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).
Blueprint graph showing the power curves for a Bentley 'Y' engine under different exhaust configurations.

Identifier  ExFiles\Box 97\3\  scan0048
Date  13th February 1939 guessed
  
BENTLEY 'Y' POWER (CUT-OUT)
S.75
B11 N°1. UNIT
CYL.HEAD FW1922
PISTONS P.446
(.470 RAISED DOME)
CR{Mr Cra???ster / Mr Chichester}=8:1
(.050 GASKET)
'L' STD INDN. SYSTEM
CAMSHAFT EX4752
TIMING A I.O. 5° B.T.D.C.
I.C. 43° E.O. 43°
E.C. 4° B.T.D.C.
① OPEN EXHAUST
② STD 'B' EXH. SYSTEM
③ C.O. OPEN
④ EXPTL. EXH. SYSTEM. (DOUBLE MANIFOLD EB4092)
⑤ S.C.O. OPEN
B.H.P.
R.P.M.
B.M.E.P.
  
  


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