| Description | Date | Identifier | |
| The development of sleeve valves, exhaust rings, and high-octane aviation fuels in the late 1930s. | 15th May 1939 | Box 27 \ 3 Scan223 | |
| Octane fuel forecasts, diesel engine development, and cabin supercharging projects in the U.S. | 15th May 1939 | Box 27 \ 3 Scan224 | |
| Report page discussing Eclipse supercharger proposals, drag reduction through new cowling shapes, and powerplant interchangeability. | 15th May 1939 | Box 27 \ 3 Scan225 | |
| Visit to the Eclipse Aviation Division of Bendix, discussing generators, starters, and accessory drives. | 15th May 1939 | Box 27 \ 3 Scan226 | |
| Aircraft auxiliary power systems, including power take-off, generators, gearboxes, and electrical system specifications. | 15th May 1939 | Box 27 \ 3 Scan227 | |
| Vacuum pump components and airscrew development research at Pratt & Whitney. | 15th May 1939 | Box 27 \ 3 Scan228 | |
| Airscrew drive separation, de-icing methods, and carburettor icing issues. | 15th May 1939 | Box 27 \ 3 Scan229 | |
| Carburettor icing issues, design choices, and testing by various engine manufacturers. | 15th May 1939 | Box 27 \ 3 Scan230 | |
| Carburettor performance, discussing fuel boiling, and a review of the Bendix-Stromberg carburettor. | 15th May 1939 | Box 27 \ 3 Scan231 | |
| Carburettor design, fuel metering, and a comparison with Pratt & Whitney and Bendix systems. | 15th May 1939 | Box 27 \ 3 Scan232 | |
| The development and interest in direct fuel injection for aircraft engines. | 15th May 1939 | Box 27 \ 3 Scan233 | |
| Oil quality testing, sludge deposition, and disagreements between Wright and various oil companies. | 15th May 1939 | Box 27 \ 3 Scan234 | |
| Visit to Esso Research Laboratories, detailing research on fuels, oils, corrosion, and engine type testing. | 15th May 1939 | Box 27 \ 3 Scan235 | |
| Outline of American type test requirements for aircraft engines, detailing dynamometer calibration and a 150-hour endurance test. | 15th May 1939 | Box 27 \ 3 Scan236 | |
| Endurance testing procedures for aircraft engines including dives, idling, and post-test checks. | 15th May 1939 | Box 27 \ 3 Scan237 | |
| Note by Mr. Nutt on engine testing procedures, including magnafluxing, brake HP tests and expected engine life. | 6th Oct 1939 | Box 27 \ 3 Scan238 | |
| Cylinder fin design for the Boreas engine, referencing US practices and future development. | 6th Oct 1939 | Box 27 \ 3 Scan239 | |
| Calculating petrol allowances for an employee's journey to Belper. | 6th Oct 1939 | Box 27 \ 3 Scan240 | |
| The Rolls-Royce-Bristol liaison regarding the need for Air Ministry clearance for engine modifications. | 6th Oct 1939 | Box 27 \ 3 Scan241 | |
| Brief resume on the performance of doped oil in aircraft engines. | 7th Oct 1939 | Box 27 \ 3 Scan242 | |
| The performance of various Extreme Pressure (E.P.) lubricating oils and their effects on engine components. | 7th Oct 1939 | Box 27 \ 3 Scan243 | |
| Comparison of different lubricants, their properties, and performance in gearboxes and axles. | 7th Oct 1939 | Box 27 \ 3 Scan244 | |
| Concluding paragraph regarding the use of E.P. lubricants to reduce the weight of aircraft engine reduction gears. | 7th Oct 1939 | Box 27 \ 3 Scan245 | |
