Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Performance curve chart comparing a supercharged and a non-supercharged Graham engine.

Identifier  ExFiles\Box 173\3\  img085
Date  4th April 1934 guessed
  
FIRM: GRAHAM
MODEL 67 & 69
SERIAL Nº
TEST Nº 326-4-5A
DATE
Nº CYL. 8
BORE 3 1/4
STROKE 4
DISPLACEMENT 265.4
COMPRESSION RATIO
FUEL GASOLINE
FOR DETAILS SEE SPECIFICATION SHEET
PAGES 6 & 14 AND LOG SHEET S.C. BOOK. I.
CURVE SHEET - 03
S.A.E. ENGINE TESTING FORMS.
HIGH SPEED MEDIUM POWER ENGINES
MECHANICAL EFFICIENCY PER CENT.
HORSEPOWER AND BRAKE MEAN EFFECTIVE PRESSURE
FUEL LBS. PER B.HP. HR.
THERMAL EFFICIENCY PER CENT.
TORQUE LB-FT
R.P.M
EFFECT OF SUPERCHARGER ON ENGINE POWER AND EFFICIENCY
3 1/4 x 4 SUPERCHARGED ENGINE
STROMBERG CARBURETTER - 5.76:1
SUPERCHARGER RATIO, - 6.72:1
COMPRESSION RATIO
A.C. CLEANER AND SILENCER
3 1/4 x 4 ENGINE - NOT SUPERCHARGED
COMPRESSION RATIO - 6.72:1
NOTE:- THESE CURVES PLOTTED FROM LABORATORY OBSERVATIONS, NOT CORRECTED FOR BAROMETRIC PRESSURE OR AIR TEMPERATURE
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