| Description | Date | Identifier | |
| Confidential cover note for a memo from Kennington detailing his past development work at General Motors. | 22th Dec 1938 | Box 148 \ 2 scan0093 | |
| Design and performance details of an 8-cylinder radial 2-cycle supercharged petrol engine developed by General Motors. | 28th Nov 1938 | Box 148 \ 2 scan0094 | |
| Description of a pair of cylinders with inlet pistons, detailing their operation and construction. | 28th Nov 1938 | Box 148 \ 2 scan0095 | |
| Technical description of an engine's crankshaft, connecting rods, and supercharger components. | 28th Nov 1938 | Box 148 \ 2 scan0096 | |
| Report page detailing tests on blowers, carburetter and ignition systems, and engine performance metrics like horsepower and BMEP. | 28th Nov 1938 | Box 148 \ 2 scan0097 | |
| Report page detailing engine performance characteristics including torque, fuel consumption, idling, smoothness, and starting. | 28th Nov 1938 | Box 148 \ 2 scan0098 | |
| The reliability and quietness of an experimental engine. | 28th Nov 1938 | Box 148 \ 2 scan0099 | |
| The methods of instrumentation and development for a two-cycle engine, focusing on pressure wave analysis. | 28th Nov 1938 | Box 148 \ 2 scan0100 | |
| Page detailing engine development, covering issues with detonation, airflow tests, mixture distribution, and gas analysis results. | 28th Nov 1938 | Box 148 \ 2 scan0101 | |
| Report page discussing air consumption measurement methods with a disclaimer on the data's age. | 28th Nov 1938 | Box 148 \ 2 scan0102 | |
| Indicator cards comparing engine pressures with and without detonation. | 28th Nov 1938 | Box 148 \ 2 scan0103 | |
| Blueprint sketch showing the approximate layout of a supercharged engine. | 31th Dec 1938 | Box 148 \ 2 scan0104 | |
| The tensile testing of Quadrant Holders, proposing a material change from Silver Bronze to Dixstampo. | 31th Dec 1938 | Box 148 \ 2 scan0105 | |
| Probable cost of the B.V. chassis and questioning the high factory overheads. | 10th Jan 1939 | Box 148 \ 2 scan0106 | |
| Querying the increased cost of R.A.D.13 linings. | 14th Jan 1939 | Box 148 \ 2 scan0107 | |
| Cost comparison document for various gearbox models, including material, labour, and burden costs. | 18th Jan 1939 | Box 148 \ 2 scan0108 | |
| Comparing the cost and features of various 4-speed gearboxes, including the B.50, Wraith, Snipe, and Mina boxes. | 19th Jan 1939 | Box 148 \ 2 scan0109 | |
| Production costs of Bentley and Wraith gearboxes in comparison to a Rover box. | 19th Jan 1939 | Box 148 \ 2 scan0110 | |
| Cost breakdown and comparison for servo parts for the Wraith 'B' Series and Bentley 50. | 23th Jan 1939 | Box 148 \ 2 scan0111 | |
| Test drive report and comparison of a 1939 12-cylinder Lagonda against a Bentley. | 30th Jan 1939 | Box 148 \ 2 scan0112 | |
| Comparative analysis of a Bentley and a Lagonda, focusing on refinement, gear noise, and gear change mechanisms. | 30th Jan 1939 | Box 148 \ 2 scan0113 | |
| Comparative review of a converted Bentley against a standard model and a 6-cylinder Lagonda. | 30th Jan 1939 | Box 148 \ 2 scan0114 | |
| Cost analysis and price comparison of clutches supplied by Borg & Beck Ltd. | 1st Feb 1939 | Box 148 \ 2 scan0115 | |
| Cost comparison and savings analysis for different clutch manufacturing features. | 1st Feb 1939 | Box 148 \ 2 scan0116 | |
