| Description | Date | Identifier | |
| Questionnaire from Automotive Products Company, Ltd. for engine specifications related to hydraulic tappets. | 30th Sep 1940 | Box 121 \ 1 scan0325 | |
| Data requirement form for hydraulic tappets from Automotive Products Company, Ltd. | 3rd Oct 1940 | Box 121 \ 1 scan0326 | |
| Leaflet on hydraulic tappets and considering their use based on maintenance and performance. | 3rd Oct 1940 | Box 121 \ 1 scan0327 | |
| Particulars and missing data from a brake chart for various models. | 14th Oct 1940 | Box 121 \ 1 scan0328 | |
| Letter from Automotive Products Company regarding wheel cylinder patterns and castings for dual brakes. | 16th Oct 1940 | Box 121 \ 1 scan0329 | |
| Advice note from Lockheed Hydraulic Brake Company regarding the despatch of wood pattern equipment for sample castings. | 17th Oct 1940 | Box 121 \ 1 scan0330 | |
| Advice note from Lockheed Hydraulic Brake Company for the dispatch of wood pattern equipment. | 17th Oct 1940 | Box 121 \ 1 scan0331 | |
| Main considerations of the Girling hydraulically operated brake layout patent. | 22th Oct 1940 | Box 121 \ 1 scan0332 | |
| Comparing the considerations for Girling and Lockheed hydraulically operated brake systems. | 22th Oct 1940 | Box 121 \ 1 scan0333 | |
| Forwarding a copy of a letter from F.G. Parnell of Lockheed's regarding drawings for the Rippletto and Myth cars. | 24th Oct 1940 | Box 121 \ 1 scan0334 | |
| Letter from Automotive Products Co. Ltd. enclosing drawings for Rippletto and Myth Cars. | 3rd Oct 1940 | Box 121 \ 1 scan0335 | |
| Letter from Automotive Products Company enclosing drawings for various brake system components. | 3rd Oct 1940 | Box 121 \ 1 scan0336 | |
| File note referencing correspondence with Automotive Products Company Limited regarding hydraulic brakes for 'Myth' and 'Rippletto' cars. | 29th Oct 1940 | Box 121 \ 1 scan0337 | |
| Experimental production of aluminium hub and drum brakes for the senior range of motor cars. | 29th Oct 1940 | Box 121 \ 1 scan0338 | |
| Requesting to source an aluminium Hispano brake drum with a cast-in liner. | 31th Oct 1940 | Box 121 \ 1 scan0339 | |
| Letter to Automotive Products Company Ltd. regarding drum rigidity, brake drums, and related drawings. | 5th Nov 1940 | Box 121 \ 1 scan0340 | |
| Letter from Automotive Products Company about brake drum rigidity and requesting an 11-inch drum for dynamometer testing. | 31th Oct 1940 | Box 121 \ 1 scan0341 | |
| Letter from Automotive Products Company Ltd. regarding preliminary tests of 11' brakes and brake spiders. | 31th Oct 1940 | Box 121 \ 1 scan0342 | |
| Letter to Automotive Products Co. Ltd. discussing brake modifications for the Myth car. | 31th Oct 1940 | Box 121 \ 1 scan0343 | |
| Letter discussing the braking system, pedal pressure, and component specifications. | 31th Oct 1940 | Box 121 \ 1 scan0344 | |
| The despatch of 24 brake shoes to New Hudson Ltd. in Birmingham. | 7th Nov 1940 | Box 121 \ 1 scan0345 | |
| The development and materials used for aluminium brake drums. | 31th Oct 1940 | Box 121 \ 1 scan0346 | |
| Brake drum liner interference fit and thermal expansion analysis. | 31th Oct 1940 | Box 121 \ 1 scan0347 | |
| Manufacturing issues with liners and drums, including material expansion and design failures. | 31th Oct 1940 | Box 121 \ 1 scan0348 | |
| Technical note discussing issues with doweling liners, comparing different fixing methods, and addressing a cracking problem. | 31th Oct 1940 | Box 121 \ 1 scan0349 | |
