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 diagrams and performance curves for an E.A.C. engine, comparing various exhaust manifold configurations.
| Identifier | ExFiles\Box 72\4\ scan0344 | |
| Date | 27th March 1924 | |
| INDICATOR DIAGMS. E.A.C. ENGINE [3 E.A.C. II] 4.6 COMPRESSION RATIO. RR.CH. CARBURETTER USED WITH SEPARATE STRAIGHT EXH. PIPES. TO EACH PORT SUMMARY 110° CAMSHAFT R.P.M. 2000. INDICATOR SPG RATING 91.5 EXPLOSION PRESS. 406 lbs/□" DYNO LIFT - 42.5 lbs B.H.P. 118.7 B.M.E.P. - 100.5 lbs/□" I.M.E.P. " 125 lbs/□" BAROMETER - 740 m.m. AIR. - 15°C. INDICATED VOLUMETRIC EFFCY. 98% Graph Text: lbs/□" GAUGE ATMOSPHERIC SPARK ADVANCED LIGHT SPRING DIAGM. OF EXHAUST & SUCTION STROKES AT 2000 R.P.M. COMPRESSION PRESSURE DIAG. NOT FIRING. COMPRESSION CURVES FROM INDICATOR DIAGMS. INDICATED VOLUMETRIC EFFICIENCY % COMPRESSION PRESS. lbs/□" INDICATED VOL. EFFCY. COMPRESSION PRESSURE MEAN EFFECTIVE PRESS. lbs/□" MECHANICAL EFFICIENCY EXPLOSION PRESS. lbs/□" I.M.E.P. B.M.E.P. MECH. EFFICIENCY EXPLOSION PRESSURE HORSEPOWER CURVES FOR FOUR TYPES OF EXH. MANIFOLDS B.H.P. R.P.M. SEPARATE EXH. PIPES TO EACH PORT TWO SEPARATE MANIFOLDS ONE TO 3 CYLS. LARGE DIAMETER MANIFOLD STANDARD MANIFOLD | ||