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 comparing power output, BMEP, and fuel consumption with an open exhaust versus a fitted car silencer during single-cylinder engine tests.

Identifier  ExFiles\Box 134\2\  scan0027
Date  23th April 1957 guessed
  
BENTLEY SINGLE CYLINDER TESTS.
SHEET 5
V1748.
POWER OUTPUT: EFFECT OF SILENCER, (HIGH POWER HEAD).
HIGH POWER CYLINDER & HEAD TO LEC. 4075.
SINGLE INLET VALVE 1.750" DIA
EXHAUST VALVE 1.500" DIA
COMPRESSION RATIO = 6.17
ZENITH CARBURETTOR (36 M/M CHOKE).
FUEL = DTD 224.
VALVE TIMING I.O. 2°E.{Mr Elliott - Chief Engineer} I.C. 28°L.
E.O. 51°E.{Mr Elliott - Chief Engineer} E.C. 7°L.
BRAKE HORSE POWER
OPEN EXHAUST
CAR SILENCER FITTED
B.M.E.P. (LBS/SQ. IN.)
SP.{Mr Spinney} FUEL CONS. (PTS/BHP/HR.)
R.P.M.
  
  


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