Russell Kent wrote:
 >
 > > Thomas Parkes wrote:
 > >     Question for cooling system engineers.  I've set my EIS to warn of
 > > coolant temperatures above 220 degrees, but I don't believe I've seen
any
 > > data on the actual boiling temperature of 50/50 water/gycol coolant
under 13
 > > lbs pressure.  What would be a realistic red-line to use?
 >
 > A 50/50 ethylene glycol (C2H6O2) water blend boils at 223 degF under 1

ATM.

  The
 > 13 psi working pressure will raise the boiling point another 40 degF (
approx).
 > 220 degrees (assuming that's accurate) for 13 psi might be fine, but it
really
 > depends on lots of things that are hard to quantify.  Where's the
temperature
 > reading occuring in the coolant loop?  How accurate is the

sender/receiver

system?
 >
 > Russell Kent

You might try making that a 90/10 glycol mix. Much better heat transffer. And
run a 22 pound cap.

Lynn E. Hanover

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.