| Description | Date | Identifier | |
| Modifications and troubleshooting for the J.3 Engine Unit's half-time gears. | 15th Mar 1932 | Box 5 \ 1 01-page033 | |
| List of points discussing improvements for wheels, gear tooth engagement, and tappet auto-adjustment. | 15th Mar 1932 | Box 5 \ 1 01-page034 | |
| The design philosophy for an engine's tappet auto-adjustment mechanism. | 15th Mar 1932 | Box 5 \ 1 01-page035 | |
| Required modifications and design revisions for the J.J. chassis and engine. | 15th Mar 1932 | Box 5 \ 1 01-page036 | |
| Recommended road testing procedures, engine test unit development, and chassis work for a new car model. | 15th Mar 1932 | Box 5 \ 1 01-page037 | |
| Dispatch of tracings for a Fan Bracket and Wire Fittings, noting a modification to the Fan Bracket's location. | 16th Mar 1932 | Box 5 \ 1 01-page038 | |
| The performance of 'Japan J No.1' engine, detailing a 10-hour duration test, gear quality, and issues with cooling and oil leaks. | 18th Mar 1932 | Box 5 \ 1 01-page039 | |
| Engine test results, covering oil leaks, consumption, component issues, and water flow analysis. | 15th Jan 1932 | Box 5 \ 1 01-page040 | |
| Engine cooling system tests, including water temperatures, flow rates, and observed detonation. | 14th Dec 1932 | Box 5 \ 1 01-page041 | |
| Graph plotting water flow against engine RPM for the Japan 3 No 1 model under specific test conditions. | 18th Mar 1932 | Box 5 \ 1 01-page042 | |
| Project plan for the J.3. unit, a fault in its water system, and a decision on how to proceed without delaying the job. | 18th Mar 1932 | Box 5 \ 1 01-page043 | |
| Cost-saving measures and design improvements for the 25 HP model. | 22th Mar 1932 | Box 5 \ 1 01-page044 | |
| Status update memo on the completion of the J.3 chassis, noting parts for shock absorber control are awaited. | 24th Mar 1932 | Box 5 \ 1 01-page045 | |
| Brief memo on the progress of fitting a body and testing a second engine unit. | 9th Apr 1932 | Box 5 \ 1 01-page046 | |
| Future of the J.S. model, considering a new central change gearbox and a completely new chassis. | 2nd Apr 1932 | Box 5 \ 1 01-page047 | |
| Modifications to the Shock Damper. | 26th Apr 1932 | Box 5 \ 1 01-page048 | |
| Road test report commenting on the performance and faults of a limousine-bodied car. | 29th Apr 1932 | Box 5 \ 1 01-page049 | |
| List of points needing design attention and areas requiring experimental work on car components. | 27th Apr 1932 | Box 5 \ 1 01-page050 | |
| Engine tappet noise, cam design, valve timing, and high lift cams. | 11th May 1932 | Box 5 \ 1 01-page051 | |
| Report discussing potential solutions for issues with a novel engine design, clutch, and crankshaft damper. | 11th May 1932 | Box 5 \ 1 01-page052 | |
| Damper wheel design, materials, and potential improvements with a cross-sectional diagram. | 13th May 1932 | Box 5 \ 1 01-page053 | |
| Blueprint for modifications to a Japan III engine's cylinder head and valve rocker mechanism. | 13th May 1932 | Box 5 \ 1 01-page054 | |
| Confirmation request for the exhaust and inlet tappet clearances for the J.3. engine. | 14th May 1932 | Box 5 \ 1 01-page055 | |
| Test report on engine tappet clearance variation on the test bed. | 20th May 1932 | Box 5 \ 1 01-page056 | |
| Listing documents being sent for a Left-hand J.III model, specifically for Engine Controls and Pedals. | 30th May 1932 | Box 5 \ 1 01-page057 | |
| Confirming the dispatch of mixture and throttle controls for a left-hand drive J.III model. | 3rd Jun 1932 | Box 5 \ 1 01-page058 | |
