Ignition system for the Goshawk I engine, comparing various magneto and battery ignition options.
| Identifier | ExFiles\Box 61b\4\ scan0007 | |
| Date | 15th February 1921 | |
| To Hs. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce} c. to CJ. c. to EFC. {E. Fowler Clarke - Electrical Engineer} X.4275 R10/G15.2.21. X. 3485 - RE "GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) I" - IGNITION. X.4275. X.3481. I do not think it would be good to put on the Bosch (American) ignition until Clark has tested this. I should prefer to fit a set of Delco, but with a good magneto which will fire the engine at very slow speed, as the sleeve type of Watford or B.T.H. I do not see any object in fitting battery ignition. We do not want to spend any more on this model than enough to make just a few of these run well to compare with "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II" with its somewhat different construction. R. {Sir Henry Royce} | ||
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).