Well, antenna location is the problem, I moved it out of the fuselage and the problem still exists. I'll try putting some space between the rigging wires tomorrow and see what happens.

Bob,
The Waco is a Peter Barth kit. Proctor Enterprises sells it here in the US. If you are interested in the plane, PM me with your email address and I'll send you some construction pictures.

http://www.proctor-enterprises.com/p.../waco/waco.htm