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Paul,
Far from discouraging, I think your temps are quite
reasonable for the regime of flight you are in. If you don't heat up a bit
during climb, then for sure you have more cooling capacity than needed at cruise
- which is not necessarily bad except from a drag standpoint. The sleeker
the aircraft the higher percentage of total drag the cooling drag
is. My coolant is red-lined at 220F (and I have exceeded that all
the way up to 240F), my oil is redlined at 210F and thus far I have not exceeded
that limit.
John is correct as well, more power will produce
more heat - so again something to cheer about.
Sealing off even small leaks will help considerably
- that is one reason I went with the fiberglass ducts total enclosing my
radiator face and nowhere for the air to go but through the core.
In Any case, sounds like things are progressing
nicely to me.
Ed A
----- Original Message -----
Sent: Sunday, April 10, 2005 1:33
AM
Subject: [FlyRotary] SQ2000 flying
again
I flew the SQ2000 today. The engine is running
great, now that I have a seperate water temp sender for the ECU and another
for the engine monitor. The outside air temp was 80 degrees, and I am very
disappointed with my coolant temps. The water temp hit 205 during the
climb. Temps slowly came back down to 190 once I was in level flight,
and dropped to 170 on short final. Very disappointing. (oil temps were
fine). I am going to seal all the gaps around the radiator first, and
see if that helps. I am concerned that the new ram air scoop I made to
bring in cool air to the throttlebody might be pressurizing the rear of the
cowling, and inhibiting the induction of air through the radiator. I will try
sealing around the radiator first. If that fails to bring the temps down, I
will try removing the ram air scoop and installing a NACA scoop with a hose to
bring air directly to the throttlebody, and not dump it into the low pressure
area of the cowling. If that fails, I think I will take up fishing or
golf.
Paul Conner, 13b powered
SQ2000 in Mobile, AL
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