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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).
Chart detailing the performance of Ethylene Glycol coolant in a 2-row staggered tube system.

Identifier  ExFiles\Box 149a\2\  scan0301
Date  11th February 1931
  
CHART No. L 421 A
ETHYLENE GLYCOL
2 ROW STAGGERED
TUBE TYPE 23/5/16 | 24/1/37 | 65/06 | 15
1 1/2" TUBE PITCH
FRONTAL AREA = 1 sq ft
COOLING SURFACE 19.9 sq ft
FT. RUN TUBING 16.0
WT. OF TUBING LBS
CONSTANT AIR 990 CUBIC FT. | MIN.
CONSTANT LIQUID 2.92 FT. | SECOND
LIQUID 74.2 LBS | MIN FT. OF WIDTH AND
182 °F MEAN TEMP. (DENSITY AT 190° ABOUT 1.08)
LIQUID VELOCITY FT. | SECOND
2 4 6
(Tube Diagram) 1.5", 1.5", 1.3"
(Left Y-Axis) AIR PRESSURE INCHES OF WATER, 5, 10, 15
(Right Y-Axis) B.TH.U.S. | HR. | SQ FT COOLING SURFACE | °F TEMP. DIFF., 10, 20, 30
(Bottom X-Axis) AIR FLOW CUBIC FT. | MIN. | SQ FT FRONTAL AREA, 500, 1000, 1500
(Graph Text)
MEAN OF TRIALS (421, 422) AND 423
AIR PRESSURE
LIQUID RATE
AIR RATE (CALC.) AT 3.75 FT/SEC
LIQUID VELOCITY
AIR RATE
(Faint Vertical Text) CHARTON ENGINEERING WORKS
(Bottom Right) 11/2/31, modified 20/2/35
  
  


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