| Confirming a car is in the shop and requesting the fitting of a luggage grid and crankshaft damper. | 3rd Jun 1932 | Box 5 \ 1 01-page059 | |
| Tabulated list comparing valve opening specifications across various engines. | 15th Jul 1931 | Box 5 \ 1 01-page060 | |
| Requesting production of parts and preliminary tests for a high power output 25 HP unit with a J.I. cylinder head. | 14th Jun 1932 | Box 5 \ 1 01-page061 | |
| Comparison of engine performance based on different valve configurations and sizes. | 1st Jun 1933 | Box 5 \ 1 01-page062 | |
| Analysis of engine performance comparing valve configurations, camshaft designs, and turbulence effects. | 24th Jun 1932 | Box 5 \ 1 01-page063 | |
| Summary of findings on improving engine power characteristics through changes to exhaust systems and camshafts. | 24th Aug 1932 | Box 5 \ 1 01-page064 | |
| Comparative table of specifications for various engine models. | 24th Aug 1932 | Box 5 \ 1 01-page065 | |
| Graph showing the performance effects of increased valve lift on a standard cylinder head with a 1.9' diameter valve throat. | 24th Aug 1932 | Box 5 \ 1 01-page066 | |
| Blueprint graph comparing engine performance with different valve sizes and carburettors using a W.W. 114 camshaft. | 24th Aug 1932 | Box 5 \ 1 01-page067 | |
| Performance graph showing the effect of increased valve lift on a standard camshaft and cylinder head. | 24th Aug 1932 | Box 5 \ 1 01-page068 | |
| Power curve graph for a 7983 CC 8 Litre Bentley engine comparing different timing configurations. | 24th Aug 1932 | Box 5 \ 1 01-page069 | |
| Performance comparison graph of an 8 Litre Bentley engine and a 40/50 R.R.M. engine, showing Mean Effective Pressures (MEPs) and valve timing diagrams. | 24th Aug 1932 | Box 5 \ 1 01-page070 | |
| Performance graph showing BMEP vs RPM for a 20/25 HP engine with various camshaft timing configurations. | 24th Jun 1932 | Box 5 \ 1 01-page071 | |
| Comparing the performance and features of two test cars, 19-EX and J.3. | 24th Jun 1932 | Box 5 \ 1 01-page072 | |
| List of components and systems for models J.LLL and 19-GIV, with corresponding reference numbers. | 27th Jun 1932 | Box 5 \ 1 01-page073 | |
| Performance curves and test results for the Japan III power unit. | 28th Jun 1938 | Box 5 \ 1 01-page074 | |
| Power curves graph showing B.HP vs R.P.M. for a J III engine with twin carburetors and open exhaust. | 28th Jun 1938 | Box 5 \ 1 01-page075 | |
| Graph comparing engine performance with different air silencer and intake configurations. | 28th Jun 1938 | Box 5 \ 1 01-page076 | |
| Graph showing performance variation with different tappet clearances on a 112 'D' Camshaft with 2 exhaust cams. | 28th Jun 1938 | Box 5 \ 1 01-page077 | |
| Performance comparison graph for 110.5 degree and 120 degree camshafts made with two exhaust cams. | 29th Jun 1932 | Box 5 \ 1 01-page078 | |
| Requesting a progress update on the conversion of a 'China engine' experimental car into a 'J.I.' type for holiday testing. | 29th Jun 1932 | Box 5 \ 1 01-page079 | |
| Carburetter options and other modifications for car 19-G4, including radiator tests at Brooklands. | 30th Jun 1932 | Box 5 \ 1 01-page080 | |
| List of modifications and differences of car 19-G4 compared to the standard 20/25HP model. | 23th Jul 1932 | Box 5 \ 1 01-page081 | |
| Incompatibility of the autovac with the low depression carburetter on the 20/25 model, requesting a petrol pump be fitted. | 25th Jul 1932 | Box 5 \ 1 01-page082 | |
| Future development of the 20/25 HP car and proposals for improvements using parts from the Peregrine and J.3 models. | 25th Aug 1932 | Box 5 \ 1 01-page083 | |
