| Description | Date | Identifier | |
| Drawing (PD.355) showing the front wheel movements for models B.5 and B.38 at maximum bump and full lock. | 23th Jan 1939 | Box 100 \ 2 scan0154 | |
| Standard wheel specifications for 'B.V.' model cars, regarding wire wheels versus optional discs. | 24th May 1939 | Box 100 \ 2 scan0155 | |
| Effects of fitting larger tyres on Bentley chassis prior to the 'M' series. | 1st Jun 1939 | Box 100 \ 2 scan0156 | |
| Request for a sample wheel and tyre for the Bentley V in order to arrange production of covers. | 23th Jun 1939 | Box 100 \ 2 scan0157 | |
| Arranging to send a wheel complete with tyre and a spare wheel cover for inspection. | 26th Jun 1939 | Box 100 \ 2 scan0158 | |
| Requesting the modification of Bentley wheels and the creation of a special wheel spanner. | 23th Jan 1940 | Box 100 \ 2 scan0159 | |
| Investigation into clearance issues between the tyre, rim, and steering ball joint for the Bentley V model. | 31th Jul 1941 | Box 100 \ 2 scan0160 | |
| Exhaust valve sinkage on the 25/30 HP engine, proposing a modification to the cylinder head cooling path. | 6th Apr 1939 | Box 100 \ 2 scan0161 | |
| Potential reclamation of a cylinder head for a 25/30 HP transport car. | 6th Apr 1939 | Box 100 \ 2 scan0162 | |
| Modifications and replacements for silencer suspension and exhaust fittings on the 25/30-HP Chassis. | 7th Feb 1939 | Box 100 \ 2 scan0163 | |
| Continuation of a modification instruction to address noise in the silencer suspension, listing required parts. | 7th Feb 1939 | Box 100 \ 2 scan0164 | |
| Rescinding previous instructions regarding piston seizures during the decarbonising of a 25/30 HP engine. | 1st Nov 1938 | Box 100 \ 2 scan0165 | |
| 25/30 HP engine piston seizure and issues with sticking ball drain valves due to carbon build-up. | 11th Jul 1938 | Box 100 \ 2 scan0166 | |
| Typed memo concerning 25/30 HP Piston Seizures and a requested chamfer angle. | 7th Jul 1938 | Box 100 \ 2 scan0167 | |
| Investigation into engine piston seizures on the 25/30 HP model. | 5th Jul 1938 | Box 100 \ 2 scan0168 | |
| Providing instructions for the running-in of pistons using Castor Oil. | 4th Jul 1938 | Box 100 \ 2 scan0169 | |
| Proposing a stamped letter on the cylinder block to indicate that the pistons have been chamfered. | 4th Jul 1938 | Box 100 \ 2 scan0170 | |
| Procedure for decarboning the 25/30 HP engine to prevent piston seizure, following issues on three specific chassis. | 29th Jun 1938 | Box 100 \ 2 scan0171 | |
| The service history and subsequent piston seizures on three 25/30 HP chassis vehicles. | 17th Jun 1938 | Box 100 \ 2 scan0172 | |
| The calculation and experimental production of valve springs for the Bentley 111 engine. | 22th Nov 1937 | Box 100 \ 3 scan0001 | |
| Modification to the drawing for Wraith and Bentley III bottom tappets to prevent push rod jamming. | 7th Feb 1938 | Box 100 \ 3 scan0002 | |
| Recommendation to simplify valve timing markings on the B.III flywheel to avoid confusion. | 19th Mar 1938 | Box 100 \ 3 scan0003 | |
| Outlining the specifications for modified and alternative camshaft forms for the Bentley 111 engine. | 24th May 1938 | Box 100 \ 3 scan0004 | |
| Issues with push rods and tappets, proposing design changes for Wraith III & Bentley III engines. | 13th Jul 1938 | Box 100 \ 3 scan0005 | |
