I have had a few problems with the beaver, it flys with a 12X7 prop with the 32 motor and 3S 4270 battery. I have had lots of neat flights setting flaps to full with an 6-8mph headwind it almost stops in mid air and lands gently. I must have damaged the elevator putting it in the truck. I did a pre-flight and all looked OK. Once in the air after a few minutes it began to spin, I thought one of the flaps had come loose and retracted them, it still went in lawn dart style, I managed to cut the prop and land such as I could in a corkscrew. It broke the motor mount free and bent the wheel struts which can be straightened by removing the and using a vise. The elevator wire had broken through the plastic skin with the neat ribbed surface. I'll have it flying in a day or two. Got over 40 flights on it so I can't complain too much. Check the elevator before take off, pretty flimsy design. One sie up and the other level.
Hope this prevents anyone from having the same problem.
Jay