Thanks Tianci. My mate reckoned the numbers didnt seem right compared to other tests I've done with other props. So I stuck to the 4.7 x 4.7 APCe for our club picnic yesterday. My mate Murray turned up with his 3S powered FJ and I whipped his butt on every pass....but he did fly for about 5 minutes longer than I did. I've removed the wing tip pods from mine and cut down the fins by an inch. To much fun flying this awesome piece of foam.