David,
Can you pull a vacuum on the highest point of your system, to try to get the
bubble to expand enough to come out?
Bill Schertz
KIS Cruiser # 4045
----- Original Message ----- From: <daveleonard@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, March 30, 2004 9:54 PM
Subject: [FlyRotary] Re: One step forward and .9 steps back.


I ran it about 5 times today for short periods trying to burp the system but
there is still a sizeable pocket of air somewhere.  If I put 30 PSI of
pressure on the pressurized surge system it will push about a cup of coolant
into the system, but only coolant comes back when the pressure is relieved.
That's probably about 2 cups of air in there somewhere.  I'll just keep
trying to burp the system.

Today I went and ran the system after removing the piece of stuck RTV.
Coolant flow still seems anemic because the sides of the rad barely get
warm.  There was some flow, however.   Coolant temp (measured at the outlet)
would be120 at low RPM and quickly drop to 90 at higher RPM (4000) and go
back up shortly after reducing RPM again.  This says to me that the higher
RPM was generating good coolant flow.

I still need another surge tank to catch all the overflow.