| Description | Date | Identifier | |
| Request to recondition a damaged Bentley Bump Chassis for endurance testing following an experiment. | 19th Dec 1934 | Box 82 \ 4 scan0064 | |
| Modification of a servo braking system for chassis 5-B-IV before a 10,000-mile test. | 21th Dec 1934 | Box 82 \ 4 scan0065 | |
| Performance graph comparing Mean Effective Pressure (MEP) against RPM for different Bentley engine timing and valve configurations. | 31th Dec 1934 | Box 82 \ 4 scan0066 | |
| List identifying the worst features of Bentley cars, with personnel assigned to testing. | 31th Dec 1934 | Box 82 \ 4 scan0067 | |
| Experimental sketches and endurance testing for a lightened cross member between headlamps. | 31th Dec 1934 | Box 82 \ 4 scan0068 | |
| Blueprint for the modification of an End Socket for lightness. | 2nd Jan 1935 | Box 82 \ 4 scan0069 | |
| Blueprint of a headlamp cross-member, its mounting, and associated frame components. | 2nd Jan 1935 | Box 82 \ 4 scan0070 | |
| List of modifications and tasks for specific cars sent to the shop and for the test department. | 1st Jan 1935 | Box 82 \ 4 scan0071 | |
| Modifications to the Bentley front apron and lamp bracket crossmember to correct an appearance issue. | 4th Jan 1935 | Box 82 \ 4 scan0072 | |
| Parts for the Flywheel, Clutch, and Pedals for a 3 1/2 Litre Bentley. | 7th Jan 1935 | Box 82 \ 4 scan0073 | |
| List of part number replacements and additions for sections 6000 and 7100. | 7th Jan 1935 | Box 82 \ 4 scan0074 | |
| Investigation into engine noise due to excessive clearance in cylinder No. 2. | 8th Jan 1935 | Box 82 \ 4 scan0075 | |
| Instruction to refit front shock absorbers and change the rear axle bevel pinion ball race. | 9th Jan 1935 | Box 82 \ 4 scan0076 | |
| Instruction memo detailing new features for the production of the Bentley 'E' series chassis. | 15th Jan 1935 | Box 82 \ 4 scan0077 | |
| Instruction to make and fit a lead rocker cover for Chassis No. 1-B-IV. | 17th Jan 1935 | Box 82 \ 4 scan0078 | |
| Modifications to Bentley front aprons and mudguards. | 18th Jan 1935 | Box 82 \ 4 scan0079 | |
| Scheme to prevent mud from damaging wiring in the front mudwings of Bentley and Phantom chassis. | 19th Jan 1935 | Box 82 \ 4 scan0080 | |
| Part standardisation and production for the Bentley Chassis 'E' Series. | 21th Jan 1935 | Box 82 \ 4 scan0081 | |
| Crankshafts for 6-cylinder engines, specifically discussing the potential to supercharge the existing Bentley. | 21th Jan 1935 | Box 82 \ 4 scan0082 | |
| Test bed and torsion results for a four-bearing crankshaft for a Bentley engine, comparing it to a standard seven-bearing version. | 19th Jan 1935 | Box 82 \ 4 scan0083 | |
| Investigation into crankshaft stiffness, comparing 4-bearing and 7-bearing shaft designs and the effect of disc webs. | 19th Jan 1935 | Box 82 \ 4 scan0084 | |
| Summary of critical speeds for various crankshaft configurations on the Bentley Engine. | 19th Jan 1935 | Box 82 \ 4 scan0085 | |
| Modification of the Bentley front apron, dumb iron covers, and mudguards. | 22th Jan 1935 | Box 82 \ 4 scan0086 | |
| Modifications and production strategy for the Bentley front apron and dumb iron covers. | 23th Jan 1935 | Box 82 \ 4 scan0087 | |
| The requirements for fitting the Bentley Front Apron and Dumb Iron Covers. | 25th Jan 1935 | Box 82 \ 4 scan0088 | |
| Listing parts of interest for development on the Spectre, 20/25, and other chassis. | 29th Jan 1935 | Box 82 \ 4 scan0089 | |
| Continuation list of modifications and parts for 20/25 and Bentley models. | 29th Jan 1935 | Box 82 \ 4 scan0090 | |
| Instructing the fitting shop to add several updated parts to a car currently being worked on. | 30th Jan 1935 | Box 82 \ 4 scan0091 | |
| Request to fit a propellor shaft damper to a car with specific settings. | 11th Feb 1935 | Box 82 \ 4 scan0092 | |
| Message confirming travel arrangements to collect a car in Derby. | 18th Feb 1935 | Box 82 \ 4 scan0093 | |
| Floorboard and dashboard insulation experiments to reduce engine and road noise in a Bentley. | 21th Feb 1935 | Box 82 \ 4 scan0094 | |
| The analysis of floorboard and dashboard insulation modifications on a Bentley I. | 23th Feb 1935 | Box 82 \ 4 scan0095 | |
| Floorboard and dashboard insulation tests for an experimental car. | 27th Feb 1935 | Box 82 \ 4 scan0096 | |
