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 inlet valve displacement against piston displacement for 'Hispano' and 'E.A.C.' models.
| Identifier | ExFiles\Box 72\4\ scan0155 | |
| Date | 12th March 1924 guessed | |
| INLET VALVE DISPLACEMENT. ON PISTON DISPLACEMENT BASE. TOP CENTRE .50 .40 .30 .20 .10 0 BOTTOM CENTRE STROKE PISTON DISPLACEMENT FROM IN CENTRE. CURVE LABELS: HISPANO E.A.C. X-AXIS VALUES: 0, 20, 30, 40, 50, 1, 60, 70, 80, 90, 2, 100, 3, 110, 4, 120, 130, 140, 150, 5, 160, 5.5, 225° | ||