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).
Letter from clutch manufacturer Borg & Beck regarding clutch specifications.
| Identifier | ExFiles\Box 129\2\ scan0118 | |
| Date | 20th November 1935 | |
| Telegrams BORGANBECK, LEAMINGTON SPA. Telephone LEAMINGTON SPA 1550-1. BORG & BECK COMPANY LTD. MANUFACTURERS OF CLUTCHES. Registered Office BROCK HOUSE, LANGHAM STREET, LONDON, W. I. WORKS: Tachbrook Road, LEAMINGTON SPA, Warwickshire. Directors E.{Mr Elliott - Chief Engineer} B. BOUGHTON. W. EMMOTT. D.{John DeLooze - Company Secretary} T. BROCK. Your Ref Hs{Lord Ernest Hives - Chair}/Smth.17/KW. Our Ref TS/HTB/LP.{Mr Lappin} 20th November 1935. Messrs. Rolls-Royce Ltd. DERBY. For the attention of Mr. F.{Mr Friese} D.{John DeLooze - Company Secretary} Smith. Dear Sirs, We have to acknowledge with many thanks receipt of your letter of the 19th instant and in reply thereto would advise that on our 10" and 11" clutches the release lever ratio is 5.5 : 1. This you will appreciate will give you an approximate theoretical pressure plate lift of .079". It is, however, not usual for this figure to be maintained due to the very slight amount of deflection in the clutch cover, but the actual pressure plate lift obtained will we feel sure be sufficient for ensuring clean clutch release. Trusting the above is the information you desire, we are, Yours faithfully, BORG & BECK COMPANY LIMITED. H.T.Barker. | ||