I must share one as well! I friend spent about a month building a Decathlon with a 26cc gas engine. On the maiden day, he took off and it kept going! Just climbing in huge circles as the wind was pushing it further away with each circle. For a while, we could just hear the gas engine, but not see the airplane it had climbed so high. Never to be seen again. Man, we laughed so hard when he left the flying field with just his transmitter! He laughed as well, thank goodness!! We still laugh about that one