This scale model represents a parasol monoplane observation aircraft used by the United States Army Air Corps. They appeared in 1934 powered by a 675 HP Curtiss V-1570-59 inline engine. They served in observation squadrons for several years before being assigned to National Guard units. Twenty-four aircraft were manufactured. Crew of 2 Wingspan 45 feet 8 inches Length 33 feet 11 inches Empty weight 4,135 pounds Loaded weight 5,300 pounds Cruise speed 163 MPH