| Description | Date | Identifier | |
| Increase in spring load for a multiplate clutch to achieve higher torque. | 10th Apr 1933 | Box 85 \ 2 scan0013 | |
| Querying the proposed use of a new design for the Bensport Spring Driven Clutch Centre. | 4th May 1933 | Box 85 \ 2 scan0014 | |
| Problem with loose Bentley flywheel bolts and proposing immediate and future modifications. | 16th Jun 1933 | Box 85 \ 2 scan0015 | |
| Loose clutch trunnion thrust race nut on a Bentley and recommending a more positive locking device. | 27th Jun 1933 | Box 85 \ 2 scan0016 | |
| New scheme for the 3.5 litre Bentley crankshaft and flywheel to prevent them from coming loose. | 30th Jun 1933 | Box 85 \ 2 scan0017 | |
| Modification to the Bentley flywheel and crankshaft using a new drawing. | 1st Jul 1933 | Box 85 \ 2 scan0018 | |
| The operation and layout of a plate clutch in a Bensport car, referencing related drawings. | 3rd Jul 1933 | Box 85 \ 2 scan0019 | |
| Request to manufacture one locking ring for a Bentley clutch withdrawal housing, as per blueprint LeC.3554. | 4th Jul 1933 | Box 85 \ 2 scan0020 | |
| Bentley Flywheel Fixing issue, potential crankshaft breakages, and proposed modifications. | 5th Jul 1933 | Box 85 \ 2 scan0021 | |
| Locking device for a clutch trunnion ball race. | 7th Jul 1933 | Box 85 \ 2 scan0022 | |
| Recommendation on the production setting for the Bentley clutch spring drive damping load. | 11th Jul 1933 | Box 85 \ 2 scan0023 | |
| Modifications for the 3 1/2 Litre Bentley clutch pit ventilation system. | 13th Jul 1933 | Box 85 \ 2 scan0024 | |
| Confirming satisfaction with the improved Bentley flywheel fixing and its use for another 50 crankshafts. | 21th Jul 1933 | Box 85 \ 2 scan0025 | |
| Withdrawing a previous instruction regarding the Bentley flywheel fixing, pending the result of a 10,000-mile test. | 24th Jul 1933 | Box 85 \ 2 scan0026 | |
| Loose flywheel on a 3.5 Litre Bentley engine during unit testing. | 31th Jul 1933 | Box 85 \ 2 scan0027 | |
| Issues with the 3½ litre Bentley's flywheel fixing and slipper drive centre. | 31th Jul 1933 | Box 85 \ 2 scan0028 | |
| Proposed method for locking flywheel bolts on a 3 1/2 litre Bentley. | 1st Aug 1933 | Box 85 \ 2 scan0029 | |
| Blueprint showing the locking of flywheel bolts for a 3 1/2 Litre Bentley. | 1st Aug 1933 | Box 85 \ 2 scan0030 | |
| Flywheel issue on a 3 1/2 Litre Bentley. | 3rd Aug 1933 | Box 85 \ 2 scan0031 | |
| Confirming a modification to the flywheel fixing on an experimental Bentley engine. | 24th Aug 1933 | Box 85 \ 2 scan0032 | |
| Whistling noise from the Bentley Flywheel, proposing a modification to increase clearance. | 1st Sep 1933 | Box 85 \ 2 scan0033 | |
| Instruction regarding an experimental cure for a whistling flywheel on a Bentley by increasing side clearance. | 4th Sep 1933 | Box 85 \ 2 scan0034 | |
| Detail drawings for the Bentley multi-plate clutch to test flywheel period. | 6th Sep 1933 | Box 85 \ 2 scan0035 | |
| The testing of new Bentley clutch spring drives, detailing driving and damping loads. | 19th Sep 1933 | Box 85 \ 2 scan0036 | |
| Modification to the Bentley clutch spring drive to eliminate rattles and requesting new springs. | 6th Oct 1933 | Box 85 \ 2 scan0037 | |
