| Description | Date | Identifier | |
| Photograph showing wear caused by a roller bearing on the radius of a Distance Piece from a Bentley IIA rear axle. | 19th Nov 1937 | Box 84 \ 4 scan0348 | |
| The failure of two pinion bearings for a Bentley rear axle during dynamometer testing. | 19th Nov 1937 | Box 84 \ 4 scan0349 | |
| Photograph of disassembled pinion bearing components with typed failure analysis reports. | 11th Nov 1937 | Box 84 \ 4 scan0350 | |
| Bearing specifications for the Bentley Rear Axle, based on a reply from Messrs. Hoffmann. | 19th Nov 1937 | Box 84 \ 4 scan0351 | |
| Letter from Hoffmann Manufacturing Co. regarding combined ball and roller bearings for the Bentley rear axle. | 18th Nov 1937 | Box 84 \ 4 scan0352 | |
| Confirming a modification to the loose collar on the Bentley 11.A rear axle differential to correct a fault. | 20th Nov 1937 | Box 84 \ 4 scan0353 | |
| Attempts to quieten Bentley axle overrun noise at 40 M.P.H. | 26th Nov 1937 | Box 84 \ 4 scan0354 | |
| Complaints of noisy Bentley axles and the urgency of the matter. | 29th Nov 1937 | Box 84 \ 4 scan0355 | |
| Invoice discrepancy for bearings from Ransome & Marles Bearing Co. Ltd. | 29th Nov 1937 | Box 84 \ 4 scan0356 | |
| The re-polishing of a noisy MDJT 1 1/4' bearing sent to Ransome & Marles and the associated servicing costs. | 30th Nov 1937 | Box 84 \ 4 scan0357 | |
| Telegram received by telephone regarding the availability of rear axles for test. | 1st Dec 1937 | Box 84 \ 4 scan0358 | |
| Post Office Telegram regarding the unavailability of rear axles for testing. | 1st Dec 1937 | Box 84 \ 4 scan0359 | |
| Service history of three Bentley cars fitted with special pinion bearings. | 30th Nov 1937 | Box 84 \ 4 scan0360 | |
| Official order for a 1-MJT.40 bearing from Messrs. Ransome & Marles. | 7th Dec 1937 | Box 84 \ 4 scan0361 | |
| Proposal for a simplified crown wheel mounting for the back axle of Bentley, Bentley 50, and Wraith models. | 10th Dec 1937 | Box 84 \ 4 scan0362 | |
| Note regarding standardising the 10 x 43 rear axle gears for the second half of the Bentley 'M' series. | 15th Dec 1937 | Box 84 \ 4 scan0363 | |
| Letter from George Angus & Co Ltd regarding issues with competitive oil seals and offering superior samples for testing. | 17th Dec 1937 | Box 84 \ 4 scan0364 | |
| Letter to Geo. Angus & Co. Ltd. about trialling their seals on Bentley back axles. | 20th Dec 1947 | Box 84 \ 4 scan0365 | |
| Status of Bentley rear axles, specifically the absence of over-run issues. | 21th Dec 1937 | Box 84 \ 4 scan0366 | |
| Quotation from George Angus & Co Ltd for the supply of Angus Oil Seals. | 22th Dec 1937 | Box 84 \ 4 scan0367 | |
| Letter from a bearing company detailing revised bearing capacities and formulas for specific engine models. | 29th Dec 1937 | Box 84 \ 4 scan0368 | |
| Letter from Ransome & Marles Bearing Co. Ltd. detailing bearing capacities and specifications. | 29th Dec 1937 | Box 84 \ 4 scan0369 | |
| Letter from Ransome & Marles Bearing Co. detailing bearing capacities and ratings for the Bensport & Peregrine 2. | 29th Dec 1937 | Box 84 \ 4 scan0370 | |
| Letter from Ransome & Marles Bearing Co. Ltd. detailing the load capacities for several special MDJT bearings. | 29th Dec 1937 | Box 84 \ 4 scan0371 | |
| Test report on a Bentley rear axle pinion, run deliberately misaligned to test for failure. | 13th Jan 1938 | Box 84 \ 4 scan0372 | |
