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 test results for different axle ratios at Brooklands.
| Identifier | Morton\M22\ img082 | |
| Date | 13th September 1922 | |
| Handwritten: 'Hs{Lord Ernest Hives - Chair}' Does To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to BJ. c. to Da.{Bernard Day - Chassis Design} Handwritten: COMPARABLE TESTS WITH 14x52 & 15x52 AXLE RATIOS LOW & HIGH CAR ON BROOKLANDS /EX Handwritten: ALSO A LAP WITH 107MG Stamp: ORIGINAL Hs{Lord Ernest Hives - Chair}7/LG13.9.22. X.788 X.3763. 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} | ||