An interesting idea but might I suggest first you go to a local rc club and talk to the members, they might give you a test drive to feel the full experience. The method you are referring to is reminicent of the cox rc airplane days where all you had control of was the rudder. If you are trying to convert a ff model to rc, yes it will be stable but you will have to watch the rudder coupling. I mean to say that the more rudder you put to turn the aircraft the more the plane will want to roll and dive. You will not have the benefit of engine control or elevator to level out. to convert a small aircraft you will need a micro flite pack.build the plane so that you will have room to mount the radio and servo for the rudder near the cg. build mounts for the servo by running hard wood bracing perpendicular in fuse. run a pushrod guide from near the servo to the back of fuselage near rudder. run a 2 56 push rod down the guide and exit the fuselage. the rudder is just a piece of airfoil that is attached with hinges to the verticle stab, you can use ca hinges to attach.