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(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 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 | ||
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).