| Query regarding the standardisation of an extra crossbar and front stabiliser on the Bentley chassis. | 28th Feb 1935 | Box 82 \ 4 scan0097 | |
| Work order to fit an inertia ring to a flywheel, decarbonise the cylinder head, and grind the valves. | 1st Mar 1935 | Box 82 \ 4 scan0098 | |
| Effectiveness and standardisation of the Bentley cross member fitted between the headlamps. | 5th Mar 1935 | Box 82 \ 4 scan0099 | |
| Comparison of standard and larger induction systems, detailing differences in power output and performance. | 8th Mar 1935 | Box 82 \ 4 scan0100 | |
| Performance graph comparing three different engine induction system configurations. | 30th Jan 1935 | Box 82 \ 4 scan0101 | |
| Graphical comparison of three induction system configurations, plotting induction pipe depression against engine RPM. | 30th Jan 1935 | Box 82 \ 4 scan0102 | |
| Query regarding the correct procedure for running engines after start-up. | 13th Mar 1935 | Box 82 \ 4 scan0103 | |
| Procedure for running engines, specifically idling speeds and cylinder wear. | 14th Mar 1935 | Box 82 \ 4 scan0104 | |
| The standardization of the Bentley cross member, considering extra weight and cost. | 15th Mar 1935 | Box 82 \ 4 scan0105 | |
| Noise insulation work on experimental and customer cars. | 16th Mar 1935 | Box 82 \ 4 scan0106 | |
| Experiments for noise insulation in Bentley cars using felt. | 14th Mar 1935 | Box 82 \ 4 scan0107 | |
| List of interior fitting instructions for soundproofing and component routing. | 14th Mar 1935 | Box 82 \ 4 scan0108 | |
| Works instruction sheet for Chassis 3-B-IV, B-9 Unit. | 18th Mar 1935 | Box 82 \ 4 scan0109 | |
| Brief specification for building a 3 1/4' Bore Engine Unit. | 30th Mar 1935 | Box 82 \ 4 scan0110 | |
| Alterations to an engine head and the risk of a necessary redesign. | 30th Mar 1935 | Box 82 \ 4 scan0111 | |
| New engine tie design for a Bentley with a centrally mounted radiator. | 8th Apr 1935 | Box 82 \ 4 scan0112 | |
| Providing updates on Spectre, Phantom, and Bentley models, covering noise insulation, fan failures, and supercharger tests. | 11th Apr 1935 | Box 82 \ 4 scan0113 | |
| The status of tests for axle control, water excluders, brake fading, speed levers, and Girling brakes. | 11th Apr 1935 | Box 82 \ 4 scan0114 | |
| Performance issues and engineering updates for various car models. | 11th Apr 1935 | Box 82 \ 4 scan0115 | |
| New induced flow engine breathers for the 20/25 and Bentley chassis, and the need for further testing. | 12th Apr 1935 | Box 82 \ 4 scan0116 | |
| Advance print for a Bentley's revised bonnet, dumb iron covers, and front apron. | 15th Apr 1935 | Box 82 \ 4 scan0117 | |
| Instruction to make and despatch parts for a Bentley's centrally mounted radiator and wings to France. | 16th Apr 1935 | Box 82 \ 4 scan0118 | |
| Design flaws and potential modifications for a headlight changeover switch. | 17th Apr 1935 | Box 82 \ 4 scan0119 | |
| Request for blueprints of drawings for boring out a Bentley engine to assist in an investigation. | 17th Apr 1935 | Box 82 \ 4 scan0120 | |
| Comparison of Autocar acceleration figures for Bentley and Hotchkiss vehicles. | 24th Apr 1935 | Box 82 \ 4 scan0121 | |
| Drawings for a bigger bore Bentley engine. | 25th Apr 1935 | Box 82 \ 4 scan0122 | |
| To R.H.C. detailing seven action points from a recent conversation. | 26th Apr 1935 | Box 82 \ 4 scan0123 | |
| Table detailing the particulars of various car engines. | 9th May 1935 | Box 82 \ 4 scan0124 | |
| Progress report on car experimental work, highlighting a shortage of available workshop pits and listing urgent jobs. | 11th May 1935 | Box 82 \ 4 scan0125 | |
| List of outstanding experimental jobs related to chassis and test bed development. | 11th May 1935 | Box 82 \ 4 scan0126 | |
| List of development points for Spectre, B-12, and Bentley components. | 11th May 1935 | Box 82 \ 4 scan0127 | |
| Competitor car performance claims and the strategy for responding with Bentley tests. | 20th May 1935 | Box 82 \ 4 scan0128 | |
| List outlining general car road work tests for various components and systems. | 1st Jun 1936 | Box 82 \ 4 scan0129 | |
| List of action items and tests for various vehicle projects and components. | 19th Jun 1935 | Box 82 \ 4 scan0130 | |
| List of jobs and promised completion dates for the Spectre project. | 19th Jun 1935 | Box 82 \ 4 scan0131 | |
