i just put together a hobby zone super cub as a christmas gift but it wont quit shorting out if i touch the black box (receiver) it will run and quit run and quit just by barely laying my hand on it works great for a while but then quits and runs any thoughts what the trouble could be? its gettin late and this isnt going to be a very good gift!!!!!!!!!!!!!

Make sure everything is plugged in good and the battery is fully charged (electric speed controllers operate on a cutout voltage and a low battery will mimic what you describe) if you still have problems it would be time to return it to where you bought it.

There have been a number of posts detailing loose crystals. However, it seems that the crystals are soldered in, so it isn't just a case of just pushing the top back in. Some people do that, and add some tape to keep it in place.

A few guys have described how the circuit board had tiny cracks, and that allowed the crystals to work loose. Personally, I'd take it back and get another one. It is a fine electric trainer plane, but does have some issues with the radio system. I've switched mine over to a DX6 system. Rich