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 showing the power increase due to lower depression in the induction pipe for a 20hp engine.

Identifier  ExFiles\Box 19\7\  Scan105
Date  30th March 1927
  
20HP POWER INCREASE DUE TO LOWER DEPRESSION IN INDUCTION PIPE
ENGINE No 11-GII.
COMPRESSION RATIO = 5.45 to 1.
OPEN EXHAUST.
CURVES CORRECTED TO N.T.P.
B.H.P.
STD. 20HP CARB.
ZENITH TRIPLE VENTURI
HORIZONTAL CARB.
TWO ZENITH T.V.H. CARBS.
INDN. PIPE DEPN.
STD. 20HP CARB. ZENITH.
TWO ZENITHS.
BRAKE HORSE POWER
INDUCTION PIPE DEPRESSION (INCHES OF MERCURY)
R.P.M OF ENGINE.
30-3-27
1
  
  


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