| Description | Date | Identifier | |
| Letter to Vandervell Products Ltd. arranging a meeting to discuss bearing materials. | 17th Sep 1936 | Box 115 \ 1 scan0069 | |
| Letter to a supplier discussing testing requirements for wheel bearings, half floating axles, and Bentley pinion bearings. | 18th Sep 1936 | Box 115 \ 1 scan0070 | |
| Big end bearing failures in 3½ litre Bentley engines and the history of bearing material testing. | 19th Sep 1936 | Box 115 \ 1 scan0071 | |
| The performance and testing of engine main bearings and big end bearings for Bentley and 25/30 HP units. | 19th Sep 1936 | Box 115 \ 1 scan0072 | |
| Technical memorandum discussing engine bearing performance, testing conclusions, and recommendations for different car models. | 19th Sep 1936 | Box 115 \ 1 scan0073 | |
| Performance of Hall's alloy bearings and the development work on a new bearing alloy. | 19th Sep 1936 | Box 115 \ 1 scan0074 | |
| Extract from a memo detailing the condition of the engine bearings for car 22-G-V. | 16th Aug 1936 | Box 115 \ 1 scan0075 | |
| New forged bearing alloy, proposing its immediate use for big-end bearings. | 19th Sep 1936 | Box 115 \ 1 scan0076 | |
| Bentley Engine Bearings and a request for recommendations for experimental testing. | 21th Sep 1936 | Box 115 \ 1 scan0077 | |
| Request to produce Hall's Forged Alloy AC.1 bearings and liners for endurance tests on Bentley and Phantom III units. | 21th Sep 1936 | Box 115 \ 1 scan0078 | |
| Letter to The Hoyt Metal Co. arranging a visit to discuss bearing practice. | 22th Sep 1936 | Box 115 \ 1 scan0079 | |
| Letter from Vandervell Products Ltd. confirming a meeting at the recipient's Works. | 22th Sep 1936 | Box 115 \ 1 scan0080 | |
| Letter from The Hoyt Metal Company of Great Britain, Limited, arranging a meeting. | 24th Sep 1936 | Box 115 \ 1 scan0081 | |
| Letter to Vandervell Products Ltd. regarding blueprints for strip type bearings for testing in a Bentley. | 25th Sep 1936 | Box 115 \ 1 scan0082 | |
| Examination of failed Bentley engine bearings from trials cars, identifying two separate issues. | 26th Sep 1936 | Box 115 \ 1 scan0083 | |
| Use of shims to improve oil supply and bearing development for a Trials car. | 26th Sep 1936 | Box 115 \ 1 scan0084 | |
| Letter from The Hoyt Metal Company confirming a meeting to discuss improved white metal bearings. | 28th Sep 1936 | Box 115 \ 1 scan0085 | |
| Directive to delay changing the material for connecting rod shims on the 25/30 HP & Bentley chassis pending experimental results. | 1st Oct 1936 | Box 115 \ 1 scan0086 | |
| Letter from The Hoyt Metal Company of Great Britain, Limited arranging a meeting. | 3rd Oct 1936 | Box 115 \ 1 scan0087 | |
| Letter to The Hoyt Metal Co. of Gt. Britain Ltd. confirming a works visit for two of their representatives. | 6th Oct 1936 | Box 115 \ 1 scan0088 | |
| Experiment with improved white metal for Phantom III big end bearings and the loan of a jig. | 8th Oct 1936 | Box 115 \ 1 scan0089 | |
| Experiment with Hoyt Metal's latest Babbitt on Phantom III big end bearings. | 8th Oct 1936 | Box 115 \ 1 scan0090 | |
| Request to despatch a White Metal Jig for a bearing on loan to the Hoyt Metal Co. | 8th Oct 1936 | Box 115 \ 1 scan0091 | |
| Recommendation for 14-B Babbitt composition and thickness. | 8th Oct 1936 | Box 115 \ 1 scan0092 | |
| Letter to The Hoyt Metal Co. regarding a jig for white metalling an aero bearing. | 9th Oct 1936 | Box 115 \ 1 scan0093 | |