| Damaged thrust races, chipped balls, and crumpled front suspension packing washers from a Phantom III. | 9th Feb 1938 | Box 84 \ 4 scan0373 | |
| Letter to Messrs Ransome & Marles Bearing Co. Ltd. to arrange a visit to discuss ball bearing troubles. | 18th Feb 1938 | Box 84 \ 4 scan0374 | |
| Requesting the return of 5 failed bearings to Messrs. Ransome & Marles Bearing Co. Ltd. for examination. | 28th Feb 1938 | Box 84 \ 4 scan0375 | |
| Letter concerning the return of 5 failed pinion bearings and a request for a new bearing for testing. | 28th Feb 1938 | Box 84 \ 4 scan0376 | |
| Requesting to test a new Bentley back axle pinion bearing on a trials car. | 28th Feb 1938 | Box 84 \ 4 scan0377 | |
| Supply of a Bentley back axle pinion bearing for a trials car. | 1st Mar 1938 | Box 84 \ 4 scan0378 | |
| And sketch regarding machining clearance for new 10/43 ratio rear axle gears on the Bentley II.A. | 2nd Mar 1938 | Box 84 \ 4 scan0379 | |
| The dispatch of Bentley Rear Axle parts for a trials car. | 4th Mar 1938 | Box 84 \ 4 scan0380 | |
| Alternatives for utilizing obsolete Bentley rear axle bevel pinions to avoid scrapping them. | 23th Mar 1938 | Box 84 \ 4 scan0381 | |
| Instructions for rig tests on a Bentley II rear axle bearing to reproduce cage failures. | 25th Mar 1938 | Box 84 \ 4 scan0382 | |
| Failure of axle pinion ball bearing cages, proposing alternative materials and heat treatments. | 29th Apr 1938 | Box 84 \ 4 scan0383 | |
| Weight comparison list for Semi-Floating and Fully Floating Bentley rear axles and their components. | 13th Jul 1938 | Box 84 \ 4 scan0384 | |
| Reclamation scheme and testing for scored outboard bearings on Bentley II rear axle pinions. | 15th Jul 1938 | Box 84 \ 4 scan0385 | |
| Letter to Ransome & Marles Bearing Co. Ltd. regarding tests on Bentley rear axle pinion bearings. | 18th Jul 1938 | Box 84 \ 4 scan0386 | |
| The testing of reclaimed Bentley II rear axle pinions. | 18th Jul 1938 | Box 84 \ 4 scan0387 | |
| Testing of a reclaimed and modified sample pinion for a Bentley rear axle. | 19th Jul 1938 | Box 84 \ 4 scan0388 | |
| Clarifying a misunderstanding about the design and modification of rear axle bevel pinions. | 20th Jul 1938 | Box 84 \ 4 scan0389 | |
| Letter to F.O. Hickling of Ransome & Marles Bearing Co. Ltd. regarding the ordering of bearings. | 21th Jul 1938 | Box 84 \ 4 scan0390 | |
| Letter from Ransome & Marles Bearing Co. regarding the status of tests on Bentley rear axle pinion bearings. | 20th Jul 1938 | Box 84 \ 4 scan0391 | |
| Copy of a letter to F.O. Hickling of Ransome & Marles Bearing Co. Ltd. about coordinating an order for bearings. | 21th Jul 1938 | Box 84 \ 4 scan0392 | |
| Order for 12 special Bentley axle bearings be sent to Messrs. Ransome & Marles. | 8th Aug 1938 | Box 84 \ 4 scan0393 | |
| Letter requesting 12 standard type Bentley axle pinion bearings from Ransome & Marles Bearing Co. Ltd. | 8th Aug 1938 | Box 84 \ 4 scan0394 | |
| Comparison of weights between 4¼-Litre Bentley Fully Floating and Semi-Floating axles. | 10th Aug 1938 | Box 84 \ 4 scan0395 | |
| Weight comparison between different wheel, hub, and axle configurations. | 10th Aug 1938 | Box 84 \ 4 scan0396 | |
| Letter from a bearing manufacturer confirming a specific order for Bentley Axle Pinion Bearings. | 12th Aug 1938 | Box 84 \ 4 scan0397 | |
