flyrotary@lancaironline.net Mailing List Archive

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

--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html