| Description | Date | Identifier | |
| Parts list with an instruction to manufacture one set. | 16th Dec 1937 | Box 111 \ 3 scan0194 | |
| Parts list for two blueprints of Bentley 50 Brakes (unassisted) on Bentley 11. | 16th Dec 1937 | Box 111 \ 3 scan0195 | |
| List of blueprints and parts for modifying Bentley 50 (unassisted) brakes on a Bentley 11. | 20th Dec 1937 | Box 111 \ 3 scan0196 | |
| Instructions for fitting Bentley 50 unassisted brakes to a Bentley 11, listing required blueprints and parts. | 20th Dec 1937 | Box 111 \ 3 scan0197 | |
| Parts list for fitting Bentley 50 un-assisted brakes onto a Bentley 11. | 22th Dec 1937 | Box 111 \ 3 scan0198 | |
| The dispatch of two blueprints for Bentley 50 Brakes, specifically for frame drilling and the rear engine suspension crossmember. | 24th Dec 1937 | Box 111 \ 3 scan0199 | |
| Parts for Bentley 50 brakes and front/rear hubs on Bentley 11.A. | 14th Jan 1938 | Box 111 \ 3 scan0200 | |
| Parts changes and blueprint distribution for Bentley 50 unassisted brakes on the Bentley 11.A model. | 14th Jan 1938 | Box 111 \ 3 scan0201 | |
| Request for blueprints of front brake components for the Bentley 50 (unassisted) brakes on a Bentley 11.A. | 23th Feb 1938 | Box 111 \ 3 scan0202 | |
| Blueprints for a steady spring for the hand brake lever on a Bentley 50 chassis. | 8th Apr 1938 | Box 111 \ 3 scan0203 | |
| List of drawings and parts required for the Bentley 50 Brakes (unassisted) on a Bentley 11. | 26th Apr 1938 | Box 111 \ 3 scan0204 | |
| Design and fitting of an oil dash pot for Bentley III & Bentley 50 brakes. | 14th May 1938 | Box 111 \ 3 scan0205 | |
| Scheme of modifications and required parts for a Bentley 50 1st Experimental Chassis. | 14th May 1938 | Box 111 \ 3 scan0206 | |
| Requesting the issue of a drawing for a support bracket (FB.3829) to be used on an experimental chassis. | 14th May 1938 | Box 111 \ 3 scan0207 | |
| The high cost of B.III & 50 brake shoes and a proposal to switch to a cheaper welded construction. | 31th May 1938 | Box 111 \ 3 scan0208 | |
| Accompanying blueprints for the Bentley 50 chassis, detailing the hand brake and change gear lever positions. | 7th Apr 1938 | Box 111 \ 3 scan0209 | |
| Manufacturing difficulty of a suspension rod for the B.50 brakes rear equalizer. | 9th Jun 1938 | Box 111 \ 3 scan0210 | |
| Note regarding excessive whip in the brake rod for the B.50 chassis and a suggested fix for trial. | 21th Jun 1938 | Box 111 \ 3 scan0211 | |
| Urgent internal memo regarding the replacement of weak brake parts on Bentley III and SO models to prevent an accident. | 12th Jul 1938 | Box 111 \ 3 scan0212 | |
| Request to make two support rods ExS.887/8/9 for the Bentley III & 50 Equalizer, noting a change in construction. | 18th Jul 1938 | Box 111 \ 3 scan0213 | |
| Replacement of four thin anchor plates with a new single thick anchor plate for the Bentley 50's rear brake equalisers. | 19th Jul 1938 | Box 111 \ 3 scan0214 | |
| Parts for a modification to the Bentley 50 brake system. | 19th Jul 1938 | Box 111 \ 3 scan0215 | |
| Continued list of part number replacements and instructions for purchasing rods. | 19th Jul 1938 | Box 111 \ 3 scan0216 | |
| Necessary changes to the Bentley III & 50 brake system. | 30th Aug 1938 | Box 111 \ 3 scan0217 | |
| Instruction to replace a car's servo lining with an available part. | 31th Aug 1938 | Box 111 \ 3 scan0218 | |
