| Description | Date | Identifier | |
| Letter acknowledging a memo about troubles with Bentley rear brake mechanisms. | 16th Feb 1938 | Box 102 \ 6 scan0169 | |
| Modifications to Bentley rear brakes regarding the floating fulcrum bush, heat treatment, and plating of pins. | 9th Feb 1938 | Box 102 \ 6 scan0170 | |
| Letter concerning a seized brake mechanism on a Bentley 3 1/2 & 4 1/4 Litre chassis, detailing an investigation and potential modifications. | 27th Jan 1938 | Box 102 \ 6 scan0171 | |
| Decision to scrap existing MR brake linings in stock for an improved type. | 11th Feb 1938 | Box 102 \ 6 scan0172 | |
| Disappointments with BZ brake lining material and new experiments with MR.3. | 16th Feb 1938 | Box 102 \ 6 scan0173 | |
| Brake lining issues, specifically groaning and squeaking, on a Bentley car. | 10th Feb 1938 | Box 102 \ 6 scan0174 | |
| Letter to Bentley Motors Ltd. regarding the creation of cutters for machining brake linings. | 20th Jan 1938 | Box 102 \ 6 scan0175 | |
| Photograph of a mechanical assembly, possibly a test rig, with weights on the left and a plunger or pump on the right. | 15th Nov 1937 | Box 102 \ 6 scan0176 | |
| Customer complaint of a groaning offside rear brake, found to be a cracked drum. | 15th Nov 1937 | Box 102 \ 6 scan0177 | |
| Ongoing issues with seizing rear foot and hand brake shoes on Bentley vehicles. | 6th Oct 1937 | Box 102 \ 6 scan0178 | |
| Letter concerning the design and supply of springs for Bentley pivoted brake shoes, and a report on a chassis breakdown. | 4th Oct 1937 | Box 102 \ 6 scan0179 | |
| Letter detailing repairs on several customer chassis, workshop capacity issues at Rue Gide, and personal travel notes. | 4th Oct 1937 | Box 102 \ 6 scan0180 | |
| Memo discussing inconsistent load requirements for Bentley tipping shoes and brake squeak. | 28th May 1937 | Box 102 \ 6 scan0181 | |
| Prevention of brake squeaks on Bentley & 25/30 models. | 20th May 1937 | Box 102 \ 6 scan0182 | |
| Memo discussing an investigation into brake squeaks and the failure of a pilot shoe spring design. | 28th May 1937 | Box 102 \ 6 scan0183 | |
| The increase of a die size to achieve a lower spring rating and a comment on production parts. | 19th Aug 1937 | Box 102 \ 6 scan0184 | |
| Urgent internal memo requesting the latest brake linings for a car with brake squeaks. | 19th Aug 1937 | Box 102 \ 6 scan0185 | |
| Confirming the dispatch of B.Z. brake linings for a Bentley with bad brake squeaks. | 21th Aug 1937 | Box 102 \ 6 scan0186 | |
| Identifying the grease used for lubricating mechanical features inside brake drums. | 5th Aug 1937 | Box 102 \ 6 scan0187 | |
| Clearance issues on Raymond Mays' Bentley B.24.GA after fitting larger brake drums. | 23th Jun 1937 | Box 102 \ 6 scan0188 | |
| Delay in obtaining new springs for a Bentley pivoted brake shoe, suggesting an alternative source in Paris. | 27th Jul 1937 | Box 102 \ 6 scan0189 | |
| The fitting of 35° cams and brake adjustments to the Bentley London Trials Car B.119.JY. | 15th Jun 1937 | Box 102 \ 6 scan0190 | |
| Fitting 35° cams to London Trials Saloon B.119.JY before a test. | 9th Jun 1937 | Box 102 \ 6 scan0191 | |
| Successful testing of front brakes on chassis B.122.GA for Mr. F. Lang. | 12th Jul 1937 | Box 102 \ 6 scan0192 | |
