Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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Two alternative suggestions for modifying the pinion nose bearing housing on a semi-floating rear axle to facilitate production.5th Sep 1938Box 111 \ 4  scan0059
Telegram received by telephone from Rochester, New York, regarding material SAE 4620 and the inspection of scored gears.10th Sep 1938Box 111 \ 4  scan0060
Telegram received by telephone regarding the inspection of scored gears and a request for assembly prints.10th Sep 1938Box 111 \ 4  scan0061
Letter from Gleason Works regarding scored hypoid gears and their material specifications.9th Sep 1938Box 111 \ 4  scan0062
Letter from Gleason Works concerning scored gears and an experimental axle deflection test.9th Sep 1938Box 111 \ 4  scan0063
Cablegram regarding SAE 4620 material and a request to return scored gears for inspection.10th Sep 1938Box 111 \ 4  scan0064
Letter to The Gleason Works discussing rear axle gear scoring during testing.12th Sep 1938Box 111 \ 4  scan0065
The return of a pair of failed rear axle gears to The Gleason Works in Rochester, N.Y., U.S.A.12th Sep 1938Box 111 \ 4  scan0066
Letter from a supplier (Gleason Works) regarding excessive tooth loads on hypoid gears and recommendations for design changes.24th Sep 1938Box 111 \ 4  scan0067
Cablegram from Gleason reporting excessive tooth loads and non-rigid mountings, requesting an axle for a deflection test.26th Sep 1938Box 111 \ 4  scan0068
Night letter cablegram to Gleasons in Rochester, NY, querying the successful dynamometer testing of an existing ring gear.29th Sep 1938Box 111 \ 4  scan0069
Cover page for a document about the best hypoid lubricant.30th Sep 1938Box 111 \ 4  scan0070
Semi-floating rear axle for the Bentley 50 chassis, referencing component interchangeability with the B.111 chassis.30th Sep 1938Box 111 \ 4  scan0071
Comparative cost of alternative schemes for a semi-floating rear axle based on a special roller bearing.30th Sep 1938Box 111 \ 4  scan0072
Quotation letter from The Hoffmann Manufacturing Co. Limited for the supply of special roller bearings.29th Sep 1938Box 111 \ 4  scan0073
Letter to Gleason Works detailing the results of various gear combination tests.4th Oct 1938Box 111 \ 4  scan0074
Letter to Gleason Works discussing ring gear and pinion specifications for a 12-cylinder axle.4th Oct 1938Box 111 \ 4  scan0075
Cablegram from Gleason to Roycar Derby, arranging a conference with Mr Smith.5th Oct 1938Box 111 \ 4  scan0076
Comparative factory cost analysis for two semi-floating rear axle schemes.4th Oct 1938Box 111 \ 4  scan0077
Decision to detail Scheme 2 for a semi-floating rear axle based on a cost comparison.10th Oct 1938Box 111 \ 4  scan0078
Static and vibration test report on Bentley 50 rear axle couplings, comparing a standard taper and a Barber-Colman taper spline.28th Oct 1938Box 111 \ 4  scan0079
Test report comparing standard tapers and splines under static and vibration loads.28th Oct 1938Box 111 \ 4  scan0080
Conclusion of a test report on the satisfactory performance of two couplings and their securing nuts.28th Oct 1938Box 111 \ 4  scan0081
Diagrams illustrating fretting on two types of rear axle couplings after a 330-hour endurance test.31th Oct 1938Box 111 \ 4  scan0082
Request to manufacture tapered packing pieces for testing the effect of tilting the rear axle on Bentley car 1.B.50.31th Oct 1938Box 111 \ 4  scan0083
Requesting the preparation of material blanks for two sets of offset gears for trial by Gleasons in America.3rd Nov 1938Box 111 \ 4  scan0084
Test report on the Bentley 50 rear axle, specifically concerning the differential gearbox's Belleville washer and Timken bearing.22th Nov 1938Box 111 \ 4  scan0085
Test report on the effect of a 'Belleville' spring washer on the removal load for a Bentley 50 rear axle.23th Nov 1938Box 111 \ 4  scan0086
The return of unsatisfactory gears to The Gleason Works for credit.28th Nov 1938Box 111 \ 4  scan0087
Letter from Gleason Works regarding the failure of a pair of hypoid gears due to overload during testing.16th Nov 1938Box 111 \ 4  scan0088
Apology letter to The Gleason Works regarding a misunderstanding about returned hypoid gears.29th Nov 1938Box 111 \ 4  scan0089
