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).
Oil leak from the Goshawk II propeller shaft's rear bearing covers, concluding the cause is a vacuum effect.
| Identifier | ExFiles\Box 77\1\ scan0138 | |
| Date | 7th September 1921 | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to CJ. c. to Hs.{Lord Ernest Hives - Chair} X4255 R8/G7.9.21. X.4255 - RE GOSHAWK II. PROPELLER SHAFT. You will see by the memo. to Mr. Hives that we consider it is the vacuum which is pulling out the oil from the rear bearing covers, and we do not think that an inside felt would be of any use. It would have to be larger than the outside one, which is not practical. It would also cost money. If there is any pumping action round this corner it will either pump water in or throw oil out, so we must stop it pumping, and the only way to do this appears to be to destroy the vacuum. R.{Sir Henry Royce} | ||