| Description | Date | Identifier | |
| Invoice from Vandervell Products Ltd. for engine bearings and seeking payment authorization. | 26th Jan 1937 | Box 115 \ 1 scan0269 | |
| Ordering three sets of Cleveland Graphite Bronze Bearings from the agent Vandervell. | 27th Jan 1937 | Box 115 \ 1 scan0270 | |
| Internal request to place an order for Bentley bearings with Vandervell Products Ltd. | 27th Jan 1937 | Box 115 \ 1 scan0271 | |
| Letter to a supplier regarding production difficulties with bearings and crankcases. | 28th Jan 1937 | Box 115 \ 1 scan0272 | |
| Letter from a supplier advising on the use of shell ring bearings and potential heat dissipation issues. | 30th Jan 1937 | Box 115 \ 1 scan0273 | |
| Report from High Duty Alloys Ltd. about a seized bearing and recommending a switch to forged material. | 1st Mar 1937 | Box 115 \ 1 scan0274 | |
| Letter from High Duty Alloys Ltd. concerning a delay and quality issues with R.R.56 bearing material. | 30th Jan 1937 | Box 115 \ 1 scan0275 | |
| Laboratory test report on the chemical and microscopic examination of a seized connecting rod bearing. | 28th Jan 1937 | Box 115 \ 1 scan0276 | |
| Letter from The Cleveland Graphite Bronze Co. to Mr. C. W. Grylls discussing the composition of tin base babbitt for bearings. | 3rd Feb 1937 | Box 115 \ 1 scan0277 | |
| Letter to Vandervell Products Ltd. discussing the fitting of thrust washers and bearing shells, specifically regarding heat conductivity and dimensions. | 3rd Feb 1937 | Box 115 \ 1 scan0278 | |
| Letter inquiring about the delivery date for special rocker shaft bushes and big end bushes. | 3rd Feb 1937 | Box 115 \ 1 scan0279 | |
| Request to despatch a set of 25/30 main bearing shells to Walker Bros. Ltd. in Wigan. | 3rd Feb 1937 | Box 115 \ 1 scan0280 | |
| Letter to supplier Walker Bros Ltd. regarding incorrectly machined shells made from NS5 Cadmium Nickel alloy. | 3rd Feb 1937 | Box 115 \ 1 scan0281 | |
| Letter from Walker Brothers (Wigan) Ltd regarding the scrapping of Cadmium Nickel Alloy lined Sheels and the lining of new shells. | 5th Feb 1937 | Box 115 \ 1 scan0282 | |
| Standardisation of parts relating to an extra hole in the crank journal and enlarged grooves in main bearings. | 19th Jan 1937 | Box 115 \ 1 scan0283 | |
| Estimate for the cost of new tools and the production start for the 'K' Series chassis. | 6th Feb 1937 | Box 115 \ 1 scan0284 | |
| Letter from Vandervell Products Ltd. regarding shells, thrust washers, and various bushes. | 6th Feb 1937 | Box 115 \ 1 scan0285 | |
| Requesting instructions for die-casting Bentley bearings and tracking the weight of the material used. | 11th Feb 1937 | Box 115 \ 1 scan0286 | |
| Preparation and amendment of a Depot Sheet for Bentley engine bearings. | 12th Feb 1937 | Box 115 \ 1 scan0287 | |
| Procedure for addressing engine bearing roughness and thumping on 3½ and 4¼ Litre Bentley Chassis. | 12th Feb 1937 | Box 115 \ 1 scan0288 | |
| Instructions for engine bearing maintenance, modifications, and specific notes for a 3½ Litre Bentley. | 12th Feb 1937 | Box 115 \ 1 scan0289 | |
| Instructions on the replacement procedure for big end and main bearings. | 13th Feb 1937 | Box 115 \ 1 scan0290 | |
| Bentley bearings, specifically not to drill an extra hole in crank journals and to fit shims on 3 1/2 litre models. | 13th Feb 1937 | Box 115 \ 1 scan0291 | |
| Production of Bentley big end bearings from R.R.56 material. | 15th Jan 1937 | Box 115 \ 1 scan0292 | |
