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).
From EFC to Mr. Clough requesting details on axle ratios, tyre diameter, and gearbox ratios.
| Identifier | ExFiles\Box 15\5\ Scan068 | |
| Date | 1st February 1929 | |
| X7310 To Mr. Clough. D.O. EFCl/T1.2.29. Would you please oblige me with answers to the following questions :- (1) What are the possible S.S. axle ratios and which is likely to be the normal ? (2) What is likely to be the standard effective tyre diameter ? (3) What are the four gear box ratios, top gear being 1 : 1 ? EFC. | ||