Ordnance Engineering Corp. founded mid-1916 in New York City, with plant at Baldwin, Long Island, to build aircraft for US Army and other customers. Type A side-by-side trainer (February 1917) found no takers. In June or July 1917 Etienne Dormoy, experienced SPAD designer and member of Mission to USA, designed Type B fighter (early 1918), built in small numbers. This led to 3 versions of Type C, and thence to D (300-hp Hispano, January 1919). Outstanding fighter, but Curtiss underbid and got contract for 50. To avoid confusion with Army Ordnance Branch, company at this point coined acronym Orenco. Attempts to develop D further led nowhere and neither did 6 planned post-war models.