| Proposed alterations to engine components and considering manufacturing costs. | 13th Jul 1938 | Box 100 \ 3 scan0006 | |
| Note regarding tappets and push rods for the Wraith III and Bentley III models. | 13th Jul 1938 | Box 100 \ 3 scan0007 | |
| Note regarding barrel-type tappets for the B.III and Phantom III models. | 9th Aug 1938 | Box 100 \ 3 scan0008 | |
| Issuance of new drawings for Bentley III Chassis valves and fittings. | 15th Oct 1938 | Box 100 \ 3 scan0009 | |
| Proposals for an oil seal on the valve spring top washer for the Wraith III and Bentley 111 models. | 10th Nov 1938 | Box 100 \ 3 scan0010 | |
| Modification to the oil seal for the valve spring top washer on the Wraith III model. | 10th Nov 1938 | Box 100 \ 3 scan0011 | |
| Cracked No.2 exhaust valve on a Bentley III No.1 unit and the replacement of other cracked valves. | 11th Oct 1938 | Box 100 \ 3 scan0012 | |
| Photograph of a Bentley III No.1 Unit exhaust valve after a test run. | 13th Dec 1938 | Box 100 \ 3 scan0013 | |
| Modified push rod with a deeper top cup for the Bentley 111 and Wraith III. | 13th Dec 1938 | Box 100 \ 3 scan0014 | |
| Requesting a report on three broken valve springs that failed a 15,000-mile test. | 2nd Jan 1939 | Box 100 \ 3 scan0015 | |
| Instructions concerning a modified Push Rod and Adjusting Screw for the Bentley V and Wraith III chassis. | 2nd Jan 1939 | Box 100 \ 3 scan0016 | |
| Standardization and manufacturing specifications for push rods for the Wraith III & Bentley V models. | 12th Jan 1939 | Box 100 \ 3 scan0017 | |
| Internal request to scheme some sodium-filled exhaust valves for trial on the Bentley V or Wraith. | 16th Jan 1939 | Box 100 \ 3 scan0018 | |
| Issuance of new drawings for valves and fittings for the Bentley V Chassis. | 1st Feb 1939 | Box 100 \ 3 scan0019 | |
| List of outstanding jobs in order of urgency. | 27th Mar 1939 | Box 100 \ 3 scan0020 | |
| Modified exhaust valve to address breakage issues on the Bentley V and Wraith models. | 17th Apr 1939 | Box 100 \ 3 scan0021 | |
| New drawing for a modified exhaust valve for the Bentley V. Chassis. | 20th Apr 1939 | Box 100 \ 3 scan0022 | |
| Tests carried out on valve sealing washers for B.V. & Wraith III models. | 13th May 1939 | Box 100 \ 3 scan0023 | |
| Requesting four sets of aluminium valve sealing washers, replacing a previous Neuprene design. | 31th May 1939 | Box 100 \ 3 scan0024 | |
| And fitting of valve sealing washers. | 6th Jun 1939 | Box 100 \ 3 scan0025 | |
| The bore size of Bush-Rockers for the Bentley S. 'A' Series, requesting a drawing alteration. | 18th Jul 1939 | Box 100 \ 3 scan0026 | |
| Blueprint detailing a modified inlet cam-form for a Bentley III engine, with lift measurement tables. | 24th May 1938 | Box 100 \ 3 scan0027 | |
| Blueprint of a modified exhaust cam-form for the Bentley III, with lift data tables. | 24th May 1938 | Box 100 \ 3 scan0028 | |
| Weight comparison estimate between the Bentley III and the K Series Bentley, detailing heavier, lighter, and unaltered components. | 24th Aug 1937 | Box 100 \ 3 scan0029 | |
| Estimate of weight differences between the Bentley III and the present K Series Bentley. | 24th Aug 1937 | Box 100 \ 3 scan0030 | |
| On the weight of Messrs. Park Ward's coachwork for the first Bentley lll body. | 28th Jan 1938 | Box 100 \ 3 scan0031 | |
