AT 1946 g. in EDO AS. Yakovlev created trainer Yak-U (Yak-11). It was created on the basis of the combat fighter Yak-3 with a radial engine AL-82FN. The first flight is perfect 29 April 1945 g. This aircraft test pilot MBX. Fedrovin reached maximum speed 682 kmh. But, despite such high performance, the aircraft has remained unclaimed, originated era of jet aviation. Yak-11 had an air-cooled engine power DB-21 700 HP. and it was a kind of half-AL 82.
As Ystrebytel 11 – video
Unlike the predecessor DB-21 fuel direct injection system was replaced with a carburetor. Yak-11 basically repeating design Yak-3, exception was the double cabin. All this allowed to complete the development of new aircraft as soon as possible. Aircraft construction - metal, only handlebars, ailerons and side rear fuselage fabric covering have. aircraft armament consisted of a 12.7-mm machine gun WCD, two 50-kg bombs and fotokinopulemeta.
First flight and factory tests performed by test pilot GS. Klimuškin. In the same year the aircraft passed state tests and was put into production at the factory number 292 in Saratov. During the operation of the Air Force revealed a number of manufacturing defects, in particular, crack occurred in the side members, destruction cooks propellers. In addition, the machines have insufficient stock of stability and controllability. We had to limit the supply of fuel to 150 kg instead of 268 kg. But, despite some of the comments, the need for the plane was so great, that starting next year its production mastered another plant - N ° 272 in Leningrad.
For several years, the Yak-11 standard system in the USSR, and with 1953 g. he began to build in Czechoslovakia for all Commonwealth countries. All were released 4166 this type of aircraft. This aircraft can be seen on the ground in many countries. One of the cars even hit the American Aviation Museum. Several Yak-11 converted into a single, designed for the filming of "Normandie-Niemen".
Yak-11 plane operated not only in aviation schools, but in the aero clubs of DOSAAF (without weapons). He set five world records for speed and range. In one of the flights in the 1951 g. at a distance of 500 km pilot YA.D. Forostenko average velocity has been shown 471,3 kmh. AT 1954 g. pilot IS. Chernov flew in a straight line 1990,2 km. The Yak-11 had a chance to take part in "combat" operations, GDR it was used to fight the propaganda balloons.
In the early 1950s,. new built aircraft began to move to three-wheeled chassis. AT 1951 g. They were designed and built two variants of the Yak-11 with chassis, poluchyvshye oboznachenye Yak-11U and Yak-11T. design weight has increased by almost 100 kg, because of this it was necessary to reduce the amount of fuel, and accordingly reduced and range. In the course of testing revealed one feature: aircraft with a nose strut had worse permeability of the ground and the snow. It was one of the reasons, that the Yak-11 with the nose landing gear was not built in series.
Tactical-technical characteristics of the Yak-11
– First flight: 10 November 1945 of the year
– Getting Started: 1946 year
– End of operation: 1962 year
– units produced: 4 566
As the 11 crew
– 2 man
The dimensions of the Yak-11
– Length: 8.50 m
– Wingspan: 9.40 m
– wing area: 15.40 m²
As Wes-11
– empty weight: 1854 kg
– Maximum takeoff weight: 2418 kg
Engine Yak-11
– 1 PD Shvetsov Ash-21
– Power: 1 × 615 l. from.
Speed Yak-11
– full speed: 456 kmh
– Cruising speed: 330 kmh
Range of flight of the Yak-11
– 1290 km
Practical ceiling Yak-11
– 7000 m
As Vooruzhenye 11
– Small-pushechnoe: one synchronized 12.7 mm gun WCD
– bomb-load: two bombs from 25 to 100 kg
– photographic: fotokinopulemet PAU-22
Photo Yak-11
