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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).
Graphs showing the effect of water circulation on overheating for a 19 E.X. Car water system.

Identifier  ExFiles\Box 14\7\  Scan038
Date  2nd July 1930 guessed
  
GRAPH II
EFFECT OF CIRCULATION ON OVERHEATING
19 E.X. CAR
A BACK PRESS CAUSED BY RESTRICTION 15 LBS/SQ"
WATER OUTLET FROM THE CYL: BLOCK RESTRICTED TO 23-.125 HOLES.
TOP WATER TEMP.
ATS TEMP. 20°C
SHUTTERS OPEN. SHUTTERS CLOSED
TOP WATER TEMP. C°
STANDARD
RESTRICTED CIRCULATION.
STANDARD
RESTRICTED CIRCULATION.
ROAD SPEED 75 M.P.H.
CIRCULATION ON PII WATER SYSTEM
RAD: E.79448 6/7 1/2 TUBES.
MEAN BOTTOM WATER TEMP: 67°C
B
RAD: E.79321
TWO RAD OUTLETS.
SINGLE RAD OUTLETS.
RESTRICTION OF 23 .125 HOLES IN OUTLET PIPE.
65 M.P.H.
FLOW GAL/MIN
ENGINE R.P.M.
C
CIRCULATION GAL/MIN
DOUBLE RAD: OUTLET
SINGLE RAD. OUTLET
ENGINE R.P.M. 2500
BOTTOM WATER TEMP. C°
CIRCULATION ON PII WATER SYSTEM AT HIGH TEMPERATURES.
DOUBLE RADIATOR OUTLET.
6" M/M TUBES
7'.5" M/M
4'.0"
23'.6"
26'.8"
  
  


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