| Performance improvements of the J.3 model and the strategic implications of introducing the Peregrine engine. | 28th Aug 1932 | Box 5 \ 1 01-page084 | |
| The performance and issues of a car with a J.I. engine after a 2,000-mile test drive on the Continent. | 29th Aug 1932 | Box 5 \ 1 01-page085 | |
| Poor fuel consumption and a noisy exhaust following a trip in France. | 9th Aug 1932 | Box 5 \ 1 01-page086 | |
| Providing feedback on a vehicle's performance, covering the silencer, carburettors, shock absorbers, suspension, and heat issues. | 1st Aug 1932 | Box 5 \ 1 01-page087 | |
| Feedback from a car road test, noting issues with the shutters, petrol gauge, engine, steering, and clutch. | 22th Aug 1932 | Box 5 \ 1 01-page088 | |
| Speed-related engine issue, suspecting the crankshaft damper, and considering carburettor and petrol pump alternatives. | 29th Aug 1932 | Box 5 \ 1 01-page089 | |
| Unreliability of petrol pumps and the risk of being stranded. | 29th Aug 1932 | Box 5 \ 1 01-page090 | |
| Fractured petrol pipe on car 19-G-IV during a trip from Switzerland to France. | 23th Aug 1932 | Box 5 \ 1 01-page091 | |
| Engine design, carburetters, and other mechanical improvements regarding a car used in France. | 1st Aug 1932 | Box 5 \ 1 01-page092 | |
| Future car model strategy and resolving issues with mechanically driven petrol pumps versus the autovac system. | 1st Sep 1932 | Box 5 \ 1 01-page093 | |
| From a conference discussing future improvements and engine capacity increases for the 25 HP car. | 1st Sep 1932 | Box 5 \ 1 01-page094 | |
| Design problems and modifications for the J.3 project, including engine mounting, slipper wheel, and brake thumps. | 1st Sep 1932 | Box 5 \ 1 01-page095 | |
| Production of further experimental 25 HP (J.3) cars with modified bores and the secrecy surrounding the project. | 9th Aug 1932 | Box 5 \ 1 01-page096 | |
| Secret memo discussing the proposal to build a second J.III car and a bump chassis, noting issues with the first model. | 5th Sep 1932 | Box 5 \ 1 01-page097 | |
| Suggestion for holding the J.3 and Peregrine I engine firmly endwise with diagonal rods. | 1st Sep 1932 | Box 5 \ 1 01-page098 | |
| Customer criticisms from Major Veal concerning the 20/25 HP Chassis. | 8th Sep 1932 | Box 5 \ 1 01-page099 | |
| Responding to points raised about the 20/25 HP Chassis, specifically regarding the oil indicator, oil filler, sump, and radiator shutters. | 9th Sep 1932 | Box 5 \ 1 01-page100 | |
| Follow-up memo from 'Sg.' to 'Hs.' requesting information on reported issues, particularly excessive petrol consumption. | 9th Sep 1932 | Box 5 \ 1 01-page101 | |
| Fuel consumption, carburetters, and noise issues on car 19-GIV. | 9th Sep 1932 | Box 5 \ 1 01-page102 | |
| Adoption of a side drain plug and the operation of radiator shutters for the 20/25 chassis. | 10th Sep 1932 | Box 5 \ 1 01-page103 | |
| Test report on car 19-G-IV, detailing positive feedback on handling and smoothness, alongside issues with the exhaust, carburation, gear lever, and steering controls. | 12th Sep 1932 | Box 5 \ 1 01-page104 | |
| From Sg. to Hs. enquiring about the speed required to achieve a petrol consumption of 15½ miles to the gallon. | 12th Sep 1932 | Box 5 \ 1 01-page105 | |
| Response to criticisms regarding the 20/25 HP Chassis, discussing improvements for oil systems and radiator shutters. | 13th Sep 1932 | Box 5 \ 1 01-page106 | |
| Repeated petrol consumption test for vehicle 19-G-IV. | 16th Sep 1932 | Box 5 \ 1 01-page107 | |
