| Description | Date | Identifier | |
| Comparison of driving performance before and after changing to lower-pressure Michelin 'Pilot' tyres, detailing significant improvements in handling and safety. | 25th Oct 1937 | Box 146 \ 1 scan0074 | |
| Translated article from 'L'AUTO' discussing the Michelin 'Pilot' tyre and its effect on roadability and safety. | 25th Oct 1937 | Box 146 \ 1 scan0075 | |
| Confidential letter proposing the permanent employment of Mr. Behnan at the Chateauroux office. | 4th Feb 1937 | Box 146 \ 1 scan0076 | |
| Investigation report into excessive slackness and jamming in a Phantom III steering column for chassis 3.BU.94. | 5th Nov 1937 | Box 146 \ 1 scan0077 | |
| The examination and replacement of steering columns for a Bentley and a new Zographos car (chassis 3.OP.II4). | 5th Nov 1937 | Box 146 \ 1 scan0078 | |
| Request for Michelin 'Pilot' tyres to test on Bentley and Phantom III models. | 5th Nov 1937 | Box 146 \ 1 scan0079 | |
| Translated press clipping from 'L'AUTO' reviewing the London Motor Exhibition, focusing on French manufacturers. | 23th Oct 1937 | Box 146 \ 1 scan0080 | |
| Commentary on vehicle manufacturing strategies, advocating for a single model policy with incremental improvements. | 23th Oct 1937 | Box 146 \ 1 scan0081 | |
| Summary of special technical points and automotive advancements from various manufacturers. | 23th Oct 1937 | Box 146 \ 1 scan0082 | |
| Commentary on various automotive manufacturers, their engines, and features like adjustable seats and steering wheels. | 22th Oct 1937 | Box 146 \ 1 scan0083 | |
| Translated article by Charles Faroux lamenting the absence of bare chassis at the London Motor Exhibition. | 22th Oct 1937 | Box 146 \ 1 scan0084 | |
| Manufacturers exhibiting cars without a chassis and a mention of two specific engines. | 22th Oct 1937 | Box 146 \ 1 scan0085 | |
| Coachwork exhibition at Earl's Court, comparing design philosophies and highlighting specific coachbuilders. | 22th Oct 1937 | Box 146 \ 1 scan0086 | |
| Typed document discussing and comparing British and American car body and bonnet designs. | 9th Feb 1937 | Box 146 \ 1 scan0087 | |
| Internal request for Phantom III chassis information, including engine power curves and gear ratios, for a customer. | 9th Feb 1937 | Box 146 \ 1 scan0088 | |
| Cover letter regarding the translation of two articles by Charles Faroux on the London Motor Exhibition. | 9th Feb 1937 | Box 146 \ 1 scan0089 | |
| Results of wind tunnel tests on a car model and next steps. | 9th Nov 1937 | Box 146 \ 1 scan0090 | |
| The supply of Thermoid faced clutch plates for chassis B.35.KU, the Paris Trials Car. | 9th Feb 1937 | Box 146 \ 1 scan0091 | |
| The fitting and performance of Graphite Bronze clutch faces on two 3½-litre Bentley vehicles. | 10th Nov 1937 | Box 146 \ 1 scan0092 | |
| Confidential internal memo discussing Mr. Behnan's employment and involvement in future vehicle testing in France. | 10th Nov 1937 | Box 146 \ 1 scan0093 | |
| Standardizing a Borg & Beck clutch plate with Thermoid facings for a Bentley trials car. | 11th Nov 1937 | Box 146 \ 1 scan0094 | |
| The despatch of a 10' Thermoid faced Borg & Beck plate to Paris. | 11th Nov 1937 | Box 146 \ 1 scan0095 | |
| To Bentley Motors regarding the unavailability of Michelin Pilot tyres for Bentley or Phantom III wheels. | 12th Nov 1937 | Box 146 \ 1 scan0096 | |
| Letter from Paris to Derby requesting a rapid decision on the body construction for a stream-lined car to avoid delays. | 12th Nov 1937 | Box 146 \ 1 scan0097 | |
