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).
Requesting comparative tests on Wraith Side Steering Tube Springs made from two different types of steel.
| Identifier | ExFiles\Box 9\7\ 07-page175 | |
| Date | 6th July 1938 | |
| 650 Rm{William Robotham - Chief Engineer}/F.Hardy. BY.16/N.6.7.38. Wraith - Side Steering Tube Springs. Further to our memo BY.8/G 13.5.38, sending you half a dozen springs produced in Chrome Vanadium Steel, by J.B.Skinner & Co. Sheffield, we are handing you herewith six further springs produced in High Carbon Steel by the Tempered Spring Co. Will you please carry out similar tests with these springs, to those you did with the chrome vanadium springs. BY.{R.W. Bailey - Chief Engineer} | ||