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Great looking aircraft, don't know about the pilot thought {:>)
First thing, Tommy - is just about every one of us flying have been at this
stage with overheating. Considering the OAT it may not be as bad as it
initially seems. Need to have you take a couple of photos with the cowl off
of your cooling system. It looks like you certainly have adequate sized
ducts, but can't tell what is behind each. The fact that your oil temps are
staying that much below your coolant temps indicates to me that your oil
cooling system is probably OK. The oil temp will rise if the coolant temp
rises as the oil also gets heated as well. Once the coolant temps are
brought down the oil temps will probably drop to where you want them without
anything else being done.
While your radiator ducts appear large enough, I can't tell how the air is
captured and forced throught the radiators, so a drawing or some photos of
radiators/ducts would help in the analysis. If the ducts are not pretty air
tight forcing all the air through the radiator, you can lose a lot of your
air's cooling effectiveness. Even a 1 in square hole leakding air can have
a big effect espectially on a hot day.
You didn't mention any coolant pressure numbers (if you have a coolant
gauge) or the rating of your radiator cap in PSI. I would not use less than
an 18 PSI cap, in fact I use a 21 psi cap.
Your loss of coolant does not surpise me given the temps it went to.
My first flight lasted 4 1/2 minutes due to oil temperature going to 240F
(or higher). It took me
several attempt before I got that fixed. Once the oil temps came down the
coolant temps followed without me doing anything else. Looks like your
situation may be just the opposite.
Let me know how I can help.
Ed Anderson
----- Original Message -----
From: "Tommy James" <twjames@healed.org>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, August 01, 2003 5:40 PM
Subject: [FlyRotary] N78TP Pix
> Hi Guys, (and Kathy)
> Here are a couple of 'glamour shots' I'll process some of the 'innards'
> pictures when I get back home. Thanks for the graphics help!
>
> It appears we have a cooling problem (or several). I ran it up to 245
> degrees today on the second flight of the day. OAT read 93. Oil temp
went
> to 217.
> Red EIS light flashing and the adrenalin pumping, we landed without
> incident.
> After cool down it seems we lost about a pint of coolant blown out through
> the overflow tank.
>
> Analyzing
> Tommy James<><
>
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