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).
Performance results of a 1.EX Car tested at Brooklands with 14-tooth and 15-tooth axles.
| Identifier | ExFiles\Box 29\3\ Scan103 | |
| Date | 13th September 1922 | |
| [Handwritten] X788 [Handwritten] X788 / X3763 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to BJ. c. to Da.{Bernard Day - Chassis Design} Hs{Lord Ernest Hives - Chair}7/LG13.9.22. Herewith results obtained on Brooklands with 1.EX Car fitted with a 14 tooth axle with high and low compression and a 15 tooth axle - high and low compression. The results show practically no difference in maximum speeds with the 14-tooth axle compared with the 15-tooth axle. We are not satisfied with the results because they do not agree with the previous set of tests taken on Brooklands. The 15-tooth axle results are not as good as we obtained then. We consider however the results show that the car fitted with the 14-tooth axle will give the best performance, under all reasonable conditions. 107-MG car came on the Track when we were there and we timed that car to do a lap at 71 m.p.h. This car was fitted with a 14 tooth axle and low compression. Hs.{Lord Ernest Hives - Chair} | ||