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).
Use of straight versus helical teeth for an S.S. chassis starter motor.
| Identifier | ExFiles\Box 64\4\ scan0091 | |
| Date | 12th October 1928 | |
| BY/RD. from EFC. X7655B EFC1/T12.10.28. S.S. CHASSIS STARTER MOTOR. We have your EY/RD8/ML11.10.28 and agree that straight teeth should be tried with this arrangement. I was not aware that they had already been instructed for the three S.S. chassis. I also agree that it should not be attempted to try the 100 teeth at the moment. I do not think we should try an additional set of 5°, especially if we are making anotherm motor with 5° helical for 9-EX. My impression was, by looking at the teeth on the first S.S. engine on the test bed, that these teeth were also 5° helical, and if this is not the case would you let me know. EFC. | ||