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).
Indicator diagram for the 40/50 engine model.
| Identifier | ExFiles\Box 181\M7\ img060 | |
| Date | 24th June 1913 guessed | |
| 40/50 INDICATOR DIAGRAM 40/50 110° CAMSHAFT COMPRESSION RATIO 3.3-1 2000 R.P.M. 77.1 H.P. 13° C AIR TEMP 763 MM BAR. COOLING WATER 80° C I.M.E.P. 91 LBS/□" B.M.E.P. 67.4 LBSb MECHANICAL EFFICIENCY 74% INDICATED VOL. EFF. 84.7% COMPRESSION PRESSURE. 73.1 LBS/□" EXPLOSION PRESSURE. 312 LBS/□" Circular Diagram Text: TDC E.C. 10 I.O. 12° 227° 205° 47° I.C. E.O. BDC Graph Text: 50 I.O. E.C. ATS +10 E.O. I.C. URE | ||