| Phantom III chassis power curve, gear ratios, and clarification on superchargers. | 13th Nov 1937 | Box 146 \ 1 scan0098 | |
| Loss of oil pressure on a trials car due to issues with pre-loaded main bearings. | 15th Nov 1937 | Box 146 \ 1 scan0099 | |
| Requesting necessary details in order to issue an instruction sheet. | 21th Apr 1937 | Box 146 \ 1 scan0100 | |
| Low oil pressure and bearing issues on the B.35.KU Paris Trial Car. | 15th Feb 1937 | Box 146 \ 1 scan0101 | |
| Investigation into low oil pressure on Chassis B.25.KU, detailing issues with scored and 'closed in' centre and intermediate bearings. | 15th Feb 1937 | Box 146 \ 1 scan0102 | |
| The inspection of chassis B.35.KU, a Paris Trials Car, detailing crankshaft and bearing measurements. | 16th Nov 1937 | Box 146 \ 1 scan0103 | |
| Findings on oil pipe and bearing adjustments following component removal. | 16th Nov 1937 | Box 146 \ 1 scan0104 | |
| Correspondence regarding a defective o/s oil seal on the rear axle for chassis B.197.JY. | 17th Feb 1937 | Box 146 \ 1 scan0105 | |
| Customs clearance issues in France for a steering column on chassis 22-G-V. | 17th Nov 1937 | Box 146 \ 1 scan0106 | |
| Typed memo detailing an investigation into engine bearing and oil pressure issues on a demonstration car. | 17th Feb 1937 | Box 146 \ 1 scan0107 | |
| Letter discussing issues with AC.2 and AC.7 engine bearings and a request for servo lever parts. | 17th Nov 1937 | Box 146 \ 1 scan0108 | |
| Confidential letter proposing a permanent employment arrangement for an employee, Mr. Behnan, to facilitate his availability for tests at Chateauroux. | 18th Nov 1937 | Box 146 \ 1 scan0109 | |
| Owner's complaint about the engine oil level for chassis B.4I.GP. | 22th Feb 1937 | Box 146 \ 1 scan0110 | |
| Departure from France and customs for chassis 22.G.V. | 22th Nov 1937 | Box 146 \ 1 scan0111 | |
| Arrangements for Mr. Behnan's services and upcoming car tests in Chateauroux. | 22th Nov 1937 | Box 146 \ 1 scan0112 | |
| Letter regarding the fitting of Phantom III connecting rods and a query about the risk of using A.C.6 alloy compared to A.C.2 alloy. | 30th Nov 1937 | Box 146 \ 1 scan0113 | |
| Confirming customer Mr. Benhaim's satisfaction with the steering on chassis 3.AZ.I40. | 28th Feb 1937 | Box 146 \ 1 scan0114 | |
| Engine dismantling and bearing sinkage measurements for chassis B. 10 GA. | 30th Nov 1937 | Box 146 \ 1 scan0115 | |
| Letter detailing a discussion with Messrs Aubert & Duval regarding the suboptimal steel composition used for crankshafts. | 2nd Dec 1937 | Box 146 \ 1 scan0116 | |
| Crankshaft steel compositions (LK.3 and GK.5) and the importance of post-nitriding polishing processes. | 2nd Dec 1937 | Box 146 \ 1 scan0117 | |
| Provisional Air Ministry General Specification for steel suitable for nitrogen hardening. | 1st Mar 1930 | Box 146 \ 1 scan0118 | |
| Specification for mechanical properties, heat treatment, and nitrogen hardening of parts. | 1st Mar 1930 | Box 146 \ 1 scan0119 | |
| Specifying the requirements for mechanical testing of parts, including heat treatment and hardness checks. | 17th Jul 1937 | Box 146 \ 1 scan0120 | |
| Air Ministry specification for 60-70 ton Chromium-Molybdenum Steel suitable for nitrogen hardening. | 17th Jul 1937 | Box 146 \ 1 scan0121 | |
| The history of Nitrogen Hardening and a new Hykro steel specification. | 6th Dec 1937 | Box 146 \ 1 scan0122 | |
