Gary Palmer wrote:

Hi Paul,
        At one of the Forums at Osh on cooling drag and ceramic coatings by the LPE
Zerhbach guys they mentioned that a low pressure area exists approximately 10% of
wing chord aft of the max thickness point IIRC. They recommended extending the
lower cowling to that point and enclosing the exhaust to serve as a form of
augmenter to be able to pull air through the cooling system. This seems like an
excellent idea, and very easy to implement and can enable a minimum exit area size.

Regards.....Gary

Yes I have been trying to talk Tracy into that for quite some time :-)
Well maybe not the augmenter but just the air outlet.

This is a picture looking down inside Charley Airesmans' exhaust augmenter
in his soob powered Variez. Charley uses a very small rad which you can see
down there but he cruises around 60 HP.

Paul Lamar
 
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