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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Temperature control
Date: Mon, 10 Jul 2006 14:08:21 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>


>
> The issue:
> On the ground, cooling stabilizes at 180-190F deg and oil is  
> usually 10 degrees below the cooling with an OAT of 65-70F deg.
> When running with higher OAT (75-85F deg) after about 0.5 hours of  
> moderate taxi runs (up to 4300RPM) the cooling temps reach 212Fdeg  
> with the oil about 200F deg.
>
> The question:
> Can something be done to get lower operating temperatures without  
> redesigning the system?
> Would switching to pure water help and if so by how much?
> Would removing the thermostat help and if so by how much?
> How much change should I expect if I were to do both?
> You guys down south should have a good idea of how best to enhance  
> cooling.
> What are your suggestions?
> Thanks,
> Jim Maher(Dyke Delta)

Hi Jim, looks like on a 90-95F day, you may have problems with  
cooling. The other day I did 3 full power fast taxis total 40 min and  
my WT was 230F and oil 200F. OAT was about 87F. If you switch to pure  
water you are running chance of rusting the engine. You may want to  
use distilled water with Water Wetter from Advanced Autoparts 
(Discount Autoparts).
I'm running without thermostat like ED. My water lines are 1.5"  
aluminum tubing. You'll get the best improvements if you pay  
attention to the shape of your air diffusers, seal air leaks and  
anything to improve the movement of air and coolant through the  
cores. My concern is the Atkins short intake, the size of your TB and  
the size of your coolant lines? Keep us tuned
Bulent "Buly" Aliev
FXE Ft lauderdale, FL
http://tinyurl.com/s5xw8