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).
Manufacturing process of sharp-edged pinions for experimental cars.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan226 | |
| Date | 4th May 1929 | |
| EFC1/T4.5.29. -2- Contd. completely sharp edged pinions for other experimental cars because if such pinions turn out to give consistently equally good results, there would appear no reason for the extra work involved in the rounding off. EFC. | ||