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Hi Bill,
Good to see you have a good flight.
Can't help on the difference the heater makes in coolant temperature. I do have a similar set up - but, just never paid any attention to the difference it being on might make in the coolant temps. My heater core is quite small and doesn't seem to put out much heat (but then I don't have a thermostat - so coolant temps are cool in the winter).
One thing I would suggest, I put a single cut off valve to control the heat - and to turn off the system if it sprung a leak. I later realized that to take care of any possible leak I would need likely need two cut off valves at the FW to complete cut off both inlet and outlet of core from the coolant system.
Depending on how hard you were pushing the engine 1600F sounds about right for EGT.
You didn't say, but I presume you have a thermostat?
Ed
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From: "Bill Bradburry" <bbradburry@bellsouth.net>
Sent: Thursday, March 03, 2011 8:59 AM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Coolant routing
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
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