Mailing List flyrotary@lancaironline.net Message #5160
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: evap core air pockets?
Date: Wed, 7 Jan 2004 10:15:02 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Fill up the system with as much coolant as it will hold (this will leave air trapped as I mentioned - but not to dispare) -  fire up the engine and let idle with the radiator cap off.  Let it run for 1 to  1 1/2 minutes, then shut it down.  You will find that the system will now take more coolant.  Do this a couple or three times never running it for over tw0 minutes at a time and refilling the system each time.   
 
Thanks for the procedure Ed.  I had figured this would be one of the times that the EWP would come in handy, since you can circulate water without running the engine.  Since the water won't be heating, and expanding, I should be able to run it until all the bubbles are worked out of the system.  Still hard to believe air will flow downhill to get out of the evap cores though.  
 
I don't have much clearance over the top of the cores, so I don't think I could install anything permanent, but perhaps I could weld a small 1/2" x 1/2" x 1/8" plate to the top of the tank on each core.  I could then drill and tap a 1/8" NPT hole, and put a small plug in it after the system was filled.   Now that I think about it, that might be the high point of my system on the ground, so I might even be able to top off the system through those holes.  Just too many decisions...
 
Rusty (hoping I can make it to the hanger to scope out my new intake- thanks David)  
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