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).
Back axle gear ratios and the potential for two different vehicle models.
| Identifier | ExFiles\Box 2\6\ B002_X 140 141 157-page117 | |
| Date | 21th April 1911 | |
| 21st April 1911 C.J. (3) realise that we must always be experimenting and if it is advisable that the ratio of the back axle be changed from 3 to 1 to nearer 4 to 1. I think it would be hopeless to try and get such an axle reasonably quiet with bevel gears, and there is no doubt that such a ratio would be exceedingly useful for big, heavy bodies which no one thinks of driving at more than 40 miles per hour. In conclusion, therefore, it looks as though two models would be perfection, - one with bevel gears and wire wheels and higher speed gearing, fitted with bevels, and a second model having a long, heavy chassis, geared for low speed to carry extra heavy bodies. At first sight it does not look COPY TO F.H.R. FOR MR. CLAUDE GOODMAN | ||