Highest altitude reached by a piston-driven propeller UAV without payload

What to remember

In 1989, the Boeing Condor, a piston-driven propeller drone, climbed to 20.430 km, or 67,028 ft. That is the altitude record for this class of drone.

The flight was made without payload.

Altitude records are sorted by type of aircraft. For fixed-wing planes, the Fédération Aéronautique Internationale also separates two cases: an aircraft that leaves the ground under its own power, and one first carried aloft by a carrier aircraft before its record attempt.