| Description | Date | Identifier | |
| Letter from Vandervell Products Ltd. regarding a revised blueprint for Rocker Bush Part No. EB.4309 and sent samples. | 21th Apr 1939 | Box 115 \ 2 scan0469 | |
| Letter to Vandervell Products Ltd. enclosing a revised blueprint for a Rocker Bush and requesting the destruction of the old drawing. | 20th Apr 1939 | Box 115 \ 2 scan0470 | |
| Letter from Vandervell Products Limited regarding the dispatch of samples for Rocker Bush Part No. EB.4309. | 19th Apr 1939 | Box 115 \ 2 scan0471 | |
| Orders for piston rings, main bearings, and filters from various suppliers. | 11th May 1939 | Box 115 \ 2 scan0472 | |
| Letter to G.A. Vandervell of Vandervell Products Ltd. regarding rejected bushes and engine testing. | 13th May 1939 | Box 115 \ 2 scan0473 | |
| Letter to Vandervell Products Ltd. regarding the performance of 'Clevite 10' little end bushes in experimental engines. | 25th May 1939 | Box 115 \ 2 scan0474 | |
| Letter from supplier Vandervell Products Ltd. regarding Clevite 10 Small End Bushes for experimental engines. | 26th May 1939 | Box 115 \ 2 scan0475 | |
| Investigations and future fitting procedures for Little End Bushes (Vandervell type). | 9th Jun 1939 | Box 115 \ 2 scan0476 | |
| Modifications to engine bushes and rods, including material changes and design alterations. | 9th Jun 1939 | Box 115 \ 2 scan0477 | |
| Urgent internal memo requesting the immediate order of main bearings from Vandervell Products Ltd. | 14th Jun 1939 | Box 115 \ 2 scan0478 | |
| Letter to Vandervell Products regarding issues with rocker bushes and the failure of experimental three-layer big end bearings. | 24th Jun 1939 | Box 115 \ 2 scan0479 | |
| Letter to Vandervell Products Ltd. urging the completion and delivery of an order for main bearings. | 24th Jun 1939 | Box 115 \ 2 scan0480 | |
| Telegram confirming the dispatch of lower bearings in response to a previous letter. | 27th Jun 1939 | Box 115 \ 2 scan0481 | |
| Letter from Vandervell Products Ltd. concerning the supply and performance of bearings and bushes. | 28th Jun 1939 | Box 115 \ 2 scan0482 | |
| Letter from Vandervell Products Ltd. enclosing a blueprint for a Rocker Bush Part. | 30th Jun 1939 | Box 115 \ 2 scan0483 | |
| Complaint regarding the bore size of Vandervell rocker bushes for the B.V. and Wraith III models. | 30th Jun 1939 | Box 115 \ 2 scan0484 | |
| Letter to Vandervell Products Ltd. discussing specifications and dimensions for sample rocker bushes. | 3rd Jul 1939 | Box 115 \ 2 scan0485 | |
| Official order for Bentley V bonnet fasteners from Messrs. Amal Ltd. | 4th Jul 1939 | Box 115 \ 2 scan0486 | |
| Invitation letter from Vandervell Products Ltd. to an informal gathering. | 11th Jul 1939 | Box 115 \ 2 scan0487 | |
| Letter to G.A. Vandervell confirming attendance at a meeting at the Queens Hotel and a change of travel plans. | 12th Jul 1939 | Box 115 \ 2 scan0488 | |
| Letter to Vandervell Products Ltd. regarding the approval and new bore dimensions for Rocker Bush samples. | 18th Jul 1939 | Box 115 \ 2 scan0489 | |
| Letter to G.A. Vandervell discussing the performance of three-layer and aluminium tin bearings. | 20th Jul 1939 | Box 115 \ 2 scan0490 | |
| Letter from Vandervell Products Ltd. regarding engine bearing performance and development. | 22th Jul 1939 | Box 115 \ 2 scan0491 | |
| Continuation of a letter from Vandervell Products Ltd to W.A. Robotham Esq. | 22th Jul 1939 | Box 115 \ 2 scan0492 | |
| Letter to Vandervell Products Ltd. inquiring about the delivery status of three-layer big end bearings. | 24th Jul 1939 | Box 115 \ 2 scan0493 | |
