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).
Suitability, manufacturing, and failings of a steam valve for Phantom III production.
| Identifier | ExFiles\Box 94\3\ scan0038 | |
| Date | 21th February 1936 | |
| HS{Lord Ernest Hives - Chair}/Std.7/JH.21.2.36. Steam Valve for Ph.III Production. None of the valves which we have tested for the above purpose have been entirely satisfactory, but we think that the valve most suitable for production is that to Lec.4600. The component pressings of the diaphragm should be made at any suitable outside firm, and then sent to The Stainless Spinning Works of Birmingham, for assembly (these people having supplied us with best diaphragm to date) the joints being spun over. Stress should be laid on the fact that the final assembly must give the free position of the diaphragm as shown on E.87455 i.e. the drawing dimensions must be strickly adhered to. One modification to this scheme is required; the hexagon on the top of the standpipe to E.87457 should be moved to the bottom as on E.87913. Instructions for setting this valve will be issued shortly. The failings of this scheme as it stands at the moment are that we have yet to receive a diaphragm which is perfectly steam-tight at the joints, while this diaphragm it is possible to obtain pressures in the system in excess of 6 lbs/sq.in if boiling is sufficiently violent. We suggest that the scheme should only be used until we have had time to develop a spring loaded valve of the type used on aero header tanks, located in a different portion of the top tank. HS{Lord Ernest Hives - Chair}/Std. | ||