You could mount the rad under the right wing like this.
Outlet on the bottom. Any shape rad will work. The thinner the
better. No scoop... no duct work at all. By just changing the
mounting angle slightly you can increase and decrease the cooling
effect. The aft part of the rad can be in the wing. Or you could do
it under the fuselage just ahead of the landing gear. That makes the
plumbing simple. I guarantee it to work. It uses the Kays & London
wedge shaped diffuser.

I know the cosmetics are awful in this example but you
could clean them up.

Perry has had a lot of problems getting that oil cooler to work.
Could be his ducted fan.

Paul Lamar

How about this variation? Hinge the whole rad at the rear and use the
whole rad like a cowl flap? You could close in the sides
with wedge shapes. You would have to use a two-pass rad so
the hoses come out the rear so they don't have to move much
but do have to flex.

Perry

If the air comes from the left that is exactly what I had in mind.
If the air comes from the right there is a lot less incentive for
the air to go through the rad.

Paul Lamar

"Jeffery J. Andre'" wrote:

Perry,

What will that type of arrangement do to the stall characteristics of your
main wing?  My understanding of canards (I'm planning to build one and have
been studying them a good bit) is that the reason you can't put flaps on the
main wing to slow down the landing speed is because you can't increase the
lift/drag on that wing without doing the same to the canard.  This produces
a condition where the main wing will stall before the canard resulting in
some pretty nasty behavior.

It looks to me like this kind of radiator configuration, while it looks like
it would be excellent from a cooling management standpoint, would also
behave a lot like a flap being deployed.

What am I missing here?

Kindest Regards,

Jeff Andre
Raleigh, NC

I think you mean  "you can't increase the max lift on that wing"

As far as the drag on the rear wing is concerned that has little to do with
it IMHO. I could be wrong. 

The problem with flaps is they move the position of the center of lift 
forward and increase the max lift demanding much more max lift from the canard. 
That could happen with large arm pit scoops. The Beach Star
Ship got around this problem by sweeping the canard and its center 
of lift forward.

I don't think mine or Perry's idea would result in much, if any, increase in lift,
on the rear wing.

Large amounts of asymmetrical drag could be a problem however.

It would be best to mount the rad under the fuselage to minimize asymmetrical
drag or use two rads. One on each side.

Paul Lamar


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