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 the valve areas of Sleeve and Poppet valves for a 3.500 bore engine.

Identifier  ExFiles\Box 133\2\  scan0170
Date  14th April 1936 guessed
  
VALVE AREAS - 3.500 BORE ENGINE
DURATION OF VALVE OPENING 230°
______ SLEEVE VALVE
----- POPPET VALVES (LEC 3855)
IN 1.600 DIA
EX 1.400 DIA
VALVE AREA - SQ. INS
2.5
2.0
1.5
1.0
0.5
0
INLET
EXHAUST
OPENING
CLOSING
DEGREES ON CRANKSHAFT
30
60
90
120
150
180
210
FIG. 1
HS{Lord Ernest Hives - Chair} 2064
  
  


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