| Description | Date | Identifier | |
| Engine bearing materials and design, comparing whitemetal with aluminium tin alloy. | 29th Nov 1937 | Box 115 \ 3 scan0137 | |
| Standardisation of main bearings and connecting rods, specifically the removal of shims for the Wraith model. | 2nd Dec 1937 | Box 115 \ 3 scan0138 | |
| Requesting the production of 15 sets of Big End Bearings for the Phantom III. | 7th Dec 1937 | Box 115 \ 3 scan0139 | |
| Material instability of A.C.2 and the expected production of EB.2810 Bearings from an AC6 Ring. | 8th Dec 1937 | Box 115 \ 3 scan0140 | |
| Laboratory report on the examination of A.C.7 bearings and proposals for improving the casting process. | 9th Dec 1937 | Box 115 \ 3 scan0141 | |
| Index describing sections of billets, fractures of bearings, and a microphotograph of a bearing flange. | 16th Nov 1937 | Box 115 \ 3 scan0142 | |
| Laboratory report detailing the unsatisfactory condition of a cast A.C.7 alloy part. | 9th Dec 1937 | Box 115 \ 3 scan0143 | |
| Laboratory report on an A.C.7 alloy casting showing an unsatisfactory internal condition. | 9th Dec 1937 | Box 115 \ 3 scan0144 | |
| Fractures of A.C.7 bearings from Cast B.9 showing large trapped inclusions. | 9th Dec 1937 | Box 115 \ 3 scan0145 | |
| Laboratory report comparing the microstructure of two A.C.7 bearings. | 9th Dec 1937 | Box 115 \ 3 scan0146 | |
| Comparative Brinell and V.P.N. hardness test results for A.C.7. Bearing Alloy. | 16th Nov 1937 | Box 115 \ 3 scan0147 | |
| The condition of Wraith bearings after endurance testing, discussing main bearings and oil seal performance. | 10th Dec 1937 | Box 115 \ 3 scan0148 | |
| Photograph of Wraith III No. 2 Unit main bearings in white metal after testing. | 10th Dec 1937 | Box 115 \ 3 scan0149 | |
| Photograph showing the condition of Wraith III No.2 Unit big end bearings after road and test bed endurance runs. | 10th Dec 1937 | Box 115 \ 3 scan0150 | |
| Photograph showing worn white metal main bearings from a Wraith III No.2 unit, with details of running times. | 15th Dec 1937 | Box 115 \ 3 scan0151 | |
| Benefits and sales strategy for the Bentley Overdrive Box. | 15th Dec 1937 | Box 115 \ 3 scan0152 | |
| Laboratory report on the examination of scored main bearings from a Bentley Chassis B.156 L.S. | 17th Dec 1937 | Box 115 \ 3 scan0153 | |
| Note regarding an engine fitted with a new V.C.M. crankshaft and A.C.7 bearings. | 17th Dec 1937 | Box 115 \ 3 scan0154 | |
| Laboratory report showing a micrograph of a Bentley A.C.7 Main Bearing No.5. | 17th Dec 1937 | Box 115 \ 3 scan0155 | |
| Laboratory report showing a microscopic image of an oil extract from a Bentley engine crankshaft. | 17th Dec 1937 | Box 115 \ 3 scan0156 | |
| Laboratory report showing a photograph of metallic debris extracted from the oil of a V.C.M. crankshaft. | 17th Dec 1937 | Box 115 \ 3 scan0157 | |
| Hardness of AC 7 production bearings, comparing them to AC 6 alloy and proposing new acceptance limits. | 18th Dec 1934 | Box 115 \ 3 scan0158 | |
| Experimental work on the form of casting for bearings to improve material quality. | 20th Dec 1937 | Box 115 \ 3 scan0159 | |
| Instructions for changing Bentley main bearings due to production changes. | 22th Dec 1937 | Box 115 \ 3 scan0160 | |
| Letter from The Light Production Co. Ltd discussing an experimental tin coating process on aluminium bearings. | 22th Dec 1937 | Box 115 \ 3 scan0161 | |