| Post Office Telegram regarding the posting of 3 layer bearings. | 20th Dec 1936 | Box 115 \ 2 scan0494 | |
| Letter from Vandervell Products Ltd. regarding the dispatch of 3-layer Big End Bearings. | 25th Jul 1939 | Box 115 \ 2 scan0495 | |
| Internal order request for main bearings and thrust washers from Vandervell Products Ltd. | 22th Aug 1939 | Box 115 \ 2 scan0496 | |
| The calculation of bearing loads for a 3 bearing, 4 throw crankshaft in a 4-cylinder engine. | 26th Oct 1939 | Box 115 \ 2 scan0497 | |
| Technical analysis of engine bearing loads and P.V. factors, comparing different balance configurations and a Bentley V engine. | 26th Oct 1939 | Box 115 \ 2 scan0498 | |
| Page of engine data, including bore, stroke, weights, and bearing dimensions. | 26th Oct 1939 | Box 115 \ 2 scan0499 | |
| Data sheet detailing performance calculations and comparisons for engine main bearings. | 26th Oct 1939 | Box 115 \ 2 scan0500 | |
| Comparison of maximum pressures on Big End Bearings for a 12 HP engine and a Bentley V engine. | 26th Oct 1939 | Box 115 \ 2 scan0501 | |
| Loading diagram for the outer main bearing of a 12 HP 4-cylinder engine, detailing gas pressure and inertia at 4500 RPM. | 26th Oct 1939 | Box 115 \ 2 scan0502 | |
| Centre main bearing loading diagram for a 12HP 4-cylinder engine, showing gas pressure and inertia at 4500 RPM. | 26th Oct 1939 | Box 115 \ 2 scan0503 | |
| Blueprint showing crank pin loading diagrams comparing a 4 1/4 Bentley and a 12 HP 4-cylinder engine. | 6th Nov 1939 | Box 115 \ 2 scan0504 | |
| Letter to Vandervell Products Ltd. regarding mislaid drawings for three-layer bearings for Aero work. | 6th Nov 1939 | Box 115 \ 2 scan0505 | |
| The main bearing loading for a flat 12-cylinder engine. | 16th Nov 1939 | Box 115 \ 2 scan0506 | |
| Comparison of centre bearing loads and performance factors for flat, V-type, and Phantom III engines. | 16th Nov 1939 | Box 115 \ 2 scan0507 | |
| Specification sheet detailing engine data, including firing order, dimensions, and component weights. | 16th Nov 1939 | Box 115 \ 2 scan0508 | |
| Appendix comparing the 'orthodox' and 'Bower' methods for calculating loading on crankshaft bearings. | 16th Nov 1939 | Box 115 \ 2 scan0509 | |
| Comparison of centre journal loads for a Flat 12 cylinder engine and a 60° V 12 cylinder engine. | 16th Nov 1939 | Box 115 \ 2 scan0510 | |
| Polar plot diagram showing the load on the centre journal 'D' of a flat 12-cylinder engine at 3500 RPM. | 16th Nov 1939 | Box 115 \ 2 scan0511 | |
| Polar plot diagram of the load on intermediate journals for a flat 12-cylinder engine at 3500 RPM. | 16th Nov 1939 | Box 115 \ 2 scan0512 | |
| Polar plot diagram showing load magnitude and direction on the end journals of a flat 12-cylinder engine at 3500 RPM. | 16th Nov 1939 | Box 115 \ 2 scan0513 | |
| Polar diagram showing the load on the end journals of a flat 12-cylinder engine at 3500 R.P.M. | 16th Nov 1939 | Box 115 \ 2 scan0514 | |
| Diagram showing the load on end journals for a flat 12-cylinder engine at 3500 RPM. | 18th Nov 1939 | Box 115 \ 2 scan0515 | |
| Order be sent to Vandervell Products Ltd. for half bearings. | 18th Nov 1939 | Box 115 \ 2 scan0516 | |
| Letter to Vandervell Products Ltd. requesting the supply of big end bearings in Trimetal. | 18th Nov 1939 | Box 115 \ 2 scan0517 | |
| Letter to Vandervell Products Ltd. querying the need for special thrust washers for the B.50 engine. | 30th Nov 1939 | Box 115 \ 2 scan0518 | |
| Requesting a quotation for manufacturing special thrust washers and big ends on a production basis. | 7th Dec 1939 | Box 115 \ 2 scan0519 | |