| The price and feasibility of using a 'Long' type clutch on a Bentley V chassis. | 7th Feb 1939 | Box 148 \ 2 scan0117 | |
| Warning testers about high charges from supplier Metalastik Ltd. for experimental rubber-to-metal parts and suggesting alternatives. | 7th Feb 1939 | Box 148 \ 2 scan0118 | |
| Costs and specifications for clutches supplied by Borg & Beck Ltd., focusing on standardisation for Bentley models. | 8th Feb 1939 | Box 148 \ 2 scan0119 | |
| Technical review of clutch finishing, machining, balancing, and component selection. | 8th Feb 1939 | Box 148 \ 2 scan0120 | |
| The special finish of a pressure plate and its cost. | 8th Feb 1939 | Box 148 \ 2 scan0121 | |
| Outlining the progress of the Rationalised Programme and suggesting further areas for review and simplification. | 14th Feb 1939 | Box 148 \ 2 scan0122 | |
| List of points concerning chassis re-design and manufacturing development. | 14th Feb 1939 | Box 148 \ 2 scan0123 | |
| The sale of Experimental Phantom III No. 12 Unit to Marstons for radiator development tests. | 14th Feb 1939 | Box 148 \ 2 scan0124 | |
| Experimental patterns for producing castings in both aluminium and cast iron. | 20th Feb 1939 | Box 148 \ 2 scan0125 | |
| The costs and reasons for experimental scrap due to chassis design changes and incorrect drawings. | 21th Feb 1939 | Box 148 \ 2 scan0126 | |
| Summary of a conversation about a rationalising programme for standardising car components. | 22th Feb 1939 | Box 148 \ 2 scan0127 | |
| Clarifying the status of parts supplied for investigation without a covering memo. | 2nd Mar 1939 | Box 148 \ 2 scan0128 | |
| Cost comparison for Whitemetal bearings and Inlet valves from different suppliers. | 8th Mar 1939 | Box 148 \ 2 scan0129 | |
| Summary of annual cost savings on car parts prior to a takeover. | 8th Mar 1939 | Box 148 \ 2 scan0130 | |
| The 'Rationalising Programme' and simplification of components. | 9th Mar 1939 | Box 148 \ 2 scan0131 | |
| Acknowledging arrangements made in a previous communication to facilitate experiments. | 9th Mar 1939 | Box 148 \ 2 scan0132 | |
| The cost and details of experimental scrap due to incorrect chassis drawings for a four-week period. | 10th Mar 1939 | Box 148 \ 2 scan0133 | |
| 1938 and 1939 chassis development budgets, with a breakdown of historical costs and units produced. | 14th Mar 1939 | Box 148 \ 2 scan0134 | |
| Financial credits for chassis disposals and transfers, with a recommendation for the 1939 budget. | 16th Mar 1939 | Box 148 \ 2 scan0135 | |
| Note concerning the conversion of an 'M' Series Bentley chassis to suit a Paulin Streamline body. | 16th Mar 1939 | Box 148 \ 2 scan0136 | |
| Outlining the 'Rationalised Chassis Programme' for Rolls-Royce and Bentley cars. | 17th Mar 1939 | Box 148 \ 2 scan0137 | |
| Confirming the compatibility of a radiator shirt with B.50 radiator 'internals'. | 17th Mar 1939 | Box 148 \ 2 scan0138 | |
| Cost comparison memo for a Delco-Remy Distributor and an estimated figure for part DW.426 R.R. | 17th Mar 1939 | Box 148 \ 2 scan0139 | |
| Cost and weight comparison between the Cub and Wraith engines. | 17th Mar 1939 | Box 148 \ 2 scan0140 | |
| Cost comparison for Leyland and Wraith gearboxes, detailing weight, material, and labour costs. | 17th Mar 1939 | Box 148 \ 2 scan0141 | |
| Request to credit the experimental chassis test department for 6 special raised crown pistons for Chassis 74 M.R. | 21th Mar 1939 | Box 148 \ 2 scan0142 | |
