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).
Trade-offs of using a higher gear ratio on the 20/25 model and requesting experimental results.
| Identifier | ExFiles\Box 102\4\ scan0044 | |
| Date | 24th December 1929 | |
| X57350 S/W. (Hs.{Lord Ernest Hives - Chair}) Sg{Arthur F. Sidgreaves - MD}2/D.24.12.29. Re: 20/25. I remember some little time ago we had correspondence about the question of a higher gear ratio. I am not quite sure whether you have done, or are doing, any experimental work in this direction. I, of course, fully appreciate that the matter is difficult because the main complaint about the 20 was lack of acceleration and feeling of power, and if, therefore, we were substantially to increase the gear ratio with a view to obtaining higher maximum speeds, we should probably adversely affect the improvement in acceleration and feeling of power which we have obtained with the 20/25. I should, however, like to hear what experimental work has been done in this direction and with what results. Sg.{Arthur F. Sidgreaves - MD} | ||