Not likely that it will get out of range, but it can. One possibility of this occuring would be an inexperienced glider pilot getting too far downwind and not being able to get back to the flying field.

NIK, I have a T-Hawk also, I haven't had as much luck with mine as you had with yours. Stay away from hi-voltage lines, they will cause major interference, currently my t-hawk is down, waiting for 2 new servos after it tailspinned into the ground from radio interference.