| Costs and technical aspects of changing to Girling brakes. | 12th Oct 1936 | Box 115 \ 1 scan0094 | |
| Technical discussion on brake system design, including adjustments, 'Girling' brakes, and a critique of the Phantom III system. | 28th Oct 1936 | Box 115 \ 1 scan0095 | |
| Letter from The Hoyt Metal Company regarding the dispatch and price of 'NUMBER ELEVEN H' metal. | 28th Oct 1936 | Box 115 \ 1 scan0096 | |
| Note confirming the supply of big end bearing shims for a 4¼ litre Bentley being overhauled for Mr. Mays. | 30th Oct 1936 | Box 115 \ 1 scan0097 | |
| Requesting an official order for 80 lbs of number eleven 'H' metal from the Hoyt Metal Co. | 30th Oct 1936 | Box 115 \ 1 scan0098 | |
| Acceptance of specifications for shims for connecting rod big ends and main bearings. | 30th Oct 1936 | Box 115 \ 1 scan0099 | |
| Letter from the Bristol Aeroplane Company regarding test results of aluminium tin alloy bushes. | 2nd Nov 1936 | Box 115 \ 1 scan0100 | |
| Tests conducted on aluminium tin big end bushes. | 2nd Nov 1936 | Box 115 \ 1 scan0101 | |
| Laboratory report on a cracked Aluminium-Tin alloy bush, detailing crack formation, microstructure, and chemical analysis. | 6th Oct 1936 | Box 115 \ 1 scan0102 | |
| Metallurgical report concluding on casting defects and the properties of an aluminium-tin alloy. | 6th Oct 1936 | Box 115 \ 1 scan0103 | |
| Two photographs showing a perforated cylindrical component before (A) and after (B) a catastrophic failure. | 2nd Nov 1936 | Box 115 \ 1 scan0104 | |
| Crankshaft scoring with Hall's metal bearings and a request for a standardized treatment. | 2nd Nov 1936 | Box 115 \ 1 scan0105 | |
| The issues with regrinding crankshafts and a proposed alternative method. | 2nd Nov 1936 | Box 115 \ 1 scan0106 | |
| Urgent request for various bearing shells and blocks to be supplied to the Tin-Smiths shop for experimental production. | 2nd Nov 1936 | Box 115 \ 1 scan0107 | |
| Technical memorandum on the subject of regrinding crankshafts. | 2nd Nov 1936 | Box 115 \ 1 scan0108 | |
| Correcting the heat treatment procedure for 20/25 HP and Bentley chassis shims. | 3rd Nov 1936 | Box 115 \ 1 scan0109 | |
| Request to Hoffmann Chelmsford for the immediate despatch of one R.135 E bearing for an Experimental Roycar. | 5th Nov 1936 | Box 115 \ 1 scan0110 | |
| Letter from A.H.R. Fedden of Bristol Aeroplane Company to W.A. Robotham regarding rescheduling a meeting. | 5th Nov 1936 | Box 115 \ 1 scan0111 | |
| Forwarding a note from Sr. concerning Bentley bearings. | 6th Nov 1936 | Box 115 \ 1 scan0112 | |
| Letter from Vandervell Products Ltd. concerning bearing specifications for a six-cylinder engine. | 7th Nov 1936 | Box 115 \ 1 scan0113 | |
| Letter from Vandervell Products Ltd. discussing crankshaft bearings, pricing, and valve rocker bush design. | 7th Nov 1936 | Box 115 \ 1 scan0114 | |
| Installation of main bearings and thrust washers for a Bentley 6-cylinder engine. | 23th Oct 1936 | Box 115 \ 1 scan0115 | |
| Letter from Federal-Mogul Corporation providing a quotation and material details for crankshaft bearings. | 9th Nov 1936 | Box 115 \ 1 scan0116 | |
| Proposal from Federal-Mogul Corporation for the supply of bearings. | 9th Nov 1936 | Box 115 \ 1 scan0117 | |
| Letter to A.H.R. Fedden of The Bristol Aeroplane Company confirming a visit. | 9th Nov 1936 | Box 115 \ 1 scan0118 | |
| Letter to Vandervell Products Ltd. agreeing to the cost of £45 for three experimental sets of bearings for testing. | 10th Nov 1936 | Box 115 \ 1 scan0119 | |
