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).
Graph comparing valve areas for sleeve and poppet valves in a 3.500 bore engine.
| Identifier | ExFiles\Box 127\3\ scan0241 | |
| Date | 16th June 1941 | |
| VALVE AREAS - 3.500 BORE ENGINE. DURATION OF VALVE OPENING 230° SLEEVE VALVE POPPET VALVES LEC. 3855 IN 1.600 DIA. EX. 1.400 DIA. VALVE AREA - SQ. INS. INLET EXHAUST OPENING CLOSING DEGREES ON CRANKSHAFT FIG. 1. HS.{Lord Ernest Hives - Chair} 2064. ROLLS-ROYCE, LTD. PRINT ROOM JUN 16 1941 DERBY. | ||