| Letter to Vandervell Products Ltd. regarding tests on bearings for the Merlin engine. | 13th Dec 1939 | Box 115 \ 2 scan0520 | |
| Letter to Vandervell Products Ltd. regarding drawings for a connecting rod, bush, and tri-metal bearings. | 1st Jan 1940 | Box 115 \ 2 scan0521 | |
| Message arranging a meeting to discuss aero engine bearings. | 1st Jan 1940 | Box 115 \ 2 scan0522 | |
| Order for big end bearings and small end bushes from Vandervell Products Ltd. | 15th Jan 1940 | Box 115 \ 2 scan0523 | |
| Letter to Vandervell Products Ltd. regarding drawings, ordering bearings and bushes, and requesting delivery dates for outstanding parts. | 15th Jan 1940 | Box 115 \ 2 scan0524 | |
| Letter to a supplier clarifying part numbers for various engine bushes and bearings before placing a new order. | 16th Jan 1940 | Box 115 \ 2 scan0525 | |
| Typed letter requesting early consideration for stock-taking of available material and ordering of new parts. | 16th Jan 1940 | Box 115 \ 2 scan0526 | |
| Letter to Vandervell Products Ltd. regarding the cost of big end bearings and standardising material thickness. | 26th Jan 1940 | Box 115 \ 2 scan0527 | |
| Letter to Vandervell Products Ltd. concerning modifications to crankpin and connecting rod dimensions. | 9th Feb 1940 | Box 115 \ 2 scan0528 | |
| Letter requesting three prints of new drawings for Connecting Rods to avoid production delays. | 14th Feb 1940 | Box 115 \ 2 scan0529 | |
| Letter to Vandervell Products, Ltd. regarding the requirement for bearings to suit original crank pin dimensions. | 14th Feb 1940 | Box 115 \ 2 scan0530 | |
| Letter to Vandervell Products Ltd. regarding progress on thin-layer and three-layer bearings. | 28th Feb 1940 | Box 115 \ 2 scan0531 | |
| Wellworthy booklet on A.C.9. bearings, stating there are no technical comments to offer. | 29th Feb 1940 | Box 115 \ 2 scan0532 | |
| Letter to Vandervell Products Ltd. requesting a delivery date for big-end bearings needed for a test programme. | 29th Feb 1940 | Box 115 \ 2 scan0533 | |
| Request for an update on bearing development and for a report on the standardised Merlin engine bearing. | 29th Feb 1940 | Box 115 \ 2 scan0534 | |
| Cover note for notes on bearings left by Rod Banks. | 29th Feb 1940 | Box 115 \ 2 scan0535 | |
| Extract from a letter to Mr. Rod Banks detailing the process and benefits of lead-plating copper bearings. | 14th Dec 1939 | Box 115 \ 2 scan0536 | |
| Procedure for lead plating, detailing the chemical composition and process parameters. | 14th Dec 1939 | Box 115 \ 2 scan0537 | |
| Procedure for the preparation and application of an indium plating solution for bearings. | 14th Dec 1939 | Box 115 \ 2 scan0538 | |
| Description of the indium plating and baking process for bearings. | 4th Mar 1940 | Box 115 \ 2 scan0539 | |
| Letter from Vandervell Products Ltd. regarding the production and dispatch timeline for Big End Bearings. | 4th Mar 1940 | Box 115 \ 2 scan0540 | |
| Letter to Vandervell Products Ltd. regarding requirements for bearings for further development work. | 16th Mar 1940 | Box 115 \ 2 scan0541 | |
| List of Vandervell bearings with corresponding quantities and drawing numbers. | 20th Mar 1940 | Box 115 \ 2 scan0542 | |
| Letter from Vandervell Products Ltd. acknowledging receipt of an enquiry for bearings. | 20th Mar 1940 | Box 115 \ 2 scan0543 | |
| Request to issue a covering order to Vandervell Products Ltd for a list of bearings and bushes. | 28th Sep 1940 | Box 115 \ 2 scan0544 | |