| Specification document for Hykro Steel, detailing its chemical composition and mechanical properties. | 6th Dec 1937 | Box 146 \ 1 scan0123 | |
| Adopting hykro steel for crankshafts and its suitability for Nitrogen Hardening. | 6th Dec 1937 | Box 146 \ 1 scan0124 | |
| Typed memo about sending a 'Palmarès des Sports' magazine regarding land speed records, with a handwritten note. | 6th Dec 1937 | Box 146 \ 1 scan0125 | |
| Letter comparing the performance of Borg & Beck clutches with Long type clutches, detailing issues with jaggering and vibration. | 8th Dec 1937 | Box 146 \ 1 scan0126 | |
| Phantom III connecting rods, specifically AC.6 alloy bushes, clearances, and a Paris trials car. | 8th Dec 1938 | Box 146 \ 1 scan0127 | |
| Letter discussing the performance and selection of nitriding steels for crankshafts. | 8th Dec 1937 | Box 146 \ 1 scan0128 | |
| Comparison of different steel types (V.C.M., Hykro, Nitralloy) and the effects of aluminium in the nitriding process for aero engines and chassis. | 8th Dec 1937 | Box 146 \ 1 scan0129 | |
| Follow-up request for a reply concerning Phantom III connecting rods and Hall's Metal bearings. | 9th Dec 1937 | Box 146 \ 1 scan0130 | |
| Trouble with Borg & Beck clutches fitted with Thermoid material and plans for further experimental work. | 10th Dec 1937 | Box 146 \ 1 scan0131 | |
| The supply of road wheels with normalised rims for the Paris Depot. | 11th Dec 1937 | Box 146 \ 1 scan0132 | |
| The performance of 'Perfect oil seals' fitted to Bentley rear axles on various chassis. | 13th Dec 1937 | Box 146 \ 1 scan0133 | |
| Fitting of a 25/30 type electric pump and its effects on the carburettor. | 16th Dec 1937 | Box 146 \ 1 scan0134 | |
| Supply and treatment of road wheels and rims from French suppliers. | 16th Dec 1937 | Box 146 \ 1 scan0135 | |
| Nitriding steels, the cleaning of crankshafts, and steel compositions. | 16th Dec 1937 | Box 146 \ 1 scan0136 | |
| Letter discussing engine oscillations and clutch jaggers caused by incorrectly fitted engine suspension casings, including a diagram of the parts. | 16th Dec 1937 | Box 146 \ 1 scan0137 | |
| Letter to W.A. Robotham regarding sending a Hykro steel mixture to Messrs. Aubert & Duval for their opinion on its nitriding capacity for crankshafts. | 16th Dec 1937 | Box 146 \ 1 scan0138 | |
| Requesting an opinion on Hykro steel for use in crankshafts. | 20th Dec 1937 | Box 146 \ 1 scan0139 | |
| Comparing Borg & Beck clutches to Long clutch plates, particularly in relation to clutch jagger on Bentley cars. | 20th Dec 1937 | Box 146 \ 1 scan0140 | |
| Telegram regarding the despatch of a long type clutch plate for chassis BENTKU thirty five. | 20th Dec 1937 | Box 146 \ 1 scan0141 | |
| Telegram confirming a long type clutch plate for chassis GBT35 has been dispatched to Francobrit. | 20th Dec 1937 | Box 146 \ 1 scan0142 | |
| Water ingress in shock dampers and their removal procedure for Chassis 3.AZ.140. | 20th Dec 1937 | Box 146 \ 1 scan0143 | |
| Standardising Thermoid on Borg & Beck clutch plates and refusing to fit a Long plate to a Trials' car. | 21th Dec 1937 | Box 146 \ 1 scan0144 | |
| Engine unit for the Paris Depot, including shipping arrangements and a query about charges. | 22th Dec 1937 | Box 146 \ 1 scan0145 | |
| Correspondence regarding the shipment of a 4 1/4 Litre Bentley engine unit and its parts to avoid higher tariffs. | 20th Dec 1937 | Box 146 \ 1 scan0146 | |
| Clarifying the charging for a non-standard spare engine unit and associated transport costs. | 23th Dec 1937 | Box 146 \ 1 scan0147 | |
