Jerry Hey wrote:

I finished the swirl pot yesterday.   All that remains for the
cooling
system is the overflow tank which I think I will make out of

welded

aluminum.  Is there any problem with having it fill and empty

from

the
bottom?    Jerry

Nice photograph Jerry. What is that oil cooler doing near the
firewall?

That is where mine was originally. It did not work!
Ian RV6A.

I'll reserve judgment until I see what the scoop and duct look like

:-)

Paul Lamar

I am planning to pipe the air in from the front of the cowl,

probably

3" round inlet.      Scat to intake plenum.   Air exhausts  at

bottom

of cowl.

I would welcome anyone's recommendations for fitting an air cleaner

and

intake.

    Jerry

That sounds good Jerry. Be sure and make the transition from three inch
round SCAT to the cooler bell shaped.
Here are the coordinates again for the new guys.

Paul Lamar

Jerry,
I don't think that 3" is nearly large enough.  You will probalby need

about 25 sq. in. of intake area (according to Fred Morino) for the oil
cooling.  The 3" is a really small duct.  Take a look at the following
numbers:

3" = 7.069
4" = 12.57
5" = 19.63
5.5" = 23.76
6" = 28.27

FWIW, I'm not flying yet.

Ken P.

Ken Powell
kenpowell@aristotle.net

Good point Ken. I missed that.

Paul Lamar

My original oil cooler location (Earl cooler) was within 12" of the firewall
and with the initial 3" dia duct temps went to over 240F on first flight.
Later and even with a better plenum and  5" dia duct cooling was marginal.
Could have been the oil cooler or the location or a poor plenum, but I did
not get effective oil cooling until I went back to the stock mazda oil
cooler and moved it up under the spinner.  FWIW

Ed Anderson

I think Ed gave up too soon as his transition from round duct to rectangular
cooler was less than optimum. Also I suspect his cooler was too close to the
firewall to allow a free flow of air out the back side. I am still not convinced 
that a configuration like that can not be made to work. I agree with Ed that 
it could also have been the Earl's oil cooler as they have a bad rep.

Here is a set of curves on Earl's oil coolers. I need to convert some of these
numbers and compare them to the new Stewart Warner oil cooler data we now have.
This will give us some useful air side clues.

Chuck Dunlap had his stock cooler on the firewall with a straight metal duct in from
the stock cowl opening. Seemed to work. How is it working these days Chuck? 
Are you happy with it?

Paul Lamar
 
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