| Confirming experiments on casting techniques for modified AC7 bearings. | 23th Dec 1937 | Box 115 \ 3 scan0162 | |
| Maintenance and inspection procedures for Bentley main bearings. | 31th Dec 1937 | Box 115 \ 3 scan0163 | |
| Alterations for fitting new whitemetal rear bearings to service engines. | 31th Dec 1937 | Box 115 \ 3 scan0164 | |
| Fitting of Whitemetal main bearings without liners to a Wraith III No.4 Unit. | 4th Jan 1938 | Box 115 \ 3 scan0165 | |
| Modifications and fitting instructions for Bentley Main Bearings on the 4 1/4 litre chassis. | 5th Jan 1938 | Box 115 \ 3 scan0166 | |
| Failure of Phantom III big-end bearings and urging the production of a new design. | 7th Jan 1938 | Box 115 \ 3 scan0167 | |
| Status update on the adaptation of Halls Metal Bushes for existing bearing halves. | 7th Jan 1938 | Box 115 \ 3 scan0168 | |
| The results of an oil flow test on Bentley main bearings, comparing 'white metal' and 'Hall's Metal' types. | 11th Jan 1938 | Box 115 \ 3 scan0169 | |
| Bentley motor car connected to a mobile testing apparatus in a workshop. | 11th Jan 1938 | Box 115 \ 3 scan0170 | |
| Photograph of a portable workshop testing or flushing rig with associated components. | 11th Jan 1938 | Box 115 \ 3 scan0171 | |
| Schematic of a motor-driven fluid delivery system with a clutch and reduction box. | 14th Jan 1938 | Box 115 \ 3 scan0172 | |
| The interference fit and nip allowance for replacement Bentley main bearings. | 14th Jan 1938 | Box 115 \ 3 scan0173 | |
| Production and fitting schedule for Phantom III big end bearings. | 15th Jan 1938 | Box 115 \ 3 scan0174 | |
| The supply of billets to produce Bentley Big end bearings. | 21th Jan 1938 | Box 115 \ 3 scan0175 | |
| Requesting an examination of a badly scored and partially seized big end bearing to determine the cause of failure. | 21th Jan 1938 | Box 115 \ 3 scan0176 | |
| Letter to Vandervell Products Ltd. regarding the dispatch of a Bentley type dynamo with a central box. | 21th Jan 1938 | Box 115 \ 3 scan0177 | |
| Letter from Vandervell Products regarding dynamo tests and acquiring 'Halls' metal castings for testing. | 22th Jan 1938 | Box 115 \ 3 scan0178 | |
| Laboratory report on the failure analysis of a Wraith No.6 bearing made from A.G.6 alloy. | 24th Jan 1938 | Box 115 \ 3 scan0179 | |
| Request to arrange an order for 6 Bentley Big End Billets in AC.6 alloy, to be despatched to Vandervell Products Ltd. | 25th Jan 1938 | Box 115 \ 3 scan0180 | |
| Supply of Phantom III big end bearings in AC.6 material to the Paris depot for a customer's car. | 28th Jan 1938 | Box 115 \ 3 scan0181 | |
| Letter to Vandervell Products Ltd. regarding the despatch and heat treatment of Aluminium-Tin alloy bearing billets. | 28th Jan 1938 | Box 115 \ 3 scan0182 | |
| Request to conduct tests on the Wraith concerning wear on oil pump bearings for potential standardisation. | 28th Jan 1938 | Box 115 \ 3 scan0183 | |
| Confirming an order for 6 Bentley Big End Billets in AC.6 alloy for Vandervell Products Ltd. | 25th Jan 1938 | Box 115 \ 3 scan0184 | |
| 6 Big-End Billets of A.C.6 Alloy for Bentley Big-End Bearings to be sent to Messrs Vandervell Products Ltd. | 28th Jan 1938 | Box 115 \ 3 scan0185 | |
| Letter from Vandervell Products Ltd. regarding sample castings of Aluminium-Tin alloy AC.6 and duty analysis for U.S.A. exports. | 31th Jan 1938 | Box 115 \ 3 scan0186 | |
