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).
Hispano valve timing diagram and inlet valve displacement curve.
| Identifier | Morton\M4.2\ img036 | |
| Date | 10th March 1924 guessed | |
| HISPANO VALVE DIAGMS. EFFECTIVE TIMING DIAGM. 5° IN.O Ex.C. 45° 45° IN.C. Ex.O. HISPANO SUIZA INLET VALVE DISPLACEMENT CURVE. WITH 2 m.m. clee MAX LIFT = .388 VALVE LIFT (INCHES) .400 .300 .200 .100 TOP CENTRE. BOTTOM CENTRE. 0 40 80 120 160 200 240 CRANKSHAFT DEGREES | ||