| Material properties and silicon content of RR.56 forged bar for Bentley Connecting Rod Bearings. | 20th Feb 1937 | Box 115 \ 1 scan0293 | |
| Unsuitability of an alloy for forged bearing bars due to its low silicon content. | 22th Feb 1937 | Box 115 \ 1 scan0294 | |
| Letter to Vandervell Products Ltd. regarding the supply and specification of rocker and small end bushes. | 23th Feb 1937 | Box 115 \ 1 scan0295 | |
| Letter from Vandervell Products Ltd. confirming an alternative rocker bush from drawing No.808B is satisfactory. | 24th Feb 1937 | Box 115 \ 1 scan0296 | |
| Letter to Vandervell Products Ltd. confirming an order for rocker bushes and requesting a copy of the drawing. | 26th Feb 1937 | Box 115 \ 1 scan0297 | |
| Letter from Vandervell Products regarding the manufacture and delivery of 48 Rocker Bushes to Drawing No.808B. | 27th Feb 1937 | Box 115 \ 1 scan0298 | |
| Blueprint showing two alternative designs for a Rocker Bush. | 2nd Jul 1910 | Box 115 \ 1 scan0299 | |
| Engineering drawing of a connecting rod, cap, and associated components. | 19th Jun 1936 | Box 115 \ 1 scan0300 | |
| Engine work for Chassis B.125.GP, detailing liner stepping, bearing tightening, and connecting rod issues. | 5th Mar 1937 | Box 115 \ 1 scan0301 | |
| Letter to the Hoyt Metal Company regarding the testing of 'Satco' metalling for Bentley bearing shells and the return of a borrowed bearing jig. | 8th Mar 1937 | Box 115 \ 1 scan0302 | |
| Letter from The Hoyt Metal Company regarding the lining of Connecting Rod and Main bearings with 'Satco' and discussing 'Z3' white metal bench test results. | 10th Mar 1937 | Box 115 \ 1 scan0303 | |
| Letter to The Hoyt Metal Co. providing instructions for metalling Bentley main and connecting rod bearings. | 11th Mar 1937 | Box 115 \ 1 scan0304 | |
| The specifications and requirements for manufacturing aluminium brake drums. | 18th Mar 1937 | Box 115 \ 1 scan0305 | |
| The receipt of an experimental bearing from Guy A. Vandervell. | 22th Mar 1937 | Box 115 \ 1 scan0306 | |
| The performance of Vandervell bearings compared to standard bearings on a Bentley test bed engine. | 23th Mar 1937 | Box 115 \ 1 scan0307 | |
| Letter to Cadillac Motor Car Co. regarding the despatch and machining instructions for Aluminium Tin Bearing Alloy. | 23th Mar 1937 | Box 115 \ 1 scan0308 | |
| With instructions for producing and dispatching bearing material to Cadillac Motor Car Co. Ltd. | 23th Mar 1937 | Box 115 \ 1 scan0309 | |
| Letter to The National Smelting Co. Ltd. regarding the testing and cost of cadmium nickel alloy bearings. | 25th Mar 1937 | Box 115 \ 1 scan0310 | |
| Production of Cadmium-Nickel bearings using a metal spraying process. | 31th Mar 1937 | Box 115 \ 1 scan0311 | |
| Letter to Vandervell Products Ltd. regarding the failure of their bearings during a test in a Bentley Unit. | 6th Apr 1937 | Box 115 \ 1 scan0312 | |
| Letter regarding the supply and cost of NS.5 cadmium nickel alloy for test engine bearings. | 5th Apr 1937 | Box 115 \ 1 scan0313 | |
| Big end bearing failure for a 35-EX Phantom III. | 9th Apr 1937 | Box 115 \ 1 scan0314 | |
| Changing the material for Wraith engine connecting rod bearings from R.R.56 to a new A/T aluminium tin alloy. | 9th Apr 1937 | Box 115 \ 1 scan0315 | |
| The fitting of a Bentley engine with Avonmouth Cadmium nickel bearings. | 12th Apr 1937 | Box 115 \ 1 scan0316 | |
| Letter from Vandervell Products Ltd. regarding unsatisfactory bearing test results and requesting a meeting. | 12th Apr 1937 | Box 115 \ 1 scan0317 | |
