Paul,

Pic 1 is proposed scoop shape

Pics 2,3 are std. install with 9" from back of prop to front of rad.

Pics 4,5 are rotated 90 deg. to get more distance from prop flange but
also increases width of difusser.

Im not sure which is more important

I will build cowl flaps and one advantage of pics 4,5 install is option
of separately controlled cowl flap for oil cooler

My climb out speed is more like 65 to 80 with top speed of 155

Thanks again for your time,

Geir

Pic 4 & 5 is the way to go as the oil cooler can be mounted side
by side and it is a two pass rad with inlet and outlet at the back.
You might want to use 30% opening area because of the slow
climb speed.

BTW what are the dimensions of the rad core?

I love the idea of separate cowl flaps for oil and water with a common
diffuser.

Not only are the flaps individually adjustable but the air pressure
one or the other core gets depends on the individual flap settings
if you get my drift. If you close the water flap the oil cooler
gets max air pressure and vice versa to look at the extreme case.
This is a great idea and will work extremely well.

You are doing a great job on this airplane Geir.

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.