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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DescriptionDateIdentifier
Letter to Borg & Beck Co. Ltd. regarding the spring thrust of a Long 10 F.O. Clutch.15th Mar 1938Box 129 \ 4  scan0173
Forwarding of a broken 11' clutch pressure plate to Messrs Borg & Beck.15th Mar 1938Box 129 \ 4  scan0174
Letter from clutch manufacturer Borg & Beck regarding a burst 11.A3 pressure plate.16th Mar 1938Box 129 \ 4  scan0175
Letter from clutch manufacturer Borg & Beck regarding the experimental fitting of a Long 10.C.F. clutch to a Bentley.16th Mar 1938Box 129 \ 4  scan0176
Letter of complaint to supplier Borg & Beck about a faulty pressure plate due to substandard iron.17th Mar 1938Box 129 \ 4  scan0177
Letter from Borg & Beck Company Ltd regarding a Long 10.C.F. Clutch for a Bentley application.18th Mar 1938Box 129 \ 4  scan0178
Specification and recommendation sheet for a Borg & Beck clutch, for a vehicle with a Bentley engine.17th Mar 1938Box 129 \ 4  scan0179
Letter to Borg & Beck Co. Ltd. regarding an experimental order for a clutch, clarifying engine bore specifications and requesting related documents.19th Mar 1938Box 129 \ 4  scan0180
Letter from clutch manufacturer Borg & Beck Company Ltd. regarding a 10 C.F. Long Clutch, specification BB.460.21th Mar 1938Box 129 \ 4  scan0181
Letter from clutch manufacturer Borg & Beck regarding a burst pressure plate.21th Mar 1938Box 129 \ 4  scan0182
Chart plotting Centrifugal Force (C.F.) against Revolutions Per Minute (R.P.M.) for various radii of rotation.24th Mar 1938Box 129 \ 4  scan0183
Letter to a supplier requesting advice on a clutch's pressure plate finish and adjusting screws.30th Mar 1938Box 129 \ 4  scan0184
Letter from clutch manufacturer Borg & Beck regarding the finish and adjustment method of a Long 10 C.F. Clutch.2nd Apr 1938Box 129 \ 4  scan0185
Suggestion to add a rubber washer as an upward stop for the clutch pedal on Wraith and Bentley models.5th Apr 1938Box 129 \ 4  scan0186
Letter to Ferodo Ltd. discussing a clutch judder issue and the frictional properties of clutch facings.7th Apr 1938Box 129 \ 4  scan0187
Letter discussing a 'juddering' clutch plate and testing a new S7732 facing material.7th Apr 1938Box 129 \ 4  scan0188
Letter from The Cleveland Graphite Bronze Co. discussing alloys, work with Chrysler and enclosing a report.8th Apr 1938Box 129 \ 4  scan0189
Letter from The Cleveland Graphite Bronze Co. discussing issues with brake servo lining, specifically unit pressure and material fading.7th Apr 1938Box 129 \ 4  scan0190
Disagreeing with an objection regarding a servo design with one disc instead of two.9th Apr 1938Box 129 \ 4  scan0191
Bursting tests and safety recommendations for a Phantom III cast iron flywheel.9th Apr 1938Box 129 \ 4  scan0192
Diagrammatic sketch of a suggested rig for a Phantom III flywheel test.8th Apr 1938Box 129 \ 4  scan0193
Letter from Ferodo Limited concerning a meeting to examine clutch plates and the S.7732 facing for Bentley/25/30 models.11th Apr 1938Box 129 \ 4  scan0194
Letter from Ferodo Limited regarding a meeting to examine clutch plates and S.7732 facings for a Bentley or 25/30 model.11th Apr 1938Box 129 \ 4  scan0195
Letter to W.E. Shilton of Ferodo Ltd. confirming a visit to Chapel-en-le-Frith.12th Apr 1938Box 129 \ 4  scan0196
The preparation of parts and modification of a flywheel to fit a 10' B & B clutch.13th Apr 1938Box 129 \ 4  scan0197
Letter from Ferodo Limited to Mr. N.R. Chandler regarding a meeting and lunch invitation.13th Apr 1938Box 129 \ 4  scan0198
Covering note sent with a re-issued copy of a previously mislaid memo.20th Apr 1938Box 129 \ 4  scan0199
Noting an alteration to the inertia ring for a semi-flexible low inertia flywheel.20th Apr 1938Box 129 \ 4  scan0200
Letter to Ferodo Ltd. following a visit to their works to investigate clutch judder and the frictional characteristics of clutch facings.21th Apr 1938Box 129 \ 4  scan0201
Visit to Ferodo Ltd. in Chapel to investigate clutch judder issues.21th Apr 1938Box 129 \ 4  scan0202
The microscopic examination of a plate, detailing steel deposits from the flywheel and the deterioration of facing materials.21th Apr 1938Box 129 \ 4  scan0203
Comparison of flywheel inertia values in lbs.ins. for various wheel and clutch combinations.22th Apr 1938Box 129 \ 4  scan0204
