 Differently, a rigid biplane designed also by teenager Taras Kiceniuk Jr., the Icarus II was a foundation for a modification in Larry Mauro's UFM Easy Riser biplane that started to sell in large numbers; Larry Mauro would power his tail-less biplane; one version was solar powered, called the Solar Riser.Hang gliding record holder Don Mitchell fitted his Mitchell Wing B-10 with a motor, though the pilot still had to use their legs as undercarriage, an arrangement which persisted until he designed the B-10 Mitchell Wing.In 1963, and during his free time, aeronautical engineer Barry Palmer built and experimented with a foot-launched powered hang glider at Bloomfield, Connecticut.