The THK 11 was a 1940s prototype Turkish four-seat monoplane, designed by Stanisław Rogalski and built by Türk Hava Kurumu (THK - Turkish Aeronautical Association).

[1][2] The THK-11 was a high-wing twin-boom cantilever cabin monoplane with a 135 hp (101 kW) de Havilland Gipsy Major piston engine driving a pusher propeller.

[1] It has a fixed nose-wheel landing gear[2] and was first flown in 1947.

Data from Jane's All The World's Aircraft 1951–52,[3] Jane's All The World's Aircraft 1949–50[4]General characteristics Performance

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