| Laboratory report on Vulture reduction gear teeth after approximately 40 hours of running on Silvertown oil. | 31th May 1938 | Box 27 \ 3 Scan246 | |
| Requesting a change in the distribution list for specific reports. | 9th Oct 1939 | Box 27 \ 3 Scan247 | |
| Circulating a letter of praise from an R.A.F. Wing Commander for the Merlin IV engine. | 9th Oct 1939 | Box 27 \ 3 Scan248 | |
| Correcting mileage calculations related to petrol supplies and rationing. | 9th Oct 1939 | Box 27 \ 3 Scan249 | |
| Letter to T.C. Worth of The Harborough Aircraft Mfg. Co. regarding an engine position and the return of a loaned book. | 9th Oct 1939 | Box 27 \ 3 Scan250 | |
| Letter to A. R. Robotham from Leslie seeking machine work due to the disruption of normal trade. | 9th Oct 1939 | Box 27 \ 3 Scan251 | |
| List of available machine tools from the Engineering Department of Henry Hawkins Ltd. | 3rd Oct 1939 | Box 27 \ 3 Scan252 | |
| Internal routing slip with initials and a signature. | 10th Oct 1939 | Box 27 \ 3 Scan253 | |
| Engine failures caused by inconsistencies in Lodge and K.L.G. aluminium oxide insulated spark plugs. | 10th Oct 1939 | Box 27 \ 3 Scan254 | |
| Investigation report into the failure of standard Sintercorund sparking plugs and suggested modifications. | 10th Oct 1939 | Box 27 \ 3 Scan255 | |
| Comparison of spark plug performance, contrasting cemented K.L.G./Lodge plugs with A.C. plugs using a silver centre electrode. | 10th Oct 1939 | Box 27 \ 3 Scan256 | |
| The development and testing of new spark plugs, including different materials and compensating washers to prevent gas leakage. | 10th Oct 1939 | Box 27 \ 3 Scan257 | |
| Blueprint diagram illustrating heat flow paths within a component, showing the effects of cement failure. | 10th Oct 1939 | Box 27 \ 3 Scan258 | |
| Blank document bearing a 'Received' date stamp from Derby. | 10th Oct 1939 | Box 27 \ 3 Scan259 | |
| Cross-section drawings comparing K.L.G., Lodge, and A.C. spark plugs. | 19th Oct 1941 | Box 27 \ 3 Scan260 | |
| Purple ink stamp from the Print Room in Derby. | 10th Oct 1939 | Box 27 \ 3 Scan261 | |
| Photographic comparison of AC, Lodge, and KLG spark plug insulators after endurance testing on Vulture, Peregrine, and Merlin engines. | 10th Oct 1939 | Box 27 \ 3 Scan262 | |
| Page with a handwritten negative number. | 10th Oct 1939 | Box 27 \ 3 Scan263 | |
| Clarifying a misunderstanding regarding fuel rationing and mileage. | 10th Oct 1939 | Box 27 \ 3 Scan264 | |
| List of information required from Amiots regarding a prototype aircraft. | 10th Oct 1939 | Box 27 \ 3 Scan265 | |
| List of information required from Avro regarding a Merlin-engined aircraft prototype. | 11th Oct 1939 | Box 27 \ 3 Scan266 | |
| Recommending a driving route from Derby to Leeds. | 11th Oct 1939 | Box 27 \ 3 Scan267 | |
| Recommending an employee be added to the official driving list to use their own car and conserve company fuel. | 11th Oct 1939 | Box 27 \ 3 Scan268 | |
| Delivery note for a steel wardrobe with its dimensions and features. | 16th Oct 1939 | Box 27 \ 3 Scan269 | |
| To all departments regarding changes to mail collection times due to war time regulations. | 13th Oct 1939 | Box 27 \ 3 Scan270 | |
| Proposal to change the location of auxiliary gear boxes from in front of to behind the aircraft bulkhead. | 22th Mar 1943 | Box 27 \ 3 Scan271 | |
