Comparing dynamos and motors from suppliers Rotax, Lucas, C.A.V., and Smith for the Goshawk II.
| Identifier | ExFiles\Box 51\5\ Scan033 | |
| Date | 13th October 1921 | |
| To Wd. {Mr Wood / Mr Whitehead} from EFC. {E. Fowler Clarke - Electrical Engineer} X 4342 EFC {E. Fowler Clarke - Electrical Engineer} 4/13.10.21. X.4359 X.4342. DYNAMOS & MOTORS FOR GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II. We would like you to obtain for our own and Mr. Royce's information, the prices at which Messrs. Rotax, Lucas and C.A.V. would be prepared to supply dynamos and motors similar to the sample machines which they have submitted to us for the Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)). In the case of Messrs.Lucas' dynamos, we favour the single field winding machine. In the case of the Rotax there is only their dynamo. In the case of C.A.V. and Lucas, there are both dynamos and motors. In the case of Messrs. Smith, we are not interested in their prices, as both machines - dynamo and motor - appear to be quite unsuitable for the purpose. The Rotax dynamo just passes our specification as regards output, although it is inclined to be noisy on the car, but the Lucas and C.A.V. machines appear (with the exception of dynamo noise which point is not yet settled) to be very suitable for the purpose. The Lucas machines are of course better finished than the C.A.V. though we are of the opinion that there is no loss of performance with the C.A.V. machines on this account. EFC. {E. Fowler Clarke - Electrical Engineer} | ||
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).