TYPE: Regional jet airliner.

PROGRAMME: Originated in Yak-242, which proposed as successor to Yak-42 and included in State Programme for Aviation, with maiden flight scheduled for 1998. Project lapsed, but revived in 2003 when re-launched as MS-21 (Magistral'nyi Samolet 21 Veka: airliner of the 21st Century), with design inputs from Ilyushin, having gained official support against Il-214 and Irkut 111 in competition decided on 21 July and formally announced 18 August 2003. Also envisaged as Tu-154M replacement. Irkut to join programme as risk-sharing partner. First flight two years from go-ahead and service entry three years thereafter. Production will be by Aviastar.

CURRENT VERSIONS: MS-21-100: With 132 seats in three classes (12+24+96).
MS-21-200: With 156 seats in two classes.
MS-21-300: With 174 seats in single class.

COSTS: Development estimated as US$460 million (2003), including US$200 million from Russia government.

DESIGN FEATURES: Low-wing airliner with two podded engines underwing. Intended 70 per cent engine, systems and avionics commonality with Ilyushin/Irkut/HAL Il-214.
Supercritical wing section designed in collaboration with TsAGI; leading-edge sweepback 250: winglets.

FLYING CONTROLS: Digial fly-by-wire controls. Double-slotted flaps.

LANDING GEAR: Tricycle type; hydraulically retractable. Four-wheel main bogies; tyre size 950x300; pressure 7.85 bar (114 lb/sq in). Twin nosewheel, size 660x200, pressure 8.82 bar (128 lb/sq in).

POWER PLANT: Two 118 kN (26,450 lb st) Aviadvigatel PS-12 turbofans (derated PS-90A).

ACCOMMODATION: Two flight deck crew. Seating for 130 to 170 passenger.

All data are provisional.