| Instruction to produce dies for die-cast Hall alloy bearings for the Wraith III. | 15th Apr 1937 | Box 115 \ 1 scan0318 | |
| Bearing tests carried out on the bearing test rig. | 20th Apr 1937 | Box 115 \ 1 scan0319 | |
| Bearing endurance tests conducted on a single-cylinder test rig. | 23th Apr 1937 | Box 115 \ 1 scan0320 | |
| Report page detailing the failure load and time run for different bearing materials. | 23th Apr 1937 | Box 115 \ 1 scan0321 | |
| Failure analysis report on an Allison BZ/L bearing material. | 23th Apr 1937 | Box 115 \ 1 scan0322 | |
| Test report on Bearing Material A.G.2, detailing its composition, clearance, and failure analysis. | 23th Apr 1937 | Box 115 \ 1 scan0323 | |
| The composition and failure analysis of bearing material A.G.S.B. | 23th Apr 1937 | Box 115 \ 1 scan0324 | |
| Test report on A.C.6.S. bearing material, detailing its composition and performance under load. | 23th Apr 1937 | Box 115 \ 1 scan0325 | |
| Two bearing failures during testing, including total running times. | 23th Apr 1937 | Box 115 \ 1 scan0326 | |
| Photograph showing the two halves of a worn A.C.2 bearing. | 23th Apr 1937 | Box 115 \ 1 scan0327 | |
| Photograph of a V.C.M. sleeve run with an A.C.2. bearing, showing wear marks. | 23th Apr 1937 | Box 115 \ 1 scan0328 | |
| Photograph showing an A.C.5s bearing and a V.C.M. sleeve, displaying signs of wear. | 23th Apr 1937 | Box 115 \ 1 scan0329 | |
| Photograph of an A.C.6s. bearing and a V.C.M. sleeve, with the bearing showing visible cracks. | 23th Apr 1937 | Box 115 \ 1 scan0330 | |
| Photograph showing two halves of a standard Kestrel centre main BZ/L bearing. | 11th May 1937 | Box 115 \ 1 scan0331 | |
| Bentley car with 25,248 miles towed in due to a failed No.5 connecting rod bearing. | 11th May 1937 | Box 115 \ 1 scan0332 | |
| Big end loadings for the Ph.III engine. | 15th May 1937 | Box 115 \ 1 scan0333 | |
| Request to obtain and despatch two sets of big end bearing shells to Walker Bros. Ltd. for metalling. | 19th May 1937 | Box 115 \ 1 scan0334 | |
| Letter to Messrs Walker Bros Ltd. regarding a batch of bearing shells, metalling, and a query about corrosion. | 19th May 1937 | Box 115 \ 1 scan0335 | |
| Cover memo regarding an attached document (Rm.377) showing Phantom III main bearing loadings. | 21th May 1937 | Box 115 \ 1 scan0336 | |
| Letter from The Cleveland Graphite Bronze Co. to W.A. Robotham acknowledging a previous letter and advising of an upcoming visit. | 21th May 1937 | Box 115 \ 1 scan0337 | |
| Cover note for an attached document (Rm.377) showing the Phantom III main bearing loadings. | 21th May 1937 | Box 115 \ 1 scan0338 | |
| Follow-up letter to The Hoyt Metal Co. regarding an overdue order for bearing shells and the return of a loaned jig. | 24th May 1937 | Box 115 \ 1 scan0339 | |
| Letter to Walker Bros Ltd. regarding the metalling of N.S.5 bearing shells and associated corrosion tests. | 26th May 1937 | Box 115 \ 1 scan0340 | |
| Letter from The Hoyt Metal Company regarding a delay in dispatching Connecting Rod Bearings. | 26th May 1937 | Box 115 \ 1 scan0341 | |
| Performance and material properties of main bearing alloys used in Bentley engines to address hammering out issues. | 29th May 1937 | Box 115 \ 1 scan0342 | |
| Bearing loads and failures, comparing them to American practice and detailing improvements for Bentley and Phantom III models. | 4th Jun 1937 | Box 115 \ 1 scan0343 | |
| Reversion to babbitt main bearings and future engine development possibilities like supercharging. | 4th Jun 1937 | Box 115 \ 1 scan0344 | |
