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).
Development of a Phantom III gearbox with an overdrive ratio.
| Identifier | ExFiles\Box 94\2\ scan0094 | |
| Date | 1st December 1936 | |
| 328 Sg.{Arthur F. Sidgreaves - MD} from Rm.{William Robotham - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Hdy.{William Hardy} P.III Gearbox. Rm{William Robotham - Chief Engineer}4/R.1.12.36. Replying to Sg.{Arthur F. Sidgreaves - MD}15/E.27.11.36., we hope to be able to let you try the box with the over-drive ratio before Cristmas. We should like to point out that we do not anticipate a 3-speed box with an over-drive ratio will be any less complicated, or bulky, than the existing 4-speed gearbox. Referring to the Packard box, we cannot use the one off the car which EP.{G. Eric Platford - Chief Quality Engineer} has, as it is too small for the P.III. Rm.{William Robotham - Chief Engineer} | ||