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 engine performance with standard, 50% larger, and 100% larger chokes.

Identifier  ExFiles\Box 56\3\  Scan035
Date  22th December 1931
  
R.M. 61
COMPARISON OF STANDARD, 50% LARGER AND
100% LARGER CHOKES. CHINA CTE UNIT
ALL TESTS C.O OPEN 20G IV EXHAUST SYSTEM C/R 5.74
CAMSHAFT E.57177 110.5°
EX
IN
G
320
CLCE
40.5
44
CARB AS ON 20 G IV
50% LARGER CHOKES AIR VALVE
100% LARGER CHOKES
B.H.P.
R.P.M.
INDUCTION DEPN.
B.M.E.P.
  
  


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