| Weight report for Chassis No. 1.B.5, calculating the nett weight of the body and wings. | 27th Jan 1938 | Box 100 \ 3 scan0032 | |
| Breakdown of the coachwork weights for a vehicle, including individual parts and totals. | 1st Feb 1938 | Box 100 \ 3 scan0033 | |
| Complete weight analysis of car model 7.B.5, including component breakdowns and totals. | 3rd Mar 1938 | Box 100 \ 3 scan0034 | |
| Preliminary weight analysis showing a 50 lbs saving on the front suspension of the B.III model compared to the Wraith. | 9th Mar 1938 | Box 100 \ 3 scan0035 | |
| Weight comparison of front end suspension components for the Bentley III and Wraith models. | 17th Mar 1938 | Box 100 \ 3 scan0036 | |
| Comparing seating dimensions and weight of a Bentley III body with a 3 1/2 Jaguar. | 17th Mar 1938 | Box 100 \ 3 scan0037 | |
| Weight analysis and comparison of the B.III car against competitors and other models. | 19th Mar 1938 | Box 100 \ 3 scan0038 | |
| Balance between cost, weight saving, and market profitability for Bentley chassis features. | 19th Mar 1938 | Box 100 \ 3 scan0039 | |
| Complete weight analysis of model 7.B.5, including a breakdown of component weights and a noted discrepancy. | 3rd Mar 1938 | Box 100 \ 3 scan0040 | |
| Dimensional comparison drawing between a Lincoln Zephyr (black) and a Bentley III (red). | 8th Feb 1938 | Box 100 \ 3 scan0041 | |
| Dimensional schematic of a Morris Twenty Five Series III with handwritten comparative notes for a Bentley III. | 22th Feb 1938 | Box 100 \ 3 scan0042 | |
| Short memo confirming an investigation into quoted bodywork weights. | 2nd Jun 1938 | Box 100 \ 3 scan0043 | |
| Letter from coachbuilder Park Ward & Co. Ltd regarding the weight of a body for Chassis No.2.B.5. | 27th Jun 1938 | Box 100 \ 3 scan0044 | |
| Weight breakdown list of various car body components in imperial units. | 27th Jun 1938 | Box 100 \ 3 scan0045 | |
| List of weights for vehicle trimming components in imperial units. | 27th Jun 1938 | Box 100 \ 3 scan0046 | |
| Weight summary for various car body components using imperial units. | 1st Jul 1938 | Box 100 \ 3 scan0047 | |
| Letter to Park Ward & Co., Ltd. regarding a weight analysis discrepancy for a 2.B.5 body. | 1st Jul 1938 | Box 100 \ 3 scan0048 | |
| Weight analysis of a 2-B-5 body-saloon, number B.283. | 29th Jun 1938 | Box 100 \ 3 scan0049 | |
| Noting a 54 lbs weight discrepancy for the B.III body compared to Park Ward's estimate. | 2nd Jul 1938 | Box 100 \ 3 scan0050 | |
| Letter from coachbuilder Park Ward regarding the weight analysis of the coachwork for chassis 2.B.5. | 4th Jul 1938 | Box 100 \ 3 scan0051 | |
| List of weights for different chassis, body, and optional extra configurations. | 26th Jul 1938 | Box 100 \ 3 scan0052 | |
| Request for a weight analysis for the B.III model, and for figures for the B.50 and Silver Wraith frames. | 29th Aug 1938 | Box 100 \ 3 scan0053 | |
| Summary of coachwork weights for all-steel cars, discussing weight savings from material choice and component elimination. | 30th Aug 1938 | Box 100 \ 3 scan0054 | |
| Complete weight analysis of vehicle S.B.5. | 30th Aug 1938 | Box 100 \ 3 scan0055 | |
| Weight comparison analysis for the Bentley III, detailing the weight differences between models 7.B.5 and 8.B.5. | 30th Aug 1938 | Box 100 \ 3 scan0056 | |