| Letter from Ransome & Marles Bearing Co. Ltd. confirming delivery of modified bearings. | 22th Aug 1938 | Box 84 \ 4 scan0398 | |
| Letter to Fischer Bearings Company regarding a pinion bearing failure in a Bentley back axle, requesting samples and a quotation. | 27th Aug 1938 | Box 84 \ 4 scan0399 | |
| Letter from Fischer Bearings acknowledging a request for a quote on pinion bearings for a Bentley back axle. | 29th Aug 1938 | Box 84 \ 4 scan0400 | |
| Investigations into customer complaints of bearing failures on the Bentley II rear axle, recommending changes to preload and cage design. | 5th Sep 1938 | Box 84 \ 4 scan0401 | |
| Agreement to standardize the improved rear axle pinion bearing for the Bentley 11. | 13th Sep 1938 | Box 84 \ 4 scan0402 | |
| The standardisation of a modified Bentley axle pinion bearing. | 27th Sep 1938 | Box 84 \ 4 scan0403 | |
| Analysis of using a 4.6 ratio on a .650 offset Bentley fully floating axle. | 4th Oct 1938 | Box 84 \ 4 scan0404 | |
| Table comparing maximum pinion tooth stresses and load per inch face for various axle configurations. | 4th Oct 1938 | Box 84 \ 4 scan0405 | |
| Routing slip for a file concerning rear axles for all cars. | 7th Oct 1938 | Box 84 \ 4 scan0406 | |
| Pinion failure on a Bentley axle during testing and the request for replacement parts for further tests. | 3rd Nov 1938 | Box 84 \ 4 scan0407 | |
| Requesting two pairs of gears for a rear axle to be tested to destruction. | 19th Nov 1938 | Box 84 \ 4 scan0408 | |
| Procurement of cutters for Bentley rear axle gears for Paulin type cars. | 16th Feb 1939 | Box 84 \ 4 scan0409 | |
| Non-standard features of the 6.B.IV. rear axle. | 8th Jan 1940 | Box 84 \ 4 scan0410 | |
| Bentley Rear Axle Arrangement Drawing, confirming it is pre-war and sending prints as the originals are in 'Cold Storage'. | 19th Jan 1944 | Box 84 \ 4 scan0411 | |
| Testing and performance of unequalized rear brakes on a Bentley. | 8th Jan 1936 | Box 85 \ 1 scan0001 | |
| Switch to 0.9% Carbon Steel for Bentley brake drums due to quality deterioration of the 'Millenite' material from a supplier. | 10th Jan 1936 | Box 85 \ 1 scan0002 | |
| List of brake experiments showing the status and intended vehicle for various components. | 11th Jan 1936 | Box 85 \ 1 scan0003 | |
| Log of brake system modifications and component fittings on various vehicles. | 11th Jan 1936 | Box 85 \ 1 scan0004 | |
| Laboratory memorandum detailing the chemical composition and casting process for special test bars related to brake drums. | 13th Jan 1936 | Box 85 \ 1 scan0005 | |
| Re-lining the rear brakes on car 1-B-IV to test Ferodo S.5805 linings against standard drums. | 20th Jan 1936 | Box 85 \ 1 scan0006 | |
| Request to despatch various Bentley brake drum components to Ferodo Ltd. for testing. | 23th Jan 1936 | Box 85 \ 1 scan0007 | |
| Requesting a cost comparison of various Bentley aluminium and Millenite brake drums. | 23th Jan 1936 | Box 85 \ 1 scan0008 | |
| Road test results and modifications for Bentley rear aluminium composite brake drums. | 24th Jan 1936 | Box 85 \ 1 scan0009 | |
| Trial and implementation of Bentley front aluminium composite brake drums. | 24th Jan 1936 | Box 85 \ 1 scan0010 | |
| Testing and an order modification for Bentley rear aluminium composite brake drums. | 25th Jan 1936 | Box 85 \ 1 scan0011 | |
