It's never so much how much wind the phantom can handle but more of how much the shell can handle. But here's the kicker on the phantom 4. Those motors look to be mounted in such a way that the motor mounts are essentially the lower and upper shells working as one. Also, for the first time the arms are also helped by this top and bottom motor attachment. So long as that plastic is strong enough, we should see drastic reductions in the stress crack department.