| New clutch spring (GB.534X) for the 3.5 Litre Bentley, requesting a drawing be made for record purposes. | 10th Oct 1933 | Box 85 \ 2 scan0038 | |
| Query regarding the required distance piece for Bentley clutch damping springs. | 12th Oct 1933 | Box 85 \ 2 scan0039 | |
| Oil leak into the clutch pit of a Bentley B.6 unit and the fitting of an oil retaining device. | 17th Oct 1933 | Box 85 \ 2 scan0040 | |
| Request for the manufacture of three sets of distance pieces for a Bentley clutch spring drive. | 19th Oct 1933 | Box 85 \ 2 scan0041 | |
| Required driving and damping loads for a Bentley clutch spring drive to eliminate overrun rattles. | 20th Oct 1933 | Box 85 \ 2 scan0042 | |
| Incorrect load issue with Bentley clutch spring drives and a proposed interim solution. | 23th Oct 1933 | Box 85 \ 2 scan0043 | |
| Requesting to increase the flexibility of the Bentley flywheel by manufacturing two new flanges. | 24th Oct 1933 | Box 85 \ 2 scan0044 | |
| Blueprint of a flywheel ball bearing housing with key dimensions. | 1st Nov 1933 | Box 85 \ 2 scan0045 | |
| The increasing damping load on Bentley clutch spring drives and the proposal to run them in on a rig. | 1st Nov 1933 | Box 85 \ 2 scan0046 | |
| To revise the damping load setting for the clutch spring drive on Bentley & 20/25 models. | 14th Nov 1933 | Box 85 \ 2 scan0047 | |
| Use of a disc flywheel and Borg & Beck clutch on a Bentley, outlining necessary modifications. | 20th Nov 1933 | Box 85 \ 2 scan0048 | |
| Requesting the history and cause of failure for a clutch from a Bentley trials car. | 4th Dec 1933 | Box 85 \ 2 scan0049 | |
| Requesting the history of a faulty clutch from a Bentley trials car for inspection. | 4th Dec 1933 | Box 85 \ 2 scan0050 | |
| Recommendation on the damping load setting for the Bentley clutch spring drive to prevent rattle. | 4th Dec 1933 | Box 85 \ 2 scan0051 | |
| Directive regarding a change in the clutch spring drive damping load for the Bentley chassis. | 6th Dec 1933 | Box 85 \ 2 scan0052 | |
| Material change and lightening modification for a Bentley Clutch pressure member. | 6th Dec 1933 | Box 85 \ 2 scan0053 | |
| Failure of a Bentley clutch pressure member and proposals for material improvements. | 7th Dec 1933 | Box 85 \ 2 scan0054 | |
| Material changes for experimental rings, comparing mild steel, nickel steel and aluminium bronze. | 7th Dec 1933 | Box 85 \ 2 scan0055 | |
| Burst cast iron Bentley clutch pressure plate and a request to trial steel replacements. | 8th Dec 1933 | Box 85 \ 2 scan0056 | |
| Rapid wear on Bentley and 20/25 clutch linings due to incorrectly chamfered friction plates. | 19th Dec 1933 | Box 85 \ 2 scan0057 | |
| Requesting an alteration to drawings for forged steel pressure plates, specifying that splines should be hobbed, not ground. | 27th Dec 1933 | Box 85 \ 2 scan0058 | |
| Clutch pedal rattle on the 10,000-mile Bentley car, identifying the spherical mounting as the cause and requesting a new design. | 1st Jan 1934 | Box 85 \ 2 scan0059 | |
| Letter from Ferodo Limited discussing test results and performance characteristics of metallic (RAD.5) versus non-metallic (RAD.13) clutch discs. | 5th Jan 1934 | Box 85 \ 2 scan0060 | |
| Method and standard for locking Bentley flywheel nuts. | 9th Jan 1934 | Box 85 \ 2 scan0061 | |
