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 'E.' to 'DA.' giving instructions on axle tube modifications and axle ratios, referencing specific engine types and design schemes.
| Identifier | WestWitteringFiles\E\June1920\ Scan43 | |
| Date | 30th June 1920 | |
| To DA.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} -2- E5/G30/6/20 Contd. (5) The heel on the flanges of the axle tubes should be still further extended by about .100" on the radius, gashes being arranged as on N. scheme 503, to accommodate the bevel pinion bearing cap bolts. Referring to the axle ratio, it is not likely now that a larger ratio than 4 to 1 will be required, since the capacity of the "Vulture" engine will be approximately equal to that of the "Buzzard" instead of being smaller as formerly. Referring to the bell-mouth axle tube shewn on N. scheme 503, kindly note that Mr. Royce proposes to abandon this. Would you please proceed with the detail work in connection with N. scheme 339, in accordance with Mr. Royce's wishes, without any further reference. E.{Mr Elliott - Chief Engineer} | ||