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Vought V-173, the “Flying Pancake“, an American experimental fighter aircraft for the United States Navy (1942). Lockheed XFV, “The Salmon,“ an experimental tailsitter prototype escort fighter aircraft (1953). De Lackner HZ-1 Aerocycle flying platform, designed to carry one soldier to reconnaissance missions (1954). Snecma Flying Coleoptere (C-450), a French experimental, annular wing aeroplane, propulsed by a turbo-reactor, able to take off and land vertically (1958). Dornier Do 31, a West German experimen
