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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 plotting specific fuel consumption against BMEP for a C.15 unit at 4000 RPM, comparing a standard cylinder head with an LEC 5222 head.

Identifier  ExFiles\Box 106\5\  scan0176
Date  5th January 1936
  
C.15 UNIT
B.V. 99
CONSUMPTION LOOPS AT 4000 R.P.M.
① CYLINDER HEAD LEC 5222
② STANDARD CYLINDER HEAD.
NO EXHAUST MANIFOLD NO DOWNTAKE PIPE
OTHERWISE CONDITIONS AS ON BV.97
SPECIFIC FUEL CONSUMPTION (PTS/B.H.P./HR)
BMEP (LB/□")
MTHS{Reg Matthews}
5-1-36
  
  


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