| Weight comparison table for various car bodies and their components. | 30th Aug 1938 | Box 100 \ 3 scan0057 | |
| Perturbation over the increased weight of a car body. | 5th Sep 1938 | Box 100 \ 3 scan0058 | |
| Weight increase of body 8-B.V compared to 7-B.V, with a breakdown from coachbuilder Park Ward. | 26th Sep 1938 | Box 100 \ 3 scan0059 | |
| Letter excerpt regarding the procedure for weighing car bodies supplied by Park Ward. | 28th Sep 1938 | Box 100 \ 3 scan0060 | |
| Comparing the body weight of a new Vauxhall 12 HP with a Bentley. | 28th Sep 1938 | Box 100 \ 3 scan0061 | |
| Steady increase in Bentley body weights from 1935 to 1938. | 28th Sep 1938 | Box 100 \ 3 scan0062 | |
| Graph showing production Bentley car weights from 1934 to 1938. | 22th Sep 1938 | Box 100 \ 3 scan0063 | |
| Comparison of Phantom III and Bentley III engine component weights for marine applications. | 18th Oct 1938 | Box 100 \ 3 scan0064 | |
| Weight specification for a complete Bentley III power plant. | 28th Oct 1938 | Box 100 \ 3 scan0065 | |
| Comparing the car body shell weights of S.S., Park Ward, and Jaguar models. | 28th Oct 1938 | Box 100 \ 3 scan0066 | |
| Weight analysis of the B.V. prototype, comparing it to the 'M' series Bentley. | 14th Nov 1938 | Box 100 \ 3 scan0067 | |
| Lightening the chassis of a Continental Bentley and comparing its weight to the original 3 1/2-litre model. | 14th Nov 1938 | Box 100 \ 3 scan0068 | |
| Comparison of the weights between the B.V. chassis and the 'H' series Bentley chassis. | 14th Nov 1938 | Box 100 \ 3 scan0069 | |
| Weight comparison sheet detailing increases and excesses for various chassis components. | 14th Nov 1938 | Box 100 \ 3 scan0070 | |
| Comparison of chassis weights for the 25/30 and Wraith models, noting the weight of the standard front bumper. | 14th Nov 1938 | Box 100 \ 3 scan0071 | |
| Weight analysis memorandum comparing Standard, Continental, and Experimental Bentley V front shock dampers. | 14th Jun 1939 | Box 100 \ 3 scan0072 | |
| Weight analysis of a 12.B.V. body and chassis. | 22th Jun 1939 | Box 100 \ 3 scan0073 | |
| Secret memo regarding the weight analysis of the 'Corniche' chassis and a change from aluminium to cast iron drums. | 30th Jun 1939 | Box 100 \ 3 scan0074 | |
| Comparison of component weights between the Standard B.V. and Continental car models. | 3rd Jul 1939 | Box 100 \ 3 scan0075 | |
| Weight analysis for the 12.B.V. Ripple model, breaking down the weight of the chassis, extras, and coachwork. | 3rd Jul 1939 | Box 100 \ 3 scan0076 | |
| Weight analysis of a Humber car, comparing it to their own vehicle with a view to reducing weight. | 1st Aug 1939 | Box 100 \ 3 scan0077 | |
| Typed memorandum discussing weight reduction for various components like steering, exhaust, and body, comparing them to competitors. | 1st Aug 1939 | Box 100 \ 3 scan0078 | |
| Weight analysis comparing groups of parts between the B-V model and a 1939 Humber Super Snipe Saloon. | 3rd Aug 1939 | Box 100 \ 3 scan0079 | |
| Weight comparison of various chassis components between a Humber and a 'B.V.' vehicle, continued on page 2. | 3rd Aug 1939 | Box 100 \ 3 scan0080 | |
| Page from a weight analysis report comparing various vehicle components. | 3rd Aug 1939 | Box 100 \ 3 scan0081 | |
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