| Comparative analysis of engine bearings for Phantom III, Wraith, and Bentley models. | 4th Jun 1937 | Box 115 \ 1 scan0345 | |
| Blueprint detailing increased bearing areas for a Phase III component, with a dimensional data table and diagram. | 4th Jun 1937 | Box 115 \ 1 scan0346 | |
| Polar diagram of crankshaft inertia loadings at 4500 RPM for Crank Arrangement LeC.5433. | 24th Mar 1937 | Box 115 \ 1 scan0347 | |
| Blueprint showing a polar plot of big end loadings for a 4¼ Litre Bentley engine. | 24th Mar 1937 | Box 115 \ 1 scan0348 | |
| Polar diagram illustrating the inertia loadings on the PH.III main bearings at 4500 RPM. | 23th Apr 1937 | Box 115 \ 1 scan0349 | |
| Polar plot diagram showing the inertia loadings on a big end bearing at 4500 RPM. | 23th Apr 1937 | Box 115 \ 1 scan0350 | |
| Comparison of bearing loadings between the Wraith III and Bentley models, noting changes in journal and big end loads. | 10th Jun 1937 | Box 115 \ 1 scan0351 | |
| Requesting the production of a set of Bentley main bearings for a trials car. | 10th Jun 1937 | Box 115 \ 1 scan0352 | |
| Letter to The Hoyt Metal Co. requesting information on 'Satco' lined bearings for testing. | 11th Jun 1937 | Box 115 \ 1 scan0353 | |
| Letter to Walker Bros Ltd. regarding the dispatch and return of a borrowed bearing jig. | 11th Jun 1937 | Box 115 \ 1 scan0354 | |
| Letter from the Experimental Department to The National Smelting Co. discussing the results of testing N.S.5. bearings. | 12th Jun 1937 | Box 115 \ 1 scan0355 | |
| Letter concerning the metalling of connecting rod shells and the resulting communication between three separate firms. | 12th Jun 1931 | Box 115 \ 1 scan0356 | |
| Letter to The Magnolia Anti Friction Metal Co. regarding a jig for metalling cadmium nickel bearing shells. | 12th Jun 1937 | Box 115 \ 1 scan0357 | |
| Letter to The Hoyt Metal Co. Ltd. comparing the cost and performance of their Z.3 whitemetal against the standard. | 14th Jun 1937 | Box 115 \ 1 scan0358 | |
| Letter from Vandervell Products Ltd. regarding the dispatch of 10 further samples of bearings following a previous non-receipt. | 21th Jun 1937 | Box 115 \ 1 scan0359 | |
| Follow-up letter to Walker Bros Ltd. regarding the urgent return of a bearing jig. | 23th Jun 1937 | Box 115 \ 1 scan0360 | |
| Use, testing, and cost-effectiveness of aluminium tin alloy bearings. | 24th Jun 1937 | Box 115 \ 1 scan0361 | |
| Use and development of an aluminium tin alloy for engine bearings, mentioning trials on a Ford big end. | 24th Jun 1937 | Box 115 \ 1 scan0362 | |
| Letter from Walker Brothers (Wigan) Ltd. confirming the return of a Jig and bearings, with an internal routing note. | 24th Jun 1937 | Box 115 \ 1 scan0363 | |
| Letter to Capt. S.B. Wilks of The Rover Company discussing various recent engineering developments and inviting him for a visit. | 24th Jun 1937 | Box 115 \ 1 scan0364 | |
| Page 2 of a letter to Capt. S.B. Wilks regarding a car's poor performance after decarbonisation. | 24th Jun 1937 | Box 115 \ 1 scan0365 | |
| Licensing and trial of Aluminium Tin Alloy Bearings. | 28th Jun 1937 | Box 115 \ 1 scan0366 | |
| Letter to Walker Bros Ltd. acknowledging receipt of a bearing jig and bearings, and seeking clarification on the official order. | 28th Jun 1937 | Box 115 \ 1 scan0367 | |
| Standardisation document for R.R.56 Main Bearing Shims on the Phantom III. | 29th May 1937 | Box 115 \ 1 scan0368 | |
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