Nix the 46 idea. Both planes will require a 61. The Chipmunk I believe suggests a 46 will fly it. Not so iy will get it off the ground and fly it around is all. The Astrohog has alot of drag. You will need the 61. i saw the GB Chippie fly on a Supertiger 61 and it flew fantastic. My Astro hog will have a Saito 80 on it. Go with a good 61 on both and you will like them.

Mark Shuman