Neil A. Kruiswyk wrote:

Paul,

    That would be a tricky location for a rad.  Not a bad location, just
tricky.  There would be a fair bit of moving controls rods and cables.  I
would also want an inner liner for the hot air so as not to heat the
fuselage skins.  Prepreg carbon (or glass) is wondeful stuff but I would
have concerns about re-heating it repeatedly.

Inner liner is a good idea. 

The first time I did this it surprised the heck out 
of me. Measure the temperature of the air coming out of the rad
at 100 MPH. You will be blown away.(Especailly if your standing 
out side the airplane :-)) It is only a few degrees
above the air going in. So much volume of air is going through there
the heat is carried away by only a few degrees increase in temperature.

Heat soak after you shut it down will be a bigger problem.
Put some large diameter electric hot rod fans back there to cool it
when shut down or not moving. Also a vent above the rad. Lots of guys
put those on their cowling.

    Beefing the aft fuselage where the holes are is an absolute must and I
would go alot bigger on the bid (layups).  Lancairs are known to crack or
break in that area if subjected to violent attitude changes i.e., ground
loop or snagging a wing tip on landing.

Neil

You could move the holes further forward with a manometer test in that
area. That low pressure area probably extends down and beyond the
leading 
edge of the stab.
 
PL

The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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