| Investigation into slack and wear issues on an Inertia Balance Lever Assembly for a Bentley Chassis. | 14th Aug 1937 | Box 102 \ 6 scan0193 | |
| Brake squeak issues on Bentley cars, potential solutions, and related staffing. | 18th Dec 1936 | Box 102 \ 6 scan0194 | |
| Maximum safe diameter for skimming brake drums before they must be scrapped. | 12th Feb 1937 | Box 102 \ 6 scan0195 | |
| Query regarding the safety thickness limits for skimming brake drums for service use. | 11th Feb 1937 | Box 102 \ 6 scan0196 | |
| Production practices for brake linings, comparing the company's methods with those of other firms. | 31th Mar 1937 | Box 102 \ 6 scan0197 | |
| Methods for attaching brake linings, including a tool for stretching and an alternative cement-based scheme. | 31th Mar 1937 | Box 102 \ 6 scan0198 | |
| Recurring issue with rubbing rear brake drums on Bentley cars and a proposed solution. | 1st Feb 1937 | Box 102 \ 6 scan0199 | |
| Investigation and alteration concerning rubbing in Bentley rear brake drums. | 6th Feb 1937 | Box 102 \ 6 scan0200 | |
| Investigation of a rattling front brake inertia balancing device on a Bentley. | 2nd Apr 1937 | Box 102 \ 6 scan0201 | |
| Instructions to manufacture and supply a new Distance Piece (GB.2407) for the brake system. | 25th Aug 1936 | Box 102 \ 6 scan0202 | |
| Issues with Bentley front aprons and rear brake drums. | 13th Feb 1937 | Box 102 \ 6 scan0203 | |
| Instruction to replace rusted rear brake anchorage steel bushes with cadmium-plated ones on Bentley & 20/25 HP models. | 16th Dec 1936 | Box 102 \ 6 scan0204 | |
| Practical reasons for brake squeaks and the factors contributing to them. | 15th Dec 1936 | Box 102 \ 6 scan0205 | |
| Analysis of brake system issues, including liner bedding, tipping shoes, and material performance. | 15th Dec 1936 | Box 102 \ 6 scan0206 | |
| Three methods for curing brake squeaks. | 15th Dec 1936 | Box 102 \ 6 scan0207 | |
| Scheme to address seizing rear brake actuating shafts on a Bentley chassis. | 24th Aug 1936 | Box 102 \ 6 scan0208 | |
| Complaint of rear brakes binding due to lack of lubrication on Bentley and other models. | 2nd Oct 1936 | Box 102 \ 6 scan0209 | |
| Modification to the lubrication of the rear brake actuating shaft for a Bentley. | 6th Nov 1936 | Box 102 \ 6 scan0210 | |
| Bentley Chassis 6-B-1V, detailing an issue with the servo motor and material alterations to the levers. | 12th Nov 1936 | Box 102 \ 6 scan0211 | |
| Requesting investigation into serious complaints regarding binding brakes on Bentley cars. | 27th Oct 1936 | Box 102 \ 6 scan0212 | |
| Complaint investigation regarding Bentley brake shoe bushes, resulting in a design change from bronze to nickel steel. | 17th Aug 1936 | Box 102 \ 6 scan0213 | |
| Bush diameter with a handwritten note about the use of Nickel Steel bushes. | 21th Aug 1936 | Box 102 \ 6 scan0214 | |
| Complaint regarding brake squeaks and inefficiency on a new Bentley chassis in Paris. | 17th Aug 1936 | Box 102 \ 6 scan0215 | |
| Internal memorandum regarding an experimental modification to servo discs for chassis GNC.26 to address a squeaking issue. | 4th Oct 1938 | Box 102 \ 6 scan0216 | |
| Broken ball pin from a Bentley front axle control. | 13th Oct 1937 | Box 102 \ 6 scan0217 | |
