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).
Comparison graph of Brake Mean Effective Pressure (B.M.E.P.) curves for Cadillac and Rolls-Royce products.
| Identifier | ExFiles\Box 102\5\ scan0166 | |
| Date | 13th May 1935 guessed | |
| G.M.C. CORRECTION TO 103° F BRAKE MEAN EFFECTIVE PRESSURE CURVES CADILLAC & ROLLS-ROYCE PRODUCTS AXIS LABELS: Left Y-Axis: B.M.E.P., LBS/SQ. IN., H.P., DEGREES Right Y-Axis: LB/FT., LB/H.P. HR. FUEL X 100 - AIR X 10, PER CENT (10) Bottom X-Axis: R.P.M. (÷ 100) CURVE LABELS ON GRAPH: SIXTEEN DUPLEX CARB DOWNDRAUGHT 6.49 C/R BENTLEY SIXTEEN SINGLE UPDRAUGHT 6.49 C/R 20/25 RR MAIN TABLE (BOTTOM CENTER): TIMINGS .020 TAPPET CLEARANCE. HEADERS: DURATION, INLET, EX, Ex. O.{Mr Oldham}, Ex. C., IN. O.{Mr Oldham}, IN. C. CADILLAC V.12: 204, 206, 25° B, 1° A, 15° A, 39° A CADILLAC V.16: 197, 196, 23° B, 6° B, 15° A, 31° A LA{L. A. Archer} SALLE LINE 8: 210, 210, 30° B, T.D.C., 11 A, 41° A STANDARD 20/25: 213, 230, 44 B, 6° A, T.D.C., 40.5 A BENTLEY 3 1/2 LITRE: 234, 238, 47 B, 11° A, 1 B, 52.5 A KEY TABLE (BOTTOM RIGHT): HEADERS: ENGINE, MOD & SERIAL N°, TEST DATE, POWER & ECONOMY, OBJ. CORR., B.M.E.P. CURVES CURVE DESCRIPTIONS: CADILLAC 452 CU. IN. V-16 DUPLEX DOWNDRAFT CARBURETTERS - 6.49 C/R CADILLAC 452 CU. IN. V.16 STD. UPDRAFT CARBURETTERS - 6.49 C/R CADILLAC 368 CU. IN. V-12 STD. UPDRAFT CARBURETTERS - 5.50 C/R C.M.C. CORRECTION 60°F LA{L. A. Archer} SALLE 5.9 C.R. 240 CU. INS. 8 CYL DUPLEX CARB. LATEST S.U. CARB. 20/25 5.8 C/R.{Sir Henry Royce} 222 CU. INS. BENTLEY 6.4 C/R.{Sir Henry Royce} DUPLEX CARB. 222 CU. INS. STD. DUPLEX CARB. ONE CARB. BUILT DUPLEX | ||