| Job status report listing parts such as Spectre relief valves, Bentley components, and B-Units with their progress. | 19th Jun 1935 | Box 82 \ 4 scan0132 | |
| Progress report memo listing various jobs, their statuses, and completion dates. | 19th Jun 1935 | Box 82 \ 4 scan0133 | |
| Progress report or job list detailing various engineering tasks, parts, and tests. | 19th Jun 1935 | Box 82 \ 4 scan0134 | |
| Requesting information on the results of experimental Bentley work, noting the costs incurred. | 17th Jun 1935 | Box 82 \ 4 scan0135 | |
| Analysis of Bentley expenses for 1935, categorized by month. | 17th Jun 1935 | Box 82 \ 4 scan0136 | |
| Summary of total and average monthly expenses from 1932 to 1935. | 17th Jun 1935 | Box 82 \ 4 scan0137 | |
| List of modifications and tests for various vehicle chassis or models. | 17th Jun 1935 | Box 82 \ 4 scan0138 | |
| List of modifications and tests for different vehicle chassis and engine unit configurations. | 21th Jun 1935 | Box 82 \ 4 scan0139 | |
| Request for a standardisation sheet for a geared starter motor on a Bentley chassis following successful trials. | 21th Jun 1935 | Box 82 \ 4 scan0140 | |
| Requesting updates on bench test results for the Large Bore Bentley Engine and urging the dispatch of car VI-B-IV to France. | 15th Jul 1935 | Box 82 \ 4 scan0141 | |
| Comparison document detailing the specifications and weights of Aluminium versus Cast Iron (C.I.) engines. | 17th Jul 1935 | Box 82 \ 4 scan0142 | |
| Arranging a meeting to test chassis B-2-CW at the Sand Pits. | 19th Jul 1935 | Box 82 \ 4 scan0143 | |
| Programme of work agreed with 'Rm' for the completion of various larger bore engine components. | 19th Jul 1935 | Box 82 \ 4 scan0144 | |
| List of important designs with their corresponding reference numbers. | 22th Jul 1935 | Box 82 \ 4 scan0145 | |
| Comparison of horsepower between a standard 3.25 and a proposed 3.5 Bore Bentley at various road speeds. | 22th Jul 1935 | Box 82 \ 4 scan0146 | |
| Proposal to alter the starter gear ratio on the Large Bore 20/25 and Bentley engines to address a whistling noise. | 9th Sep 1935 | Box 82 \ 4 scan0147 | |
| Drawing LeC.4697 showing a common crankcase for 25-29 and Large Bore Bentley engines. | 9th Sep 1935 | Box 82 \ 4 scan0148 | |
| Turbulent cylinder head for a 25-29 HP engine and a recommendation for the Bentley large bore head. | 9th Sep 1935 | Box 82 \ 4 scan0149 | |
| Modifications to the flywheel and damper for the Large Bore Bentley and 25-29 HP models. | 9th Sep 1935 | Box 82 \ 4 scan0150 | |
| The alteration needed for the rev counter drive on the Big Bore Bentley due to a newly fitted dynamo. | 12th Sep 1935 | Box 82 \ 4 scan0151 | |
| Note regarding a revolution counter drive design for the Big Bore Bentley. | 12th Sep 1935 | Box 82 \ 4 scan0152 | |
| Outlining the agreed procedure for developing an alternative head for a Bentley single-cylinder unit. | 16th Sep 1935 | Box 82 \ 4 scan0153 | |
| Design investigation and testing plan for four-valve camshaft heads and Pent-House aero engine heads. | 16th Sep 1935 | Box 82 \ 4 scan0154 | |
| On two design considerations for Bentley engine development, focusing on engine height and exhaust valve noise. | 17th Sep 1935 | Box 82 \ 4 scan0155 | |
| Confirming an instruction to test a Bentley chassis on a vibrator unit with a modified front axle position. | 17th Sep 1935 | Box 82 \ 4 scan0156 | |
| List of action points confirming a conversation about modifications to various car models and components. | 18th Sep 1935 | Box 82 \ 4 scan0157 | |
| Alternative dynamo drive for the 25-29 HP and Large Bore Bentley models. | 18th Sep 1935 | Box 82 \ 4 scan0158 | |
| The endurance testing and performance comparison of Hall's Metal Bearings against lead bronze and white metal. | 21th Sep 1935 | Box 82 \ 4 scan0159 | |
| Photographs of B-16 Unit big end and main bearings after endurance testing. | 21th Sep 1935 | Box 82 \ 4 scan0160 | |
| Photograph of B-16 unit Hall's metal big end bearings after a 42-hour endurance test. | 21th Sep 1935 | Box 82 \ 4 scan0161 | |
| Photograph of Hall's metal main bearings from a B-16 unit after an endurance test. | 21th Sep 1935 | Box 82 \ 4 scan0162 | |
| Photographic record of B-15 unit big end and main bearings after endurance testing. | 21th Sep 1935 | Box 82 \ 4 scan0163 | |
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