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 Vickers (Aviation) Limited regarding the electrical revolution indicators used on their multi-engined machines.
| Identifier | ExFiles\Box 165\4\ img153 | |
| Date | 23th March 1932 | |
| X1350 LONDON OFFICE- VICKERS HOUSE, BROADWAY, WESTMINSTER. VICKERS (AVIATION) LIMITED. Telephone. BYFLEET 240 (5 LINES) Telegrams. VICKERS, WEYBRIDGE. DIRECTORS: SIR ROBERT MCLEAN (CHAIRMAN) SIR MARK WEBSTER JENKINSON, K.B.E., F.C.A. GENERAL SIR J.P. NOEL BIRCH, G.B.E., K.C.B., K.C.M.G. F.{Mr Friese} A.{Mr Adams} TOMLINSON SQD. COMMANDER JAMES BIRD, O.B.E., R.N. F.{Mr Friese} C. YAPP. Your Reference Es/Wst. 1/AD. Our Reference RKP/19741/LS/A.801 Enclosures ________ Weybridge, Surrey. 23rd March, 1932 Messrs. Rolls Royce Limited, DERBY. Dear Sirs, ELECTRICAL R.P.M. INDICATORS We are in receipt of your enquiry per letter of the 22nd instant respecting the type of electrical revolution indicators used on our multi-engined machines. In reply, we would say that we have fitted the Twin Aircraft with Record Instruments and the Four Engined Machine with Foster Instruments. The former type, obtainable from The Record Electrical Company Limited, Broadheath, Manchester, has a D.C. Generator producing 30 volts at 3000 rpm; the gear box is integral with the generator and can be supplied at a ratio to suit the engine. The latter type is obtainable from The Foster Instrument Company, Letchworth, Herts, and also has a D.C. Generator with integral gear box, but we have no data as to revs. or output. Yours faithfully, For VICKERS (AVIATION) LIMITED, Percy Maxwell Muller General Manager. WAP WST | ||