Oh, and by the way, the receiver pictured has 7 channels, then there's a "port" for the battery connection that's labelled "B". You would want to install a power switch between the battery pack and the receiver for easier power conservation.

Futaba is set up so that Channel 1 is Ailerons, 2 is Elevator, 3 is Throttle, 4 is Rudder, 5 is usually Flaps, 6 generally Retractable Landing Gear.... Other radio manufacturers have slightly different channel assignments, but generally the four primary functions are the first four channels.
Dennis-