The Phantom lightened crankshaft and G.1. type spring drive.
| Identifier | ExFiles\Box 65\4\ scan0201 | |
| Date | 24th September 1927 | |
| BY. {R.W. Bailey - Chief Engineer} from E. {Mr Elliott - Chief Engineer} c. to BJ. Hs. {Lord Ernest Hives - Chair} X8010 E2/M24.9.27. PHANTOM LIGHTENED CRANKSHAFT AND G.1. TYPE SPRING DRIVE. X. 8010 X. 4222 We send herewith Lec. 2462 shewing the above. Particulars of the driving spring will be sent later. The driving spring used on the present Phantom is exceptionally stiff, and has a very high stress. We cannot get this poundage into the new spring drive, and at the same time we do not think it will be necessary, owing to the different way in which the timing gear is driven. The crankshaft shewn is intended to be machined from the existing forging. We want you to leave as much metal in the outline of the webs as possible, making them of oval shape. E. {Mr Elliott - Chief Engineer} | ||
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).