This is getting more and more popular.
Seen today at SZP for the first Sunday of the month
air fare.

Just mount the rad under the fuse and tilt
it down at the front. I think this is a Soob
powered Rand KR 2.5. With a bit more work
it could be made to look better.

Paul Lamar ...No rotor no motor.

That is a rock catcher supreme.  Never work off dirt.   Jerry


No more so then the P51. A screen on the rad core would not hurt.
His angle was a bit excessive anyway. I think it would have cooled
as well with less angle.

Paul Lamar ...No rotor no motor.

It would certainly need a screen.  My experience is that small planes
such as most of us are building have minimal prop ground clearance
and really pick up the dirt and small stones.  A P-51 prop I would
guess  has several feet of ground clearance.  A few inches can make a
big difference.  Jerry

Today I ran across an old drawing (printed out) you did for me
several years ago with  rad(s) mounted in the fuselage being fed by
scoops under each wing (high wing). The design still stands up well
even after the long passage of time and the evolution of ideas.
Inside the fuselage a large surface area rad is easier (not easy) to
fit. It would be good for single and tandem planes that are very
narrow inside the cowl. Two other advantages would be (1) getting the
rad away from the exhaust (which would also benefit from the extra
room under the engine) and (2) fitting a stock cowl without
modification.       Jerry

Upload it Jerry as I can't find it. Under the wing next to the fuse
is a real high pressure area when climbing out.

Paul Lamar ...No rotor no motor.

Here is a scan. This drawing used to be on the ACRE web site, I
think.  I remember I ran into  problems clearing the elevator torque
tube  when I tried to actually place the rad in my fuselage.  Two 15"
x 20" x 1" rads mounted along each side fed by their own scoops
would solve the torque tube issue.  A fresh look is needed.    Jerry

No file was attached but I found this one. Is this it?

Same drawbacks

1)water pump might not be up to pumping all that fluid back and fourth.

2) hot pipes through the cockpit.

3)lots of ducting to be made.

4) trim change with open or closed cooling flaps.

5) possible loss of elevator authority with cooling flaps open.

Might all be worth it if you have a CG or space under the cowl problem.

Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.