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 switch to S.L.V. steel for exhaust valves and the resulting scrap costs.
| Identifier | ExFiles\Box 14\6\ Scan150 | |
| Date | 8th April 1930 | |
| COPY. Y7230. BY.{R.W. Bailey - Chief Engineer} From Sft.{Mr Swift} c. Wor.{Arthur Wormald - General Works Manager} c. Hs.{Lord Ernest Hives - Chair} c. ROY.{Sir Henry Royce} SFT.{Mr Swift}4/B.8.4.30. X.4429: X.7230: X.5230: EXHAUST VALVES. With reference to memo BY16/N7.4.30. instructing us that we should revert to S.L.V. steel in place of H.R. Crown steel for exhaust valves on both types of cars, please note we can introduce the exhaust valves of S.L.V. in three weeks time on Phantom ll, and in four weeks time on the 20/25 HP. I must point out however, that this will involve scrap as follows :- E.79737. Phantom ll Valves in H.R. crown steel fully machined and part machined...........£135. E.55559. 20/25HP. Valves in H.R. crown steel full machined and part machined........................£201. Total of.....£336. In addition to which, I understand, there are in stock some lengths of 1" and 1-3/8" bar, representing steel of approximately £550 value. In the meantime we have immediately stopped work on the H.R. crown and are pushing on as quickly as possible the production of valves from S.L.V. steel in accordance with instructions contained in your memo. Sft.{Mr Swift} | ||