The Yak-42 is a three-engine regional regional passenger aircraft developed in the USSR in the mid-1970s to replace the aging Tu-134.
In the early 1970s, Aeroflot began to feel the need for a regional passenger aircraft, which could replace the IL-18 and, in part, the Tu-134.
Development began in 1972. Several prototypes were made with different sweeps of the wing, of which a variant with a sweep of 23 ° was chosen. The prototype of the aircraft was released by the Smolensk Aircraft Plant in late 1974 and 1975 entered flight tests.
Transportation on the Yak-42 began to be carried out by Aeroflot in 1980, but the disaster of one of them in 1982 stopped serial deliveries for 2 years. In 1988, mass production of a new modification with increased range and maximum take-off weight began – the Yak-42D. The plane was exported to China and Cuba. The last aircraft was delivered to the customer in 2003. Aircraft production was discontinued, and the Saratov Aviation Plant ceased operations.
By the end of the first decade of the 21st century, the aircraft was already inferior in fuel efficiency to foreign liners of similar capacity. Nevertheless, several airlines operated it until September 2011, when a plane crash that claimed the lives of members of the Lokomotiv hockey team put an end to its commercial operation in Russia. A total of 183 aircraft were produced.
The aircraft was built according to the scheme of a low-bearing low-wing with a fuselage of semi-monocoque design. Three turbofan engines are located in the rear of the fuselage: two on the pylons on the sides and one inside the fuselage with an S-shaped channel air intake. The aircraft has a cantilevered swept wing and a T-tail.
The plane was a step forward in the Soviet aircraft industry. During its development, special attention was paid to the economic efficiency of its production and operation. Because of this, many solutions were used in its design, which made its direct analog – the Tu-134 archaism in many economic comparisons. Like the Yak-40, an integrated gangway located in the tail is used.
The aircraft landing gear is a tricycle, with the release of the front support upstream and the main supports across the flow to the sides, control the rotation of the front support, cleaning-release, and landing gear braking – hydraulic. Wheels are unified with Tu-154 wheels.
Power plant – D-36 engines on the Yak-42 are not equipped with traction reverse, but, thanks to a very low landing speed (about 200 km / h), aerodynamic means of the chassis brakes are enough to stop. The installation of the reverse on the aircraft structure was rejected to save weight.
- Type Regional Passenger Aircraft
- Power plant three double-circuit turbojet engines D-36 at 6 499 kgs each
- Maximum number of passengers 120 people
- Practical ceiling 9,600 m
- Flight range 2,300 km
- Maximum take-off weight 53.5 t
- Cruising speed 810 km / h
- Wingspan 34.88 m
- The wing area is 150 sq. m
- Length 36.38 m
- Height 9.83 m