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).
Proposed modification to the Goshawk 11 propeller shaft and its negative impact on the oiling system.
| Identifier | ExFiles\Box 77\1\ scan0139 | |
| Date | 7th September 1921 | |
| To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to CJ. c. to BY.{R.W. Bailey - Chief Engineer} X4255 R7/G7.9.21. COSHAWK 11. PROPELLER SHAFT. X.4255 Drilling the propeller shaft as shewn in Mr. Stents' sketch would destroy the vacuum which enables the felt to draw out the oil. see original for sketch. R.{Sir Henry Royce} | ||