This kind of small rc planes are mostly for INDOOR playing ONLY!
comparative advantage:
The advanced AS3X® (Artificial Stabilization – 3-aXis) system built into the Spektrum™ 6-channel ultra micro receiver is what helps give the UMX PT-17 an incredibly solid look and feel in the air. It’s technology that works behind the scenes to help counter the effects of wind and turbulence by combining 3-axis sensing with exclusively tuned flight control software.
I actually fly some of these UMX planes outdoor, it handles quite well even without AS3X like the UMX Champ, in moderate wind it is still safe to fly UMX Radian, in stronger wind I can fly UMX Cub S with confidence, the SAFE system is a new technology to level the plane at all time and it works, I never lost any of my UMX planes I owned, you need to try or see for yourself to believe, FYI, I'm a beginner of rc pilot.