Blueprint for an experimental spring-drive for the Goshawk-III engine.
| Identifier | ExFiles\Box 25\3\ Scan280 | |
| Date | 31th October 1927 guessed | |
| EXPERIMENTAL SPRING-DRIVE, GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))-III, 1A, 1.C, 1.B, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21 | ||
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).