The Williams X-Jet or WASP, was a small, one-man, Vertical Take Off and Landing (VTOL) aircraft developed by Williams International. The craft was powered by a small turbofan engine capable of producing 570 lbf (2.6 kN) of thrust.
United States Patent: 4447024
Pretty impressive altitude at ~12:14. Looks to be a couple hundred feet. Pretty impressive for 35 years ago (patent 1984).
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