| Standardizing universal gearboxes for aircraft engines with the Bristol Aeroplane Company. | 14th Oct 1939 | Box 27 \ 3 Scan272 | |
| Letter declining contract work due to being at full capacity producing engines. | 17th Oct 1939 | Box 27 \ 3 Scan273 | |
| Clarifying the use of the abbreviation 'RM' to avoid confusion. | 18th Oct 1939 | Box 27 \ 3 Scan274 | |
| Letter from coachbuilders Park Ward & Co. Ltd discussing manufacturing capabilities and seeking work opportunities. | 18th Oct 1939 | Box 27 \ 3 Scan275 | |
| The production capacity of Messrs. Park Ward's works and potential future collaboration. | 7th Nov 1939 | Box 27 \ 3 Scan276 | |
| Request from Park Wards for assistance in finding work, forwarding a list of their equipment and fabrication capabilities. | 20th Oct 1939 | Box 27 \ 3 Scan277 | |
| List of manufacturing capabilities from Park Ward & Co Ltd's Steel and Wood Working shops. | 18th Oct 1939 | Box 27 \ 3 Scan278 | |
| Continued list of workshop capabilities for P. W. & Co., Ltd, detailing smith, trimming, and paint shop services. | 18th Oct 1939 | Box 27 \ 3 Scan279 | |
| List of plant, specifically metal working machines, from coachbuilders Park Ward & Co Ltd. | 18th Oct 1939 | Box 27 \ 3 Scan280 | |
| List of metal working machines including swaging, drilling, and grinding machines. | 18th Oct 1939 | Box 27 \ 3 Scan281 | |
| Typed list of woodworking machines. | 18th Oct 1939 | Box 27 \ 3 Scan282 | |
| List of machines for a Smiths' Shop. | 18th Oct 1939 | Box 27 \ 3 Scan283 | |
| List of machines required for the Trimming Shop. | 18th Oct 1939 | Box 27 \ 3 Scan284 | |
| List of machines for the paint shop, including air compressors and electric polishing machines. | 18th Oct 1939 | Box 27 \ 3 Scan285 | |
| Letter regarding an Engineering Apprentice, Mr. M.W. Sydenham, who will not be taken on as he is continuing at the Polytechnic. | 18th Oct 1939 | Box 27 \ 3 Scan286 | |
| Rota listing employees and their addresses for Sunday overtime shifts. | 18th Oct 1939 | Box 27 \ 3 Scan287 | |
| Notice to all superintendents and foremen regarding the introduction and rules for new employee identity badges. | 16th Oct 1939 | Box 27 \ 3 Scan288 | |
| Reinforcing the regulation for handling and transit of secret documents. | 16th Oct 1939 | Box 27 \ 3 Scan289 | |
| Directive concerning the mandatory wearing of identity badges by all employees within the factories. | 16th Oct 1939 | Box 27 \ 3 Scan290 | |
| Requesting the reduction in size of attached blueprints PL.6 Sheets 1 and 2. | 19th Oct 1939 | Box 27 \ 3 Scan291 | |
| Two alternative Sunday transport routes and schedules for personnel. | 19th Oct 1939 | Box 27 \ 3 Scan292 | |
| Return and painting of parts for new car bodies. | 19th Oct 1939 | Box 27 \ 3 Scan293 | |
| Adjustments to bonus payments for Millwrights, Experimental staff, and Labourers. | 20th Oct 1939 | Box 27 \ 3 Scan294 | |
| Staff expenses claim form detailing subsistence allowances and deductions. | 1st May 1939 | Box 27 \ 3 Scan295 | |
| Finding fabrication work for a company called Park Wards. | 20th Oct 1939 | Box 27 \ 3 Scan296 | |
| Discussions on engine orders, Ministry contracts, propeller supply, and aircraft gun positions. | 20th Oct 1939 | Box 27 \ 3 Scan297 | |
| Urgent inquiry from Major Bulman regarding drawings being sent to America. | 20th Oct 1939 | Box 27 \ 3 Scan298 | |