Attempt to get credit from Gleasons for incorrectly labelled faulty gears.29th Nov 1938Box 111 \ 4  scan0090
Credit dispute over gears returned to Gleasons of Rochester, N.Y., and related internal communication.30th Nov 1938Box 111 \ 4  scan0091
Short memo confirming the closure of a transaction.30th Nov 1938Box 111 \ 4  scan0092
Design and modifications for a semi-floating rear axle centre casing.3rd Dec 1938Box 111 \ 4  scan0093
Of the B.50 rear axle scheme for B.50 cars.5th Dec 1938Box 111 \ 4  scan0094
Correspondence regarding a claim for a refund of import duty on defective Gleason Gears returned to the supplier.8th Dec 1938Box 111 \ 4  scan0095
Letter from Customs & Excise regarding an application for repayment of duty on gears returned to U.S.A. suppliers.6th Dec 1938Box 111 \ 4  scan0096
Responding to questions from Customs authorities regarding a test on Gleason gears.16th Dec 1938Box 111 \ 4  scan0097
The test of a Bentley 50 gearbox in a Phantom III chassis.20th Dec 1938Box 111 \ 4  scan0098
Suggesting dimensions for the B.50 rear axle, specifically a 59' track and 40 mm half shafts.2nd Mar 1939Box 111 \ 4  scan0099
Particulars for five new semi-floating axles, model PD.312, including ratios, track widths, and brake types.9th Mar 1939Box 111 \ 4  scan0100
Production status and delays for various new rear axle components.18th Mar 1939Box 111 \ 4  scan0101
Modified oil seals, the machining of an axle, and requesting a final decision.18th Mar 1939Box 111 \ 4  scan0102
Request for blueprints and parts for a Bentley 50 chassis rear axle modification.13th Apr 1939Box 111 \ 4  scan0103
Request for blueprints and production of front axle yokes for a Bentley 50 chassis.22th Apr 1939Box 111 \ 4  scan0104
Endurance tests conducted on Bentley rear axle shafts, comparing them to a Cadillac shaft.16th May 1939Box 111 \ 4  scan0105
Test report on shaft and bearing wear and performance under various loads and speeds.16th May 1939Box 111 \ 4  scan0106
Sketch of wear on a Bentley rear axle shaft after being dismantled.30th Dec 1938Box 111 \ 4  scan0107
Sketch detailing wear on a bearing inner race and retaining collar from a B50 rear axle shaft test.30th Dec 1938Box 111 \ 4  scan0108
Bentley III rear axle shaft and bearing test results.30th Mar 1939Box 111 \ 4  scan0109
Test report on an Acme thread oil seal for a Bentley 50 rear axle.1st Jun 1939Box 111 \ 4  scan0110
Leakage tests of a shaft seal under varying pressure and temperature conditions.1st Jun 1939Box 111 \ 4  scan0111
Graph showing the results of an Acme thread test for B50 rear axle oil seals, measuring leakage variation with pressure and shaft speed.2nd May 1939Box 111 \ 4  scan0112
Graph plotting leakage against shaft speed from an Acme thread test on B50 rear axle oil seals.1st May 1939Box 111 \ 4  scan0113
Graph plotting leakage against shaft speed at various temperatures for an Acme thread test on B.50 rear axle oil seals.2nd May 1939Box 111 \ 4  scan0114
Internal request to order various road springs for Bentley V & 50 cars.31th Mar 1939Box 111 \ 4  scan0115
Proposing to build a new frame for a 4.B.50 chassis to accommodate an eight-cylinder engine.23th Dec 1938Box 111 \ 4  scan0116
The filing of coachwork design PD.323 for the 'Lagonda Chaser' chassis 4.B.50.28th Dec 1938Box 111 \ 4  scan0117
Specification sheet for the Bentley 'Chaser' model, detailing components and modifications.29th Dec 1938Box 111 \ 4  scan0118
Specification sheet detailing various chassis and component parts.29th Dec 1938Box 111 \ 4  scan0119
Status update list for various vehicle components including steering, water pump, and flywheel.29th Dec 1938Box 111 \ 4  scan0120
Specification sheet outlining modifications and instructions for various vehicle components.29th Dec 1938Box 111 \ 4  scan0121
List of electrical components and their associated part numbers or current status.29th Dec 1938Box 111 \ 4  scan0122
Deferring the decision on rim fittings, lubrication hoses, and their fittings.29th Dec 1938Box 111 \ 4  scan0123
Internal memorandum to place an order for a Bentley 50 Radiator with Messrs. John Marston Ltd.30th Dec 1938Box 111 \ 4  scan0124
The preparation and dispatch of parts for a chassis frame to John Thompsons.17th Jan 1939Box 111 \ 4  scan0125
