Back in 1970 or so I bought a Testor's Cherokee foam and plastic ARF with pulse rudder and powered by a Cox .049. Following my free flight and control line experience, knowing about glide characteristics, I hand launched it power off into the field of tall grass beside the house. The fuselage broke in two and the wing was damaged. I went on to an all balsa plane from magazine plans and with the radio system converted to Galloping Ghost pulse rudder and elevator (and a few survivable bounces) went on to teach myself to fly R/C!