| Examination of a driving disc and friction material from a Bentley Trials Car. | 12th Jan 1934 | Box 85 \ 2 scan0062 | |
| Letter from Ferodo Limited enclosing a sample clutch disc for testing in a servo motor. | 16th Jan 1934 | Box 85 \ 2 scan0063 | |
| Fitting an external adjustment for the clutch on Bentley models. | 22th Jan 1934 | Box 85 \ 2 scan0064 | |
| Reluctance to introduce a new method for locking flywheel nuts without further testing. | 23th Jan 1934 | Box 85 \ 2 scan0065 | |
| Differences between American and English vehicle design, specifically concerning clutches and gearboxes. | 24th Feb 1934 | Box 85 \ 2 scan0066 | |
| New clutch adjustment method via the outside pedal connecting rod for future production cars. | 12th Mar 1934 | Box 85 \ 2 scan0067 | |
| Destruction tests for a Bentley clutch to address rapid wear on production cars. | 14th Mar 1934 | Box 85 \ 2 scan0068 | |
| Inspection of a driving disc and friction material from a Bentley clutch after trials. | 14th Mar 1934 | Box 85 \ 2 scan0069 | |
| Directive to alter the clutch pressure plate design for Bentley and 20/25 HP chassis to prevent cracking. | 23th Mar 1934 | Box 85 \ 2 scan0070 | |
| Endurance tests on 20/25 and Bentley clutches, requesting the removal of crankshaft balance weights. | 27th Mar 1934 | Box 85 \ 2 scan0071 | |
| Requesting the production of additional clutch components for destruction and test bed tests. | 7th Apr 1934 | Box 85 \ 2 scan0072 | |
| Standardisation report for a Nickel Steel clutch pressure ring to overcome cracking. | 28th Mar 1934 | Box 85 \ 2 scan0073 | |
| Two customer complaints regarding clutch judder or transmission rattle on Bentley chassis. | 27th Apr 1934 | Box 85 \ 2 scan0074 | |
| Customer complaints regarding Bentley chassis clutch, gearbox, or transmission rattle. | 27th Apr 1934 | Box 85 \ 2 scan0075 | |
| Complaints about clutch, gearbox, or transmission rattle on the Bentley Chassis. | 1st May 1934 | Box 85 \ 2 scan0076 | |
| Experimental department report on clutches for 20/25 and Bentley models. | 23th May 1934 | Box 85 \ 2 scan0077 | |
| Clutch destruction tests, wear rates, and performance issues for 20/25 and Bentley models. | 23th May 1934 | Box 85 \ 2 scan0078 | |
| Experiments with flexible engine mountings and their effect on clutch operation, causing 'jaggering'. | 23th May 1934 | Box 85 \ 2 scan0079 | |
| Methodology and results of clutch tests for 20/25 and Bentley models. | 3rd May 1934 | Box 85 \ 2 scan0080 | |
| The comparative performance tests of different types of clutch linings. | 3rd May 1934 | Box 85 \ 2 scan0081 | |
| Results of wear tests on various clutch linings for a 25 HP & Bentley clutch. | 3rd May 1934 | Box 85 \ 2 scan0082 | |
| Test report table on the performance of different clutch lining materials under various heat and slip conditions. | 3rd May 1954 | Box 85 \ 2 scan0083 | |
| Comparative test report on different types of clutch lining materials and their performance. | 3rd May 1934 | Box 85 \ 2 scan0084 | |
| Blueprint detailing the modification of an existing flywheel S6671. | 21th Apr 1934 | Box 85 \ 2 scan0085 | |
| Clutch issue and ordering a thicker centre plate with increased cushioning for car 1-B-IV. | 26th May 1934 | Box 85 \ 2 scan0086 | |
| Need to fit a standard clutch to car EX.13800 as a replacement. | 28th May 1934 | Box 85 \ 2 scan0087 | |