| Request for a structural assessment on a new spindle for B.III & B.50 rear brakes. | 1st Sep 1938 | Box 111 \ 3 scan0219 | |
| Necessary adjustments for the Bentley III & 50 brakes. | 5th Sep 1938 | Box 111 \ 3 scan0220 | |
| Failures and necessary adjustments for a vehicle's servo, brakes, and expander housing. | 5th Sep 1938 | Box 111 \ 3 scan0221 | |
| Instructing to fit stiffening plates PD.275 to the rear brakes of cars 7.B.V. and 1.B.50. | 11th Oct 1938 | Box 111 \ 3 scan0222 | |
| Instructing the addition of a water shield to the hand brake lever on specific car models. | 11th Nov 1938 | Box 111 \ 3 scan0223 | |
| Requesting the conversion of car 2.B.50 to hydraulic brakes before it is sent to France. | 30th Nov 1938 | Box 111 \ 3 scan0224 | |
| Recommendations for brake materials and adjustments for Bentley V and 50 chassis. | 23th Jan 1939 | Box 111 \ 3 scan0225 | |
| Calculations and modifications to address complaints of insufficient front brakes and the ease of back brake locking. | 23th Jan 1939 | Box 111 \ 3 scan0226 | |
| Brake lever alterations, component wear, and efficiency analysis for B.V. models. | 23th Jan 1939 | Box 111 \ 3 scan0227 | |
| Lining of Girling two-leading shoe brakes for a Bentley V & 50. | 21th Mar 1939 | Box 111 \ 3 scan0228 | |
| Fitment of a hydraulic master cylinder for hydraulic brakes on specific chassis. | 4th May 1939 | Box 111 \ 3 scan0229 | |
| Proposing a series of tests on the J.B.30 chassis, focusing on brake judder, wear, and cooling. | 24th Dec 1940 | Box 111 \ 3 scan0230 | |
| Outlining tests for wheel hub separation, aluminium drum cooling, and a mechanical petrol pump. | 24th Dec 1940 | Box 111 \ 3 scan0231 | |
| Visit to Ferodos to discuss brake linings, specifically regarding high temperatures and squeaking. | 8th Jan 1941 | Box 111 \ 3 scan0232 | |
| Specification revision for Bentley Chassis 3-B-50, detailing the fitting of a new Hydraulic Master Cylinder. | 2nd Sep 1943 | Box 111 \ 3 scan0233 | |
| Impressive durability, performance and consumption of a rationalised 6-cylinder class car after 80,000 miles. | 2nd Sep 1943 | Box 111 \ 3 scan0234 | |
| Short internal memo from 'Sg.' to 'Rm.' regarding interest in borrowing car 3-B-50 for a long run. | 4th Sep 1943 | Box 111 \ 3 scan0235 | |
| Confidential letter to coachbuilder Park Ward & Co. Ltd. regarding a modernized front-end design for car 4.B.50. | 28th Mar 1939 | Box 111 \ 4 scan0001 | |
| Page two of a letter from the Chief Engineer of Chassis regarding the supply of a modernised bumper. | 29th Mar 1939 | Box 111 \ 4 scan0002 | |
| List of required accessories for the Bentley 'Cresta' car, chassis 4.B.50. | 29th Mar 1939 | Box 111 \ 4 scan0003 | |
| Proposal for a semi-floating rear axle design for the Bentley 50, discussing advantages and construction options. | 25th Oct 1937 | Box 111 \ 4 scan0004 | |
| Wheel bearing, shaft, and wheel design options for various car models. | 25th Oct 1937 | Box 111 \ 4 scan0005 | |
| Comparative table of specifications for half-floating axles on various car models. | 25th Oct 1937 | Box 111 \ 4 scan0006 | |
| Blueprint showing the overhang for an upset axle. | 10th Dec 1937 | Box 111 \ 4 scan0007 | |
| Technical memo discussing a simplified crown wheel mounting design for the back axle of Bentley and Wraith cars. | 10th Dec 1937 | Box 111 \ 4 scan0008 | |
