| Description | Date | Identifier | |
| Follow-up memo regarding an invoice for bearings and bushes received from Messrs. Vandervell. | 18th Jun 1940 | Box 115 \ 2 scan0569 | |
| Listing outstanding chassis engine bearings from Vandervell Products Ltd. | 18th Jun 1940 | Box 115 \ 2 scan0570 | |
| Payment approval for an invoice for Big End Bearings, Small End Bushes and tooling costs. | 5th Jul 1940 | Box 115 \ 2 scan0571 | |
| Short typed message to Johnson regarding a visit to Derby. | 8th Jul 1940 | Box 115 \ 2 scan0572 | |
| Investigation into the Merlin main pressure lubrication system, including bearing material development and comparisons with Bentley systems. | 22th Jul 1940 | Box 115 \ 2 scan0573 | |
| Comparison of engine bearing and lubrication schemes for the Kestrel, Merlin, and Bentley models. | 22th Jul 1940 | Box 115 \ 2 scan0574 | |
| Comparison of Merlin and Bentley engine lubrication systems, bearing data, and failure rates. | 22th Jul 1940 | Box 115 \ 2 scan0575 | |
| Analysis of big-end and main bearing failures, considering factors like oil flow, aeration, bearing types, and engine test conditions. | 22th Jul 1940 | Box 115 \ 2 scan0576 | |
| Bearing lubrication, proposing an improved position for the oil feed hole to optimize performance under load. | 22th Jul 1940 | Box 115 \ 2 scan0577 | |
| The development and testing of various main bearing alloys, focusing on anti-seizing and fatigue properties. | 19th Jun 1940 | Box 115 \ 2 scan0578 | |
| Test results for various engine bearing designs, alloys, and lubrication schemes. | 19th Jun 1940 | Box 115 \ 2 scan0579 | |
| Proposed future programme for testing the anti-seizing properties of various alloys, bearings and lubrication schemes. | 19th Jun 1940 | Box 115 \ 2 scan0580 | |
| Statistical report on Merlin IV and X engines returned for service, detailing damage causes and failure types for March-May 1940. | 1st Jun 1940 | Box 115 \ 2 scan0581 | |
| Summary report on faults, leaks, and bearing failures for Merlin III and X engines returned from service. | 31th May 1940 | Box 115 \ 2 scan0582 | |
| History of lubrication and modifications for the Kestrel and Merlin engines' main pressure systems. | 10th Jul 1941 | Box 115 \ 2 scan0583 | |
| History of modifications to Bentley bearings and their lubrication. | 7th Aug 1937 | Box 115 \ 2 scan0584 | |
| Causes and proposed solutions for big end failures in the Merlin engine. | 23th Jul 1940 | Box 115 \ 2 scan0585 | |
| The development of lubrication systems, comparing Kestrel and Merlin engine modifications. | 23th Jul 1940 | Box 115 \ 2 scan0586 | |
| Mechanical testing report on Vandervell and other specified bearings for the Merlin engine. | 24th Jul 1940 | Box 115 \ 2 scan0587 | |
| Vandervell bearing tests, detailing cracking issues and recommendations for the Merlin crankcase. | 24th Jul 1940 | Box 115 \ 2 scan0588 | |
| Pricing discrepancies on orders for Vandervell bearings. | 24th Jul 1940 | Box 115 \ 2 scan0589 | |
| Letter to Messrs. Delco-Remy Hyatt requesting three copies of 'New Departure Bearing Handbooks' Vol. I & II. | 19th Aug 1940 | Box 115 \ 2 scan0590 | |
| Letter to Hoffmann Manufacturing Co. regarding the supply and delivery of bearings. | 5th Sep 1940 | Box 115 \ 2 scan0591 | |
| Cover note for reports from Ransome & Marles on tests of Bentley II axle pinion bearing preload and cage failures. | 5th Sep 1938 | Box 115 \ 2 scan0592 | |
| Test report on Bentley rear axle pinion bearings to investigate the effects of tilted outer cages. | 5th Sep 1938 | Box 115 \ 2 scan0593 | |
