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).
Continued note on changing gear teeth from 5 degree helical to parallel.
| Identifier | WestWitteringFiles\T\November1928\ Scan035 | |
| Date | 16th November 1928 | |
| Contd. -2- EFC4/T16.11.28. -------------- and did not seem to be increased by making of main contact. We are also returning to parallel teeth in place of 5° helical, with the idea that perhaps it is not necessary to get the motor out of gear quickly. EFC. | ||