| The fitting of modified connecting rod bearings made of A.C.6 material for the Phantom 111 'D' Series. | 2nd Feb 1938 | Box 115 \ 3 scan0187 | |
| Phantom III connecting rod bearings in A.C.6 material, requesting test data and a Standardisation Sheet. | 3rd Feb 1938 | Box 115 \ 3 scan0188 | |
| Responding to queries about Bentley bearings, steering modifications, and a streamline car. | 4th Feb 1938 | Box 115 \ 3 scan0189 | |
| Recommendations for a car's chassis, steering, axle, and engine head. | 4th Feb 1938 | Box 115 \ 3 scan0190 | |
| Testing and potential standardization of Phantom III connecting rod bearings made of A.C.6 material. | 4th Feb 1938 | Box 115 \ 3 scan0191 | |
| Confirming the continued use of AC.6 material for Phantom III connecting rod bearings. | 8th Feb 1938 | Box 115 \ 3 scan0192 | |
| Fitment of Phantom III Connecting Rod Bearings in A.C.6 material, subject to satisfactory testing. | 9th Feb 1938 | Box 115 \ 3 scan0193 | |
| Costing and quotation details for the production of Bentley Main Bearings from Hall's. | 9th Feb 1938 | Box 115 \ 3 scan0194 | |
| Confirming a telephone order for Bentley main and connecting rod bearings in AC.9 alloy. | 5th Mar 1938 | Box 115 \ 3 scan0195 | |
| Letter from Vandervell Products Ltd. regarding a drawing for bearings for the Wraith III model. | 5th Mar 1938 | Box 115 \ 3 scan0196 | |
| Modifications to prevent big end seizures in 4¼ litre Bentley engines. | 8th Mar 1938 | Box 115 \ 3 scan0197 | |
| Proposal discussing the cost and procedure for drilling extra holes in a crankshaft without removing it from the engine. | 8th Mar 1938 | Box 115 \ 3 scan0198 | |
| Production issues and high scrap rates of Bentley III Tin Alloy Bearings due to porosity. | 8th Mar 1938 | Box 115 \ 3 scan0199 | |
| Letter to Vandervell Products Ltd. regarding adjustments to bearing drawings for an engine. | 9th Mar 1938 | Box 115 \ 3 scan0200 | |
| Conference report discussing production difficulties and methods for Aluminium-Tin alloy bearings. | 9th Mar 1938 | Box 115 \ 3 scan0201 | |
| The heat treatment of centrifugally cast bearings and the production of dies for A.C.9. Alloy. | 9th Mar 1938 | Box 115 \ 3 scan0202 | |
| The scrap cost of chassis engine bearing production and a recommendation to switch to centrifuged bearings. | 10th Mar 1938 | Box 115 \ 3 scan0203 | |
| The examination of Bentley engine bearings made from AC2 material after trial runs. | 11th Mar 1938 | Box 115 \ 3 scan0204 | |
| The condition of pistons and bearings after testing, and other vehicle issues like axle shake. | 11th Mar 1938 | Box 115 \ 3 scan0205 | |
| Big end failures on the 4 1/4 litre Bentley engine and a proposed modification to the oil supply system. | 14th Mar 1938 | Box 115 \ 3 scan0206 | |
| Testing of centrifugally cast A.C.2 main bearings and recommending further trials before a production change. | 14th Mar 1938 | Box 115 \ 3 scan0207 | |
| Confirmation of an order for centrifugally cast Bentley bearings in AC9 material, with related internal queries. | 15th Mar 1938 | Box 115 \ 3 scan0208 | |
| The continued use of cast bearings over centrifugal bearings. | 16th Mar 1938 | Box 115 \ 3 scan0209 | |
| Change in manufacturing process for Phantom III connecting rod bearings to reduce scrap, and the testing of a new material and method. | 17th Mar 1938 | Box 115 \ 3 scan0210 | |
| Sending centri-cast and statically cast Bentley Main Bearings for experimental testing, including heat treatment instructions. | 17th Mar 1938 | Box 115 \ 3 scan0211 | |
