The alternative to a filter is to do a simple bench check of a radiator/evap
core for static flow rate (time to pass a gallon or 5 of water) when it is
"new" or "known to be clean-free of junk", then, after some ground running,
remove it and flow check it again - if not trashed up, and use distilled
water and good liquid, no real reason to have a filter installed.

David
----- Original Message ----- From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, February 28, 2005 2:41 PM
Subject: [FlyRotary] Re: Filterr or not to Filter: [FlyRotary] Re: FW:
Cooling system update


Ed,
I'm with Tracy (use high quality glycol & distilled water), except for
some possible RTV that might break free and get stuck in one or more of
the radiator tubes.  Seems a good backflush would remedy that.  Next
time I have my cooling system apart I might take a peek inside the
radiator and see if there is anything blocking the tubes.  Corrective
action would depend on what I find.  It wouldn't take very many blocked
tubes to push some of us over the edge.

Mark S.


Perhaps we could fashion a quickly removable filter and patch it into
various systems for a while just to check what it picks up.
Like, I wouldn't have thought it possible to block up a whole damned
radiator ... Jim S.




Ed A