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).
Request for double sets of valve gear for the Wraith II engine to be made from Low Carbon Case Hardening Steel for testing.
| Identifier | ExFiles\Box 10\3\ 03-page009 | |
| Date | 12th February 1937 | |
| Files 654 1044 BY.{R.W. Bailey - Chief Engineer} c. Rm.{William Robotham - Chief Engineer} Pa.{Mr Paterson} INR. DSN. E.9/HP.12.2.37. We should like to have the valve gear for the Wraith II engine to LeC. 5504 instructed in Low Carbon Case Hardening Steel as well as the standard material, that is, double sets of each for test. E.{Mr Elliott - Chief Engineer} | ||