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 E.A.C. and Hispano inlet valve lift diagrams against crankshaft degrees.
| Identifier | ExFiles\Box 72\4\ scan0158 | |
| Date | 12th March 1924 guessed | |
| E.A.C & HISPANO VALVE LIFT DIAGMS. COMPARED. INLET VALVES. .50 .40 .30 .20 .10 CRANKSHAFT DEGREES. 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 E.A.C. HISPANO E.A.C. REDUCED TO SAME LIFT AS HISPANO. BOTTOM CENTRE | ||