| Description | Date | Identifier | |
| Visit to Vauxhall's regarding Buick engine power improvements for the Phoenix engine unit. | 28th Sep 1937 | Box 111 \ 2 scan0241 | |
| Engine design elements like sump joints, con rod-crank ratios, and pistons. | 28th Sep 1937 | Box 111 \ 2 scan0242 | |
| Technical report discussing cylinder bore wear, piston material, and carburation tests. | 28th Sep 1937 | Box 111 \ 2 scan0243 | |
| Conversation with Maurice Olley regarding wishbone suspension and frame stiffness. | 28th Sep 1937 | Box 111 \ 2 scan0244 | |
| Blueprint showing a cross-section of a Buick piston and combustion chamber. | 28th Sep 1937 | Box 111 \ 2 scan0245 | |
| Photograph of an engine piston, showing its crown, ring grooves, and wrist pin boss. | 2nd Oct 1934 | Box 111 \ 2 scan0246 | |
| Memo listing four additional items discussed during a visit to Vauxhall. | 2nd Oct 1934 | Box 111 \ 2 scan0247 | |
| Comparing the costs of manufacturing a sump using die-cast aluminium versus pressed steel. | 28th Sep 1937 | Box 111 \ 2 scan0248 | |
| Cost comparison between pressing and die-casting methods for sump production. | 28th Sep 1937 | Box 111 \ 2 scan0249 | |
| Engine sump design, comparing pressed steel versus casting and outlining the pros and cons of a modified design. | 28th Sep 1937 | Box 111 \ 2 scan0250 | |
| Appearance and cost-effectiveness of pressed steel sumps versus aluminium ones. | 28th Sep 1937 | Box 111 \ 2 scan0251 | |
| Design implications of spare wheel placement for the 'Phoenix' project. | 30th Sep 1937 | Box 111 \ 2 scan0252 | |
| Changing the designation 'Phoenix' to 'Bentley 50'. | 13th Oct 1937 | Box 111 \ 2 scan0253 | |
| Directive to reduce material costs for the Bentley 50 model by 30% to ensure a satisfactory balance sheet. | 5th Nov 1937 | Box 111 \ 2 scan0254 | |
| Need to decrease material costs by 30% for the Bentley 50 car. | 5th Nov 1937 | Box 111 \ 2 scan0255 | |
| Proposed change to the 'Phoenix' project's name and dimensions and its policy implications for the Bentley and Rolls-Royce brands. | 12th Nov 1937 | Box 111 \ 2 scan0256 | |
| The branding and market implications of a new car, codenamed Phoenix, weighing whether to call it a Bentley or a Rolls-Royce. | 12th Nov 1937 | Box 111 \ 2 scan0257 | |
| The branding, production, and market potential for a new car model codenamed Phoenix. | 12th Nov 1937 | Box 111 \ 2 scan0258 | |
| Product strategy for introducing the Phoenix model and a replacement for the Wraith. | 12th Nov 1937 | Box 111 \ 2 scan0259 | |
| Summary of conclusions regarding branding, production, and market strategy for a new model. | 12th Nov 1937 | Box 111 \ 2 scan0260 | |
| Directive to testers to ensure work on Bentleys is instructed on Phoenix or B.III order numbers. | 16th Nov 1937 | Box 111 \ 2 scan0261 | |
| Specification details for the Bentley 50 engine following a planning conference. | 17th Nov 1937 | Box 111 \ 2 scan0262 | |
| Design considerations for the water pump, dynamo, fan, distributor, camshaft, and timing gears. | 17th Nov 1937 | Box 111 \ 2 scan0263 | |
| Design specifications for engine components including the oil pump, sump, and starter motor. | 17th Nov 1937 | Box 111 \ 2 scan0264 | |
| Engine design specifications and a project programme timeline. | 17th Nov 1937 | Box 111 \ 2 scan0265 | |
| Recommendation that all materials should be costed before ordering for the Works to avoid needless expenditure. | 17th Nov 1937 | Box 111 \ 2 scan0266 | |
| Project memo listing drawings and giving design instructions for the Bentley 50 Engine. | 18th Nov 1937 | Box 111 \ 2 scan0267 | |
| The Phoenix Order Number. | 20th Nov 1937 | Box 111 \ 2 scan0268 | |
| Brief history and comparison of the Bentley III and Bentley 50 (Phoenix) projects. | 25th Nov 1937 | Box 111 \ 2 scan0269 | |
| Comparison of specifications for the B.III and B.50 models, detailing a project to modify the B.III frame. | 25th Nov 1937 | Box 111 \ 2 scan0270 | |
| Comparison of Project No.4 (chassis B.III vs B.50) and Project No.5 proposals, detailing specifications and modifications. | 25th Nov 1937 | Box 111 \ 2 scan0271 | |
| Comparison of chassis specifications for B.III, B.50, and 4¼ Wraith III models. | 25th Nov 1937 | Box 111 \ 2 scan0272 | |
| Material cost breakdown for the Bentley 50 chassis. | 2nd Dec 1937 | Box 111 \ 2 scan0273 | |
| Request for an estimate on potential material savings for the B.50 over the existing Bentley. | 2nd Dec 1937 | Box 111 \ 2 scan0274 | |
