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).
The experimental use of H.R. Crown Steel for inlet valves as a replacement for S.L.V. steel.
| Identifier | ExFiles\Box 52\2\ Scan233 | |
| Date | 24th July 1930 | |
| RECEIVED JUL 12 1930 H [crossed out] ROY. {Sir Henry Royce} [/crossed out] [crossed out] C. WOT. [/crossed out] [crossed out] C. SH. [/crossed out] C. Hs. {Lord Ernest Hives - Chair} X44-9 BY1/G.24.7.30. X4429 VALVE STEEL. ------------ As I explained on two previous occasions it is not possible for us at this stage to issue any instructions to use H.R. Crown Steel on the inlet valves in place of S.L.V. Experiments are in hand to demonstrate whether we can use the steel, (and I believe we shall be able to ultimately) but until we have ample evidence that it will cause no trouble the matter must rest as it is. Firths were in no sense responsible for us adopting the steel, we did it on our own initiative without consulting them. BY. {R.W. Bailey - Chief Engineer} BH | ||