| Description | Date | Identifier | |
| Engine performance data, bearing issues, and combustion chamber clearances. | 10th Nov 1937 | Box 116 \ 1 scan0006 | |
| Engine performance, supercharger details, and methods for controlling oil consumption and bore wear. | 10th Nov 1937 | Box 116 \ 1 scan0007 | |
| Engine materials, cooling systems, equipment, and an agreement to supply experimental bearings to Dennis. | 10th Nov 1937 | Box 116 \ 1 scan0008 | |
| Request to prepare centrifugally cast bearings for Dennis Bearings and provide a cost estimate. | 15th Nov 1937 | Box 116 \ 1 scan0009 | |
| Letter to Dennis Bros. Ltd. regarding the production and testing of aluminium-tin bearings. | 18th Nov 1937 | Box 116 \ 1 scan0010 | |
| The production of bearings for Dennis Bros. using a specific alloy and drawing. | 18th Nov 1937 | Box 116 \ 1 scan0011 | |
| Suitability of aluminium bearing alloys versus hardened or nitriding steel for crankshafts. | 18th Nov 1937 | Box 116 \ 1 scan0012 | |
| Production method for Dennis Bearings, changing from the centrifugal process back to production from billets. | 23th Nov 1937 | Box 116 \ 1 scan0013 | |
| Letter from Dennis Bros Ltd apologising for a delay in reply due to the Motor Show and a shortage of connecting rod stampings. | 25th Nov 1937 | Box 116 \ 1 scan0014 | |
| Letter to Messrs. Dennis Bros. Ltd. acknowledging the dispatch of connecting rods. | 30th Nov 1937 | Box 116 \ 1 scan0015 | |
| Letter from Dennis Brothers Ltd regarding the despatch of 8 'O' type Conn Rods with experimental bearings. | 3rd Dec 1937 | Box 116 \ 1 scan0016 | |
| Letter from Dennis Bros Ltd regarding the supply and testing of experimental connecting rods and bearings. | 11th Dec 1937 | Box 116 \ 1 scan0017 | |
| Letter to Dennis Bros. Ltd. regarding the delivery and recommended clearances for connecting rod bearings. | 15th Dec 1937 | Box 116 \ 1 scan0018 | |
| Letter from Dennis Bros Ltd regarding the delivery and production of special connecting rods and bearings. | 16th Dec 1937 | Box 116 \ 1 scan0019 | |
| Letter to Messrs. Dennis Bros. Ltd. concerning the dispatch and final boring of connecting rods and bearings. | 23th Dec 1937 | Box 116 \ 1 scan0020 | |
| Justifying the machining time expended on Dennis tin alloy bearings. | 14th Jan 1938 | Box 116 \ 1 scan0021 | |
| Letter to Messrs Dennis Bros regarding the testing progress of supplied Aluminium-Tin bearings and arranging a visit. | 24th Jan 1938 | Box 116 \ 1 scan0022 | |
| Letter from Dennis Brothers Ltd. regarding tests on Aluminium-Tin bearings and a modification to connecting rods. | 25th Jan 1938 | Box 116 \ 1 scan0023 | |
| Letter from Dennis Brothers Ltd. regarding the testing and inspection of an experimental set of bearings in an engine. | 23th Feb 1938 | Box 116 \ 1 scan0024 | |
| Follow-up letter to a customer regarding the testing of bearings and arranging a visit. | 24th Feb 1938 | Box 116 \ 1 scan0025 | |
| Letter from Dennis Brothers Ltd regarding the condition of engine bearings after testing and scheduling further tests. | 26th Feb 1938 | Box 116 \ 1 scan0026 | |
| Letter to Messrs Dennis Bros Ltd. requesting information on the performance of supplied Aluminium-Tin bearings. | 5th Apr 1938 | Box 116 \ 1 scan0027 | |
| Letter from Dennis Bros Ltd discussing the performance and wear of aluminium-tin bearings after 110 hours of testing. | 12th Apr 1938 | Box 116 \ 1 scan0028 | |
| Page 2 of a letter from Dennis Brothers Limited regarding a visit to Guildford to inspect an engine. | 17th Feb 1938 | Box 116 \ 1 scan0029 | |
| Dimensional record of a new crankshaft after a running test. | 17th Feb 1938 | Box 116 \ 1 scan0030 | |
