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Date: Tue, 13 Mar 2001 01:16:26 -0500
To: lancair.list@olsusa.com
From: kenharw <kenharw@swbell.net> (by way of Marvin Kaye <marvkaye@olsusa.com>)
Subject: Re: Oil Cooling the IO-360 Lancair
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Matt,   I do not have a NACA scoop for oil cooling and I have no trouble
with cooling the oil.    I run an IO-360 with 10:1 pistons, and I live
in San Antonio, TX.   It gets hot here!

Key to good oil cooling in my case is the fact that I have two oil
coolers, one on each side of the engine at the rear of the cowled area.
Oil is ran through the left cooler and then through the right cooler
(the coolers are in series as pertains to oil path).  Each cooler is fed
with air coming off the back of the top area between the cylinders and
the top of the cowling.   In order to get enough cooling air to satisfy
both the cylinders and the oil coolers one must enlarge the front air
inlets to the cowling.  I believe mine are either 4 or 4 1/2 inches in
diameter.   I will have to measure them to be sure since it has been
quite awhile since I modified the cowling.  In addition, there are
louvers on both undersides of the cowling near the rear to allow more
exit area.  These louvers are in addition to my enlarging the exit area
of the cowling to start with.  Remember, if air can't get out the bottom
of the cowling it won't come in the top front.

The above system works really great and I don't have any unsightly NACA
scoop coming in the side or top of the cowling.

Hope this helps,

Ken
N15KH

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Please send your photos and drawings to marvkaye@olsusa.com.
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