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 the inlet valve lift and piston displacement curve for a 20 HP engine.
| Identifier | ExFiles\Box 5a\5\ 05-page028 | |
| Date | 28th May 1922 | |
| (11) 20 H.P. ROLLS-ROYCE ENGINE: INLET VALVE LIFT & PISTON DISPLACEMENT CURVE. STROKE = 4.50" (NO TAPPET CLEARANCE) VALVE LIFT (INCHES) .30 .20 .10 POSITION OF CRANKSHAFT (DEGREES) 320° 340° T.D.C. 20° 40° 60° 80° 100° 120° 140° 160° 180° B.D.C. 200° 220° 240° 260° DISPLACEMENT OF PISTON FROM TOP OF STROKE (INCHES) 0 1 2 3 4 28-5-22 | ||