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Yakolev Yak-11 
The Yak 11 began life as a radial engine tandem seat advanced fighter trainer variant of the Yak‑3. A converted Yak‑3 trainer flew in 1945 as the Yak-3UTI and in 1946 there appeared a second prototype with a number of refinements and using less Yak-3 components.
Trials were completed in 1946 and entering Soviet service in 1947. The Yak-11 has all-metal wings and a fuselage covered in plywood and fabric and has a retractable tailwheel landing gear.
NATO code name ‘Moose’. A total of 3859 being built until production ended in 1956 before moving on to a modified version featuring a nosewheel.
Also built under licence in Czechoslovakia as the LET C-11, production totalled 3859 in the USSR and, from 1953, 707 in Czechoslovakia,
In 1958 there appeared the Yak-11U (Czech C-11U) version with retractable tricycle landing gear.
 Yak C.11
The Yak-11 was a two-seat intermediate trainer and became a standard type with the Soviet forces and those of a large number of other countries including Afghanistan, Albania, Angola, Bangladesh, Bulgaria, Cambodia, China, Czechoslovakia, East Germany, Hungary, Mongolia, Poland, Romania, Somalia, USSR, Vietnam, and Yemen.
Engine: 1 x Shvetsov ASh-21, 570 hp / 425 kW
Wingspan: 9.4 m / 30 ft 10 in
Length: 8.5 m / 27 ft 11 in
Height: 3.3 m / 10 ft 10 in
Wing area: 15.4 sq.m / 165.76 sq ft
Empty weight: 1900 kg / 4189 lb
Max take-off weight: 2418 kg / 5331 lb
Max. speed: 456 km/h / 283 mph at 8200 ft / 2500 m
Cruise speed: 400 km/h / 249 mph
Service ceiling: 7100 m / 23,295 ft
Range w/max.fuel: 1290 km / 802 miles
Armament: 1 x 12.7mm or 2 x 7.62 mm machine-guns
Bombload: 2 x 110 lb / 50 kg
Crew: 2  Yakolev Yak-11
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