the t-rex is very stable, I have hovered it with 25kms/hr wind.... hard to control though..... to fly ff, nose in and 8's I fly maximum with 15kms/hr, you just have to be careful because flying FF with wind makes the heli go up or down suddently sometimes, watch out...... but it's possible and once you get used, when you fly with 5-10kms/hr wind will make it a joke.