| Record of crankshaft wear dimensions for a Type 'O' engine after 110.25 hours of running. | 11th Apr 1938 | Box 116 \ 1 scan0031 | |
| Photographic print of connecting rods and big end bearing caps. | 11th Apr 1938 | Box 116 \ 1 scan0032 | |
| Photograph of pistons and connecting rod big-end bearings laid out for inspection. | 22th Apr 1938 | Box 116 \ 1 scan0033 | |
| Letter to Dennis Bros. Ltd. discussing the condition of bearings and requesting further test data and performance comparisons. | 22th Apr 1938 | Box 116 \ 1 scan0034 | |
| Letter from Dennis Bros Ltd discussing the results and further testing of experimental big end bearings. | 25th Apr 1938 | Box 116 \ 1 scan0035 | |
| Page two of a letter from Dennis Brothers Limited regarding arrangements for bearing production. | 26th Apr 1938 | Box 116 \ 1 scan0036 | |
| Letter to Messrs. Dennis Bros., Ltd. regarding bearings marketed by Messrs. Wellworthy's and material modifications. | 26th Apr 1938 | Box 116 \ 1 scan0037 | |
| Letter requesting information on shaft hardness from tests on RR.AC.6 Aluminium-Tin bearings. | 10th May 1938 | Box 116 \ 1 scan0038 | |
| Letter from Dennis Bros Ltd arranging an inspection of a 4-cylinder C.I. experimental engine. | 24th Jun 1938 | Box 116 \ 1 scan0039 | |
| Letter to Dennis Bros Ltd. regarding the supply of main bearings with AC.9 alloy and recommendations for oil filters. | 28th Jun 1938 | Box 116 \ 1 scan0040 | |
| Page 2 of a letter discussing the supply and convenience of different filter types. | 28th Jun 1938 | Box 116 \ 1 scan0041 | |
| Letter from Dennis Bros Ltd concerning the supply and specifications of engine components like bearings, crankshafts, and oil filters. | 2nd Jul 1938 | Box 116 \ 1 scan0042 | |
| Letter from Dennis Brothers Limited discussing main bearing tests, oil cleaning, and forwarding photographs of big end bearings. | 2nd Jul 1938 | Box 116 \ 1 scan0043 | |
| Photograph of connecting rods with their big-end bearing shells laid out for inspection. | 9th Jul 1938 | Box 116 \ 1 scan0045 | |
| Letter from Dennis Bros Ltd reporting on the failure of aluminium centre main bearings (A.C.9 material) during engine testing. | 9th Jul 1938 | Box 116 \ 1 scan0046 | |
| Letter from Dennis Brothers Limited regarding bearing growth and material hardness differences. | 9th Jul 1938 | Box 116 \ 1 scan0047 | |
| Blueprint graph plotting load and pressure against RPM for an engine's centre main bearing. | 11th Jul 1938 | Box 116 \ 1 scan0048 | |
| Letter from Dennis Bros Ltd regarding the inspection of A.C.9 bearings and enclosing a corrected blueprint. | 11th Jul 1938 | Box 116 \ 1 scan0049 | |
| Investigation into the failure of an AC.9 main bearing in a four-cylinder petrol engine during a visit to Dennis Bros. at Guildford. | 18th Jul 1938 | Box 116 \ 1 scan0050 | |
| Load reduction through crank balancing, bearing fit, and heat treatment procedures. | 18th Jul 1938 | Box 116 \ 1 scan0051 | |
| Letter to Wellworthy Piston Rings Ltd. regarding Bristol fully-floating bushes and a potential visit to De Havilland's. | 24th Aug 1938 | Box 116 \ 1 scan0052 | |
| Letter to Dennis Bros., Ltd. regarding a centre main bearing failure and requesting a crankshaft drawing. | 25th Aug 1938 | Box 116 \ 1 scan0053 | |
| Letter from Dennis Brothers Ltd. regarding engine component specifications and weights. | 27th Aug 1938 | Box 116 \ 1 scan0054 | |
| Engineering blueprint for a crankshaft, showing multiple cross-sections and detailed dimensions. | 31th Dec 1936 | Box 116 \ 1 scan0055 | |
| Photograph of a damaged two-part bearing alongside two circular performance diagrams. | 31th Aug 1938 | Box 116 \ 1 scan0056 | |
