We may have a minor rad breakthrough here. I am talking to Ron Davis
about building some rads for us. He does not know they are for aircraft
yet so don't tell him. He does know they are for rotaries.

We had good communication because  of my racing experience. He was a fan
of Chaparral as a kid back in the 60's :-)
What I will be asking for is 16 inches wide about 20 inches long
cross counter flow rad two pass rad. As per this sketch. Any comments?
any other request. I can get the price down if he feels he can sell more.

This is too big to go under the engine in a Long-Ez.  How about a second
smaller version for us guys with small airplanes.  14 wide by 18 long is
about all you can get in a Long.  I have two 14 x 16 x 1 rads.

Where are they mounted now Perry? Got any pictures?

Bulent Aliev wrote:

Maybe hard points for mounting?

Good point Bulent. Anybody have any suggestions or preferences?
I would think sheet metal flanges along side the tubes would be useful for
drilling mounting and composite duct attachment holes. Little cylindrical stud rubber
isolators from Barry might be nice for vibration isolation mounting. These are
sold by MacMaster Carr at low cost. The A10-041 #8 size (8-32 studs) will carry
seven pounds each in shear and 14 pounds each in compression. These are a 1/2
inch thick and 3/8 inch inch diameter. See the ACRE NL web site for Barry's URL.

For the Long these would have to be on the long ends, so that the width
is no more than 14 inches.

Perry J. Mick
Mick Duckt N7XR
http://www.ductedfan.com

Sounds tough to do Perry. What is working for you now?
Skinny airplanes are always hard to install anything in :-)

Paul Lamar
 
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