rc outlaw I think you may be onto something there. Well I checked everything out and found nothing wrong. The battery had a good charge, both tx and rx. I screwed the servos into a board and held it against a lawnmower engine along with the receiver to provide vibration and could not reproduce anything that happened yesterday. Something did occur to me. The windy day we flew, I noticed that the wing had slipped back a little. My instructor was in the clubhouse looking for a new tx and I forgot to mention it. I just added a couple more rubber bands and realigned it. I think that maybe my wing mounting technique is suspect. I never thought of this before but I have been going in one direction with the rubber bands (always back to front). I was thinking this may be putting a constant rearward pulling force on the wing. If it were to slide back, the wing incidence may be changed enough that a loop might occur. If a loop does occur, the problem could magnify itself because the force generated in the loop could would act to separate the wing from the fuse and cause a release in tension creating an even more rearward movement of the wing. What do you think about this theory? Is it possible? Or is it just plain crazy?