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).
Experimental Wraith crankshafts, comparing different steel types and the effect of nickel content.
| Identifier | ExFiles\Box 8\5\ 05-page16 | |
| Date | 29th December 1937 | |
| ROY{Sir Henry Royce} Mr. Hs.{Lord Ernest Hives - Chair} Mr. Rms. c. Rm.{William Robotham - Chief Engineer} 617. BY.5/G.29.12.37. SWDL{Len H. Swindell} WRAITH CRANKSHAFTS. Referring to the two experimental shafts for which you obtained a price from the English Steel Corporation at our request, the object of obtaining the shafts in question is to run tests to justify reverting to a steel of this type as against the V.C.M. There is no prospect of our being able to use this material on early Wraith chassis. In regard to the question of the 1% nickel I raised this question with the English Steel, as in my view the 1% nickel was a disadvantage for our purpose, and if the shaft could be run safely without the 1% nickel there would be a distinct gain in bearing life. BY.{R.W. Bailey - Chief Engineer} | ||