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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Oil Cooling Issues
Date: Thu, 15 Jun 2006 17:37:29 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>


On Jun 15, 2006, at 5:24 PM, Joe Hull wrote:

>> I don't think that you can just remove the thermostat
>> from the oil cooler.  I think that it opens to close
>> off the bypass port and opens the path through the oil
>> cooler, or something like that.
>
> Ok. I took it out because yesterday I flew around the patch with my  
> new and
> much bigger scoop and had higher temps and felt end of the oil  
> cooler and it
> was cool to the touch. So I started to think something wasn't  
> letting the
> oil through the cooling coils/fins. I thought removing the  
> thermostat would
> open up the core - guess I've got that backwards!
>
> When I had my engine being rebuilt last month I flushed the oil  
> cooler with
> mineral spirits and took out the thermostat and tested it in the  
> kitchen for
> correct operation. It opened (grew or shrunk - can't remember) at  
> about 175F
> if I recall. Whatever Haynes says it's supposed to do - it did.
>
> Thanx,
> Joe Hull
> Cozy Mk-IV #991 (In Phase1 Flight Test - 29.1 hrs flown)
> Redmond (Seattle), Washington

Joe, I'm using the same oil cooler and even with my turbo here in FL  
it was adequate. Looks like your thermostat is open all the time?  
When you remove it, you open the flow to go directly from  the IN  
chamber into the OUT chamber without being forced to take the long  
path through the core. If you are removing the thermostat you must  
plug the bypass hole.
Reversing the in and out hoses does not seem to affect the performance.
Buly