Yakovlev Yak-42

The Yakovlev Yak-42 (Russian: Яковлев Як-42; NATO reporting name: "Clobber") is a 100/120-seat three-engined mid-range passenger jet. It is the first airliner produced in the Soviet Union to be powered by modern high-bypass turbofan engines.

Variants

 * Yak-42: Original production version. Max. takeoff weight 54,000 kg (119,050 lb).
 * Yak-42ML: Version with modified avionics for use on international use (mezhdunarodnyye linii – international services). Entered service in July 1981 on the Leningrad-Helsinki route.
 * Yak-42D: Long-range version (Dahl'niy – long range) increased fuel. Replaced standard Yak-42 in production.
 * Yak-142: Derivative of Yak-42D with updated, western AlliedSignal avionics, spoilers to allow faster descent and enlarged cabin door to accommodate jet bridge. Also designated Yak-42A, Yak-42-100 and Yak-42D-100.
 * Yak-42R: Yak-42 used as testbed for radar for Yakovlev Yak-141 fighter.
 * Yak-42F: Conversion of a Yak-42 for geophysical survey and environmental monitoring. Fitted with large underwing pods containing electro-optical sensors.
 * Yak-42LL: Conversion as testbed for Progress D-236 propfan engine. Single D-236 (rated at 8,090 kW (10,850shp)) mounted in place of starboard engine, on special pylon to give sufficient clearance for 4.2 m (13 feet 9¾ inches) propellers. First flew on March 15th, 1991.
 * Yak-42M: A projected but unbuilt stretched airliner. Planned to be powered by three Progress D-436 turbofans, a stretched fuselage and new wings. Design developed into Yak-242.
 * Yak-242: Further developed Yak-42M, with two underwing Aviadvigatel PS-90 turbofans.

Related Development

 * Yakovlev Yak-40
 * Yakovlev Yak-242

Comparable Aircraft

 * Boeing 727
 * Hawker Siddeley Trident
 * Tupolev Tu-154