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).
Standardisation of Thermoid facing on the Bentley clutch plate.
| Identifier | ExFiles\Box 171\5\ img001 | |
| Date | 8th November 1937 | |
| RR 755B (10H) (49968) 19/10/37 C.E.Co. COMPLETED 8.12.37. BENTLEY STANDARDISATION OF PARTS Date Issued: 8.11.37 Sheet No.: B.1. Drg. No.: L.O.P.S. Description: THERMOID FACING ON CLUTCH PLATE. (CLUTCH PLATE UNALTERED). Purpose: To eliminate jaggers, improve smoothness, and reduce rate of wear. Brief Report and Remarks Mileage on experimental cars - 3.B.IV. 3943. 6.B.IV. 4977. B.23.AE.7586. Also tested on 2 production chassis by Mx.{John H Maddocks - Chief Proving Officer} and smaller mileages on others, total over 17,000. All smooth takeup. No jaggers. Also on several customers cars to cure complaints including considerable mileage by Raymond Mays. NOTE. - There is no risk of slip so long as thrust springs are up to standard (150 lbs) arrangements are being made to enable Depots to check this. Material is available. When recommended for Introduction: As soon as possible. Old Parts: Material £2.9.0, Labour BOUGHT OUT, Total £2.9.0. New Parts: Material £2.10.0, Labour ", Burden ", Total £2.10.0. Increase in Cost £ 0.1.0. GRL 23/11/37. Production Position and Comments Cost of Tools £ 0.0.0. In the changeover it will be necessary for Depots to have equipment for the purpose of testing clutch pressures which will Cost approximately £32.0.0d. per set. The object of this equipment is to ensure that clutch spring loads are up to Standard in order to obviate the possibility of clutch slip with the new linings. A quantity of some 45 stock clutch plates have been despatched to Messrs. Borg & Beck for conversion to Thermoid facings at a cost of 5/6d. each. When these are available it will be possible to commence fitting to Production Chassis. Authorisation to Proceed. Signature Sg.{Arthur F. Sidgreaves - MD} [Signature] Hs.{Lord Ernest Hives - Chair} HE Date 7-12-37 Introduce on the... Chassis in... Series. Handwritten note: When stocks exhd. on Plate | ||