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 Joseph Lucas Limited detailing starter motor and cranking test results.
| Identifier | ExFiles\Box 62\1\ scan0224 | |
| Date | 30th November 1933 | |
| CONTINUATION JOSEPH LUCAS LIMITED PAGE 2 DATE 30th November 1933. Messrs. Rolls Royce Limited, DERBY. STARTER. Amps. 292/306. Volts. 6.4/6.1. BATTERY. Volts. 7.9/8.3 R.P.M. Starter. 366. Engine. 40. TORQUE. Starter. Lbs-Ft. 7.84. Engine. 71.8 NOTE. In deducing the torque figures a 75% gear efficiency is assumed. A spring balance on the starting handle before the cranking tests gave the following results:- On compression. 35 lbs at 7.125" radius. Off " 30 lbs at 7.125" radius. We trust that the above details will be of interest to you. Yours faithfully, JOSEPH LUCAS LIMITED. Technical Sales Department. | ||