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).
Recommendation against a 14-tooth axle, suggesting a 15-tooth axle for better performance compared to the Austrian Trials' Cars.
| Identifier | ExFiles\Box 49\1\ Scan320 | |
| Date | 25th May 1921 | |
| X35245 To BJ. from Hs.{Lord Ernest Hives - Chair} Hsl/LG25.5.21. MANCHESTER CROXLEY Referring to your BJ5/H25.5.21. We would not recommend that the 14-tooth axle should be fitted to this car. The 15-tooth axle should give an appreciably better performance than with Austrian Trials' Cars of 1913/14. Hs.{Lord Ernest Hives - Chair} [Text upside down at bottom right: R.R. 250M (100) (F) (S.H. 798) 10-12-20. C. 2648] | ||