that happened to me, i got there first thing in the morning before the sun got up to high with a new 4*40 to trim it out and the motor was running perfect and no wind took off and about 30 ft off the ground i realized i forgot to plug in my wings,,,,,, so the plane bit the dirt, ripped the wings off and punched a few holes and when i get home my gf asked me how do i like the way the plane flys?? a real BAD DAY;;;;;;;;;;;;