IL-12 a passenger plane for flights to medium-haul routes. The codification of international organizations, NATO has the Coach designation, which means "long-distance bus." This machine was designed and in the cargo version, which expanded its application. The machine is made in the scheme of all-metal aircraft with two engines which are arranged on the wings. This nizkoplan equipped with piston engines and had a standard tricycle landing gear. The first IL-12 plane took off from the runway in the middle of August 1945 years. When this ship was no longer a need to use this aircraft as Li-2 on the airline of the Soviet Union.
History of the IL-12
The new project of passenger aircraft under the designation Il-12 1943 was launched in the autumn of the year in the design Ilyushin bureau. The first study of the body allowed designers to calculate the occupancy 29 passengers in the cabin. The machine could fly 5 thousand kilometers at normal speed 400 km / h. Originally planned to equip the machine with four engine model M-88V, but were eventually selected diesel engines of type AH-31. When installing them changed the number of passenger seats in the cabin before 27. Also we decided to manufacture the fuselage leaking.
Sketch liner was ready in the beginning of autumn 44 years, then started for the creation of an experimental model. The first flight in August 45 years has been carried out under the control of the Test B. Kokkinaki and K. Kokkinaki. During subsequent flights, it became clear that the machine requires significant improvements, the main problem was the power plant. This eventually led to the replacement of diesel engines in the petrol engines of the brand AL-82FN. It was finalized under the wing of the settings. Testing IL-12 with new engines continued from January 46 years. At the first departure was discovered violent shaking of screws, it was decided the creation of a new design of screws and increase their rigidity.
State tests of the unit took place in the late summer of 46 years, as a result of the quality of construction was confirmed and high performance characteristics. IL-12 was presented to the public in the same year, on parade in Tushino. Since October 46, the car was sent to the serial production of the Moscow Aviation Plant.
Design features of the IL-12
In addition to the passenger, it was designed and transport version, which had exactly the same hull design and the basic units. To control the machine took five crew members, among whom were two pilots, a radio operator, and navigator onboard mechanic.
The case was made with the help of beams and stringers where there 48 51 frames and stringers, which is attached to the machine cladding. In the forward cockpit section was located, which was for the luggage compartment. The cargo version of the IL-12 in the left side cargo door is large.
The wings consist of three spars and manufactured cantilever version. On each console, wing fairings installed. To control the machine in flight wings are equipped with slotted ailerons and flaps. The peculiarity of the wing is a system that provides heating and it does not frost up emu. All feathering IL-12 has a cantilever structure of the form.
chassis system consists of three pillars, which are removed in the middle of the body during the flight. On the main bearing is set on two wheels with brake systems. The front leg does not brake, but also has two wheels.
The aircraft is equipped with two types of engine AL-82FN, they are air-cooled and thus develop capacity in 1850 horsepower at takeoff. Gasoline, which is supplied with the engine, placed in ten fuel tanks with total capacity of 6 thousand liters. The appliance is fitted screws of a new design and are designated AB-9V the changing step in the flight.
|Aircraft Length m||21.31|
|Wing area, m2||103.0|
|Domestic fuel l||6500|
|engine's type||2 PD Shvetsov Ash-82FNV|
|Power, hp||X 2 1830|
|Maximum speed km / h|
|near the ground||366|
|Ferry range, km||3800|
|Practical range, km||2200|
|Practical ceiling, m||6700|
|Payload:||27-32 2160 kg passenger or cargo|
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