THK-11The THK 11 was a 1940s prototype Turkish four-seat monoplane, designed by Stanisław Rogalski and built by Türk Hava Kurumu.Design and developmentThe THK-11 was a high-wing twin-boom cantilever cabin monoplane with a de [Havilland Gipsy Major] piston engine driving a pusher propeller. It has a fixed nose-wheel landing gear and was first flown in 1947.