| Circumferential looseness of brake liners, temperature testing, and a proposed experiment with a diagram. | 31th Oct 1940 | Box 121 \ 1 scan0350 | |
| With a sketch discussing the design and properties of a drum with a cast-in liner. | 5th Nov 1940 | Box 121 \ 1 scan0351 | |
| Previous memo from Martindale about light alloy brake drums. | 5th Nov 1940 | Box 121 \ 1 scan0352 | |
| Technical memo detailing the design evolution and material considerations for aluminium brake drums. | 5th Nov 1940 | Box 121 \ 1 scan0353 | |
| Brake drum liner material testing and design improvements, including hand-drawn sketches. | 5th Nov 1940 | Box 121 \ 1 scan0354 | |
| Technical note discussing issues with dowel liners, crackling, looseness, and operating temperatures in drums. | 5th Nov 1940 | Box 121 \ 1 scan0355 | |
| Outlining proposed experiments and design for a brake drum with an iron liner. | 5th Nov 1940 | Box 121 \ 1 scan0356 | |
| Letter to Automotive Products Co. arranging the delivery of castings. | 7th Nov 1940 | Box 121 \ 1 scan0357 | |
| Letter from Ferodo Ltd discussing brake lining performance, temperature, fade, squeal, and arranging a visit. | 6th Nov 1940 | Box 121 \ 1 scan0358 | |
| Letter from Cornercroft Ltd. discussing manufacturing options for Phosphor Bronze Corrugated Plates. | 8th Nov 1940 | Box 121 \ 1 scan0359 | |
| Cover note attaching a copy of a letter received from Mr. F.G. Parnell concerning brakes. | 8th Nov 1940 | Box 121 \ 1 scan0360 | |
| Letter from Automotive Products Co. Ltd. discussing brake assembly specifications and arranging a meeting. | 4th Nov 1940 | Box 121 \ 1 scan0361 | |
| Confirming the pattern for twelve brake cylinder castings is on hand and production will commence. | 23th Oct 1940 | Box 121 \ 1 scan0362 | |
| The search for a Hispano car or one of its brake drums. | 6th Nov 1940 | Box 121 \ 1 scan0363 | |
| Short internal memo from 'Rm.' to 'JLE.' regarding the purchase of a drum for the brakes. | 12th Nov 1940 | Box 121 \ 1 scan0364 | |
| Visit to Lockheed to inspect their brake testing equipment, specifically dynamometers. | 15th Nov 1940 | Box 121 \ 1 scan0365 | |
| Demonstration of a Lockheed servo braking system mounted on a Wolseley 25 HP car. | 18th Nov 1940 | Box 121 \ 1 scan0366 | |
| Letter from Automotive Products Co. discussing brake modifications for the 'Myth' car. | 13th Nov 1940 | Box 121 \ 1 scan0367 | |
| Meeting notes regarding the 'Myth' car, discussing shoe factors, pedal travel, and brake assemblies. | 12th Nov 1940 | Box 121 \ 1 scan0368 | |
| Summary of agreements regarding modifications, drawings, and component specifications for the experimental 'Myth' car. | 17th Nov 1940 | Box 121 \ 1 scan0369 | |
| Letter to F. G. Parnell of Automotive Products Company regarding castings. | 17th Nov 1940 | Box 121 \ 1 scan0370 | |
| Letter from Automotive Products Company requesting castings for Transverse Wheel Cylinders and 'Rippletto' Brakes for testing. | 14th Nov 1940 | Box 121 \ 1 scan0371 | |
| Calculation of B.V brake pedal ratios for different mechanical and rationalised systems. | 29th Oct 1940 | Box 121 \ 1 scan0372 | |
| Page of calculations for pedal pressure and front to rear brake ratios. | 29th Oct 1940 | Box 121 \ 1 scan0373 | |
| Of drawings for Vauxhall front and rear brake drums. | 18th Nov 1940 | Box 121 \ 1 scan0374 | |
