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).
Requesting a report on a knocking noise in the Goshawk engine's magneto drive at low speeds.
| Identifier | WestWitteringFiles\E\September1920\ Scan22 | |
| Date | 27th September 1920 | |
| To HS.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} Copy to Cd. " " DA{Bernard Day - Chassis Design} " " EFC. ORIGINAL X.3580. X.3548. RE "GOSHAWK" MAGNETO DRIVE. 4 D EL/G25/9/20. 27 SEP 1920 RECEIVED In accordance with Mr. Royce's wishes, would you kindly report as to whether the magneto on the "Goshawk" causes a knock in the driving gear at slow engine speeds. It was Napier experience that the water pump and magneto cross drive whether at the front or rear of the engine was noisy, due to the variations in the torque of the magneto and the slack which necessarily occurs in skew gearing. It was found that it could be cured, as one would expect, by applying friction to the magneto drive shaft. The above has an important bearing on the arrangement of the "vulture" engine which is going forward now. E.{Mr Elliott - Chief Engineer} | ||