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).
Blueprint drawing with dimensions for an L.P. Valve.
| Identifier | ExFiles\Box 151\2\ scan0105 | |
| Date | 6th October 1933 | |
| Hs {Lord Ernest Hives - Chair} 1172 .265 DIA IMPORTANT VALVE SEAT .062 .360 DIA L.P. VALVE FOR Hs. {Lord Ernest Hives - Chair} 1170 1.100" .1875-1/2 DIA 60° .850 .050 RAD IMPORTANT DIA,S 125-1/2 DIA .062 HOLE .150 DEEP N/S W.D | ||