| Results of multiple bearing and cage tests, numbered 8 to 13, and conclusions drawn. | 14th Dec 1937 | Box 115 \ 2 scan0594 | |
| Test report on the alteration in fit, wear on tracks, and reduction in ball diameter of a bearing. | 14th Dec 1937 | Box 115 \ 2 scan0595 | |
| Letter to Messrs. Ransome & Marles Bearing Co. regarding the future supply of clutch thrust bearings. | 20th Sep 1940 | Box 115 \ 2 scan0596 | |
| Requirements for fitting connecting rods and caps for experimental cars. | 10th Oct 1940 | Box 115 \ 2 scan0597 | |
| Letter to Vandervell Products Ltd. querying tool charges and costs for main bearings on order 17746. | 8th Oct 1940 | Box 115 \ 2 scan0598 | |
| Blueprints for proposed tri-metal bushes for a Layshaft, to be sent to Vandervell Ltd. | 3rd Oct 1940 | Box 115 \ 2 scan0599 | |
| Design proposal for tri-metal bushes for a Layshaft on a Bentley I. | 3rd Oct 1940 | Box 115 \ 2 scan0600 | |
| Inquiry to Vandervell Products Ltd. regarding the supply of trial tri-metal bushes for a car gearbox. | 7th Oct 1940 | Box 115 \ 2 scan0601 | |
| Advice note from Ransome & Marles Bearing Co. Ltd. for the consignment of rollers. | 2nd Oct 1940 | Box 115 \ 2 scan0602 | |
| Advice note from Ransome & Marles Bearing Co. Ltd. regarding a sample bearing. | 7th Oct 1940 | Box 115 \ 2 scan0603 | |
| Running experience with Vandervell strip main bearings in various engines with aluminium crankcases. | 16th Oct 1940 | Box 115 \ 2 scan0604 | |
| The running experience of Vandervell strip main bearings fitted in aluminium crankcases. | 16th Oct 1940 | Box 115 \ 2 scan0605 | |
| Layshaft bearing lubrication, suggesting a modification to the second motion shaft is unnecessary. | 21th Oct 1940 | Box 115 \ 2 scan0606 | |
| Agreement to delete a .094 diameter hole drilled in the second motion shaft. | 26th Oct 1940 | Box 115 \ 2 scan0607 | |
| Summary of the allocation and fitting of American ball bearings to various Merlin engines for development tests. | 20th Nov 1940 | Box 115 \ 2 scan0608 | |
| Status report on various Merlin engine tests and the progress of fitting American-made bearings. | 22th Nov 1940 | Box 115 \ 2 scan0609 | |
| Suggesting a trial of a cageless clutch thrust bearing to investigate a noise issue. | 22th Nov 1940 | Box 115 \ 2 scan0610 | |
| Letter from a bearing supplier discussing design alternatives for a clutch throwout bearing and potential noise issues. | 20th Nov 1940 | Box 115 \ 2 scan0611 | |
| Selection and testing of materials for engine big end bearings. | 26th Nov 1940 | Box 115 \ 2 scan0612 | |
| Letter from a bearing supplier regarding a modified full-type bearing sample and its expected noise. | 9th Dec 1940 | Box 115 \ 2 scan0613 | |
| Suggesting a road test for a new clutch thrust bearing from Ransome & Marles to resolve a noise issue. | 11th Dec 1940 | Box 115 \ 2 scan0614 | |
| Testing ball bearings with altered cages and a simplified rear axle to address bearing life and noise issues. | 4th Jan 1941 | Box 115 \ 2 scan0615 | |
| Use of Norma Hoffmann S.7 and US.7 self-aligning ball bearings for Merlin engines. | 2nd Jan 1941 | Box 115 \ 2 scan0616 | |
| Letter to Howard Graham, Ltd. concerning modifications and sketches for two Harris bearing applications, detailing loads and angular movements. | 5th Feb 1941 | Box 115 \ 2 scan0617 | |
| Letter from Vandervell Products Ltd. to W.A. Robotham regarding a future meeting to discuss developments. | 5th Dec 1940 | Box 115 \ 2 scan0618 | |
