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).
Confirming the assumption that the Goshawk's new earthed electrical system includes the heavy return current passing through the frame.
| Identifier | ExFiles\Box 51\2\ Scan060 | |
| Date | 28th November 1921 | |
| To R. {Sir Henry Royce} from EFC. {E. Fowler Clarke - Electrical Engineer} c. to CJ. c. to By. {R.W. Bailey - Chief Engineer} c. to E & Ds. X 4338 EFC {E. Fowler Clarke - Electrical Engineer} 2/T28.11.21. X.4338 - ELECTRICAL SYSTEM "GOSHAWK". With reference to your note R5/G29.8.21, instructing that the Goshawk system should be "an entirely earthed electrical system", we are going on on the assumption that this also includes that the heavy return current from the motor to the battery shall pass through the frame, instead of being provided for by a heavy current cable. We are having the motors for the six experimental Goshawk chassis made up earthed on one side in accordance with this. EFC. {E. Fowler Clarke - Electrical Engineer} | ||