| Description | Date | Identifier | |
| Investigation into automatic starting carburetters for S.U. systems, detailing the disadvantages of the solenoid type. | 15th Mar 1940 | Box 159 \ 5 scan0005 | |
| Request to run a comparative oil consumption test between two different viscosity oils. | 18th Mar 1940 | Box 159 \ 5 scan0006 | |
| Pricing of 8 and 6 cylinder marine engine units and competing with American prices. | 19th Apr 1940 | Box 159 \ 5 scan0007 | |
| Departmental correspondence procedures for internal and external communications. | 24th Apr 1940 | Box 159 \ 5 scan0008 | |
| The test bed trial of a speed limit device for marine engines. | 26th Apr 1940 | Box 159 \ 5 scan0009 | |
| Blueprints for Crankshaft and Camshaft components for a Bentley 60 Chassis. | 16th May 1940 | Box 159 \ 5 scan0010 | |
| Alleged B.HP curve of a tested Lagonda, requesting a comparison with acceleration figures to create a B.M.E.P. curve. | 20th May 1940 | Box 159 \ 5 scan0011 | |
| Parts required for a B.80 Marine water-cooled exhaust manifold. | 21th May 1940 | Box 159 \ 5 scan0012 | |
| Parts and drawings for a Bentley 80 & L.H. Senior Range Hot Spot Operated Choke. | 21th May 1940 | Box 159 \ 5 scan0013 | |
| The distribution of blueprints for the B.60 chassis camshaft components. | 21th May 1940 | Box 159 \ 5 scan0014 | |
| Specifications for lightened brake drums and hubs for a Ripple Chassis I.R.I. | 23th May 1940 | Box 159 \ 5 scan0015 | |
| Update to the rear road spring drawing for the Ripplet and Rippletto chassis. | 23th May 1940 | Box 159 \ 5 scan0016 | |
| Parts required for the location of a thermometer in the cylinder head of a B.80 Marine Engine. | 23th May 1940 | Box 159 \ 5 scan0017 | |
| Confirming the issue of two blueprints for the drilling of an assembled frame for the L.H. Silver Phantom. | 23th May 1940 | Box 159 \ 5 scan0018 | |
| To testers requesting a summary of their job position due to a move to Clan Foundry. | 25th May 1940 | Box 159 \ 5 scan0019 | |
| Listing new drawings and required parts for scheme PL.168, section 5080. | 29th May 1940 | Box 159 \ 5 scan0020 | |
| New blueprint parts issued for Induction Pipe and Engine Controls. | 29th May 1940 | Box 159 \ 5 scan0021 | |
| Detailed parts list for the RIPPLETTO PL.66 scheme, covering crankshaft, flywheel, clutch, gearbox, and motion shaft components. | 29th May 1940 | Box 159 \ 5 scan0022 | |
| Storage of completed detail drawings until manufacturing recommences. | 31th May 1940 | Box 159 \ 5 scan0023 | |
| Outlining shop organisation, including working hours and procedures for testers. | 2nd Jun 1940 | Box 159 \ 5 scan0024 | |
| To Testers and D.O. Staff regarding the policy for weekend work. | 2nd Jun 1940 | Box 159 \ 5 scan0025 | |
| Finalising engine specifications for cast-iron units for a rationalised range of chassis. | 4th Jun 1940 | Box 159 \ 5 scan0026 | |
| Outlining proposed tests to investigate the phenomenon of engine 'running after switching off'. | 4th Jun 1940 | Box 159 \ 5 scan0027 | |
| Request for design recommendations to overcome excessive rear brake wear on 8-cylinder cars. | 6th Jun 1940 | Box 159 \ 5 scan0028 | |
| Query about the status of testing for the latest 6 and 8-cylinder induction pipes. | 6th Jun 1940 | Box 159 \ 5 scan0029 | |
| Availability of a Bentley induction pipe for sale to a Mr. Vandervell. | 6th Jun 1940 | Box 159 \ 5 scan0030 | |
| Defect in the fixed shutter cooling system for the 'Ripplet' and requesting recommendations. | 10th Jun 1940 | Box 159 \ 5 scan0031 | |
| Low under-bonnet temperature on the Ripple model, detrimental to carburation, and a proposed solution. | 14th Jun 1940 | Box 159 \ 5 scan0032 | |
| Urgent request for the number of skilled and semi-skilled workers required for the current week. | 26th Jun 1940 | Box 159 \ 5 scan0033 | |
| Outlining outstanding problems with rationalised cars, including vibration, clutch failures, and gearbox rattles. | 8th Aug 1940 | Box 159 \ 5 scan0034 | |
| Proposal to observe camshaft performance at slow speeds on a 3-cylinder engine. | 14th Aug 1940 | Box 159 \ 5 scan0035 | |
| Troubleshooting solutions for issues on an experimental car. | 18th Aug 1940 | Box 159 \ 5 scan0036 | |
| Listing engineering tasks and issues for various vehicle components. | 18th Aug 1940 | Box 159 \ 5 scan0037 | |
| Tyre squeal from Avon Tyres and an analysis of Buick brakes. | 18th Apr 1940 | Box 159 \ 5 scan0038 | |
