st Oct 1931 | Box 179 \ 1 img009 | |
| Durability tests for the J. 3. & 4. gearbox reverse gear and the design of the reverse wheel retention keys. | 6th Oct 1931 | Box 179 \ 1 img010 | |
| Modifications for a J. 3. and 4. Gearbox, concerning the 3rd motion shaft, cone fixing, and rivets. | 26th Oct 1931 | Box 179 \ 1 img011 | |
| Modifications to a P.2 twin choke carburettor's float mechanism. | 3rd Jan 1938 | Box 179 \ 1 img012 | |
| Modifications to crankshaft balance weights. | 18th Oct 1930 | Box 179 \ 1 img013 | |
| Design of change gears, specifically the adoption of a synchromesh system. | 28th Oct 1931 | Box 179 \ 1 img014 | |
| Scheme for a gearbox incorporating synchronised brakes, epicyclic units, and a jaw clutch drive. | 13th Oct 1931 | Box 179 \ 1 img015 | |
| Design changes to the J.3 front axle and brakes, including sending relevant schemes. | 13th Oct 1931 | Box 179 \ 1 img016 | |
| Arrangement of transporting Sir John Prestige's old car to Derby. | 13th Oct 1931 | Box 179 \ 1 img017 | |
| Poor visibility of dashboard instruments and a proposal to change the pivot point of the needles. | 14th Oct 1931 | Box 179 \ 1 img018 | |
| Failure of side wheel carriers with diamond mounting and suggesting design improvements. | 14th Oct 1931 | Box 179 \ 1 img019 | |
| Suggesting a method to test and identify power loss in an exhaust system by removing parts in stages. | 14th Oct 1931 | Box 179 \ 1 img020 | |
| The Boyce electric clock and its suitability for the 20/25 instrument panel. | 14th Oct 1931 | Box 179 \ 1 img021 | |
| Short internal memo regarding the departure time of Sir John Prestige's old car. | 15th Oct 1931 | Box 179 \ 1 img022 | |
| Advantages and disadvantages of using solid eye versus rolled eye road springs. | 15th Oct 1931 | Box 179 \ 1 img023 | |
| The conversion of a P. 2. petrol pump to direct acting. | 15th Oct 1931 | Box 179 \ 1 img024 | |
| Technical memorandum describing the design of the J.3 petrol pump and drive. | 15th Oct 1931 | Box 179 \ 1 img025 | |
| Letter detailing modifications and additions to the J.3. crankcase. | 15th Oct 1931 | Box 179 \ 1 img026 | |
| J.3. water pump and connection to the cylinder, noting a modification to the pump bracket. | 15th Oct 1931 | Box 179 \ 1 img027 | |
| Methods for reducing engine vibrations to allow for a high-speed 6-cylinder engine in a continental tourer. | 1st Oct 1931 | Box 179 \ 1 img028 | |
| The scheme for balancing a 12/8 crankshaft using balance weights. | 20th Oct 1931 | Box 179 \ 1 img029 | |
| Improvements to bonnet shutters by widening the gap and rounding the edges for a better appearance. | 20th Oct 1931 | Box 179 \ 1 img030 | |
| Impressions from a motor show, covering competitors, engine, gearbox, and suspension technologies. | 20th Oct 1931 | Box 179 \ 1 img031 | |
| Report critiquing various cars, including the 25HP model, a Thrupp & Maberley body, and a Hispano 12 cyl. | 20th Oct 1931 | Box 179 \ 1 img032 | |
| Design modifications and material choices for the 'U' Series - 25HP silencer. | 20th Oct 1931 | Box 179 \ 1 img033 | |
| Requiring bigger silencers for the P.2. and 25HP exhaust systems. | 20th Oct 1931 | Box 179 \ 1 img034 | |
| Exhaust silencers for the P. 2. & 'U' Series 25HP, favouring spot welding over riveting for cost-saving. | 20th Oct 1931 | Box 179 \ 1 img035 | |
| Recommendation to increase the back axle ratio by 10% for better speed and efficiency. | 28th Oct 1931 | Box 179 \ 1 img036 | |
| Impact of a tyre change on car height and proposing alternative wheel and rim sizes. | 20th Oct 1931 | Box 179 \ 1 img037 | |
| Modification to the J.3. water inlet pipe and pump bracket. | 21th Oct 1931 | Box 179 \ 1 img038 | |
| Investigation into a broken exhaust manifold and a proposal for a redesigned, telescoping version to cure the problem. | 24th Oct 1931 | Box 179 \ 1 img039 | |
| Record of a telephone conversation discussing Phantom II balance weights, 20/25 HP exhaust pipe failures, and Phantom II frames & fittings. | 22th Oct 1931 | Box 179 \ 1 img040 | |
| Outlining the procedure for submitting new part drawings to avoid waste and delays. | 22th Oct 1931 | Box 179 \ 1 img041 | |
| Development strategy for synchro mesh and epicyclic gear units. | 22th Oct 1931 | Box 179 \ 1 img042 | |
| That the starter switch press button should be located on the dashboard. | 23th Oct 1931 | Box 179 \ 1 img043 | |
| Agreed features for production aero engines and items for experimental trial. | 23th Oct 1931 | Box 179 \ 1 img044 | |
| Proposing a 10,000-mile test for an improved 20/25 exhaust manifold on the 'China' chassis. | 28th Oct 1931 | Box 179 \ 1 img045 | |
| The lead given to the 2nd motion wheel on the 25HP synchro-mesh gearbox. | 26th Oct 1931 | Box 179 \ 1 img046 | |
| Tyre and wheel specifications, rolling radius, and clearances for the 25HP model, including requests for new wheel sets for testing. | 26th Oct 1931 | Box 179 \ 1 img047 | |
| Requesting a custom set of instruments with Venetian cream dials for a Special Touring Saloon. | 26th Oct 1931 | Box 179 \ 1 img048 | |
| Modifications to bonnet shutters, including increasing the radius and the gap between the shutter and bonnet. | 26th Oct 1931 | Box 179 \ 1 img049 | |
| Design and testing of a P.2 synchro mesh gearbox, specifically concerning the power of the cones and clutch inertia. | 26th Oct 1931 | Box 179 \ 1 img050 | |
| Explaining that it is impossible to concentrate solely on project Japan 3, but work is being pushed to finish before Christmas. | 26th Oct 1931 | Box 179 \ 1 img051 | |
| Technical memorandum discussing seizing bushes and gear creep in the 'China' Easy Change Gearbox. | 27th Oct 1931 | Box 179 \ 1 img052 | |
| Boyce electrical self-winding clock and a potential alternative from Ferranti. | 27th Oct 1931 | Box 179 \ 1 img053 | |
| Ignition coil design and the development of a cheaper starter for the Japan 3 & Peregrine chassis. | 27th Oct 1931 | Box 179 \ 1 img054 | |
| Short memo confirming the non-receipt of prints for J. 3. Details at WN. | 29th Oct 1931 | Box 179 \ 1 img055 | |
| Low-temperature problems and potential solutions for the Buzzard engine on a Hawker Horsley aircraft. | 30th Oct 1931 | Box 179 \ 1 img056 | |
| Engine design choices, component development, and project philosophy regarding the 'Japan 1 Unit'. | 30th Oct 1931 | Box 179 \ 1 img057 | |
| Differences in the P. 2 gearbox sliding gears compared to the 25HP model. | 21th Oct 1931 | Box 179 \ 1 img058 | |
| Alterations to the J. 3. engine and radiator suspension, specifically the radiator's forward position. | 31th Oct 1931 | Box 179 \ 1 img059 | |
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