panzertank-

Sounds like a fun project. You can also get an idea of how it will fly by putting weights on it to simulate the servos and engine, and hand tossing it in high weeds to get an idea of how it will glide, etc. If it seems to be more brick like in flight, enlarge the wings some, etc.

Here is a better choice of servo if you have a couple of extra dollars over the HS-55: http://www.horizonhobby.com/Products...ProdId=JRPS185

I've used a few of the HS-55s and I like the JRs better now. I've run into quality control problems with the Hitechs too much recently.