| Comparison and stress analysis of a proposed half-floating rear axle for Bentley B.50 and Wraith models against a Cadillac axle. | 16th Dec 1937 | Box 111 \ 4 scan0009 | |
| Analysis of axle shaft and bearing design, comparing stresses with American manufacturers. | 16th Dec 1937 | Box 111 \ 4 scan0010 | |
| Comparison of half-floating rear axles between a Cadillac (60) and a proposed Bentley 50 axle fitted to a Wraith. | 16th Dec 1937 | Box 111 \ 4 scan0011 | |
| Tables comparing stress calculations for axle shafts under varying overhang and design conditions. | 29th Dec 1937 | Box 111 \ 4 scan0012 | |
| The axle shaft diameter for the B.50 and Wraith half-floating rear axle. | 29th Dec 1937 | Box 111 \ 4 scan0013 | |
| Procurement of Bentley 50 rear axle hypoid gears from America. | 11th Jan 1938 | Box 111 \ 4 scan0014 | |
| Semi-floating rear axle for the Bentley 50, its components, and potential use on other models. | 13th Jan 1938 | Box 111 \ 4 scan0015 | |
| Urgent order of Hypoid Gears from the U.S.A. for a Bentley 50 rear axle. | 1st Oct 1944 | Box 111 \ 4 scan0016 | |
| Confirming the decision to use a B.III fully floating axle on the 1st experimental B.50, cancelling a previous specification. | 20th Jan 1938 | Box 111 \ 4 scan0017 | |
| Technical memorandum regarding the design and specifications of the Bentley 50 rear axle. | 27th Jan 1938 | Box 111 \ 4 scan0018 | |
| Design alternatives and simplifications for the Bentley 50 rear axle. | 3rd Feb 1938 | Box 111 \ 4 scan0019 | |
| Responding to suggestions about the Bentley 50 Rear Axle, specifically regarding oil seals and guide cones. | 7th Feb 1938 | Box 111 \ 4 scan0020 | |
| Technical points related to the Bentley 50 Rear Axle. | 7th Feb 1938 | Box 111 \ 4 scan0021 | |
| Letter detailing car performance issues observed after a run from Dieppe, focusing on consumption and vibrations. | 8th Feb 1938 | Box 111 \ 4 scan0022 | |
| Suspension settings for Continental cars and a proposed change to the axle ratio. | 8th Feb 1938 | Box 111 \ 4 scan0023 | |
| Vehicle brake and steering performance. | 8th Feb 1938 | Box 111 \ 4 scan0024 | |
| Travel plans to Paris and a directive on B.50 axle gear ratios. | 9th Feb 1938 | Box 111 \ 4 scan0025 | |
| Proposal for a cost and weight-saving modification to the Bentley 50 axle PD.91. | 9th Feb 1938 | Box 111 \ 4 scan0026 | |
| Proposal and stress analysis for a B.50 rear axle centre casing, comparing an aluminium casing to a steel tube. | 10th Feb 1938 | Box 111 \ 4 scan0027 | |
| Technical memo discussing the pros and cons of an aluminium banjo type axle proposed for the Bentley 50. | 11th Feb 1938 | Box 111 \ 4 scan0028 | |
| Suitability of a one-piece cast aluminum axle casing compared to the existing design. | 16th Feb 1938 | Box 111 \ 4 scan0029 | |
| Modifications to the Bentley 50 rear axle centre casing for die casting. | 25th Feb 1938 | Box 111 \ 4 scan0030 | |
| Interchangeability of the rear axle from a Bentley III to a Bentley 50. | 10th Mar 1938 | Box 111 \ 4 scan0031 | |
| Issuing blueprints for a new test rear axle shaft and requesting an order for two shafts with different specifications. | 4th Apr 1938 | Box 111 \ 4 scan0032 | |
| Correct material and heat treatment specifications for semi-floating axle shafts. | 29th Apr 1938 | Box 111 \ 4 scan0033 | |