Petrol tank capacity and weight for the Bentley Cresta, specifically for continental touring.25th Jan 1939Box 111 \ 4  scan0126
Appendix page comparing the weight and capacity calculations for Continental B.5. and Bentley Cresta tanks.26th Jan 1939Box 111 \ 4  scan0127
Petrol tank capacity and fuel consumption for the Bentley Cresta.26th Jan 1939Box 111 \ 4  scan0128
Petrol tank support for the Bentley Cresta, detailing the fitting of a Corniche tank and alternative support methods.10th Feb 1939Box 111 \ 4  scan0129
Confirming the use of B.V. yokes on car 4.B.50 for a narrow front track.4th Mar 1939Box 111 \ 4  scan0130
Secret and confidential letter to Park Ward & Co. Ltd. about the design of a new Bentley 'Cresta' type chassis and body.20th Mar 1939Box 111 \ 4  scan0131
Confirming the dispatch of coachwork design PD.371 and the placement of an order for the first Bentley 'Cresta' 4.B.50 body.20th Mar 1939Box 111 \ 4  scan0132
Specification of coachwork for a Four Door Four Light Saloon, the Bentley 'Cresta'.20th Mar 1939Box 111 \ 4  scan0133
Specification document detailing various car body and interior features.20th Mar 1939Box 111 \ 4  scan0134
Specification sheet detailing various vehicle components, fittings, and their requirements.21th Mar 1939Box 111 \ 4  scan0135
Letter to coachbuilder Park Ward & Co. Ltd. detailing chassis specifications for a 4.B.50 'Cresta' model.21th Mar 1939Box 111 \ 4  scan0136
List of vehicle components with updates on their corresponding design schemes and drawing references.21th Mar 1939Box 111 \ 4  scan0137
Specification sheet detailing the instrument board, bonnet eye, spare wheel housing, and chassis construction.24th Mar 1939Box 111 \ 4  scan0138
Specifications for a gearbox and axle.24th Mar 1939Box 111 \ 4  scan0139
Letter to Park Ward & Co. Ltd. detailing specifications and agreements for a Bentley Cresta 4.B.50.25th Mar 1939Box 111 \ 4  scan0140
From the Chief Engineer regarding the deletion of the rear seat arm-rest's concealing flap.6th Apr 1939Box 111 \ 4  scan0141
Scheme showing the Bentley 'Cresta' front wheel clearance at full bump and lock.6th Apr 1939Box 111 \ 4  scan0142
Requesting particulars for a radiator and bonnet to progress with a car build.19th Apr 1939Box 111 \ 4  scan0143
The design progress and timeline for the new 4.B.50 radiator.20th Apr 1939Box 111 \ 4  scan0144
Modifications and drawings for the 'Cresta' Radiator, Wingstays, Horns, and Front Apron.26th Apr 1939Box 111 \ 4  scan0145
Letter sent to Park Ward & Co. Ltd. enclosing blueprints for Chassis 4.B.50 (Cresta).2nd May 1939Box 111 \ 4  scan0146
Letter to coachbuilder Park Ward & Co. Ltd. specifying paint, interior, and body details for a Bentley 'Cresta' car.12th May 1939Box 111 \ 4  scan0147
Arranging the transport of an experimental dummy chassis to Park Wards and the return of a complete body.17th May 1939Box 111 \ 4  scan0148
The schedule for issuing drawings for the radiator, shutters, and bonnet for a 'long distance job'.23th May 1939Box 111 \ 4  scan0149
Delayed receipt of drawings for a Bentley 4.B.50 'Cresta' Radiator and Bonnet.23th May 1939Box 111 \ 4  scan0150
The standardisation of a 3/4° castor angle for B.V. steering systems and the preparation of required parts.23th May 1939Box 111 \ 4  scan0151
Confidential letter to Park Ward & Co. Ltd requesting details for the front headlamp design on chassis 4.B.50 - Cresta.23th May 1939Box 111 \ 4  scan0152
Letter to a coachbuilder regarding the approval of paintwork and interior trim samples.27th May 1939Box 111 \ 4  scan0153
Letter sent to Messrs. Park Ward & Co. Ltd. regarding blueprints for the bonnet of chassis 4.B.50 (Cresta).27th May 1939Box 111 \ 4  scan0154
Confidential letter to coachbuilder Park Ward & Co. Ltd. regarding chassis blueprints for the 4.B.50 (Cresta) model.27th May 1939Box 111 \ 4  scan0155
Letter to Park Ward & Co. Ltd. thanking them for a Cresta front wing model section and various tracings.8th Jun 1939Box 111 \ 4  scan0156
Letter confirming an agreement to add a stiffening plate to chassis 4.B.50 - Cresta.9th Jun 1939Box 111 \ 4  scan0157
Confidential letter to Park Ward & Co. Ltd. detailing modifications for a Bentley mock-up radiator shell.21th Jun 1939Box 111 \ 4  scan0158


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