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 of Indicated Horse Power and other performance metrics for the 3 1/2 Litre Bentley engine.
| Identifier | ExFiles\Box 133\1\ scan0206 | |
| Date | 28th November 1934 | |
| 3 1/2 LITRE BENTLEY C 72 FIG. I INDICATED HORSE POWER INDUCTION SYSTEM: 1 3/8 S.U. CARBURETTERS AND STANDARD INDUCTION PIPE. EXHAUST SYSTEM: STANDARD TEST BED SYSTEM CYLINDER HEAD: STANDARD 3 1/2 LITRE BENTLEY HEAD INLET VALVE: 1.400" DIA EXHAUST VALVE: 1.500" DIA COMPRESSION RATIO: 6.4 FUEL: D.T.D 224 VALVE TIMING: I.O. 4°E.{Mr Elliott - Chief Engineer} E.O. 51°E I.C. 51°L. E.C. 7°L WATER TEMPERATURES: INLET 78°C OUTLET 85°C OIL TEMPERATURES: INLET 80°C INDICATED POWERS: ① CUTTING OUT CYLINDERS (—) ② STRAIGHT MOTORING (---) LEFT Y-AXIS: MEAN EFFECTIVE PRESSURE RIGHT Y-AXIS: HORSE POWER X-AXIS: R.P.M. GRAPH LINES: INDICATED POWER AND I.M.E.P. ① ② BRAKE HORSE POWER AND B.M.E.P. STAMPED TEXT: EPD / 28.11.34 | ||