. . "The Spartan Aircraft Company was an American aircraft manufacturing company, headquartered on Sheridan Avenue near the Tulsa Municipal Airport in Tulsa, Oklahoma. Previously known as Mid-Continent Aircraft Company, the company had been reorganized under the Spartan name in 1928 by oil baron William G. Skelly \u2014 and operated until 1961, manufacturing aircraft, aircraft components, and recreational vehicle trailers."@en . . . . "Spartan Aircraft Company"@en . . . . . . "1928Z"^^ . .