| Sending a photograph and blueprint of a Junkers Crankshaft de-aerator and returning General Motors folders. | 4th Mar 1941 | Box 115 \ 2 scan0619 | |
| Cross-section drawing of the bleeding system for a Junkers Jumo 211A engine crankshaft. | 8th Mar 1941 | Box 115 \ 2 scan0620 | |
| Photograph showing the disassembled components of a Junkers engine crankshaft oil-bleeder. | 28th Jun 1941 | Box 115 \ 2 scan0621 | |
| Invoice from Vandervell Products Ltd for Outer Rod Bearings. | 28th Jun 1941 | Box 115 \ 2 scan0622 | |
| Query to Vandervell Products Ltd. about an invoice for outer rod bearings that cannot be traced. | 7th Jul 1941 | Box 115 \ 2 scan0623 | |
| Letter from Rotol Airscrews requesting a recommendation for a supplier of babbitted lead-bronze steel-backed bearing shells. | 2nd Aug 1941 | Box 115 \ 2 scan0624 | |
| Letter to Rotol Airscrews Ltd. discussing the use of tri-metal versus straight babbitt bearings for engines. | 5th Aug 1941 | Box 115 \ 2 scan0625 | |
| Letter to The Hoffmann Engineering Co., Ltd. requesting the purchase of roller and ball bearings for a Tank Priority order. | 18th Aug 1941 | Box 115 \ 2 scan0626 | |
| Letter to The Hoffmann Engineering Co. Ltd. cancelling an unofficial order for bearings. | 22th Aug 1941 | Box 115 \ 2 scan0627 | |
| Letter to Ransome & Marles Brg. Co. Ltd. requesting dimensions for a single row roller journal bearing, LRJ.12. | 9th Sep 1941 | Box 115 \ 2 scan0628 | |
| Letter from Ransome & Marles Bearing Company regarding the supply and design of clutch bearings. | 6th Oct 1940 | Box 115 \ 2 scan0629 | |
| Letter concerning a modification to clutch fingers to address excessive spinning of an outer ring. | 17th Oct 1941 | Box 115 \ 2 scan0630 | |
| Payment authorization for a set of Clevite connecting rod bearings and a V.P.2 part. | 17th Oct 1941 | Box 115 \ 2 scan0631 | |
| Post-war strategy for bearing suppliers to improve pricing through competition. | 21th Dec 1943 | Box 115 \ 2 scan0632 | |
| Letter from Vandervell Products Ltd. confirming chassis number 57.KU and arranging for work to be completed before the body is fitted. | 2nd Jul 1937 | Box 115 \ 3 scan0001 | |
| Alterations to the big end bearings for the Wraith and 4 1/4 Litre Bentley models. | 3rd Jul 1937 | Box 115 \ 3 scan0002 | |
| Letter discussing inconsistent oil consumption results, Le Mans performance, bearing repairs and fitting a new chassis. | 5th Jul 1937 | Box 115 \ 3 scan0003 | |
| Epidemic of big-end bearing failures on Bentley cars and proposing solutions. | 5th Jul 1937 | Box 115 \ 3 scan0004 | |
| Epidemic of connecting rod bearing failures in 3 1/2-Litre Bentley cars and the associated repair costs. | 7th Jul 1937 | Box 115 \ 3 scan0005 | |
| Suggestions for dealing with issues on 3½-litre vehicles, including engine failures and long-term running. | 7th Jul 1937 | Box 115 \ 3 scan0006 | |
| Analysis of issues and recommended modifications for the 4¼-litre Bentley, including costs. | 7th Jul 1937 | Box 115 \ 3 scan0007 | |
| Recommendations for engine repairs concerning big end and main bearing failures, and second-hand car certification. | 7th Jul 1937 | Box 115 \ 3 scan0008 | |
| Proposed depot sheet detailing main bearing replacement and crankshaft lubrication modifications for the 4 1/4 Litre Bentley. | 6th Jul 1937 | Box 115 \ 3 scan0009 | |
| Procedures for addressing different types of big end failure in engines. | 3rd Jul 1937 | Box 115 \ 3 scan0010 | |
| Engine big end bearing failures in 3½ and 4¼ Litre Bentley cars, listing failures, mileage, and remarks. | 3rd Jul 1937 | Box 115 \ 3 scan0011 | |
