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).
Discussion with diagrams on modifying gear tooth form to improve engagement.
| Identifier | ExFiles\Box 64\4\ scan0149 | |
| Date | 21th December 1928 guessed | |
| -2- Contd FIG.3. This suggests that the form of the engagement should be reduced from edges to points, or even to a single point on one tooth only since the engagement with teazer current is gentle. The most practical method of accomplishing this appears to be by chamfering the engaging face of one of the gears and using a small radius on the corner of the other gear as in fig.4. FIG: 4. In practice no doubt it would be better to apply the chamfer to the flywheel gear, but it would be more easy to make a trial by chamfering the pinion. Angle A should be made large enough to push the gears apart should the pinion happen to contact on two teeth simultaneously. E.{Mr Elliott - Chief Engineer} | ||