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Yakovlev Yak-42

From Academic Kids


The three engined Yakovlev Yak-42 was designed as a replacement for the twin engined Tupolev Tu-134 jet. It fulfills a role similar to that of the Boeing 727 as a mid-range passenger jet. The Yak-42 was also the first airliner to be produced in the Soviet Union to be powered by modern high-bypass turbofan engines.

To save design time, Yakovlev started with the Yak-40, making it larger and sweeping back the wings, with an 11-degree sweep prototype being rejected in favor of a 23-degree sweep. The Yak-42 was built at Smolensk, and it entered service with Aeroflot in late 1980. Almost 100 had been delivered by 1993.

Shortly after the type's introduction into commercial service, a number of accidents caused by vibrations in the tail section of the aircraft forced a suspension of the type's operations. After the necessary modifications were made, the Yak-42 re-entered service in the Soviet Union circa 1985.

The type was never exported, and only after the political transition of the former Soviet Union, a few Yak-42s were leased out to carriers in Africa and in former Yugoslavia.

Current models include the Yak-42 base version, the Yak-42D with a higher gross weight, and the Yak-142 with western avionics that never entered serial production. Late in 1997, Yakovlev announced the development of the Yak-42A, an improved version of the Yak-42D featuring a higher range and a modernised cabin interior.

Specifications (Yak-42)

General characteristics

  • Crew: two pilots
  • Capacity: up to 120 passengers
  • Length: 36.38 m (119 ft 4 in)
  • Wingspan: 34.88 m (114 ft 5 in)
  • Height: 9.83 m (32 ft 3 in)
  • Wing area: 150 m² (1,610 ft²)
  • Empty: 34,500 kg (76,100 lb)
  • Loaded: kg ( lb)
  • Maximum takeoff: 57,000 kg (125,700 lb)
  • Powerplant: 3x ZMKB Progress D-36, 6,500 kgf (64 kN, 14,300 lbf) thrust each

Performance

  • Maximum speed: 810 km/h (506 mph)
  • Range: 4,100 km (2,550 miles)
  • Service ceiling:8,800 m (29,000 ft)
  • Rate of climb: m/min ( ft/min)
  • Wing loading: kg/m² ( lb/ft²)
  • Thrust/weight:

References and external links

Related content

Related development:

Comparable aircraft: Boeing 727

Designation sequence: Yak-39 - Yak-40 - Yak-41 - Yak-42 - Yak-43 - Yak-44 - Yak-48


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