| Main bearing and big end failures in 3 1/2 litre and 4 1/4 litre cars. | 3rd Jul 1937 | Box 115 \ 3 scan0012 | |
| Main bearing sinkage issues and estimated repair costs for the 4 1/4 Litre model. | 3rd Jul 1937 | Box 115 \ 3 scan0013 | |
| The condition of engine bearings for car B.8.G.A. following the Paris trials. | 6th Jul 1937 | Box 115 \ 3 scan0014 | |
| Standardisation report for Bentley main bearings to address hammering out and engine roughness. | 25th Jun 1937 | Box 115 \ 3 scan0015 | |
| Production note confirming no extra tool cost is required to introduce a change for the 'L' Series chassis. | 10th Aug 1939 | Box 115 \ 3 scan0016 | |
| Bentley connecting rod bearing and axle shaft failures. | 8th Jul 1937 | Box 115 \ 3 scan0017 | |
| Confirming a telephone agreement regarding the cost and supply of new bearings for the 176th chassis in 'K' Series. | 9th Jul 1937 | Box 115 \ 3 scan0018 | |
| Requesting official orders for work on Wraith tappets and Phantom III & Bentley bearings. | 12th Jul 1937 | Box 115 \ 3 scan0019 | |
| Changes to the main bearings and crankshaft for the Bentley 'K' Series chassis. | 12th Jul 1937 | Box 115 \ 3 scan0020 | |
| Issues and potential modifications for Phantom III main and big end bearings. | 14th Jul 1937 | Box 115 \ 3 scan0021 | |
| Blowholes in A.C.6. connecting rod bearings for the Bentley Chassis 57-KW. | 15th Jul 1937 | Box 115 \ 3 scan0022 | |
| Invoice details from Hoyt Metal Co. for lining bushes and connecting rod bearings. | 20th Jul 1937 | Box 115 \ 3 scan0023 | |
| Failures of big end bearings on the 4 1/4-litre engine and the testing of a new, thinner Hall's alloy bearing on the Phantom III and Wraith engines. | 25th Jul 1937 | Box 115 \ 3 scan0024 | |
| Instructing a change in practice for Bentley connecting rod and main bearings to prevent loosening. | 28th Jul 1937 | Box 115 \ 3 scan0025 | |
| Requesting a covering order for bearings metalled by the Hoyt Metal Co. | 2nd Aug 1937 | Box 115 \ 3 scan0026 | |
| Letter from English Racing Automobiles (E.R.A.) regarding the manufacture of engine bearing shells. | 8th Aug 1937 | Box 115 \ 3 scan0027 | |
| Drawing of a Centre Bearing Shell for a 2000c.c. engine. | 9th Aug 1937 | Box 115 \ 3 scan0028 | |
| Letter from English Racing Automobiles Ltd. regarding the dispatch of an incorrect print, E/10146, and enclosing the correct print, E/10147. | 9th Aug 1937 | Box 115 \ 3 scan0029 | |
| Letter from English Racing Automobiles Ltd providing crankshaft and connecting rod dimensions and discussing design details. | 10th Aug 1937 | Box 115 \ 3 scan0030 | |
| Letter from the Experimental Department regarding the production and supply of connecting rod big end and centre main bearings. | 11th Aug 1937 | Box 115 \ 3 scan0031 | |
| Instructions on machining and fitting bearing shells, shims, and connecting rods. | 11th Aug 1937 | Box 115 \ 3 scan0032 | |
| Request to despatch 14 bearing shells to Mr. P. Berthon of E.R.A. Ltd. for experimental testing. | 11th Aug 1937 | Box 115 \ 3 scan0033 | |
| Letter from English Racing Automobiles Ltd. acknowledging receipt of parts and discussing procedures for finishing shells and bearings. | 13th Aug 1937 | Box 115 \ 3 scan0034 | |
| Instruction for a billet of AC.6 bearing material to be cast, along with shims, detailing dimensions and heat treatment. | 18th Aug 1937 | Box 115 \ 3 scan0035 | |
| Requesting an order number for two special bearings in Hall's metal for the E.R.A.Co. | 20th Aug 1937 | Box 115 \ 3 scan0036 | |
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