| Letter from Dennis Bros Ltd discussing engine performance, bearing tests, and seizure issues. | 1st Sep 1938 | Box 116 \ 1 scan0057 | |
| Page 2 of a report detailing an engine test procedure which resulted in a seizure. | 3rd Sep 1938 | Box 116 \ 1 scan0058 | |
| Letter to Dennis Bros Ltd. regarding the failure of a centre main bearing, discussing Torsiograph records and bending loads. | 3rd Sep 1938 | Box 116 \ 1 scan0059 | |
| Letter to Dennis Bros Ltd. regarding a problem with a centre main bearing on a 4-cylinder petrol engine. | 6th Sep 1938 | Box 116 \ 1 scan0060 | |
| Summary of calculations and conclusions regarding the Dennis Crankshaft 34442 and its centre bearing. | 7th Sep 1938 | Box 116 \ 1 scan0061 | |
| Analysis of the Dennis crank, identifying high bearing pressures and proposing design improvements like adding more bearings or balance weights. | 7th Sep 1938 | Box 116 \ 1 scan0062 | |
| Letter from Dennis Bros Ltd discussing crankshaft bending loads and bearing tests for a 'C' Type 4-cylinder engine. | 8th Sep 1938 | Box 116 \ 1 scan0063 | |
| Letter from Dennis Brothers Ltd discussing the effects of grinding a flat on a centre main journal. | 9th Sep 1938 | Box 116 \ 1 scan0064 | |
| Letter from Dennis Bros Ltd discussing modifications to a centre main bearing for a petrol engine. | 9th Sep 1938 | Box 116 \ 1 scan0065 | |
| Page 2 of a letter from Dennis Brothers Limited regarding oil groove design in bearings and its effect on journal wear. | 20th Sep 1927 | Box 116 \ 1 scan0066 | |
| Engine redesign policy for Dennis Bros. and scheduling a meeting with H.D.A. Ltd. | 20th Sep 1927 | Box 116 \ 1 scan0067 | |
| Letter to Dennis Bros. regarding crankshaft loading and bearing issues on a 'C' type engine. | 10th Sep 1938 | Box 116 \ 1 scan0068 | |
| Letter from Dennis Brothers Ltd. regarding aluminium alloy bearings and a request for original blueprints. | 8th Feb 1939 | Box 116 \ 1 scan0069 | |
| Letter to Dennis Bros. Ltd. regarding a print of a drawing for bearing X.1041. | 14th Feb 1939 | Box 116 \ 1 scan0070 | |
| Letter from Wellworthy Piston Rings regarding sample bearings for Ruston & Hornsby Ltd., discussing designs and pricing. | 26th Oct 1938 | Box 116 \ 1 scan0071 | |
| Letter to Wellworthy Piston Rings Ltd. requesting a crankshaft drawing, material data, hardness, lubrication arrangement, and oil flow figures. | 29th Oct 1938 | Box 116 \ 1 scan0072 | |
| Letter from Wellworthy Piston Rings Ltd regarding Ruston & Hornsby Bearings. | 9th Nov 1938 | Box 116 \ 1 scan0073 | |
| Letter from Ruston & Hornsby Ltd. to Wellworthy Piston Rings Ltd. with crankshaft material and lubrication specifications. | 8th Nov 1938 | Box 116 \ 1 scan0074 | |
| Letter from Wellworthy Piston Rings regarding AC.9 bearings, discussing oil grooves and a proposed heat treatment and testing plan. | 14th Nov 1938 | Box 116 \ 1 scan0075 | |
| Continuation of a letter from Wellworthy Piston Rings regarding hardness testing methods. | 23th Jul 1937 | Box 116 \ 1 scan0076 | |
| Letter to Vauxhall Motors regarding the development and benefits of a new Aluminium Tin Bearing Alloy. | 23th Jul 1937 | Box 116 \ 1 scan0077 | |
| Letter from Vauxhall Motors acknowledging correspondence and advising of Alex Taub's absence. | 24th Jul 1937 | Box 116 \ 1 scan0078 | |
| Letter from Vauxhall Motors regarding rod bearings and Buick '38 engine data. | 1st Sep 1937 | Box 116 \ 1 scan0079 | |
| Letter to A. Taub of Vauxhall Motors concerning 1938 Buick cars and arranging a visit to demonstrate bearing results. | 2nd Sep 1937 | Box 116 \ 1 scan0080 | |
| Letter to The Associated Equipment Co., Ltd. regarding a main bearing problem and the suitability of lead bronze alloy. | 21th Dec 1937 | Box 116 \ 1 scan0081 | |