| The testing of Halls Metal Connecting Rod Bearings on a 'D' Series Chassis without an oil cooler. | 18th Mar 1938 | Box 115 \ 3 scan0212 | |
| The production of gravity die-cast Bentley big end bearings in A.C.9 material. | 24th Mar 1938 | Box 115 \ 3 scan0213 | |
| Fitting of Vandervell bearings to a Bentley III crankcase. | 28th Mar 1938 | Box 115 \ 3 scan0214 | |
| Confirming the immediate manufacture of a die for Bentley Bearings AC9 material. | 26th Mar 1938 | Box 115 \ 3 scan0215 | |
| Use of Zinc Die Cast Camshaft Bearings as used by Morris Motors. | 1st Apr 1938 | Box 115 \ 3 scan0216 | |
| Letter to Vandervell Products Ltd. chasing a delivery of bearings for a crankcase. | 7th Apr 1938 | Box 115 \ 3 scan0217 | |
| Delaying the specification for Hall's metal big end bearings for the Wraith III, pending endurance testing of a new A.C.9 alloy. | 22th Apr 1938 | Box 115 \ 3 scan0218 | |
| Costing and production details for sets of Whitemetal main bearings. | 2nd May 1938 | Box 115 \ 3 scan0219 | |
| Fitting whitemetal main bearings without liners to a Wraith III No.4 Unit, listing experimental part numbers. | 4th Jan 1938 | Box 115 \ 3 scan0220 | |
| Letter to Vandervell Products Ltd. requesting the dispatch date for a special set of bearings for a crankcase. | 3rd May 1938 | Box 115 \ 3 scan0221 | |
| Letter from Vandervell Products Ltd. confirming the despatch by parcel post of a special set of bearings. | 5th May 1938 | Box 115 \ 3 scan0222 | |
| Official order for main bearings from Vandervell Products Ltd. | 7th May 1938 | Box 115 \ 3 scan0223 | |
| The results of endurance testing on aluminium tin bearings. | 7th May 1938 | Box 115 \ 3 scan0224 | |
| Endurance test report on die-cast versus centri-cast metal bearings for a Bentley III unit. | 9th May 1938 | Box 115 \ 3 scan0225 | |
| Recommendation and test results for using AC.9 die-cast material for engine bearings. | 9th May 1938 | Box 115 \ 3 scan0226 | |
| Production features tested, including crankshafts, rods, and floating little end bushes. | 9th Sep 1938 | Box 115 \ 3 scan0227 | |
| The production of AC9 Aluminium Tin Bearings as Die Castings. | 10th May 1938 | Box 115 \ 3 scan0228 | |
| Instruction to immediately use A.C.9 Aluminium Tin Die cast bearings for all chassis. | 11th May 1938 | Box 115 \ 3 scan0229 | |
| Two serious complaints of Bentley bearing failures and requesting a report on the bearing types. | 12th May 1938 | Box 115 \ 3 scan0230 | |
| The replacement of AC.6 and AC.7 bearings with A.C.9 Aluminium Tin bearings. | 13th May 1938 | Box 115 \ 3 scan0231 | |
| Bentley bearing failures on chassis B.26.LS and B.182.KT. | 14th May 1938 | Box 115 \ 3 scan0232 | |
| Letter to Vandervell Products Ltd. arranging a visit to observe the fitting of supplied main bearings. | 3rd Jun 1938 | Box 115 \ 3 scan0233 | |
| Letter to Vandervell Products Ltd. requesting a quotation and trial supply for rocker and little end bushes. | 9th Jun 1938 | Box 115 \ 3 scan0234 | |
| Page 2 of a letter detailing the specifications of a little end bush and plans for a post-test inspection of main bearings. | 9th Jun 1938 | Box 115 \ 3 scan0235 | |
| Letter to Vandervell Products Ltd. regarding a missing quotation and dimensional specifications for bushes. | 13th Jun 1938 | Box 115 \ 3 scan0236 | |
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