With the advancement in technology, it’s no longer surprising how cutting edge aircraft designs would be. Case in point: the Boeing Condor unmanned aerial vehicle. Designed to be controlled remotely through an on-board computer, this research UAV was made primarily of all-bonded composite materials to deflect radar. Boeing built two units as technology demonstrators and these aircrafts showcased an excellent combination of modern aerodynamics, materials, propulsion, and remote control. During the Condor’s 141-hour flight test in 1988 and 1989, this high-tech test bed reconnaissance aircraft set records for being the first piston-powered airframe to achieve a top altitude of 67,028 feet and staying in the air for almost two and a half days.