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).
Mr. Royce's decisions on new materials for exhaust valves and valve guides for all engines.
| Identifier | ExFiles\Box 14\6\ Scan103 | |
| Date | 30th July 1929 | |
| WGR. HS.{Lord Ernest Hives - Chair} RE. X7230 BY3/HP.30.7.29. X.4621 X5230 X.4011 X7230 X.4488 X8230 X9230 Exhaust Valves Chassis and Aero Engine. Mr Royce this afternoon on the telephone informed me that he wanted to bring in the new H.R. Crown Steel which is doing so well on R.{Sir Henry Royce} engine for all chassis and aero engines. He prefers to use a high conductor for Valve Guide Phos. Bronze or some similar alloy good for heat conductivity and also with high wearing qualities. He wishes us to use up present valves and valve material for inlet valves but get the new type material into service for all engines, aero and chassis immediately. We should therefore get standardization sheets moving without delay and with Wor{Arthur Wormald - General Works Manager}'s consent I propose to at once instruct Order Office to obtain the suitable sizes of billet to cover the aero and chassis engine requirements. HY.{Tom Haldenby - Plant Engineer} | ||