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.

Paul Lamar

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.

Paul Lamar

Paul,

Bill Freeman wrote:

I would suggest a rubber donut mount  for simplicity and low weight.
Basically a 3/4" or
so short pin on the rad and the donut sits in a 2" socket (pipe with an end
welded on?)
My Honda (89 Accord) uses them on the bottom, looks really simple, probably
pretty cheap and
no rigid mounts to crack the rad.  Made the mistake of rigidly mounting my
oil cooler to
one flange years ago.  After the flange was welded back on, I picked up both
flanges and
rubber mounted the whole thing.  Been fine for about 700 more hours.

Bill

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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