The Herrick HV-2 Vertaplane could fly as a biplane or as an autogyro. The upper wing could be unlocked, but not locked in flight. The earlier HV-1 crashed, but the HV-2A successfully converted from fixed-wing to autogyro mode for the first time in July 1937 over its Boulevard Airport, Philadelphia base. Test flying had already begun in 1936 and this visit to Floyd Bennett Field took place in that year if the date is correct. Photo by: Rudy Arnold / Smithsonian Institution