| Letter to Vandervell Products Ltd. regarding bearings, rocker bushes, and crankshaft lubrication. | 11th Nov 1936 | Box 115 \ 1 scan0120 | |
| Letter discussing dimensions and design alternatives for main bearings and rocker bushes. | 11th Nov 1936 | Box 115 \ 1 scan0121 | |
| Preliminary experiments into the suitability of carburised Hykro material. | 11th Nov 1936 | Box 115 \ 1 scan0122 | |
| The suitability of materials and hardening processes for camshafts, Phantom III tappets, and rocker levers. | 11th Nov 1936 | Box 115 \ 1 scan0123 | |
| Letter from The Bristol Aeroplane Company Ltd to Mr. W. A. Rowbotham regarding a change in meeting arrangements. | 11th Nov 1936 | Box 115 \ 1 scan0124 | |
| Letter to Mr. Evans at The Bristol Aeroplane Company Ltd., confirming a meeting and declining a lunch invitation. | 12th Nov 1936 | Box 115 \ 1 scan0125 | |
| Experiments carried out on bearings for the 4 1/4 litre Bentley. | 15th Nov 1936 | Box 115 \ 1 scan0126 | |
| Engine big end bearing failure and subsequent modifications to the oiling system. | 13th Nov 1936 | Box 115 \ 1 scan0127 | |
| Telex message to Hoyt Metal Bearing Co. Ltd. requesting a supply of Z3 bearing material for testing. | 14th Nov 1936 | Box 115 \ 1 scan0128 | |
| Letter to A.H.R. Fedden discussing round bearings, a new cylinder head, and a lightweight Bentley demonstration car. | 14th Nov 1936 | Box 115 \ 1 scan0129 | |
| Page two of a letter to A.H.R. Fedden regarding chassis improvements and providing Mr. Slater's address. | 14th Nov 1936 | Box 115 \ 1 scan0130 | |
| The preparation of bearing shells with Z.3 whitemetal for a 15,000-mile test. | 16th Nov 1936 | Box 115 \ 1 scan0131 | |
| Letter from The Bristol Aeroplane Company Ltd regarding a collaboration on lead bronze testing and the 4 1/4 litre Bentley. | 16th Nov 1936 | Box 115 \ 1 scan0132 | |
| Analysis of a broken Bentley bearing cap failure. | 16th Nov 1936 | Box 115 \ 1 scan0133 | |
| Telex message urgently requesting Z.3 metal and its delivery date. | 17th Nov 1936 | Box 115 \ 1 scan0134 | |
| Clarifying the bearing programme for Phantom III units. | 17th Nov 1936 | Box 115 \ 1 scan0135 | |
| Telegram received by telephone concerning the dispatch of Z.3 metal by train. | 17th Nov 1936 | Box 115 \ 1 scan0136 | |
| Letter to the Hoyt Metal Company requesting information and samples of two Babbitt materials. | 18th Nov 1936 | Box 115 \ 1 scan0137 | |
| Post Office telegram confirming the dispatch of metal by train. | 18th Nov 1936 | Box 115 \ 1 scan0138 | |
| Letter from The Hoyt Metal Company confirming the despatch of 'Z3' metal by train. | 18th Nov 1936 | Box 115 \ 1 scan0139 | |
| Requesting the production of a rear main bearing for a Bentley, to be sent to the Paris Depot. | 19th Nov 1936 | Box 115 \ 1 scan0140 | |
| Analysis of issues with Hall's Bearing Alloy, including metal flow and crankshaft scoring. | 19th Nov 1936 | Box 115 \ 1 scan0141 | |
| Technical report on the investigation of various metal bearing materials, including Hall's metal and white metal alloys. | 19th Nov 1936 | Box 115 \ 1 scan0142 | |
| The experimental testing of white metal and cadmium bearings for big ends and main bearings. | 19th Nov 1936 | Box 115 \ 1 scan0143 | |
| Summary of plans for Bentley and Phantom III units, Continental tests, and views on engine components. | 19th Nov 1936 | Box 115 \ 1 scan0144 | |