| Confirming receipt of 12 castings and ordering further quantities of wheel cylinder and bisector body castings. | 18th Nov 1940 | Box 121 \ 1 scan0375 | |
| Letter from the Experimental Department to Ferodo Ltd. requesting the manufacture of washers. | 19th Nov 1940 | Box 121 \ 1 scan0376 | |
| Dispatch request for aluminium castings to be sent to F.G. Parnell at Lockheed Hydraulic Brake Co. Ltd. | 26th Nov 1940 | Box 121 \ 1 scan0377 | |
| Confirming the receipt of sealing washers from Ferodos Ltd. and noting an outstanding order. | 27th Nov 1940 | Box 121 \ 1 scan0378 | |
| Letter to Lockheed Hydraulic Brake Co. Ltd. regarding the despatch of Bisector and wheel cylinder castings. | 27th Nov 1940 | Box 121 \ 1 scan0379 | |
| Status and suggested experiments for a rationalised brake system. | 4th Nov 1940 | Box 121 \ 1 scan0380 | |
| Technical report discussing issues with gearboxes, oil ingress, servo drives, and brake lining wear. | 4th Nov 1940 | Box 121 \ 1 scan0381 | |
| Suggested experiments for brake systems including efficiency, clearances, handbrake, and equaliser tests. | 4th Nov 1940 | Box 121 \ 1 scan0382 | |
| Brake faults, testing, and repairs for Captain Barnato's car. | 13th Nov 1940 | Box 121 \ 1 scan0383 | |
| Investigations into a servo squeak and groan, with proposed remedies. | 13th Nov 1940 | Box 121 \ 1 scan0384 | |
| Letter from Vandervell Products Ltd. regarding a substitute clutch disc. | 21th Nov 1940 | Box 121 \ 1 scan0385 | |
| Letter from Ferodo Limited regarding the despatch of Ferobestos/VG.100 sealing washers. | 23th Nov 1940 | Box 121 \ 1 scan0386 | |
| Letter from The Stainless Spinning Works clarifying a cost discrepancy for Spring Plates. | 6th Dec 1940 | Box 121 \ 1 scan0387 | |
| Letter from Vandervell Products Ltd. regarding modifications to clutch discs based on drawing GB.4586/8. | 12th Dec 1940 | Box 121 \ 1 scan0388 | |
| Letter to the Aluminium Foundry regarding faulty hydraulic brake cylinder castings and a request for replacements. | 16th Dec 1940 | Box 121 \ 1 scan0389 | |
| Letter to Automotive Products Co., Ltd. regarding casting alloys, brake drawings, and specific component dimensions. | 17th Dec 1940 | Box 121 \ 1 scan0390 | |
| Letter from the Chassis Design Department discussing specifications for a water excluder. | 19th Dec 1940 | Box 121 \ 1 scan0391 | |
| Letter from Vandervell Products Ltd. regarding a driving plate fitted with special clutch material for brakes/servo. | 19th Dec 1940 | Box 121 \ 1 scan0392 | |
| Problems with casting iron liners into aluminium brake drums, requesting a plating recommendation to prevent oxidation and electrolytic action. | 20th Dec 1940 | Box 121 \ 1 scan0393 | |
| Letter to The Lockheed Hydraulic Brake Co. Ltd., regarding the despatch and composition of wheel cylinder castings. | 18th Dec 1940 | Box 121 \ 1 scan0394 | |
| Despatch request for 12 experimental aluminium castings to be machined by Lockheed. | 18th Nov 1940 | Box 121 \ 1 scan0395 | |
| Requesting to identify the supplier of rubber dust covers for the handbrake on B.V, piece number GB.5171. | 20th Dec 1940 | Box 121 \ 1 scan0396 | |
| Front brakes, pivot, and suspension for the Myth project. | 20th Dec 1940 | Box 121 \ 1 scan0397 | |
| Proposing a series of tests for the 3.B.50 chassis. | 24th Dec 1940 | Box 121 \ 1 scan0398 | |
| Wheel hub modifications, cooling curves, and a mechanical petrol pump. | 24th Dec 1940 | Box 121 \ 1 scan0399 | |