| Letter from The Associated Equipment Co Ltd arranging a meeting to discuss an experiment on oil engines using aluminium alloy bearings. | 22th Dec 1937 | Box 116 \ 1 scan0082 | |
| Letter to The Associated Equipment Co. Ltd. regarding aluminium bearings and arranging a follow-up meeting. | 29th Dec 1937 | Box 116 \ 1 scan0083 | |
| Letter from The Associated Equipment Co Ltd arranging a meeting to discuss bearing materials. | 31th Dec 1937 | Box 116 \ 1 scan0084 | |
| Letter to The Associated Equipment Co. Ltd. confirming a visit on the 5th instant. | 3rd Jan 1938 | Box 116 \ 1 scan0085 | |
| Letter to The Associated Equipment Co. Ltd. regarding an order for main bearing blanks and an enclosed data chart. | 10th Jan 1938 | Box 116 \ 1 scan0086 | |
| Letter from Associated Equipment Co Ltd regarding the manufacture of aluminium alloy main bearing shells. | 7th Jan 1938 | Box 116 \ 1 scan0087 | |
| Technical drawing of a main bearing centre top half. | 18th Dec 1933 | Box 116 \ 1 scan0088 | |
| Detailed engineering drawing of a main intermediate top half bearing. | 18th Dec 1933 | Box 116 \ 1 scan0089 | |
| Technical drawing of a main bearing front top half. | 29th Jun 1933 | Box 116 \ 1 scan0090 | |
| Technical drawing for a main bearing rear top half, showing dimensions and material specifications. | 16th Dec 1933 | Box 116 \ 1 scan0091 | |
| Request to produce rough machined main bearing blanks for A.E.C. in A.C.7 alloy. | 11th Jan 1938 | Box 116 \ 1 scan0092 | |
| Visit to A.E.C. Ltd. regarding the supply of metal bearings and their engine requirements. | 13th Jan 1938 | Box 116 \ 1 scan0093 | |
| Engine bearing materials, crankcases, and design considerations discussed with A.E.C. | 13th Jan 1938 | Box 116 \ 1 scan0094 | |
| Cylinder liner materials, chemical composition, and performance from commercial vehicle manufacturers. | 13th Jan 1938 | Box 116 \ 1 scan0095 | |
| Letter from The Associated Equipment Co Ltd enquiring about a delivery date for a set of die-cast aluminium main bearings. | 25th Jan 1938 | Box 116 \ 1 scan0096 | |
| Letter regarding a delay with Aluminium-tin bearings due to casting issues and discussing the merits of different oil filtering systems. | 28th Jan 1938 | Box 116 \ 1 scan0097 | |
| Letter discussing a follow-up visit to examine experimental sets of bearings. | 31th Jan 1938 | Box 116 \ 1 scan0098 | |
| Letter from The Associated Equipment Co Ltd regarding sample aluminium tin bearings and clearance advice. | 31th Jan 1938 | Box 116 \ 1 scan0099 | |
| Letter regarding a delay in the delivery of bearings due to faulty castings and confirming clearance specifications. | 1st Feb 1938 | Box 116 \ 1 scan0100 | |
| Switch to a new alloy, AC.8, for producing A.E.C. bearings due to issues with AC.6. | 11th Feb 1938 | Box 116 \ 1 scan0101 | |
| Letter from The Associated Equipment Co Ltd following up on a delayed order for A.C.7 alloy castings for bearings. | 15th Feb 1938 | Box 116 \ 1 scan0102 | |
| Letter to The Associated Equipment Co.Ltd. regarding tests on an improved alloy for main bearings. | 21th Feb 1938 | Box 116 \ 1 scan0103 | |
| Letter from The Associated Equipment Co Ltd regarding experiments on a new alloy for main bearings. | 23th Feb 1938 | Box 116 \ 1 scan0104 | |
| Letter to The Associated Equipment Co. Ltd. regarding the supply and despatch of bearings and castings. | 25th Feb 1938 | Box 116 \ 1 scan0105 | |
| Letter to The Associated Equipment Co. Ltd. about despatching two sets of main bearing blanks made from a new alloy, AC.9. | 3rd Mar 1938 | Box 116 \ 1 scan0106 | |
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