Want a quick and dirty cooling system that is easy to
fab and is not a lot of drag? No room under the cowl?
Try one of these. Type A would be suitable for a pylon
airplane like the Coot and B will work on almost
anything. 

These ideas incorporate all I have learned
about angled rad cooling. Thin, large area rads
are used to pass a lot of air at low airspeeds. 

The flat plate splitters 
are in lue of a more complicated curved diffuser
duct. The outlet ducts are non-existent. Hot air
is merely dumped out into the slipstream.
I doubt you would be able to measure a drag
difference with or without the outlet ducts. 

I also doubt one could come up with 
a simpler cooling system.

These systems are ideal for a low and slow airplane
like the V6 STOL or the Coot.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org