| Re-allocating 0.9% Carbon steel Bentley brake drums from experimental car B-23-AE to 4-B-IV. | 31th Jan 1936 | Box 85 \ 1 scan0012 | |
| Overheating of brake drums on the 4¼ litre Bentley and proposing testing aluminium composite alternatives from Hispano-Suiza. | 31th Jan 1936 | Box 85 \ 1 scan0013 | |
| Heavier solid drum mock-up and requesting information on light alloy drums. | 31th Jan 1936 | Box 85 \ 1 scan0014 | |
| Graph showing the coefficient of friction versus temperature for 0.3% Carbon Steel. | 14th Jan 1936 | Box 85 \ 1 scan0015 | |
| Chart comparing temperature and wear of Millenite vs Aluminium-Steel composite rear brake drums on a 4¼ Litre Bentley. | 14th Jan 1936 | Box 85 \ 1 scan0016 | |
| Communication requesting a specific parts list for Aluminium Composite Brake Drums. | 3rd Feb 1936 | Box 85 \ 1 scan0017 | |
| Testing method and parts required for Aluminium Composite Brake Drums, referencing Hispano-Suiza and Bentley components. | 4th Feb 1936 | Box 85 \ 1 scan0018 | |
| Cost request for the production of an Aluminium-Cast-Iron Composite Drum and Bentley brake shoes. | 6th Feb 1936 | Box 85 \ 1 scan0019 | |
| Letter regarding Hispano-Suiza brake drum materials being sent for testing and customs purposes. | 8th Feb 1936 | Box 85 \ 1 scan0020 | |
| Instructions for machining and laboratory testing of Bentley rear brake drums made from 'Lopaz' material. | 11th Feb 1936 | Box 85 \ 1 scan0021 | |
| Trial to manufacture a 0.8% carbon steel ring for Bentley rear aluminium composite brake drums. | 12th Feb 1936 | Box 85 \ 1 scan0022 | |
| Cost comparison memo for a proposed Aluminium-Cast-Iron Composite Brake Drum for a Bentley Chassis. | 6th Feb 1936 | Box 85 \ 1 scan0023 | |
| The despatch of Hispano-Suiza brake components. | 18th Feb 1936 | Box 85 \ 1 scan0024 | |
| The sending and requesting of Hispano-Suiza brake components. | 18th Feb 1936 | Box 85 \ 1 scan0025 | |
| The decision to fit Bentley rolling toggles and steel shoes to car 1-B-IV. | 20th Feb 1936 | Box 85 \ 1 scan0026 | |
| Instructions regarding the construction and fitting of Bentley composite brake drums. | 20th Feb 1936 | Box 85 \ 1 scan0027 | |
| The fabrication of steel liner rings for Bentley rear aluminium composite brake drums. | 28th Feb 1936 | Box 85 \ 1 scan0028 | |
| The development of new aluminium brake drums for Bentley cars to improve performance. | 4th Mar 1936 | Box 85 \ 1 scan0029 | |
| The development and performance of Bentley Aluminium Composite Brake Drums. | 4th Mar 1936 | Box 85 \ 1 scan0030 | |
| Summary of the reasons for the effectiveness of aluminium drums in dissipating heat. | 4th Mar 1936 | Box 85 \ 1 scan0031 | |
| The construction and testing of composite brake drums and their liners. | 4th Mar 1936 | Box 85 \ 1 scan0032 | |
| Brake drum interference fits, materials, and a comparison of various drum designs. | 4th Mar 1936 | Box 85 \ 1 scan0033 | |
| Table of wear test results for linings under different test numbers and temperatures. | 4th Mar 1936 | Box 85 \ 1 scan0034 | |
| Graph showing the coefficient of friction versus temperature for S3 0.3% carbon steel. | 14th Jan 1936 | Box 85 \ 1 scan0035 | |
| Chart comparing the rear brake drum temperatures of a 4¼ Litre Bentley under icy conditions. | 14th Jan 1936 | Box 85 \ 1 scan0036 | |
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