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 power curves comparing different inlet valve sizes for the Phantom engine.

Identifier  ExFiles\Box 31\2\  Scan124
Date  29th August 1933 guessed
  
B.H.P
PHANTOM - POWER CURVES
CURVE 12
COMPARISON OF DIFFERENT
SIZES OF VALVE (INLET)
(2)
(3)
(4)
VALVES BOUNCE
(2) - LARGE VALVE HEAD - E 83906
INLET VALVE DIA - 2.0"
(3) - STD. HEAD E 83538
INLET VALVE DIA - 1.9"
(4) - STD. HEAD E 83538
INLET VALVE DIA - 1.7"
TWO 1 7/8 S.V. CARBS.
R P M.{Mr Moon / Mr Moore}
  
  


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