Since 1935, the company specialized in the military and trainer aircraft. After the war, North American continued building military aircraft and also experimental aircraft, such as X-15. After further reorganization, the company became known as Rockwell International. The fuselage is round with a long canopy and a rounded tail fin. Low-set wings are unswept with rounded tips.
Tailplane is swept on the leading edge and rounded on the trailing edge.
Landing gear with tail wheel is retractable. First NA-26 prototype was flown in 1937. Several modifications of T-6 were built differing only in engines or minor design specifics. G were built. The fuselage is narrow with glazed nose and a small turret in the rear of the fuselage.