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).
The 'Goshawk II' propeller shaft, warning that drilling it would destroy the vacuum for oil extraction.
| Identifier | WestWitteringFiles\G\September1921\ Scan11 | |
| Date | 9th September 1921 | |
| To HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} Copy to CJ. [struck through] " " EY. [struck through] ORIGINAL 1 R7/G7/9/21. RE "GOSHAWK II" PROPELLER SHAFT. Drilling the propeller shaft as shewn in Mr. Stent's sketch would destroy the vacuum which enables the felt to draw out the oil. R.{Sir Henry Royce} [Signature] RECEIVED | ||