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).
Extract discussing the manifestation of bevel gear period noise at slow speeds on chassis 107-A.
| Identifier | ExFiles\Box 2\6\ B002_X 140 141 157-page084 | |
| Date | 9th September 1916 | |
| M14/W9916. September 1916. 9th. EXTRACT FROM RE CHASSIS 107-A.{Mr Adams} X140 BEVEL GEARS. I noticed on several occasions when running very slowly that the bevel gear period was very manifest on this particular back axle. It spoils the beautiful smoothness that one expects from our chassis. It appears difficult to see how it can be entirely eliminated, as a gear which appears to be entirely free from this period may not be silent at other speeds. Again 4U-CB seems superior, although not an entirely quiet axle, it has improved. It suggest that to be entirely safe from this difficulty a helical bevel should be worked upon, and our first move should be to more carefully criticize the Gleason helical bevel, or make a further attempt to return to a finer pitch, as the period is muchless than a finer pitch and at a still slower speed, and if the speed of the period could be reduced it would be less frequently within the running speed. This is a point which deserves special attention. | ||