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).
Stresses on shafts, worm axle designs, and a comparison with a Daimler axle.
| Identifier | ExFiles\Box 77\1\ scan0099 | |
| Date | 6th July 1911 | |
| No. 2. to bring the moving parts to rest so rapidly as to set up very big stresses in the shafts, much greater than any stress due to frictional resistance between tyre and road. [Handwritten]: What conclusion do you arrive at should shafts be made stronger. See attached Memo marked AA.{D. Abbot-Anderson} Submit to works cttee. F 6/vii 11 Re Worm Axle. I understand from Mr. Spinney we are to use inverted springs on above axle. The Hindley Worm Axle drawings are practically complete, only small details and supervision sheets being left to complete details. We are getting out a straight worm to reduced addendum similar in tooth section to the Hindley type. I am inclined to think that a large angle thread, say 54° to 60°, giving a triangular section is worth trying as a matter of efficiency. -------------------------------------------- I went down and examined a 38 h.p 6-cylinder Daimler at Messrs. Holmes, the difference in dimensions from centre of axle to bottom of worm case is 9.3" in Daimler against 9.6" in R.R. axle. The Daimler has wheels 935 x 135 giving a road clearance of 7.5"; if we fitted similar wheels our clearance would be 7.2". [Handwritten]: R.R. 8.4 with 895/150 (32") [Handwritten]: Why should we not have same clearance? Submit to Cttee. 6/vii 11 | ||