Rolls-Royce Archives
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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 Brake Mean Effective Pressure curves comparing various Cadillac and Rolls-Royce products.

Identifier  ExFiles\Box 13\2\  02-page180
Date  26th September 1934 guessed
  
G.M.C. CORRECTION TO 103 °F.{Mr Friese}
BRAKE MEAN EFFECTIVE PRESSURE CURVES
CADILLAC & ROLLS-ROYCE PRODUCTS

LBS/SQ. IN.
B.M.E.P.
DEGREES
H.P.
R.P.M. (÷ 100)

CURVE LABELS:
SIXTEEN DUPLEX CARB DOWNDRAUGHT 6.49 C/R
BENTLEY
SIXTEEN SINGLE UPDRAUGHT 6.49 C/R
20/25 R.R

TABLE 1:
DURATION
INLET | EX | MODEL | EX. O.{Mr Oldham} | EX. C. | IN. O.{Mr Oldham} | IN. C.
204 | 206 | CADILLAC V.12 | 25° B. | 1° A.{Mr Adams} | 15° A.{Mr Adams} | 39° A.{Mr Adams}
197 | 196 | CADILLAC V.16 | 23° B. | 6° B. | 15° A.{Mr Adams} | 31° A.{Mr Adams}
210 | 210 | LA{L. A. Archer} SALLE LINE 8 | 30° B. | T.D.C. | 11 A | 41° A.{Mr Adams}
213 | 230 | STANDARD 20/25 | 44 B. | 6° A.{Mr Adams} | T.D.C. | 40.5 A
234 | 238 | BENTLEY 3½ LITRE | 47 B. | 11° A.{Mr Adams} | 1.B. | 52.5A.
TIMINGS .020 TAPPET CLEARANCE

RIGHT Y-AXIS:
LB/FT.
LB/H.P. HR FUEL x 100 ÷ AIR x 10
PER CENT (10)
FUEL CONS (0)

LEGEND (Bottom Right):
ENGINE MOD & SERIAL N⁰ | TEST DATE | POWER & ECONOMY | B.M.E.P. CURVES | OBJ CORR.
* 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 - 5.55 C.R.
LA{L. A. Archer} SALLE 5.9 C.R. 240 CU INS 8 CYL.
* G.M.C. CORRECTION 60°F
20/25 5.8 C/R 222 CU. INS LATEST SU CARB
BENTLEY 6.4 C/R DUPLEX CARB. 222 CU. INS.
  
  


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