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 showing compression pressure curves against engine speed for different inlet valve diameters and types.
| Identifier | ExFiles\Box 179b\3\ img220 | |
| Date | 21th September 1932 | |
| FIG 4 27-8-32 21-9-32 COMPRESSION PRESSURE CURVES EFFECT OF INLET VALVE DIAMETER ON COMPRESSION PRESSURE STANDARD CONDITIONS VALVE TIMING: I.O. 7° LATE E.O. 30° EARLY I.C. 24° LATE E.C. 10° LATE FLAT TOPPED EXHAUST VALVE WITH SMALL INLET VALVE TULIP SHAPED EXHAUST VALVE WITH LARGE INLET VALVE STD "BUZZARD" INLET VALVES 1.850 DIA LARGE INLET VALVES 2.050" DIA COMPRESSION PRESSURE (LBS/□") ENGINE SPEED (R.P.M.) | ||