| Short memo confirming the submission of a matter concerning nitriding steels to Mr. Billaudet. | 23th Dec 1937 | Box 146 \ 1 scan0148 | |
| Query regarding the completion of a Bentley with 'Marles' steering and larger road wheels. | 24th Dec 1937 | Box 146 \ 1 scan0149 | |
| Service procedure for Bentley engine bearings during decarbonization. | 24th Dec 1937 | Box 146 \ 1 scan0150 | |
| Bearing issues and decarbonizing procedures for a 4 1/4 litre Bentley. | 24th Dec 1937 | Box 146 \ 1 scan0151 | |
| Confirming the test schedule for a Bentley with Marles Steering and larger wheels. | 29th Dec 1937 | Box 146 \ 1 scan0152 | |
| Requesting standard parts to assemble a dummy tower for flushing oil from a cooling system. | 30th Dec 1937 | Box 146 \ 1 scan0153 | |
| Covering note attaching a memo from Swindall in response to a query from Sleator regarding Bentley bearings. | 3rd Jan 1938 | Box 146 \ 1 scan0154 | |
| Procedures for servicing Bentley main bearings. | 31th Dec 1937 | Box 146 \ 1 scan0155 | |
| Fitting new Whitemetal rear bearings, detailing production tolerances and service adjustments. | 31th Dec 1937 | Box 146 \ 1 scan0156 | |
| Investigations into main bearing issues and engine thuds in Bentley engines. | 3rd Jan 1938 | Box 146 \ 1 scan0157 | |
| Procedure for servicing main bearings during a decarbonization at 10,000 miles. | 3rd Jan 1938 | Box 146 \ 1 scan0158 | |
| Enclosed translation from Messrs Aubert et Duval concerning hykro steel and nitrogen hardening. | 3rd Jan 1937 | Box 146 \ 1 scan0159 | |
| Translated letter from Aubert & Duval to Franco Britannic Autos Ltd. regarding a steel specification. | 27th Dec 1937 | Box 146 \ 1 scan0160 | |
| The fitting of high-pressure petrol pumps to the Phantom III chassis, confirming no complaints. | 6th Jan 1938 | Box 146 \ 1 scan0161 | |
| Steering wobbles and joggles on the Phantom III chassis, detailing the fitting of stronger springs. | 6th Jan 1938 | Box 146 \ 1 scan0162 | |
| Repair procedure for a cracked cylinder block on a Bentley chassis. | 11th Jan 1938 | Box 146 \ 1 scan0163 | |
| Telegram asking about the mileage of aluminium big ends on a Phantom III. | 13th Jan 1938 | Box 146 \ 1 scan0164 | |
| Telegram received by telephone regarding car bearings. | 14th Jan 1938 | Box 146 \ 1 scan0165 | |
| Telegram received by telephone regarding the Halle trials car in Paris. | 14th Jan 1938 | Box 146 \ 1 scan0166 | |
| Telegram regarding an issue with car bearings. | 14th Jan 1938 | Box 146 \ 1 scan0167 | |
| Why conrods were not fitted to chassis 3 AZ 20 and a proposal to test them on a demonstration car. | 14th Jan 1938 | Box 146 \ 1 scan0168 | |
| Fitting of aluminium tin big-end bearings and the introduction of an overdrive gearbox for Bentley. | 18th Jan 1938 | Box 146 \ 1 scan0169 | |
| Telegram regarding the fitting of aluminium tin big end bearings to a Phantom Three vehicle. | 13th Jan 1938 | Box 146 \ 1 scan0170 | |
| Correcting a typographical error in a previous document regarding Marles steering and road wheels. | 20th Jan 1938 | Box 146 \ 1 scan0171 | |
| The production and testing schedule for 'N' Series cars, specifically concerning large tyres and Marles steering. | 20th Jan 1938 | Box 146 \ 1 scan0172 | |
| Correspondence regarding the examination and replacement of big end bearings on a Phantom III chassis. | 25th Jan 1938 | Box 146 \ 1 scan0173 | |
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