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From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
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Subject: Coolant routing
Date: Thu, 3 Mar 2011 08:59:17 -0500
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I have a heater hose connected from the stock outlet from the rear iron and
the other end of the hose is connected to the inlet to the water pump
housing.  I don't currently have a heat exchanger in this hose nor do I have
a valve to shut off the flow of water.  I assume that it is flowing full
bore any time the engine is running.  5/8 inch hose.  Naturally this water
is bypassing the hot side of the engine as well as the radiator.
I would like some opinions as to what effect this might have on my cooling
temperatures.  Has anyone done this, then installed a valve to shut off the
flow and seen the effect?
I have a valve, but didn't want to put it in till I design the rest of the
heater system.
What say ye?

Yesterday morning, OAT about 70, water temp about 170 when I took the
active, climbed to about 205 getting to pattern altitude, then cooled to
about 199 as I went around the pattern.  I left of a little sightseeing trip
got up to 2500 (low clouds) flew over the house, (the wife heard me coming
and ran outside..so much for thinking it was quiet!  She said it sounds like
an airplane on steroids. I take that as a complement)

The temp seemed pretty stable around 200, but it did climb to 210 one time
for a short period for no reason that I could figure then came back down.
EGT I thought was pretty high, around 1600.  Mixture about two bars above
the midpoint.

Bill B