| Confidential memo comparing material and wages costs with Rover to set a cost target for a £900 Bentley car. | 4th Dec 1937 | Box 111 \ 2 scan0275 | |
| Cost comparison analysis of wages to material ratios for Rover and Bentley 12.HP chassis production. | 4th Dec 1937 | Box 111 \ 2 scan0276 | |
| Price comparison list for automotive electrical components, showing existing versus new material and labour costs. | 6th Dec 1937 | Box 111 \ 2 scan0277 | |
| Covering note for blueprint PD.64 showing the front end of the B.50 engine, including the slipper damper, timing gears, and camshaft. | 6th Dec 1937 | Box 111 \ 2 scan0278 | |
| Recent development work on a high power engine head. | 14th Dec 1937 | Box 111 \ 2 scan0279 | |
| Performance comparison between two cylinder head designs, No. 4 and No. 5 (Phoenix Type), for the Bentley 50 Type engine. | 13th Dec 1937 | Box 111 \ 2 scan0280 | |
| Engine smoothness and turbulence, with a graph comparing ignition advance curves for two high power head designs. | 13th Dec 1937 | Box 111 \ 2 scan0281 | |
| Power curve comparison at constant detonation for different cylinder heads, using a 50/50 paraffin-shell fuel mixture. | 13th Dec 1937 | Box 111 \ 2 scan0282 | |
| Engine detonation, percentage power loss with respect to No.4 head, and valve timing tests. | 13th Dec 1937 | Box 111 \ 2 scan0283 | |
| Comparison of different valve timing configurations for a high power engine head, illustrated with a performance graph. | 1st Dec 1937 | Box 111 \ 2 scan0284 | |
| The effect of exhaust valve lift on engine performance, including a comparative power graph. | 13th Dec 1937 | Box 111 \ 2 scan0285 | |
| Exhaust valve lift and mechanical failures, including cylinder head collapse and issues with exhaust valves and seats. | 13th Dec 1937 | Box 111 \ 2 scan0286 | |
| Decision to use the Wraith engine for the Bentley 50 chassis. | 17th Dec 1937 | Box 111 \ 2 scan0287 | |
| Listing outstanding projects for the B.3 and B.50 car models. | 23th Dec 1937 | Box 111 \ 2 scan0288 | |
| Proposed cost-saving modifications to the B.50 model, focusing on the rear axle, dashboard, brake drums, and radiator. | 10th Jan 1938 | Box 111 \ 2 scan0289 | |
| Specification and programme for the Bentley 50 model, including preliminary road test details and production timeline. | 13th Jan 1938 | Box 111 \ 2 scan0290 | |
| Specification and programme for the Bentley 50, detailing preliminary road tests and component changes. | 13th Jan 1938 | Box 111 \ 2 scan0291 | |
| Major components for the 2nd Bentley III and 1st Bentley 50 cars. | 18th Jan 1938 | Box 111 \ 2 scan0292 | |
| Conference notes on the design and production requirements for the B.III and B.50 experimental models. | 26th Jan 1938 | Box 111 \ 2 scan0293 | |
| Design of an electrical oil level indicator for the Bentley 50, proposing an alternative arrangement. | 31th Jan 1938 | Box 111 \ 2 scan0294 | |
| Preliminary specification document concerning the Bentley 50 chassis. | 5th Feb 1938 | Box 111 \ 2 scan0295 | |
| Component list for the 'G' Section of the Bentley 50 model, with references and notes. | 5th Feb 1938 | Box 111 \ 2 scan0296 | |
| Parts list for the Bentley 50, detailing differences and commonalities with the Bentley lll, Wraith lll, and other models. | 5th Feb 1938 | Box 111 \ 2 scan0297 | |
| Continued index for 'D' Section, listing various electrical components and their applications. | 5th Feb 1938 | Box 111 \ 2 scan0298 | |
| Parts list index for 'F' Section, detailing components and their vehicle application. | 5th Feb 1938 | Box 111 \ 2 scan0299 | |
| Index page detailing component sections including pressure piping, tools, spares, and a side spare wheel carrier. | 5th Feb 1938 | Box 111 \ 2 scan0300 | |
| Parts list for 'E' Section of the Bentley 50, detailing component interchangeability with other models. | 5th Feb 1938 | Box 111 \ 2 scan0301 | |
| List of components for Section 'E', detailing their titles and associated vehicle models or modifications. | 24th Feb 1938 | Box 111 \ 2 scan0302 | |
| Specification document for the first experimental B.50 car, detailing required designs and parts. | 24th Feb 1938 | Box 111 \ 2 scan0303 | |
| Car specifications regarding wheels and tyres, and the urgency of parts lists. | 24th Feb 1938 | Box 111 \ 2 scan0304 | |
| List of Bentley 111 sections and parts applicable to the Bentley 50 model. | 2nd Mar 1938 | Box 111 \ 2 scan0305 | |
| List of parts categorized by department, section number, title, and L.O.P. number. | 2nd Mar 1938 | Box 111 \ 2 scan0306 | |
