Not to rain on your parade, but combat eats servos, especially the higher price micros that you'll need so you don't weight your 1/2A bird around. But certainly give it a try if you want, the planes can be done and they can be a lot of fun.

If you are not opposed to it, and want to give it a try, do a search for the MANWIN trainer. It's control line, 1/2A and made of coroplast. Couple of those in a circle draggin streamer is a lot of fun. There are better 1/2A ships for combat, but these are dang near free.