| Requesting to fit a new, lightened 20/25 clutch with reduced inertia to a B-7 unit for a 10,000-mile Bentley test. | 1st Jun 1934 | Box 85 \ 2 scan0088 | |
| New clutch for a 10,000-mile Bentley test vehicle. | 4th Jun 1934 | Box 85 \ 2 scan0089 | |
| Visits to Morris and Rover to investigate the use of cork clutch linings and flexible engine mountings. | 14th Jun 1934 | Box 85 \ 2 scan0090 | |
| Experimental Rover cars, discussing their dashboard, Spontan gear, Hayes transmission, and coachwork, with a diagram of the clutch operation. | 14th Jun 1934 | Box 85 \ 2 scan0091 | |
| List of particulars for a Morris cork clutch. | 14th Jun 1934 | Box 85 \ 2 scan0092 | |
| Instruction for detailing the new 20/25 clutch (N.Sch.3948) for the Bentley chassis. | 20th Jun 1934 | Box 85 \ 2 scan0093 | |
| Requested modifications for a clutch assembly undergoing a 10,000-mile test. | 27th Jun 1934 | Box 85 \ 2 scan0094 | |
| Fitting of a Borg & Beck type clutch centre to a B-10 Unit. | 2nd Jul 1934 | Box 85 \ 2 scan0095 | |
| Outlining the requirements for fitting a Terraplane clutch to a Bentley B-1 unit. | 2nd Jul 1934 | Box 85 \ 2 scan0096 | |
| Blueprint of a Terraplane 6 Cork Clutch for a Bentley. | 2nd Jul 1934 | Box 85 \ 2 scan0097 | |
| Five different clutch experiments. | 2nd Jul 1934 | Box 85 \ 2 scan0098 | |
| Modifying the external clutch adjustment scheme for a Bentley. | 17th Jul 1934 | Box 85 \ 2 scan0099 | |
| Requesting a direct comparison of clutch life for a Bentley model. | 17th Jul 1934 | Box 85 \ 2 scan0100 | |
| Modification to the Bentley Clutch flywheel cover to facilitate truing the withdrawal sleeve. | 31th Jul 1934 | Box 85 \ 2 scan0101 | |
| Complaints of rattling Bentley clutches, identifying the cause as synchro-mesh dogs, and proposing modifications. | 9th Aug 1934 | Box 85 \ 2 scan0102 | |
| Complaints on Bentley clutches and questioning if improvements can be applied retrospectively to existing cars. | 13th Aug 1934 | Box 85 \ 2 scan0103 | |
| Complaints about Bentley clutches and a proposed modification to fix rattling gearbox parts. | 27th Aug 1934 | Box 85 \ 2 scan0104 | |
| Standardisation of parts document concerning the bifurcated rivetting of clutch linings. | 11th Jul 1934 | Box 85 \ 2 scan0105 | |
| Report discussing the cost implications of a parts standardization initiative. | 28th Aug 1934 | Box 85 \ 2 scan0106 | |
| Clutch rusting problem on 20/25 & Bentley models and the proposed solution of using a gun metal bush. | 28th Aug 1934 | Box 85 \ 2 scan0107 | |
| Complaints on Bentley clutches and a request for modification costs. | 31th Aug 1934 | Box 85 \ 2 scan0108 | |
| Inquiry into the cost of retrospectively fitting scheme N.Sch.4095 to resolve customer complaints. | 3rd Sep 1934 | Box 85 \ 2 scan0109 | |
| Response concerning a cost estimate for a changeover related to complaints about Bentley clutches. | 4th Sep 1934 | Box 85 \ 2 scan0110 | |
| Cost estimate for fitting locating plungers to prevent rattles in Synchro Mesh on 20/25 HP and Bentley Chassis under Scheme 4095. | 10th Sep 1934 | Box 85 \ 2 scan0111 | |
| Different clutch experiments and configurations. | 10th Sep 1934 | Box 85 \ 2 scan0112 | |
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