| The return of two faulty Bentley front anchorage brackets for inspection due to a design flaw. | 23th Jun 1937 | Box 102 \ 6 scan0218 | |
| Complaint about the excessive width of slots on Bentley front anchorage brackets. | 29th Jun 1937 | Box 102 \ 6 scan0219 | |
| The use of low carbon case hardened contacts for cross steering tubes and front axle controls, based on Bentley's design. | 3rd Feb 1937 | Box 102 \ 6 scan0220 | |
| Request for axle control parts to be sent to Kingsbury and Cricklewood. | 18th Nov 1936 | Box 102 \ 6 scan0221 | |
| Investigation into a complaint regarding a broken drill piece found wedged in a Bentley front axle oil feed hole. | 12th Apr 1937 | Box 102 \ 6 scan0222 | |
| Repairs and highlighting issues with Bentley front axle controls, based on an extract from the Paris Depot repair lists. | 19th Jun 1936 | Box 102 \ 6 scan0223 | |
| Persistent slipping clutch issues on the 20/25 HP model, listing affected owners and querying replacement spring strengths. | 4th Jan 1933 | Box 103 \ 1 scan0001 | |
| Cause of slipping clutches on the 20/25 HP model, identifying a glazed condition and a small design safety margin as the problems. | 13th Jan 1933 | Box 103 \ 1 scan0002 | |
| Investigation and proposed solutions for slipping clutches on the 20/25 HP model. | 16th Jan 1933 | Box 103 \ 1 scan0003 | |
| Covering memo regarding an issue with slipping clutches on the 20/25 HP model. | 16th Jan 1933 | Box 103 \ 1 scan0004 | |
| Slipping clutch complaints on the 20/25 HP model, particularly regarding synchromesh cars. | 12th Jan 1933 | Box 103 \ 1 scan0005 | |
| Issues with a slipping clutch on the 20/25 HP model. | 13th Jan 1933 | Box 103 \ 1 scan0006 | |
| Frequency and seriousness of slipping clutch issues on the 20/25 HP model. | 18th Jan 1933 | Box 103 \ 1 scan0007 | |
| Sample fabrics, lubrication holes, and a slipping clutch issue. | 19th Jan 1933 | Box 103 \ 1 scan0008 | |
| Lack of evidence for faulty design regarding 25 HP slipping clutch complaints. | 19th Jan 1933 | Box 103 \ 1 scan0009 | |
| Laboratory report on tests conducted on new and used friction rings for a 20 HP clutch. | 20th Jan 1933 | Box 103 \ 1 scan0010 | |
| Urgent request to dismantle a clutch to investigate a binding issue with the presser plate. | 30th Jan 1933 | Box 103 \ 1 scan0011 | |
| Investigating complaints of slipping clutches on the 25 HP model. | 31th Jan 1933 | Box 103 \ 1 scan0012 | |
| Clutch serrations, clearance issues, and the design of the 25 HP clutch. | 31th Jan 1933 | Box 103 \ 1 scan0013 | |
| Suggestion and testing of a damped flexible drive for the clutch on a 25HP car. | 2nd Feb 1933 | Box 103 \ 1 scan0014 | |
| Tests to resolve a clutch slipping issue on car 19-G-IV by increasing teeth clearance. | 4th Feb 1933 | Box 103 \ 1 scan0015 | |
| Request to manufacture four modified clutch spring drives for the 20/25 HP model, with specific changes to hole diameters and spring wire gauge. | 8th Feb 1933 | Box 103 \ 1 scan0016 | |
| Reasons for slipping clutches on 20/25's models. | 14th Feb 1933 | Box 103 \ 1 scan0017 | |
| Request for a set of springs for a J.III clutch, detailing a modification required to the spring guide. | 17th Feb 1933 | Box 103 \ 1 scan0018 | |
| Specifications for a clutch spring. | 1st Mar 1933 | Box 103 \ 1 scan0019 | |
