You might start here for a full description of this plane:
http://www.top-flite.com/airplanes/topa1000.html

Says that a 25 to begin with and later a 40.

My best asvice before you go spending a lot of money on this that you use your TD 049 and try something like a simple sheet balsa plane for the TD. Simple to build and less outlay than the ARF. Check your PM.

Robert