| Requesting an official order for Z3 bearing material received for testing from Hoyts Metal Co. | 20th Nov 1936 | Box 115 \ 1 scan0145 | |
| Bristol's request to try their big end bush in lead bronze to the latest specification. | 21th Nov 1936 | Box 115 \ 1 scan0146 | |
| Technical memo discussing bearing wear, hardness, material properties, and testing of aluminium alloys. | 21th Nov 1936 | Box 115 \ 1 scan0147 | |
| Continuation of a report discussing tests on alloys with tin, antimony, and manganese for engine use. | 21th Nov 1936 | Box 115 \ 1 scan0148 | |
| Letter from the Experimental Dept. to A.H.R. Fedden of The Bristol Aeroplane Co., Ltd. regarding a lead bronze bearing. | 21th Nov 1936 | Box 115 \ 1 scan0149 | |
| Letter inquiring about new bearing metal compositions and experiences with different babbitt materials. | 23th Nov 1936 | Box 115 \ 1 scan0150 | |
| Status update on the machining of various engine bearings made from Hoyts Z.3. Metal. | 23th Nov 1936 | Box 115 \ 1 scan0151 | |
| Requesting procurement and despatch of 25/30 bearing shells for metalling with 'Satco'. | 26th Nov 1936 | Box 115 \ 1 scan0152 | |
| Letter to The Hoyt Metal Co. Ltd. detailing the failure of their 'Eleven H. metal' in Bentley main bearing tests and arranging for a new test with 'Satco' metal. | 26th Nov 1936 | Box 115 \ 1 scan0153 | |
| Seizures of 3 1/2 litre big end bearings and the prohibitive cost of a proposed modification. | 26th Nov 1936 | Box 115 \ 1 scan0154 | |
| Seizures of 3 1/2 litre big ends due to oil supply issues and potential modifications. | 25th Nov 1936 | Box 115 \ 1 scan0155 | |
| Seizures of 3 ½ litre big end bearings, their causes, and proposed solutions. | 26th Nov 1936 | Box 115 \ 1 scan0156 | |
| Request to send specially sized main bearings and shims to the Paris Depot for car B.6.BN. | 30th Nov 1936 | Box 115 \ 1 scan0157 | |
| Seizure of big end bearings and related lubrication failures. | 3rd Dec 1936 | Box 115 \ 1 scan0158 | |
| Engine bearing types, oil grooves, and a specific customer case. | 3rd Dec 1936 | Box 115 \ 1 scan0159 | |
| Letter from The Hoyt Metal Company discussing metal testing results and recommendations for engine alloys. | 3rd Dec 1936 | Box 115 \ 1 scan0160 | |
| Letter to The Hoyt Metal Company discussing the failure of bearings due to adhesion, and ongoing experiments with alternative metals like Z.3 and Satco. | 4th Dec 1936 | Box 115 \ 1 scan0161 | |
| From Rm to the Laboratory regarding the composition and sourcing of an American alloy (14.B) for Bentley bearing shells. | 4th Dec 1936 | Box 115 \ 1 scan0162 | |
| Trial of Bentley main bearings lined with a specific Magnolia Metal alloy. | 4th Dec 1936 | Box 115 \ 1 scan0163 | |
| Requesting a tabulated list and analysis of bearing metals, referencing attached notes for future tests. | 4th Dec 1936 | Box 115 \ 1 scan0164 | |
| Trialling a set of Bentley main bearings with a specific Magnolia Metal lining. | 4th Dec 1936 | Box 115 \ 1 scan0165 | |
| Sourcing and testing an American alloy for use in Bentley steel bearing shells. | 4th Dec 1936 | Box 115 \ 1 scan0166 | |
| Letter from the Hoyt Metal Company regarding the running results of Number Eleven Z3 and their own development of SATCO metal. | 5th Dec 1936 | Box 115 \ 1 scan0167 | |
| Letter to the Cadillac Motor Car Co. discussing whitemetal bearing alloys. | 8th Dec 1936 | Box 115 \ 1 scan0168 | |
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