| Technical analysis of creating a 3-cylinder engine by removing half the pistons and rods from a six-cylinder engine. | 14th Aug 1940 | Box 159 \ 5 scan0039 | |
| Test bed results for KLG spark plugs and the plan to test Lodge plugs. | 26th Aug 1940 | Box 159 \ 5 scan0040 | |
| Test on a 3-cylinder engine and the effects of inertia on engine roughness. | 26th Aug 1940 | Box 159 \ 5 scan0041 | |
| Faults and observations on car 4.B.50. | 9th Sep 1940 | Box 159 \ 5 scan0042 | |
| Advantages and disadvantages of two types of high-power cylinder heads. | 9th Sep 1940 | Box 159 \ 5 scan0043 | |
| Vehicle issues including propeller shaft vibration, clutch failures, steering shocks and gearbox rattle. | 9th Sep 1940 | Box 159 \ 5 scan0044 | |
| Propellor shaft vibration issues on B.V. cars and potential solutions. | 9th Sep 1940 | Box 159 \ 5 scan0045 | |
| Rationalised engine specifications, test procedures, and cylinder designs. | 9th Sep 1940 | Box 159 \ 5 scan0046 | |
| Arranging for the performance testing of clocks from Arrowsmith. | 13th Sep 1940 | Box 159 \ 5 scan0047 | |
| Rattle in the transmission of Lp.'s car and the plan to rectify it. | 15th Sep 1940 | Box 159 \ 5 scan0048 | |
| Parts list detailing modifications for 2nd, 3rd, and 4th gear anti-rattle components. | 15th Sep 1940 | Box 159 \ 5 scan0049 | |
| Requesting the start of a projected weight analysis for the 'Myth' project. | 15th Sep 1940 | Box 159 \ 5 scan0050 | |
| Comparing vehicle frame weights for a 'Corniche Myth' model against Studebaker and Vauxhall figures. | 16th Sep 1940 | Box 159 \ 5 scan0051 | |
| Comparing the weight of a proposed car model against competitors like the Studebaker Champion and Vauxhall, with a discussion on target weight and material use. | 18th Sep 1940 | Box 159 \ 5 scan0052 | |
| Confirming the replacement and examination of gearbox side shaft bearings for specific vehicles. | 24th Sep 1940 | Box 159 \ 5 scan0053 | |
| List of six complaints regarding car model 9.B.V., detailing issues with suspension, gearbox, axle, idling, brakes, and engine damper. | 24th Sep 1940 | Box 159 \ 5 scan0054 | |
| Request for a complete chart of brake ratios and lining details for various cars. | 24th Sep 1940 | Box 159 \ 5 scan0055 | |
| Confirming modifications and examinations of gearbox side shafts and bearings for various vehicles. | 24th Sep 1940 | Box 159 \ 5 scan0056 | |
| Providing instructions for the secure handling and delivery of original drawings. | 25th Sep 1940 | Box 159 \ 5 scan0057 | |
| Request to arrange for a detailed drawing of the Vauxhall brake drum and to ascertain the car's weight. | 25th Sep 1940 | Box 159 \ 5 scan0058 | |
| Heater be handed over to create a general arrangement drawing. | 25th Sep 1940 | Box 159 \ 5 scan0059 | |
| Confirming the programme for fitting different types of heaters to various car models. | 25th Sep 1940 | Box 159 \ 5 scan0060 | |
| Request for a brief report regarding the strip on 30.G.VII, to be filed with supplied photographs. | 25th Sep 1940 | Box 159 \ 5 scan0061 | |
| Short memo discussing the unattractiveness of a hydraulic accumulator for operating a gun. | 26th Sep 1940 | Box 159 \ 5 scan0062 | |
| Test report on a car, detailing issues with the petrol tank and speedometer, while noting excellent road holding and brakes. | 29th Sep 1940 | Box 159 \ 5 scan0063 | |
| Selling a Buick to purchase two smaller cars, with a list of preferred replacements. | 1st Oct 1940 | Box 159 \ 5 scan0064 | |
| Minutes of a conference regarding the design of the 'Myth' rear suspension. | 2nd Oct 1940 | Box 159 \ 5 scan0065 | |
| Decisions on tension and compression shackles and spring fixings. | 6th Oct 1940 | Box 159 \ 5 scan0066 | |
| Outlining the war-time experimental testing programme, prioritising work based on fault finding, vehicle improvement, and cost-saving. | 6th Oct 1940 | Box 159 \ 5 scan0067 | |
| Continued list of technical discussion points and a proposal to resume monthly meetings. | 6th Oct 1940 | Box 159 \ 5 scan0068 | |
| To all testers reverting to the pre-war practice for external correspondence. | 9th Oct 1940 | Box 159 \ 5 scan0069 | |
| Outlining the standard procedure for measuring oil consumption in company cars. | 20th Oct 1940 | Box 159 \ 5 scan0070 | |
| Procedural document outlining how to correctly measure oil drained from a crankcase. | 23th Oct 1940 | Box 159 \ 5 scan0071 | |
| Issues with carburettor intake air temperature and proposed solutions for various engine types. | 23th Oct 1940 | Box 159 \ 5 scan0072 | |
