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 showing supercharged power curves from Bentley single cylinder engine tests with a ramp head.
| Identifier | ExFiles\Box 133\2\ scan0073 | |
| Date | 1st July 1937 | |
| SHEET 9 V1714 BENTLEY SINGLE CYLINDER TESTS SUPERCHARGED POWER CURVES (RAMP HEAD) COMPRESSION RATIO = 6.40 OPEN EXHAUST FUEL - DTD 224 VALVE TIMING (.020 CLEARANCE): I.O. 4°E; I.C. 51°L; E.O. 51°E; E.C. 7°L. (STANDARD BENTLEY) CURVE 1: NATURALLY ASPIRATED (CORRECTED TO N.T.P.) CURVE 2: SUPERCHARGED 1.0 LB/SQ.IN. BOOST. (TEMP = 25°C) CURVE 3: - DO - 2.0 " ( " 30°C) CURVE 4: - DO - 3.0 " ( " 38°C) BRAKE HORSE POWER R.P.M. B.M.E.P. (LBS/SQ. IN.) THE SINGLE POINTS ON THE SHORT DOTTED CURVES REFER TO THE STANDARD CYLINDER HEAD. | ||