Does anyone know of a company that sells any type of RC crop dusters such as Agwagons or Piper Pawnees? I would prefer ARFs.

Only ARF I know is no longer made and that was an AgWagon by Kyosho

http://www.teamduster.com/pages/1/index.htm

Duane Habets designed an airtractor with a 92" wingspan and sells it as a kit for $425. The fuselage is al fiberglass and the plug in wings and tail sufaces are balsa sheeted foam cores.
You can call him at (406) 278-3380.

I ordered plans to build a 40-size Agwagon from RCM (8 bucks + 8 bucks shipping).

The plans call for Dubro 3" wheels (!). Looks darn huge to me.

From the pictures of the actual full-size aircraft, they look rather small? Anybody have an idea what scale tires would measure?

Thanks
Zipperneck