BTW If you have a composite airplane like the
Lancair and you want to take advantage of the
low pressure area under the horz stab for radiator
air outlets don't forget to beef up the holes.
The sides of the fuselage in that area provides material
that carries a large sheer load due to the downforce on the
tail.

Put a doubler consisting of five or more layers of
bi-di carbon fiber epoxy around the holes at least two or
three inches wide both inside and outside. Radius the 
corners of the holes with a two to three inch radius.

This is not a problem with tube frame fuselages like 
the Christavia and Wagabond as no tubes need be cut.

I like this spot for the air outlets even better than
the P51 type outlet. Not to mention that they would 
be much easier to fabricate. 

Be aware however there is a possibilty that movable 
radiator air outlet flaps back there could 
affect the pitch trim.

Paul Lamar
 
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