| Secret memorandum discussing the specification and programme for the B.50 model, including delays and proposed parts. | 4th Mar 1938 | Box 111 \ 2 scan0307 | |
| Specifications for wheels, springs, and axles for the B.50 and B.III car models. | 4th Mar 1938 | Box 111 \ 2 scan0308 | |
| Design modifications for the Bentley 50 engine cylinder and head, including a bore increase. | 4th Mar 1938 | Box 111 \ 2 scan0309 | |
| Policy discussion on chassis and power plant design, comparing the B.50 unit with the Phantom III engine and other alternatives. | 5th Mar 1938 | Box 111 \ 2 scan0310 | |
| Future engine design strategy, comparing the redesign of the Phantom III unit against new concepts and market considerations. | 5th Mar 1938 | Box 111 \ 2 scan0311 | |
| Development expenditure, production, and pricing for a complete car, with a reference to competitor Vauxhalls. | 5th Mar 1938 | Box 111 \ 2 scan0312 | |
| List of 19 proposed design features and modifications for an engine. | 5th Mar 1938 | Box 111 \ 2 scan0313 | |
| The oil filler, engine breather, and oil dipstick for the Bentley 50 model. | 10th Mar 1938 | Box 111 \ 2 scan0314 | |
| Specification and programme timeline for the Bentley 50. | 11th Mar 1938 | Box 111 \ 2 scan0315 | |
| Specification and programme update for the Bentley 50 project, detailing timelines for the gearbox, dashboard, and bonnet. | 10th Mar 1938 | Box 111 \ 2 scan0316 | |
| Modifications to the cylinder head of the Bentley 50 Engine. | 11th May 1938 | Box 111 \ 2 scan0317 | |
| Revision of the programme for the Bentley 50 chassis and measures to ensure schedule adherence. | 14th Mar 1938 | Box 111 \ 2 scan0318 | |
| Calling a conference to fix a completion date for the Bentley 50 chassis. | 16th Mar 1938 | Box 111 \ 2 scan0319 | |
| Specification and programme document outlining the development timeline for the Bentley 50 model components. | 10th Mar 1938 | Box 111 \ 2 scan0320 | |
| Milestone chart tracking the design and planning progress of the B50 engine project. | 24th Mar 1938 | Box 111 \ 2 scan0321 | |
| Study on crankshaft length as the controlling factor for a straight 8-cylinder 3.5' bore engine. | 24th Mar 1938 | Box 111 \ 2 scan0322 | |
| 'Bentley 50', confirming agreement to conference minutes and discussing completion timelines. | 25th Mar 1938 | Box 111 \ 2 scan0323 | |
| Confirming details for a B.50 car fitted with a Straight 8 engine. | 28th Mar 1938 | Box 111 \ 2 scan0324 | |
| Bearing width and water spacing for a Straight 8 Engine with a 3.5' bore. | 28th Mar 1938 | Box 111 \ 2 scan0325 | |
| Modifications to the Bentley lll and Bentley 50 production programme. | 5th Apr 1938 | Box 111 \ 2 scan0326 | |
| Modifications to programmes for Bentley lll and Bentley 50. | 5th Apr 1938 | Box 111 \ 2 scan0327 | |
| Programme outlining the development and build status for the Bentley 111 model. | 5th Apr 1938 | Box 111 \ 2 scan0328 | |
| Production programme and timeline for the Bentley 50 model. | 5th Apr 1938 | Box 111 \ 2 scan0329 | |
| Production programme and timeline for the Bentley 50 model. | 5th Apr 1938 | Box 111 \ 2 scan0330 | |
| Introduction of Jaguar-style traffic indicators and a reversing light on the Bentley 50 chassis. | 6th Apr 1938 | Box 111 \ 2 scan0331 | |
| Listing design schemes to complete the major sections of project 1.B.50. | 7th Apr 1938 | Box 111 \ 2 scan0332 | |
| Dispatch of blueprints for the crankcase and bearings of a Bentley 50 Chassis. | 11th Apr 1938 | Box 111 \ 2 scan0333 | |
| B.50 specification sheet detailing instrument, battery, wiring, and starter motor components. | 14th Apr 1938 | Box 111 \ 2 scan0334 | |
| Parts list for Section D, detailing electrical components and their specifications. | 14th Apr 1938 | Box 111 \ 2 scan0335 | |
| List of vehicle components and parts with corresponding operation numbers and usage notes. | 14th Apr 1938 | Box 111 \ 2 scan0336 | |
| List of parts and specifications for Section E, covering water pumps, oil systems, fans, and radiators. | 14th Apr 1938 | Box 111 \ 2 scan0337 | |
| Specification sheet listing vehicle sections, part numbers, and build details. | 14th Apr 1938 | Box 111 \ 2 scan0338 | |
| Specification sheet detailing various vehicle components and their arrangements under Sections F and G. | 14th Apr 1938 | Box 111 \ 2 scan0339 | |
| List of transmission, drivetrain, and braking system components with their corresponding part numbers and notes. | 14th Apr 1938 | Box 111 \ 2 scan0340 | |
| | | | |