| Comparison of weights between the standard and low inertia flywheels for the 20/25HP model. | 1st Mar 1933 | Box 103 \ 1 scan0020 | |
| Drawings and performance of a reduced inertia clutch and spring damped plate clutch. | 7th Mar 1933 | Box 103 \ 1 scan0021 | |
| Cross-section drawing of a flywheel modification, showing dimensions and weight saving calculations. | 7th Mar 1933 | Box 103 \ 1 scan0022 | |
| Blueprint showing the design and specifications for a clutch damper spring drive. | 7th Mar 1933 | Box 103 \ 1 scan0023 | |
| Standardising the J.III clutch by fitting a 20/25 synchromesh gearbox. | 22th Mar 1933 | Box 103 \ 1 scan0024 | |
| Three methods to reduce clutch pedal pressure on the 25HP and J.3 clutches. | 5th Apr 1933 | Box 103 \ 1 scan0025 | |
| Requirements for fitting a new flywheel and clutch to the J.III model. | 19th Apr 1933 | Box 103 \ 1 scan0026 | |
| Blueprint showing a cross-section for a needle bearing clutch operation. | 19th Apr 1938 | Box 103 \ 1 scan0027 | |
| Issues with failing clutches on the 20/25 model and engine gear rattles on Bentley cars. | 1st Aug 1933 | Box 103 \ 1 scan0028 | |
| Investigation into complaints of slipping clutches on 20/25 cars. | 1st Aug 1933 | Box 103 \ 1 scan0029 | |
| Customer complaints regarding clutch adjustment and a proposal for a suitable external adjustment method. | 4th Aug 1933 | Box 103 \ 1 scan0030 | |
| Modification for a 20/25 model clutch slip, suggesting a new testing method. | 4th Aug 1933 | Box 103 \ 1 scan0031 | |
| Semi-automatic clutch control scheme for a 25 HP car. | 9th Aug 1933 | Box 103 \ 1 scan0032 | |
| Previous communication on a 20/25 HP Clutch Slip and clarification of recipient symbols. | 9th Aug 1933 | Box 103 \ 1 scan0033 | |
| Responding to a suggestion for a 25 HP Clutch Control, agreeing to test the feature. | 10th Aug 1933 | Box 103 \ 1 scan0034 | |
| 20/25 HP clutch slip, seeking clarification on the intended recipient of a prior memo. | 23th Aug 1933 | Box 103 \ 1 scan0035 | |
| 20/25 HP clutch slip and an enquiry about the availability of a gauge. | 23th Aug 1933 | Box 103 \ 1 scan0036 | |
| 20/25 HP clutch slip and a request for a circular gauge to test the clutch serrations. | 21th Aug 1933 | Box 103 \ 1 scan0037 | |
| Vibration issue in the transmission of the 20/25 HP chassis. | 23th Aug 1933 | Box 103 \ 1 scan0038 | |
| Of apology for a misdirected memo and clarification on a potential typo causing filing confusion. | 24th Aug 1933 | Box 103 \ 1 scan0039 | |
| Clutch slip on the 20/25 model and a request for a drawing of a circular gauge. | 28th Aug 1933 | Box 103 \ 1 scan0040 | |
| 20/25 HP Clutch Slip and a follow-up on a circular gauge. | 13th Sep 1933 | Box 103 \ 1 scan0041 | |
| Servo-assisted clutch for a 20/25 car to decrease pedal pressure, referencing a previous Bendix system. | 18th Sep 1933 | Box 103 \ 1 scan0042 | |
| Cover memo for Standardisation Sheet No.X5300 regarding a Spring Drive in a 20/25 HP clutch. | 20th Sep 1933 | Box 103 \ 1 scan0043 | |
| New spring drive in the clutch for the 20/25 HP model to address customer complaints, noting it is also standard on the 3 1/2 Litre Bentley. | 23th Sep 1933 | Box 103 \ 1 scan0044 | |
| Changing the surface treatment of 20/25 clutch parts to Parkerising. | 27th Sep 1933 | Box 103 \ 1 scan0045 | |
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