NA-68 and -69
In 1939, it dawned on the British that their available aircraft were coming up short in both performance and production numbers. In April, 1940, Sir Henry Self of the British Purchasing Commission met with "Dutch" Kindelberger, representing North American Aviation, in New York City. They quickly worked out a deal for the development of two aircraft, evolved from the eminently successful NA-16 advanced trainer, already in full production, and the NA-50, a fighter with a big engine. These would be known as the NA-68 and NA-69, powered by a Wright R-1820-60 engine, of 1200 hp. Fixed armament was two 20 mm cannons and two .303 machine guns, with the two-seat NA-69 adding an additional flexible defensive machine gun.