As has been said these are limited to 29mph. I took mine out yesterday despite the wind and in sport mode the fastest I could get it to was 5.5mph. At some points it was going slower. Flying at 90 degrees to the wind direction was "interesting" and got a few wobbles but flying back the bird topped out a 29.2mph. It's quite clear that this is the maximum it'll do so if you try flying in gusts over that you WILL lose.