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).
Phantom II sequence starter engagement, suggesting an experiment using slightly helical teeth to solve insufficient teazer engaging force.
| Identifier | ExFiles\Box 168a\2\ img029 | |
| Date | 18th March 1931 | |
| E.7.C. Ref. No. WE88. X6080 Date 18-3-31 X.NOS 6079. 6080. Phantom II Sequence Starter engagement. There does appear to be a greater proportion of rotational torque to axial force on engagement with the standard sequence starter i.e. the gear teeth friction is relatively large when engaging on the teazer. We would like to suggest that an experiment be made on our rig with slightly helical teeth (as was the case on old 9EX). This experiment should prove valuable and might offer a solution to the problem of insufficient teazer engaging force. There does not appear to be any reserve of power longitudinally when the teeth are engaged to deal with slight frictional effects on the motor. The reason helical teeth were not used was that at the time no damper was fitted to the motor and the armature thumped badly on disengage-ment. It is essential on this account to keep the helix angle as small as possible. HEWest. | ||