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Tracy,
So the heater water has been past the
combustion chamber side, but has not yet been down the intake side when I route
it back to the intake of the pump to do it again. I will valve that off and
see what happens.
Ernest,
I just have regular heater hose. Nothing fancy
like silicone.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy
Sent: Thursday, March 03, 2011
1:49 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Coolant
routing
Bill,
First thing to be aware of is that what most builders seem to think of
as the water pump outlet is not the pump outlet, that's the outlet from
the engine block. The pump outlet goes directly to the Combustion chamber
side of the engine at front rotor, passes both CCs then wraps around to the
intake side of the engine, passes back to front on that side then exits through
the "water pump outlet". This helps even out the temp on both
sides of the engine.
The EGT on the Renesis IS about 150 deg. less than the 2nd gens at maximum but
the 2nd gen runs about 1800+ at max power. Still way more than 13 - 1400.
Unlike the 2nd gen where the coolant temp actually goes down a little
bit on the intake side trip, the Renesis picks up a few degrees going past the
exhaust ports.
Tracy
On Thu, Mar 3, 2011 at 11:31 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Tracy,
I am convinced.
I thought that the coolant flowed around from the intake side to
the spark plug side and that was cold to hot side. Please straighten me
out on how it flows and etc..
Ed and Mark,
I have the Renesis. I expected that the EGT from the side
port exhausts would be cooler than the PP exhausts on the 13B and 20B? I
think I expected about 13-1400 degrees with the difference going into the
coolant.
Ernest,
Good idea but I am not certain how difficult it would be to squeeze
that heater hose shut. It is pretty stiff. I could probably reduce the
flow, but I would be concerned about damage if I squeezed it completely shut.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
On Behalf Of Tracy
Sent: Thursday, March 03, 2011
9:09 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Coolant
routing
One
correction. You are NOT bypassing the hot side of the engine (combustion
chambers) You ARE bypassing the radiator and putting the hottest
coolant back into the engine.
Install the valve!
Tracy
On Thu, Mar 3,
2011 at 8:59 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
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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