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).
Proposal detailing material specifications for returning to non-casehardened splines in Phantom gearboxes.
| Identifier | ExFiles\Box 94\2\ scan0118 | |
| Date | 14th December 1936 | |
| Grx. Cost affected? RHC.{R. H. Coverley - Production Engineer} [crossed out] Rm.{William Robotham - Chief Engineer} [crossed out] E.{Mr Elliott - Chief Engineer} [crossed out] Hs.{Lord Ernest Hives - Chair} [crossed out] 328 BY.6/G.14.12.36. RE: PROPOSAL TO RETURN TO NON-CASEHARDENED SPLINES. It is important in carrying out any experiments in this direction to ensure the following points being arranged for :- (a). The use of a shaft, the shaft should be made in 3 1/2% nickel steel with a brinell of 321/341. (b). The gears should be made in SZNX. which is the harder quality of 5% case hardened nickel steel. The splines will then be suitable for the service which is proposed for them. Personally I see no reason why in the first place we should have departed from this, which is our standard practice. By BY.{R.W. Bailey - Chief Engineer} | ||