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Subject: RE: [FlyRotary] Oil Cooling Issues
Date: Thu, 15 Jun 2006 17:03:10 -0500
Message-ID: <15839C662A43B844B6E393DBFEAA90BF0478C437@dalexc101p.prod.fdic.gov>
Thread-Topic: [FlyRotary] Oil Cooling Issues
Thread-Index: AcaQvVR+p4naruWcR0mqO/b/lPSt5gACVzRQ
From: "Rogers, Bob J." <BRogers@FDIC.gov>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

I used Pacific Oil Cooler Service to overhaul/clean/inspect my Mazda oil
cooler and they did a great job.  If you tell them it is an automobile
oil cooler and not an aircraft oil cooler, they will charge a lot less.
I paid $112 in 2001.

Here is a link to their website.
http://www.oilcoolers.com/overhaul_service.htm


-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of joeh@pilgrimtech.com
Sent: Thursday, June 15, 2006 3:49 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Oil Cooling Issues

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?=20

Joe Hull
Cozy Mk-IV #991 (In Phase1 Flight Test - 30.1 hrs flown)=20
Redmond (Seattle), Washington


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