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I may have misstated as the radiator gets hot, the hoses are hot and the overflow tank is hot so I think I have proper flow. Very quickly after shutdown, the top of the radiator where the fans are drawing directly through, it is cool. If the fans are turned of, it is hot. My point was more that the fans seem to be cooling this part of the duel pass radiator fine. Sorry for my lack of clarity....it all starts to run together after a while.....
I don't have a Schrader valve, I "burp" the system with the AN fitting from the top of the engine port that leads to the pressure tank.
Chris
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From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Ernest Christley [echristley@att.net]
Sent: Wednesday, March 07, 2012 11:09 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Ground Cooling
Chris Barber wrote:
Again, I may be creating a problem that does not exist since this is all
fretting about stagnant air on an engine that has a load on it on the
ground, but I do wish to try to best understand it better.
From earlier:
I have two fans pulling air through the heat exchanger and the radiator area
where the fans are is cool to the touch with the fans on right after
shutdown.
If the engine is hot after a run, but your radiators aren't, you definitely have a problem. I'm using an electric water
pump, allowing me to play around with cooling rates a bit. For my tuning runs, I would have a blower on the cooler
intake, insuring airflow across the radiator. After shutdown, I would then turn the water pump off for a bit and let
the water in the rad cool. Switch the pump back on, and watch the thermostat. It took a fairly long time to create a
5* dip as the cooled slug of water reached the temp sender.
If you get out of the plane after hitting 200* water temps and put your hand on the radiator right after shutdown...I
would say you don't have engine heated water going through the rad.
--
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