| Publication on Fafnir Mechani-Seal bearings and their potential advantages for chassis use. | 29th Mar 1940 | Box 115 \ 2 scan0545 | |
| 'Fafnir Mechani-Seal Bearings' and an attached description from 'The Dragon' publication. | 15th Mar 1940 | Box 115 \ 2 scan0546 | |
| Front and back cover of 'The Dragon', a Fafnir publication about ball bearings. | 1st Nov 1939 | Box 115 \ 2 scan0547 | |
| Promotional brochure for Fafnir Ball Bearings, detailing their product line, applications, and US sales and distribution network. | 1st Nov 1939 | Box 115 \ 2 scan0548 | |
| Two pages from 'The Dragon' magazine by Fafnir Bearings, detailing contents for the November issue and an article on bearing applications. | 1st Nov 1939 | Box 115 \ 2 scan0549 | |
| Feature on a Fafnir-Cleveland spindle mounting using Super-Precision Fafnir Duplex Ball Bearings in a Cleveland Single Spindle Automatic machine. | 1st Nov 1940 | Box 115 \ 2 scan0550 | |
| Two-page spread from 'The Dragon', a publication by The Fafnir Bearing Company, detailing the use and benefits of their ball bearings in machinery. | 1st Nov 1940 | Box 115 \ 2 scan0551 | |
| Article from 'The Dragon' publication describing the spindle mounting of the Cleveland Single Spindle Automatic machine tool. | 1st Nov 1940 | Box 115 \ 2 scan0552 | |
| Instructions for mounting standard radial type ball bearings. | 1st Nov 1940 | Box 115 \ 2 scan0553 | |
| Page from the 'Dragonettes' publication featuring articles on ball bearing retainers and Romanian culture. | 1st Nov 1940 | Box 115 \ 2 scan0554 | |
| Article from 'The Dragon' publication on an Air Draw Furnace using Fafnir Cylindrical Cartridges in a recirculating tempering unit. | 1st Nov 1940 | Box 115 \ 2 scan0555 | |
| Article announcing the development of the Fafnir New Mechanical Seal for bearings, with a related piece on its application in a furnace. | 1st Nov 1940 | Box 115 \ 2 scan0556 | |
| Article detailing the use of Fafnir bearings in the Rolloplane and Octopus amusement park rides. | 6th Apr 1940 | Box 115 \ 2 scan0557 | |
| Letter to Vandervell Products Ltd. inquiring about producing flange bearings similar to American samples. | 6th Apr 1940 | Box 115 \ 2 scan0558 | |
| Letter from Vandervell Products Ltd. discussing the use of washers in preference to flanged bearings. | 10th Apr 1940 | Box 115 \ 2 scan0559 | |
| Letter from C.A. Vandervell regarding developments in America about tool charges. | 15th Apr 1940 | Box 115 \ 2 scan0560 | |
| Letter to Vandervell Products Ltd discussing washers and flange bearings. | 15th Apr 1940 | Box 115 \ 2 scan0561 | |
| Notes from a visit to Cadillac on April 16, 1940, comparing designs for shutters, radiator caps, and Morse chains. | 25th Apr 1940 | Box 115 \ 2 scan0562 | |
| Technical report on American car engine components and balancing techniques. | 25th Apr 1940 | Box 115 \ 2 scan0563 | |
| Engine bore wear, comparing oil consumption data for standard and porous castings over mileage. | 25th Apr 1940 | Box 115 \ 2 scan0564 | |
| Engine component materials and design, with notes on Cadillac and Ford practices. | 25th Apr 1940 | Box 115 \ 2 scan0565 | |
| Technical note on Cadillac and Buick bearing materials and ignition spark plugs. | 25th Apr 1940 | Box 115 \ 2 scan0566 | |
| Ignition troubles, comparing A.C. spark plug insulator materials and discussing developments for Cadillac and Chevrolet. | 25th Apr 1940 | Box 115 \ 2 scan0567 | |
| Letter from a supplier confirming the dispatch of bushes and providing an update on an outstanding order. | 1st May 1940 | Box 115 \ 2 scan0568 | |
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