Clutch judder, its potential causes including ferrous coating on facings and engine mounting flexibility.28th Apr 1938Box 129 \ 4  scan0205
Letter to a supplier requesting information on an 11' Long Clutch for experimental purposes.30th Apr 1938Box 129 \ 4  scan0206
Inquiry into the number of cars fitted with graphite bronze clutch facings and any subsequent complaints received.2nd May 1938Box 129 \ 4  scan0207
Letter to Ferodo Ltd. regarding the receipt of unsolicited clutch discs.2nd May 1938Box 129 \ 4  scan0208
Letter from Borg & Beck Company Ltd. regarding the supply of a Long 11.C.F. Clutch, including drawings and price details.2nd May 1938Box 129 \ 4  scan0209
Letter from Ferodo Limited regarding the supply of clutch disc linings and a discussion about special bronze linings.3rd May 1938Box 129 \ 4  scan0210
Letter to Ferodo Ltd. declining to test obsolete clutch facings but requesting alternative samples.5th May 1938Box 129 \ 4  scan0211
Letter to Borg & Beck Co. Ltd. requesting a clutch for experimental purposes.5th May 1938Box 129 \ 4  scan0212
Two experimental discs supplied free of charge by Ferodo Ltd.5th May 1938Box 129 \ 4  scan0213
Request to place an order for a Long 11' C.F. clutch.5th May 1938Box 129 \ 4  scan0214
The approximate number of cars fitted with graphite bronze clutch facings and reporting no subsequent complaints.5th May 1938Box 129 \ 4  scan0215
Location for the Borg & Beck clutch spring test rig.6th May 1938Box 129 \ 4  scan0216
Letter from a clutch manufacturer regarding the supply of an 11' C.F. Long type clutch for experimental purposes.6th May 1938Box 129 \ 4  scan0217
Resolution of clutch and synchromesh gear issues by using lead bronze linings.6th May 1938Box 129 \ 4  scan0218
Letter to Borg & Beck Co. Ltd. regarding the driven plate for a Long 11' C.F. Clutch.7th May 1938Box 129 \ 4  scan0219
Letter from Borg & Beck regarding the specification and assembly of a Long 11.C.F. clutch.10th May 1938Box 129 \ 4  scan0220
Specification and recommendation sheet for a clutch for a 25/30 HP model.9th May 1938Box 129 \ 4  scan0221
Letter from Ferodo Limited concerning the dimensions of clutch discs and apologising for a delay in correspondence.19th May 1938Box 129 \ 4  scan0222
Letter to Ferodo Ltd. regarding clutch pressure plate dimensions.20th May 1938Box 129 \ 4  scan0223
Letter from Borg & Beck Company Ltd. confirming a telephone conversation regarding the supply of a 10' Long C.F. Clutch for experimental purposes.20th May 1938Box 129 \ 4  scan0224
Short typed memo to Roy requesting an order be sent to B. & B. based on an attached letter.20th May 1938Box 129 \ 4  scan0225
Letter to Borg & Beck Co. Ltd. requesting a 10' Long C.F. Bentley clutch for experimental work and providing a specification correction.20th May 1938Box 129 \ 4  scan0226
Letter from Ferodo Limited regarding the machining and dispatch of half a dozen S.7732 discs.23th May 1938Box 129 \ 4  scan0227
Letter from Ferodo Limited confirming the dispatch of six clutch facings.26th May 1938Box 129 \ 4  scan0228
Letter to Ferodo Ltd. regarding the receipt and testing of six 11' facings.28th May 1938Box 129 \ 4  scan0229
Letter from Borg & Beck Company Ltd. enclosing deflection curves for driven plates.28th May 1938Box 129 \ 4  scan0230
Letter from Ferodo Limited confirming the supply of clutch facings on a 'no charge' basis.30th May 1938Box 129 \ 4  scan0231
Dispatch request for clutch facings to be sent to Borg & Beck.30th May 1938Box 129 \ 4  scan0232
Letter to Borg & Beck Co. Ltd. requesting the preparation of driven plates fitted with new die-pressed clutch facings for testing.30th May 1938Box 129 \ 4  scan0233
Letter from Borg & Beck Company Ltd. regarding the supply and cost of 10' and 11' driven plates.31th May 1938Box 129 \ 4  scan0234
Price quote from Borg & Beck for driven plates fitted with Ferodo S-7732.1st Jun 1938Box 129 \ 4  scan0235
Letter to Borg & Beck Ltd thanking them for deflection curves and arranging a follow-up meeting.1st Jun 1938Box 129 \ 4  scan0236
The testing of a Borg & Beck Clutch Test Rig for Cricklewood, with requests for plate fabrication and modifications.9th Jun 1938Box 129 \ 4  scan0237
Request to Borg & Beck Co. Ltd. for various thrust springs for experimental clutches.9th Jun 1938Box 129 \ 4  scan0238
Letter from Borg & Beck Company Ltd. confirming a visit to the Rolls-Royce works.17th Jun 1938Box 129 \ 4  scan0239
Letter from a clutch manufacturer regarding the delivery of special clutch facings for testing and a proposed centrifugal clutch.21th Jun 1938Box 129 \ 4  scan0240