| Issues of oxidation and electrolytic action when casting iron liners into aluminium brake drums. | 20th Dec 1940 | Box 121 \ 1 scan0400 | |
| Letter to Automotive Products Ltd. thanking them for a diary-calendar and sending Christmas wishes. | 18th Dec 1940 | Box 121 \ 1 scan0401 | |
| Letter from Automotive Products Company Ltd. sending a Desk Diary as a Christmas goodwill gesture. | 25th Dec 1940 | Box 121 \ 1 scan0402 | |
| Requesting the despatch of experimental aluminium castings to Lockheed Hydraulic Brake Co. Ltd for machining. | 4th Jan 1941 | Box 121 \ 1 scan0403 | |
| Request to issue an official order for 16 brake linings to Ferodos Ltd. | 10th Jan 1941 | Box 121 \ 1 scan0404 | |
| Request for the installation of additional lights and a switch for a car ramp at Clan Foundry. | 13th Jan 1941 | Box 121 \ 1 scan0405 | |
| Arrangements for partition alterations at the Clan Foundry offices. | 13th Jan 1941 | Box 121 \ 1 scan0406 | |
| Cover note accompanying a drawing of the Ferodo brake lining. | 14th Jan 1941 | Box 121 \ 1 scan0407 | |
| The best plating methods for cast iron liners intended for aluminium brake drums. | 3rd Jan 1941 | Box 121 \ 1 scan0408 | |
| Letter from Ferodo Ltd to the Experimental Department regarding the dispatch of missing VG.91 liners. | 3rd Feb 1941 | Box 121 \ 1 scan0409 | |
| Letter to Automotive Products Co., Ltd. detailing design changes to the master cylinder and handbrake linkage. | 11th Feb 1941 | Box 121 \ 1 scan0410 | |
| Letter discussing modifications to a master cylinder scheme, handbrake operation, and brake pedal spring. | 19th Feb 1941 | Box 121 \ 1 scan0411 | |
| Letter from Automotive Products Company Ltd. requesting drawings of brake spiders to make a sample for testing. | 19th Feb 1941 | Box 121 \ 1 scan0412 | |
| Letter from New-Hudson Ltd concerning the fitting of linings to brake shoes. | 24th Feb 1941 | Box 121 \ 1 scan0413 | |
| Letter from Iliffe & Sons Ltd. regarding the braking system on the Bentley V. | 24th Feb 1941 | Box 121 \ 1 scan0414 | |
| Letter from New-Hudson Ltd confirming despatch of brake linings and shoes and acknowledging an increase in order. | 5th Mar 1941 | Box 121 \ 1 scan0415 | |
| Letter from the British Tyre & Rubber Co. Ltd. enclosing a blueprint for producing Dust Covers. | 8th Mar 1941 | Box 121 \ 1 scan0416 | |
| Blueprints for a fan-cooled brake drum and subsequent production arrangements. | 20th Mar 1941 | Box 121 \ 1 scan0417 | |
| Letter from Ferodo Limited confirming an order for 8 brake segments based on drawing GB.3760. | 11th Mar 1941 | Box 121 \ 1 scan0418 | |
| Requesting an official order for servo friction linings and inquiring about the supplier of brake shoe guides. | 17th Mar 1941 | Box 121 \ 1 scan0419 | |
| Letter to Ferodo Ltd. requesting three servo friction linings according to drawing GB.4586 in VG.91 material. | 17th Mar 1941 | Box 121 \ 1 scan0420 | |
| Letter to the British Tyre & Rubber Company regarding a mandrel for dust covers and a rubber ring mould. | 17th Mar 1941 | Box 121 \ 1 scan0421 | |
| Letter to The British Tyre & Rubber Co., Ltd. confirming the manufacture of a rubber dust cover and washer. | 21th Mar 1941 | Box 121 \ 1 scan0422 | |
| Letter to Messrs. George Salter Ltd. requesting the supply of 4 dozen springs as per a specific drawing. | 21th Mar 1941 | Box 121 \ 1 scan0423 | |
| Letter from Geo. Salter & Co Ltd acknowledging an order for 4 dozen springs for brakes. | 25th Mar 1941 | Box 121 \ 1 scan0424 | |
| | | | |
