Jerry Hey wrote:

Hi Paul,   I'm looking for expert commentary from the members of this
list about the cooling scheme in the attached drawing.   There is
nothing about it that cannot be changed.  In particular I am
interested in hearing more about cooling drag as related to inlet
size.  Are the suggested  inlets too big or too little?  Do I need a
bell shaped lip on the inlets?  How about the shape of the rad
plenum.  As you can see, I have heeded some of the advice you offered
months ago particularly with the exhaust flaps under the stab, which
I have grown to like.  BTW, the oil cooler will be located in the
engine cowl under the drive.       Jerry

Just a few minor improvements in red Jerry. You might want to go up
to 10 by 4 for the openings. The boundry layer bleed space should
be at least two inches below the fuslage skin. When the flaps are closed
the air will bypass the opening.

Paul Lamar

BTW don't seal the aft fuselage completly or you could blow the fabric 
off  if you don't duct the outlet of the rads to the flapped
openings. In other words if you just dump the rad air into the aft fuselage. 
At 100% dynamic pressure recovery the force would be about  100 pounds per 
square foot at 200 MPH. Usually inlet ducts are no better than
about 80% or only 80 pounds per square foot :-)

Paul Lamar
 
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