Hand launching powered models for can be a problem for some and other a non-issue. Those who have, bad throwing arm, nerves, coordination, worry, safety, or whatever need help. The safes way for those with difficulty is to have a fellow flier launch their model. If you don’t have this option other methods may suit your need. The bungy system, “Hai-Lee has addressed this method many times. I have another Idea that may work but have found no mention of it. What if you were to mount a holding seat on the top of a pole stick having spring (fishing pole) or maybe springy water pipe may work. This type of device could be held in hand and whipped forward. Of maybe stuck in the ground and pulled back and released, “plane launched”. Probably, another hair brained idea of little value. Just want to get others opinion on this subject.