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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Oil Cooling Issues
Date: Thu, 15 Jun 2006 16:57:07 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>


On Jun 15, 2006, at 4:48 PM, <joeh@pilgrimtech.com> wrote:

> I've been trying to solve an oil cooling issue for the last 2 weeks.
> Everything I do seems to make it worse:
> 1. I built a flow guide on the prop side of cowling (pusher) to  
> prevent
> back-flow into cowl. Temperatures worse - removed.
> 2. I cut a new hole and fabricated a new exit scoop on the bottom  
> of the
> cowl to add 20" of exit area- Temperatures the same to maybe even  
> worse.
> 3. I created a new oil cooling intake scoop that is 3 times as  
> large as the
> original bring the total oil intake area to about 20sq in. - no  
> change -
> maybe even worse.
>
> So, I know I have plenty of exit and plenty of intake - what gives?  
> AHA,
> must be a flow problem into the oil cooler. I removed the  
> thermostat - just
> sure that it would get better. Took a quick trip around the pattern  
> today
> and it is definitely - WORSE.  How can this be?  Got down after my  
> quick
> trip around the pattern and put my hand on the end of the oil cooler
> farthest from the inlet and outlets - cool to the touch - not even  
> warm!!
> How can that be? The oil temperature is still reading 180 degrees  
> after it's
> been shut down for 5 minutes!
>
> Anyone have any ideas on how the check and clear a potentially  
> clogged $575
> oil cooler?
>
> Joe Hull
> Cozy Mk-IV #991 (In Phase1 Flight Test - 30.1 hrs flown)
> Redmond (Seattle), Washington
>
>

Joe, what kind of oil cooler do you have? Looks like the oil is  
bypassing the core?
Buly