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).
The alteration of speedometer drive gears for the Spectre chassis.
| Identifier | ExFiles\Box 59\2\ Scan443 | |
| Date | 5th November 1934 | |
| To Hs{Lord Ernest Hives - Chair}/Wst. from HDY.{William Hardy} WST y6031 HDY.{William Hardy}1/HP.5.11.34. O.E. Speedometer - SpectreCodename for Phantom III. We have recently altered the speedometer drive gears in the gearbox as shown by N. Sch.4251 to suit the proposed axle ratio of 4.25:1 which, as far as I am aware, the second SpectreCodename for Phantom III chassis will have. The new gears are 20/9 and the servo drive is unaltered at 2/16. HDY.{William Hardy} | ||