| Secret memo discussing a scheme for a Central Control Office to manage parts production and inventory. | 21th Oct 1939 | Box 27 \ 3 Scan299 | |
| Two proposed methods for receiving and compiling information from assembly firms. | 21th Oct 1939 | Box 27 \ 3 Scan300 | |
| Requesting a bus to transport designers to Belper on a Sunday. | 21th Oct 1939 | Box 27 \ 3 Scan301 | |
| Letter regarding a meeting with Mr. Thacker of Joseph Lucas Ltd. and a past acquaintance. | 23th Oct 1939 | Box 27 \ 3 Scan302 | |
| Requesting confirmation to pay an invoice from Hoare & Son for film developing and enlargements. | 23th Oct 1939 | Box 27 \ 3 Scan303 | |
| Telegram authorizing the dispatch of Merlin engine blueprints and parts to the USA. | 27th Oct 1939 | Box 27 \ 3 Scan304 | |
| Authorising payment for an invoice from Hoare & Sons for film development and enlargements. | 24th Oct 1939 | Box 27 \ 3 Scan305 | |
| Request for a Certificate of Insurance for amendment regarding the use of cars on company business. | 24th Oct 1939 | Box 27 \ 3 Scan306 | |
| Letter to the Castle Bromwich Aeroplane Factory regarding a factory visit and the need to accelerate engine output. | 24th Oct 1939 | Box 27 \ 3 Scan307 | |
| Message to the Air Ministry regarding a machine tool agent and the status of recent tool orders. | 24th Oct 1939 | Box 27 \ 3 Scan308 | |
| Page 2 of a telex message regarding drawings and responsibility at the Glasgow factory. | 24th Oct 1939 | Box 27 \ 3 Scan309 | |
| Minutes from a liaison meeting with Bristol on power plant interchangeability and standardisation. | 24th Oct 1939 | Box 27 \ 3 Scan310 | |
| Meeting minutes discussing agreements on aircraft component standards, installations, and supply schedules. | 24th Oct 1939 | Box 27 \ 3 Scan311 | |
| Providing a Certificate of Insurance for the use of cars on company business. | 25th Oct 1939 | Box 27 \ 3 Scan312 | |
| Querying the details of a verbal tenancy agreement for a shed at Shardlow. | 25th Oct 1939 | Box 27 \ 3 Scan313 | |
| Telex query regarding the authority to send Merlin drawings to America on behalf of the Glasgow factory. | 25th Oct 1939 | Box 27 \ 3 Scan314 | |
| Telegram concerning an inquiry into the authority of individuals named Steinwell and Steinle. | 28th Oct 1939 | Box 27 \ 3 Scan315 | |
| Agenda for a liaison meeting between Rolls Royce and Bristol to be held in Derby. | 26th Oct 1939 | Box 27 \ 3 Scan316 | |
| List of discussion points for wartime production and development, page 2. | 26th Oct 1939 | Box 27 \ 3 Scan317 | |
| Letter from the Castle Bromwich Aeroplane Factory regarding a misunderstanding and an invitation for a visit. | 26th Oct 1939 | Box 27 \ 3 Scan318 | |
| Requesting sanction to add an individual to the official driving list for the post-war car programme. | 26th Oct 1939 | Box 27 \ 3 Scan319 | |
| Letter to The Petroleum Board regarding a query about 110 octane fuel and the arrangement of specifications and sample supplies. | 26th Oct 1939 | Box 27 \ 3 Scan320 | |
| Letter from Vauxhall Motors requesting a works tour for Mr. E. Beaumont and Mr. Tipler. | 27th Oct 1939 | Box 27 \ 3 Scan321 | |
| Letter to Shell Mex and B.P. Ltd regarding the development and supply of 110 octane fuel for testing. | 27th Oct 1939 | Box 27 \ 3 Scan322 | |
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