| Financial summary detailing costs for Sanderson & Holmes and Park Ward, including various chassis models and parts. | 27th Mar 1939 | Box 148 \ 2 scan0143 | |
| Allocation of designs for rationalised programmes and the difficulty in setting completion dates. | 27th Mar 1939 | Box 148 \ 2 scan0144 | |
| Allocating work for the front suspension, noting its connection to the brakes. | 27th Mar 1939 | Box 148 \ 2 scan0145 | |
| The design and production timeline for radiators on 'Ripple', 'B.50-RR', and 'Cresta' models. | 27th Mar 1939 | Box 148 \ 2 scan0146 | |
| Design and scheduling of 8 1/2' and 10' rear axle ring gears. | 27th Mar 1939 | Box 148 \ 2 scan0147 | |
| Design policy and component choices for frames, springs, and roll rods. | 27th Mar 1939 | Box 148 \ 2 scan0148 | |
| Feasibility of fitting a rear roll rod to a 'Corniche' model. | 27th Mar 1939 | Box 148 \ 2 scan0149 | |
| Expressing frustration about delayed modifications for the B. 60 and Wraith models and ignored test results. | 5th Apr 1939 | Box 148 \ 2 scan0150 | |
| Cost reduction measures for the petrol filler and clutch operation. | 6th Apr 1939 | Box 148 \ 2 scan0151 | |
| Summary comparing the R.R. and Delco distributors for the Wraith model, outlining faults and factors against the R.R. unit. | 15th Apr 1939 | Box 148 \ 2 scan0152 | |
| Decision to fit an R.R. distributor to the Wraith C series and comparing it to the Delco distributor. | 15th Apr 1939 | Box 148 \ 2 scan0153 | |
| Cost comparison for a Wraith pedal gap plate made from Aluminium versus Bakelite. | 18th Apr 1939 | Box 148 \ 2 scan0154 | |
| Review of component costs for a rationalised programme, focusing on the Bentley V chassis and potential savings. | 18th Apr 1939 | Box 148 \ 2 scan0155 | |
| Internal memorandum detailing potential cost reductions and simplifications for various vehicle components. | 20th Dec 1938 | Box 148 \ 2 scan0156 | |
| Review of vehicle component designs and costs, suggesting simplifications for parts such as the clutch, pedals, and engine mounting. | 20th Dec 1938 | Box 148 \ 2 scan0157 | |
| Cost analysis and saving suggestions for various vehicle components including shock absorbers, electricals and brackets. | 20th Dec 1938 | Box 148 \ 2 scan0158 | |
| Required refinements such as lighting, steering wheels, and lubrication systems. | 1st Oct 1938 | Box 148 \ 2 scan0159 | |
| Comparative analysis of gearbox material costs for the B.50 and Wraith models. | 1st Oct 1938 | Box 148 \ 2 scan0160 | |
| Confirming a conversation about a loose pendulum lever found at Brooklands and ensuring all future danger points will be signed for. | 20th Apr 1939 | Box 148 \ 2 scan0161 | |
| Secret internal memo discussing the cost of components for a Rationalised Programme and defending design choices against cost criticisms. | 26th Apr 1939 | Box 148 \ 2 scan0162 | |
| Cost and weight reduction for rationalised parts following a 50,000-mile road test. | 26th Apr 1939 | Box 148 \ 2 scan0163 | |
| Costs for rear axle pinion bearings. | 27th Apr 1939 | Box 148 \ 2 scan0164 | |
| Comparison of gearbox components and costs between Rolls Royce and Vauxhall models. | 27th Apr 1939 | Box 148 \ 2 scan0165 | |
| Comparison of the number of parts in B.V. and Vauxhall gearboxes. | 27th Apr 1939 | Box 148 \ 2 scan0166 | |
| Table quantifying units included by ROY/LES but not provided by Vauxhall. | 27th Apr 1939 | Box 148 \ 2 scan0167 | |
