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Date: Thu, 15 Jun 2006 16:41:19 -0500
From: Dennis Haverlah <clouduster@austin.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Oil Cooling Issues
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Is your oil cooler at an angle where air could be trapped in the high end? 

Dennis H.

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
>
>
>
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