Yak-50 is a training aircraft, representing an all-metal monoplane with low cantilever wing located.
The design of the Yak-50 and history
All-metal semi-monocoque fuselage. Right wing of the plane has a trapezoidal shape. Three-point chassis ground can get out of a two-wheeled in flight and an additional non-retractable. The cockpit is closed sleek lantern. Air-cooled radial engine M-14P.
As a result of restrictions on the establishment of-the Yak and Yak-18PS 18PM there is a need to renew the issue of single aerobatic aircraft for the Soviet national team and flying clubs. Before engineers posed a difficult task - to create the best of existing aircraft. The main defining characteristics - power and specific load on the wing - it was necessary to keep the level 2,5 kg / hp. and 60 kg / cm2 respectively.
Engine M-14P had power 360 hp Despite all its benefits, it was too heavy and large for aerobatic aircraft. But at that time simply did not have the other. The Yakovlev Design Bureau in 1972, the power light aviation brigade was established new single aerobatic Yak-50. It is almost completely retained by the aerodynamics of the aircraft Yak-18PS. Value Profile and tail rudder area was changed in the same way as the value of the aerodynamic control surfaces assembly, which in turn contributed to the reduction efforts at the controls. However, the Yak-50 size and design was very different from the Yak-18PS.
The fuselage of the aircraft was carried out under the scheme semi-monocoque, dural lining, single-spar wing design that works. Center-abolished. Detachable wing components are joined to the fuselage. Svobodonesuschim performed empennage. Fabric covering remains on the ailerons and rudders. Trying to lighten the airplane, the experts had to resort to chemical milling skins. The non-violent elements of the airframe were used lighter plastic parts, in some places - titanium alloys. The aircraft is equipped with retractable tricycle landing gear, tail wheel is available. Their release, cleaning, start the engine and brake control are performed pnevnosistemoy.
Oil system enables the aircraft to perform 2-minute inverted flight. As for the fuel system, it consists of a main 55-liter tank 35-minute flight and the additional tank, which allows to increase the distillation range of up to 500 km. The design of the Yak-50 consistent with the technical capabilities of aviation industry 1970-ies. Serial production of the Yak-50 1973 began in the year Arsenevsky aircraft factory. Speaking at the Yak-50 1976 in the year, the Soviet team won the confidence in the world championship, which was held in Kiev. While absolute champions were our athletes Lydia Leonov and Viktor Letsko.
Our pilots a year managed to get the title of Champions of Europe, and in 1982, Viktor Smolin in Austria has become the undisputed world champion. S. Savitskaya and O. Vulygin set world records and speed climb. With the advent of UC-50 in international competitions he has established a unique Soviet style of piloting, implying the implementation of figures with large overloads at high speeds.
Tough style of piloting, which is characteristic of modern aerobatics, contributed to a sharp change in the conditions of the loading of the aircraft: increased frequency of occurrence of both negative and positive overload. While the problem of site sport aircraft has not been well studied. In 1978, as a result of destruction of the wing was killed V. Letsko, absolute world champion. For the same reasons, the airplane lost the national team athletes and Artishkyavichus Gomylyaeva. Its main drawback was the unreliability of the design.
|Aircraft Length m||7.68|
|Wing area, m2||15.00|
|Internally fuel l||Further 55 120 + l 2 tanks|
|engine's type||1 PD VMKB (Veldeneev) M-14P|
|Power, hp||X 1 360|
|Maximum speed km / h||420|
|Cruising speed, km / h||320|
|Practical range, km||495|
|The duration of the flight, ch.min||0.48 (without fuel)|
|Practical ceiling, m||5500|
|Max. operation overload||9|
Yak-50 is experienced Soviet light fighter-interceptor. He is considered a logical continuation of the Yak-30, but has some differences. The first is the presence of a more powerful engine with VC-1 2700 kgf thrust and altered wing sweep angle (45 degrees). At the end of the period of 40-ies of Western Europe and the United States strongly developed strategic aviation. In the Soviet Union they were suspected of a possible new war, so we decided to create special interceptors such bombers in case you need to use them. On his own initiative in the Yakovlev Design Bureau began work on a similar interceptor. The second reason was the output resolution of the Council of Ministers on the establishment of an airplane (fighter) with the ability to use the engines VC-1.
It was put forward to the future initial TTT unit, in particular the maximum speed of the future fighter was to be not less than 1100 km / h, the ceiling - up to 16 km. The aircraft must have a fast rate of climb for lightning-fast response and a wide range of flight spectrum. With rich experience in the creation of the Yak-30 and thanks to the creativity, the designers decided to start developing with the reduced weight of the structure. First of all, in contrast to the Yak-30, eased the armor protection of the cockpit, and then developed a plan to reduce the number of weapons.
Thus, a fighter installed two 23-millimeter gun HP-23 160 with ammunition in shells. Protecting the cockpit is now looked like this: the thickness of the front bronestekol - 60 mm armored plate - 8 mm bronezagolovnik - 10 mm. Also, to reduce the weight of the impact the wide use of magnesium alloys and cycling gear. The basis of the equipment of radio equipment included radar "Kite", located in a flood of radio waves above the upper inlet.
Each wing has three ridges and aerodynamic flaps. The elongation of the wing compared with the base model was 4,0, narrowing - 1,2, wing chord constant cross V - five degrees. Vertical and horizontal tail sweep area of the vertical - 3,0 m2, Horizontal - 2,86 m2. The area under the aft fuselage additional ridge - 0,344 m2. These materials and Applied technologies allow design Yak-50 light type with the presence of engine VC-1.
In July 49 was appointed to pilot plant tests of the aircraft. They became famous aviator S. Anokhin. He managed to disperse the aircraft to a speed of M = 1,01, and on state tests interceptor demonstrated improved speed of M = 1,03. According to the results of all tests S. Anokhin was very pleased with the aircraft and said that he is the best fighter on the results of experimental release of 1949 years.
But the representative of the Air Force and the SM Samohin (customer) thought that the TTT aircraft designed with disabilities and should not have to continue. Besides, during the state tests for M = 0,97 speed in horizontal flight any longitudinal oscillations whereby shooting was Unsighted. During the run in a crosswind in 5 m / s and more roll on the plane wing, opposed to demolition, and began to cling to WFP Wheel arch bar. Because of this it arose unfurling extra time and Yak-50 began to roll down the runway. And because of mismanagement nose strut landing on wet and icy in particular runway aerial vehicle becomes uncontrollable.
As a result, engineers have admitted their mistake with the choice of cycling gear, and then it and did not put any one airplane class fighter. Yak-50 for these reasons did not get into production, and in 1950, the Ministry of Defense has decided to reduce the range of the aircraft of this class and agreed that the basic serial fighter in the USSR will be designed in OKB Mikoyan and Gurevich.
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