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).
Instruction sheet detailing the optimal main brush position for Goshawk dynamos.
| Identifier | ExFiles\Box 50\5\ Scan165 | |
| Date | 30th April 1923 | |
| RR 238 (300 Bks.) (SP {Mr Spinney} 152. 6-11-18.) MP 197880 X. 4333 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC {E. Fowler Clarke - Electrical Engineer} Order No: AB 69. Customer's No.: 1 Date: 30 April 1923 GoshawkAero EngineCodename for 20HP Car / Aero Engine after KestrelAero Engine Dynamos Main brush position. The best position of the main brushes on the GoshawkAero EngineCodename for 20HP Car / Aero Engine after KestrelAero Engine dynamos for cutting-in, output, & commutation as deduced from curves of performance of standard & experimental machines is about 9° 10' retarded from the neutral position. The present standard position is approximately 1° 50' retarded, so that the further movement required is 7° 20'. Signed: F.J. Allen This Sheet must be filed on completion of the work. | ||