UMX Radian BNF Basic w/SAFE and AS3XNOW EVEN EASIER TO FLY The UMX Radian ultra micro motor glider became a class favorite by delivering a unique flying experience you simply can't get from any other model. Due to its traditional motor glider design, the Radian is inherently stable and easy to fly almost anywhere indoors in gymnasiums and other suitable spaces, and outdoors in most yards, parks and sports fields. The exclusive Spektrum AS3X technology of its installed electronics