| 20/25 HP chassis criticisms, specifically regarding oil drainage and radiator shutter control. | 20th Sep 1932 | Box 5 \ 1 01-page108 | |
| J.2. engine, detailing its arrangement, dimensions, and the method of converting a J.3. engine to a J.2. | 27th Sep 1932 | Box 5 \ 1 01-page109 | |
| Meeting notes regarding modifications required for the J.2. Chassis. | 10th Oct 1932 | Box 5 \ 1 01-page110 | |
| List of required modifications and design updates for various automotive components. | 10th Oct 1932 | Box 5 \ 1 01-page111 | |
| List of modifications and design schemes for various automotive components. | 10th Oct 1932 | Box 5 \ 1 01-page112 | |
| List of required design and engineering updates for various vehicle components. | 10th Oct 1932 | Box 5 \ 1 01-page113 | |
| List of action points regarding the development of schemes for battery box suspension and luggage grids. | 10th Oct 1932 | Box 5 \ 1 01-page114 | |
| Prints LeC.3193 and LeC.3242 for 'Japan II', detailing modified engine components. | 14th Oct 1932 | Box 5 \ 1 01-page115 | |
| Sir Malcolm Campbell's feedback on the 20/25 HP chassis performance on wet roads. | 4th Nov 1932 | Box 5 \ 1 01-page116 | |
| Brake pressure distribution for different chassis models and a report on steering issues with a Phantom II Continental. | 1st Nov 1932 | Box 5 \ 1 01-page117 | |
| Response to Sir Malcolm Campbell's criticism of the 25 HP car regarding skidding and braking. | 10th Nov 1932 | Box 5 \ 1 01-page118 | |
| Specification sheet outlining modifications for the J.2 chassis by converting a J.3 chassis. | 15th Nov 1932 | Box 5 \ 1 01-page119 | |
| List of modifications and component references for various vehicle systems, continued from a previous page. | 15th Nov 1932 | Box 5 \ 1 01-page120 | |
| Progress report on a list of outstanding items required for the J.2 chassis. | 16th Nov 1938 | Box 5 \ 1 01-page121 | |
| Required modifications and decisions for various vehicle components, including steering, suspension, and exhaust. | 15th Nov 1932 | Box 5 \ 1 01-page122 | |
| With comments and suggestions on the design of dry dampers, fan pulleys, and hubs. | 17th Nov 1932 | Box 5 \ 1 01-page123 | |
| Clarifying that the term 'O' Series' refers to the last 100 ordered 40/50 HP chassis, not the entire series. | 18th Nov 1932 | Box 5 \ 1 01-page124 | |
| Modifications to the J.2. Engine, specifically the drilling of holes in the crankcase and cross drive for oil management. | 23th Nov 1932 | Box 5 \ 1 01-page125 | |
| Transmittal note for a document concerning the Ignition Wiring Tube and fittings. | 24th Nov 1932 | Box 5 \ 1 01-page126 | |
| Testing the J.11 & J.111 cars in France, including adaptations from the Peregrine, propeller shaft recommendations, and carburetter development. | 26th Nov 1932 | Box 5 \ 1 01-page127 | |
| J.2 engine programme, including modifications for small and large bore units. | 2nd Dec 1932 | Box 5 \ 1 01-page128 | |
| Instructions and blueprint details for retrofitting Japan I units with a Peregrine II ignition governor, drive, and distributor. | 7th Jan 1933 | Box 5 \ 1 01-page129 | |
| The preparation of chassis J.III for dispatch to France, detailing outstanding engine and suspension requirements. | 18th Jan 1933 | Box 5 \ 1 01-page130 | |
| Examination of the failure of split pins on 20/25 HP cars. | 16th Feb 1933 | Box 5 \ 1 01-page131 | |
| The filter circuit connection and future contracts for 20/25 HP Tank Engines. | 23th Feb 1933 | Box 5 \ 1 01-page132 | |
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