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).
With a sketch providing machining instructions for the 'Goshawk II' crankshaft.
| Identifier | ExFiles\Box 74\3\ scan0229 | |
| Date | 16th September 1921 | |
| X4221 FC SEP 16 1921 BY/Shn1/DB.{Donald Bastow - Suspensions}16.9.21. To RHC.{R. H. Coverley - Production Engineer} from BY/Shn. c. to EFC. c. to Srt, c. to Wd{Mr Wood/Mr Whitehead}, c. to Mr Broome. RECEIVED. X.4221 - "GOSHAWK II" - CRANKSHAFT. In accordance with Mr Royce's requirements (E1/G.13.9.21), will you please instruct that wherever possible the front end of the crankshaft carrying the spring drive, should be machined the same diameter as the front journal bearing, as shown on the sketch below. This is required for the new design of spring drive, which is in hand at West WitteringHenry Royce's home town. Machining of inside not yet designed 1.9995 Dia. 5.400 C of No 1 Crank SC 816 9/21 BY/Shn. | ||