| Cost breakdown sheet for gearbox components of the 25/30-HP (R.2. Series) and Wraith 'A' models. | 9th May 1939 | Box 148 \ 2 scan0168 | |
| Cost analysis sheet comparing parts for 'Wraith A' and 'Wraith C' models. | 28th Apr 1939 | Box 148 \ 2 scan0169 | |
| Requesting a cost tabulation for chassis servicing alternatives related to cylinder bore wear. | 28th Apr 1939 | Box 148 \ 2 scan0170 | |
| The cost and reasons for experimental scrap parts due to chassis design changes. | 1st May 1939 | Box 148 \ 2 scan0171 | |
| Rejecting a high-cost estimate for putting a 6-cylinder engine on an existing test bed. | 2nd May 1939 | Box 148 \ 2 scan0172 | |
| Disapproval of a millwright's estimate and the consideration of sub-contracting. | 4th May 1939 | Box 148 \ 2 scan0173 | |
| Confirming a discussion about a rationalised chassis production programme, requesting cost submissions based on different production scenarios. | 9th May 1939 | Box 148 \ 2 scan0174 | |
| The cost and reasons for experimental scrap due to chassis design changes. | 5th May 1939 | Box 148 \ 2 scan0175 | |
| Blueprints for a rationalised chassis programme, including the 6-cylinder Wraith replacement. | 16th May 1939 | Box 148 \ 2 scan0176 | |
| Improvements and listing faults found during the completion of new chassis. | 24th May 1939 | Box 148 \ 2 scan0177 | |
| Proposal to create a standardized list of danger points for inspection on new cars. | 24th May 1939 | Box 148 \ 2 scan0178 | |
| Improvements in chassis manufacturing and a list of common faults found on a specific chassis. | 24th May 1939 | Box 148 \ 2 scan0179 | |
| Suggestion to create a standardised list of danger points for inspection on new cars. | 24th May 1939 | Box 148 \ 2 scan0180 | |
| Outlining suggestions for the dimensions of a new car model under the 'Junior Rationalised Programme'. | 27th May 1939 | Box 148 \ 2 scan0181 | |
| Outlining the priority order and status of various cars scheduled for standardisation tests in France. | 27th May 1939 | Box 148 \ 2 scan0182 | |
| Completion of a new timing case and casting, and the status of the RIPPLE project. | 27th May 1939 | Box 148 \ 2 scan0183 | |
| Request for a cost analysis on a connecting rod and crankshaft for Bentley V or Wraith III models. | 31th May 1939 | Box 148 \ 2 scan0184 | |
| Letter from S. Smith & Sons regarding a speedometer quotation and arranging a meeting. | 2nd Jun 1939 | Box 148 \ 2 scan0185 | |
| Letter from S. Smith & Sons (Motor Accessories) Ltd. offering service assurances. | 2nd Jun 1939 | Box 148 \ 2 scan0186 | |
| Notes by 'Oy' on the rationalization and future design of Bentley cars, comparing them with Detroit models. | 6th Jun 1939 | Box 148 \ 2 scan0187 | |
| Design memorandum discussing vehicle dimensions and styling principles, comparing American and English practices. | 8th Jun 1939 | Box 148 \ 2 scan0188 | |
| Outlining a proposed road testing program for cars with rationalised parts in France. | 8th Jun 1939 | Box 148 \ 2 scan0189 | |
| Testing a 6-cylinder engine in a Silver Dawn chassis and preparations for the 1940 Motor Show. | 8th Jun 1939 | Box 148 \ 2 scan0190 | |
| Outlining the estimated factory labour costs for four operations on a Wraith Cylinder Liner. | 9th Jun 1939 | Box 148 \ 2 scan0191 | |
| Manufacturing operations list for a Phosphor Chrome Cylinder Liner. | 8th Jun 1939 | Box 148 \ 2 scan0192 | |
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