| Modification notice for the Bentley 50 semi-floating rear axle, concerning the stiffening of the half-shaft flange. | 24th May 1938 | Box 111 \ 4 scan0034 | |
| Preference for semi-floating axles over fully floating ones for models B.III and B.50. | 9th Jun 1938 | Box 111 \ 4 scan0035 | |
| Conference to review the design of the Bentley 50 rear axle and brakes. | 11th Jul 1938 | Box 111 \ 4 scan0036 | |
| Fitting and assembly criticisms for the Bentley 50 semi-floating axle. | 11th Jul 1938 | Box 111 \ 4 scan0037 | |
| Page of fitting and assembly criticisms with corresponding design remarks. | 11th Jul 1938 | Box 111 \ 4 scan0038 | |
| List of fitting and assembly criticisms with a section for design remarks. | 11th Jul 1938 | Box 111 \ 4 scan0039 | |
| List of fitting and assembly criticisms with a section for design remarks. | 12th Jul 1938 | Box 111 \ 4 scan0040 | |
| Two complaints regarding assembly and tolerance issues on the Bentley 50 rear axle. | 12th Jul 1938 | Box 111 \ 4 scan0041 | |
| Proposed modifications for the Bentley 50 Axle to reduce cost and facilitate manufacturing. | 20th Jul 1938 | Box 111 \ 4 scan0042 | |
| List of proposals concerning the Bentley 50 rear axle. | 16th Jul 1938 | Box 111 \ 4 scan0043 | |
| List of engineering proposals and corresponding remarks for various vehicle components. | 16th Jul 1938 | Box 111 \ 4 scan0044 | |
| List of numbered proposals for design modifications with a corresponding remarks column. | 16th Jul 1938 | Box 111 \ 4 scan0045 | |
| Review of fitting and assembly criticisms and production department remarks for a Bentley 50 semi-floating axle. | 16th Jul 1938 | Box 111 \ 4 scan0046 | |
| List of fitting and assembly criticisms and production department remarks on axle components. | 16th Jul 1938 | Box 111 \ 4 scan0047 | |
| List of fitting and assembly criticisms from the experimental department with remarks from the production department. | 8th Aug 1938 | Box 111 \ 4 scan0048 | |
| Test results on shrinkage temperatures and release loads for a Bentley 50 rear axle retaining ring. | 8th Aug 1938 | Box 111 \ 4 scan0049 | |
| The assembly of axle shafts, detailing interference fits and the process of shrinking on collars. | 8th Aug 1938 | Box 111 \ 4 scan0050 | |
| Inspection report on a Bentley 50 semi-floating type rear axle after a 100-hour dynamometer test. | 18th Aug 1938 | Box 111 \ 4 scan0051 | |
| Condition report on a vehicle's differential bevel wheel, adjusting washers, bearings, and suspension brackets. | 18th Aug 1938 | Box 111 \ 4 scan0052 | |
| Modifications for applying Timken roller bearings to the hypoid rear axle gears of a Bentley 50 chassis. | 25th Aug 1938 | Box 111 \ 4 scan0053 | |
| Letter to a supplier regarding the material composition of hypoid gears after they failed a dynamometer test. | 30th Aug 1938 | Box 111 \ 4 scan0054 | |
| Letter to Buck & Hickman Ltd. requesting an inspection of unsatisfactory Hypoid axle gears from America. | 30th Aug 1938 | Box 111 \ 4 scan0055 | |
| Photograph of a spiral bevel pinion and crown wheel gear set. | 1st Sep 1938 | Box 111 \ 4 scan0056 | |
| Letter from Buck & Hickman Ltd regarding an inspection of Hypoid Axle gears. | 2nd Sep 1938 | Box 111 \ 4 scan0057 | |
| Inspection report on a Bentley 50 rear axle following a dynamometer test. | 5th Sep 1938 | Box 111 \ 4 scan0058 | |
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