| And comparing vibration amplitudes and frequencies between 6-cylinder and flat-12 cylinder engines. | 26th Oct 1940 | Box 159 \ 5 scan0073 | |
| Calculations for engine vibration, harmonics, and the effects of inertia on different engine configurations. | 26th Oct 1940 | Box 159 \ 5 scan0074 | |
| And comparing engine vibration characteristics, specifically rev periods and amplitudes, of 6-cylinder and 12-cylinder engines. | 26th Oct 1940 | Box 159 \ 5 scan0075 | |
| Continued memo discussing engine vibration characteristics, harmonics, and calculations. | 26th Oct 1940 | Box 159 \ 5 scan0076 | |
| Chevrolet's engine ignition system updates based on an article in 'The Motor' magazine. | 28th Oct 1940 | Box 159 \ 5 scan0077 | |
| File copy of a memo enquiring about the progress of starter motor drives and suggesting a patent. | 28th Oct 1940 | Box 159 \ 5 scan0078 | |
| Recommending Vandervells to commence work on bearings immediately. | 28th Oct 1940 | Box 159 \ 5 scan0079 | |
| Design of the 'Myth' exhaust system, contrasting theoretical mathematical solutions with practical workshop adjustments. | 28th Oct 1940 | Box 159 \ 5 scan0080 | |
| Fan drive ratio on the Buick, questioning the current figure for comparison. | 29th Oct 1940 | Box 159 \ 5 scan0081 | |
| Outlining a new objective and procedure for oil and filter tests on experimental cars. | 29th Oct 1940 | Box 159 \ 5 scan0082 | |
| Page of continued instructions for oil and filter maintenance, detailing sampling procedures. | 29th Oct 1940 | Box 159 \ 5 scan0083 | |
| Program to organize the chassis material stores, including a schedule for personnel. | 5th Nov 1940 | Box 159 \ 5 scan0084 | |
| Programme of work for the week ending November 4th, detailing tasks for specific vehicles and components. | 5th Nov 1940 | Box 159 \ 5 scan0085 | |
| Requesting an update on clutch thrust races and assistance with inventorying parts. | 5th Nov 1940 | Box 159 \ 5 scan0086 | |
| Information received from Martindale on the subject of light alloy brake drums for future experiments. | 5th Nov 1940 | Box 159 \ 5 scan0087 | |
| Notes on the design decisions, materials, and calculations for aluminium brake drums. | 5th Nov 1940 | Box 159 \ 5 scan0088 | |
| Issues and failures during the development of drum liners, including material tests and design flaws. | 5th Nov 1940 | Box 159 \ 5 scan0089 | |
| Notes discussing problems and solutions for brake drum liners, including doweling, crackling, and thermal expansion. | 5th Nov 1940 | Box 159 \ 5 scan0090 | |
| Experiments and design for an iron-lined drum, including sketches and calculations. | 5th Nov 1940 | Box 159 \ 5 scan0091 | |
| Outlining a programme and personnel schedule for tidying up the chassis material stores. | 5th Nov 1940 | Box 159 \ 5 scan0092 | |
| Reminding to order 3¾ bore pistons. | 12th Nov 1940 | Box 159 \ 5 scan0093 | |
| Instructions to check speedometers for accurate petrol consumption on Morris, Standard, and Vauxhall cars. | 12th Nov 1940 | Box 159 \ 5 scan0094 | |
| Short memo discussing the supply of two seats to resemble the existing VanVooren seats. | 12th Nov 1940 | Box 159 \ 5 scan0095 | |
| Reminder to develop an air silencer for an 8-cylinder Morris engine and send it for testing. | 14th Nov 1940 | Box 159 \ 5 scan0096 | |
| Listing six action items related to information, parts, and drawings for various engine components. | 14th Nov 1940 | Box 159 \ 5 scan0097 | |
| Wisp induction system, recommending the adoption of a Vauxhall-style hot-spot for rapid warming. | 19th Nov 1940 | Box 159 \ 5 scan0098 | |
| Programme of tests for the Kestrel engine regarding detonation and power curves using Pool petrol. | 19th Nov 1940 | Box 159 \ 5 scan0099 | |
| Reliability of big end bearings and the testing of alternative materials like tri-metal and lead-bronze. | 26th Nov 1940 | Box 159 \ 5 scan0100 | |
| Internal memorandum confirming design specifications for the 18 Horsepower 6 Cylinder engine. | 28th Nov 1940 | Box 159 \ 5 scan0101 | |
| Faults observed on two cars, including vibrations, juddering, and engine issues. | 3rd Dec 1940 | Box 159 \ 5 scan0102 | |
| Minutes of a monthly conference for testers discussing various vehicle components. | 4th Dec 1940 | Box 159 \ 5 scan0103 | |
| Typed report detailing investigations and modifications on vehicle components. | 4th Dec 1940 | Box 159 \ 5 scan0104 | |
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