The E-flite® UMX™ Spacewalker airplane is all about making the pure joy of RC flight When you love flying ultra micro RC aircraft, you tend to see yourA fully assembled ultra micro design that's engineered with the finest materials and equipped with cutting-edge components to deliver best-in-class performance. A fully assembled ultra micro design that's engineered with the finest materials and equipped with cutting-edge components to deliver best-in-class performance. The E-flite® UMX™ Spacewalker airplane is all about making the pure joy of RC flight possible within the serenity of small spaces—even in your own backyard.