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).
Performance graphs and valve timing diagram for a Hispano engine.
| Identifier | ExFiles\Box 72\4\ scan0160 | |
| Date | 10th March 1924 | |
| HISPANO ENGINE Left Graph: MECH. EFF % HORSE POWER MECH EFF I.H.P. B.H.P. ROTATE ENGINE ENGINE R.P.M. Valve Timing Diagram: T.D.C E.C I.O 15° 225° I.C 45° B.D.C E.O 40° 220° Right Graph: EXPLOSION PRESSURE LBS/sq in I.M.E.P AND B.M.E.P LBS/sq in COMPn PRESSURE LBS/sq in VOL EFF % I.M.E.P. B.M.E.P. AVERAGE PEAK EXPLOSION PRESSURE COMPRESSION PRESSURE INDICATED VOLUMETRIC EFFICIENCY ENGINE R.P.M. Bottom Text: FIGURES OBTAINED WITH ORIGINAL R.A.E. INDICATOR | ||