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).
Request for the preparation of three experimental ballast resistances for the Goshawk ignition system.
| Identifier | ExFiles\Box 54\5\ Scan185 | |
| Date | 13th February 1922 | |
| X3485. To RHC. {R. H. Coverley - Production Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} EFC {E. Fowler Clarke - Electrical Engineer} 1/T13.2.22. X.3485. RE GOSHAWK BALLAST RESISTANCE. Would you kindly prepare three experimental ballast resistances for use with B coils, but with 40 coils of wire on the ballast in place of 50, as instructed on D.50197. Would you kindly note that one of these should be handed to us to enable us to confirm satisfactory operation on the Goshawk ignition on 8 volts, at the very earliest opportunity. EFC. {E. Fowler Clarke - Electrical Engineer} | ||