Production test results for a Goshawk Dynamo R3 with an annealed copper commutator.
| Identifier | ExFiles\Box 50\5\ Scan324 | |
| Date | 21th June 1924 | |
| X 4333. EEC. WA. {Mr Wallis} 50. 21.6.24. X.4383. PRODUCTION TEST OF GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) DYNAMO R3. WITH ANNEALED COPPER COMMUTATOR, AFTER BEING SET TO GENERAL SPECIFICATION. Open circuit volts (cold) at 600 r.p.m. 15.1. Closed circuit volts (warm) after 20 mins run at 1450 r.p.m. 14.65. Ampere output under same conditions:- 13.3 amperes. Open circuit volts (warm) at 700 r.p.m.:- 17.0. HEW. | ||
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).