Martin M2O

The Martin M2O was a three-seat biplane built by the Glenn L. Martin Company, as the Martin Model 60, for the United States Navy in the 1920s. It was the Martin-built version of the Naval Aircraft Factory NO, a short-range reconnaissance and gun spotting design drawn up at the Navy Bureau of Aeronautics. The aircraft could be fitted with a tailwheel undercarriage or two floats, was powered by a 435 hp Curtiss D-12 water-cooled V-12 engine and carried a swivel-mounted machine gun in the rear cockpit. In 1923 the Navy ordered three aircraft from Martin and three from the Naval Aircraft Factory, deliveries of the M2O-1 began that year and all six were finished by the end of 1924. It proved no better than the Vought UO in the gun spotting role, never entered quantity production, and all six were withdrawn from use by the end of 1927.