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).
Technical drawing of the Goshawk II rear spring assembly with various measurements.
| Identifier | ExFiles\Box 49\3\ Scan079 | |
| Date | 1st February 1922 guessed | |
| 5.500 Bump without Buffer on RUBBER BUFFER. REAR SPRING. Goshawk II SPRING FLAT UNDER NORMAL LOAD X4261 4.750 MAX. BUMP 1.610 1.500 8.470 FROM CENTRE OF SPRING | ||