THK-11

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]

THK-11
A replica THK-11 on display at the Ankara Türk Hava Kurumu Müzesi - (Ankara Turkish Aeronautical Museum)
Role	Cabin monoplane
National origin	Turkey
Manufacturer	Türk Hava Kurumu (THK - Turkish Aeronautical Association)
First flight	1947
Status	Abandoned
Number built	1

Design and development

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.

Specifications

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

General characteristics

• Crew: 2
• Capacity: 1 passenger
• Length: 8.44 m (27 ft 8 in)
• Wingspan: 11.80 m (38 ft 9 in)
• Height: 2.59 m (8 ft 6 in)
• Wing area: 18.7 m² (201 sq ft)
• Empty weight: 828 kg (1,825 lb)
• Gross weight: 1,150 kg (2,535 lb)
• Powerplant: 1 × de Havilland Gipsy Major four-cylinder air-cooled inverted in-line engine, 101 kW (135 hp)
• Propellers: 2-bladed fixed-pitch pusher propeller

Performance

• Maximum speed: 201 km/h (125 mph, 109 kn)
• Cruise speed: 164 km/h (102 mph, 89 kn)
  
• Landing speed: 80 km/h (50 mph; 43 kn)
• Range: 800 km (500 mi, 430 nmi) in still air
• Service ceiling: 3,500 m (11,500 ft)
• Rate of climb: 3.5 m/s (690 ft/min)
• Wing loading: 61.5 kg/m² (12.6 lb/sq ft)
• Power/mass: 11.4 kg/kW (18.7 lb/hp)

See also

• Twin-boom aircraft

Aircraft of comparable role, configuration, and era

• SECAN Courlis

References

1. "Progress in Turkey". Flight. Vol. LVI, no. 2127. 29 September 1949. p. 442.
2. The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing. p. 2996.
3. Bridgeman, Leonard (1951). Jane's All The World's Aircraft 1951–52. London: Sampson Low, Marston & Company, Ltd. p. 191c.
4. Bridgeman, Leonard (1949). Jane's All The World's Aircraft 1949-50. London: Sampson Low, Marston & Company, Ltd. pp. 183c–184c.