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).
Use of unhardened teeth on the Phantom III gearbox 1st motion shaft pinion to avoid difficulties.
Identifier | ExFiles\Box 94\2\ scan0198 | |
Date | 5th April 1937 | |
328 RHC{R. H. Coverley - Production Engineer}/Mr Bennet. c. E.E. Da.{Bernard Day - Chassis Design} Fm. HPS.{Horace Percy Smith - Experimental Factory Mgr} E/HDY.{William Hardy}1/HP.5.4.37. Phantom III Gearbox. With reference to your recent question whether we should care to adopt a constant mesh pinion mounted on a taper on the 1st motion shaft (as shown by N.Sch.4690) In order to avoid the difficulty presented by the hardened teeth on the pinion and shaft which is now experienced, we think that before we change the design in the way suggested we should try these teeth unhardened. The adjacent cylindrical surfaces should also be tried unhardened. We understand that the deletion of hardening will remove a great deal of the difficulty. We have asked the Experimental Department to try the soft surfaces referred to above on the overdrive box which is now being constructed. We understand that they are going to do this. E/HDY.{William Hardy} | ||