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).
The material specification for the Goshawk gearbox second motion shaft.
| Identifier | ExFiles\Box 75\1\ scan0312 | |
| Date | 1st March 1921 | |
| RECEIVED Ms. From BY C. Mr Brooke. VI C. Hs.{Lord Ernest Hives - Chair} III C. Dg. C. Mr D'Aeth. IV C. Mr Coverley. X4249 BY15-P1.3.21. Xerus gH GOSHAWK. GEARBOX. RE SECOND MOTION SHAFT. -------------------- I had overlooked the fact that the gear on the second motion shaft is in constant mesh with the Idler gear of the Reverse unit, and that no sliding gears are slid into mesh with it under any conditions. In view of the foregoing there is no doubt at all in my mind that the second motion shaft carrying this gear should be made in nickel steel - the Brinell figure suitable being 286 - 311. Since this gear is working always with a hardened gear the shape of the Pinion will not deteriorate, as the hardened gear will maintain the correct shape on the Pinion. BY.{R.W. Bailey - Chief Engineer} | ||