Completion of a test rig for Borg & Beck clutches suitable for both 25/30 and Bentley models.21th Jun 1938Box 129 \ 4  scan0241
Instruction to make and fit a pedal plate with spherical mounting for a Bendix Press-O-Meter.24th Jun 1938Box 129 \ 4  scan0242
Letter to Bendix Ltd. regarding the supply and modification of a 'Press-o-Meter' for measuring pedal pressures.24th Jun 1938Box 129 \ 4  scan0243
Letter from Bendix Limited concerning the supply and pricing of a Press-o-meter instrument.27th Jun 1938Box 129 \ 4  scan0244
Letter to Dennis Bros. regarding experimental work on clutches running in oil.28th Jun 1938Box 129 \ 4  scan0245
Newly designed rig for testing the clutch pressure on 25/30 and 4¼ Litre models.28th Jun 1938Box 129 \ 4  scan0246
Confirming a visit and demonstration related to 25/30 clutches.29th Jun 1938Box 129 \ 4  scan0247
Letter to Bendix Ltd. regarding an instrument reading and a foot plate for a Press-o-meter.29th Jun 1938Box 129 \ 4  scan0248
Short memo regarding a change in an arrival time from 11 o'clock to 10 o'clock.30th Jun 1938Box 129 \ 4  scan0249
Telegram received by telephone confirming a convenient time for a meeting.30th Jun 1938Box 129 \ 4  scan0250
Letter from Bendix acknowledging a sketch for a modification to a 'Press-o-meter'.1st Jul 1938Box 129 \ 4  scan0251
Test rig specifications for Borg & Beck clutch thrust springs on 25/30 and 4¼ Litre Bentley models.6th Jul 1938Box 129 \ 4  scan0252
Clutch judder, the function of anti-rattle springs, and related testing procedures.6th Jul 1936Box 129 \ 4  scan0253
Letter to Borg & Beck Co. Ltd. requesting a 10' Long C.F. clutch and a quotation for future bulk orders.2nd Aug 1938Box 129 \ 4  scan0254
Letter from a clutch manufacturer concerning test results and a sample driven plate for a Phantom III model.10th Aug 1938Box 129 \ 4  scan0255
Letter to Borg & Beck Co. Ltd. regarding a suggested 12' Long C.F. clutch for the Phantom III, discussing thrust and pedal pressure.11th Aug 1938Box 129 \ 4  scan0256
Letter requesting a sample clutch of American manufacture for trial purposes before quotation.11th Aug 1938Box 129 \ 4  scan0257
Letter to Borg & Beck Co. Ltd. regarding a 13 1/2' 'Borglite' Plate for the Phantom III, discussing deflection data and potential design changes.11th Aug 1938Box 129 \ 4  scan0258
Letter to Borg & Beck Co. Ltd. regarding a quotation and feedback on a 10' Long C.F. Clutch.11th Aug 1938Box 129 \ 4  scan0259
Letter to Borg & Beck Co. Ltd regarding an omitted specification form for the Phantom III Clutch.12th Aug 1938Box 129 \ 4  scan0260
Borg & Beck clutches specification sheet for a Rolls Royce Phantom III.12th Aug 1938Box 129 \ 4  scan0261
Summary discussing the application of Graphite Bronze and asbestos-based facings in clutch designs.15th Aug 1938Box 129 \ 4  scan0262
On the feasibility of a rivetless bronze-faced clutch and a response to Mr. Vandervell's query about sintered bronze.15th Aug 1938Box 129 \ 4  scan0263
Letter from Vandervell Products Ltd. confirming plans to manufacture sintered bronze clutch material and requesting information.11th Aug 1938Box 129 \ 4  scan0264
Continuation of a letter from Vandervell Products Ltd. discussing material performance for aircraft super-charger clutches.12th Aug 1938Box 129 \ 4  scan0265
Letter from Borg & Beck regarding a 12' Long C.F. Clutch for the Phantom III application.12th Aug 1938Box 129 \ 4  scan0266
Letter from Borg & Beck Company Ltd discussing a sample Borglite driven plate for the Phantom III.12th Aug 1938Box 129 \ 4  scan0267
Letter from Borg & Beck Company Ltd. regarding a 10' Long C.F. Clutch, discussing tool costs, quotations, and the finish of the pressure plate.12th Aug 1938Box 129 \ 4  scan0268
Letter from Borg & Beck Company Ltd. concerning the supply and costs of clutches for the Experimental Phantom III and Bentley applications.16th Aug 1938Box 129 \ 4  scan0269
Advice note from Borg & Beck Co., Ltd. for a 13.5 inch Borglite driven plate assembly for a Phantom III.16th Aug 1938Box 129 \ 4  scan0270
Advice note from Borg & Beck Co., Ltd. for the dispatch of a clutch assembly.16th Aug 1938Box 129 \ 4  scan0271
Letter from Bendix Limited concerning the possibility of obtaining pressure gauges calibrated from Zero to 100 lbs.16th Aug 1938Box 129 \ 4  scan0272


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