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«Defense Technologies» 2005, №4, V.3, p.15

MS-21 short- and medium-haul aircraft

The MS-21 aircraft is to replace in Russia all models of Tu-154B and Tu-154M aircraft as well as Yak-42

One of the major results of the Yakovlev's work in 2003 was the victory of the MS-21 aircraft project in a bid for short- and medium-haul aircraft for domestic and foreign airlines. The model has been developed on the basis of Yak-242 type by the Yakovlev Design Bureau in association with the llyushin Aviation Complex. The design rests not only on scientific and technological experience of work on the Yak-242 but also provides for maximum commonality of on-board systems, equipment and power-plant with those of the MTA (Medium-Transport Aircraft) being developed by Russia's companies llyushin and Irkut and India's HAL Corporation.

The MS-21 airplane was readily embraced by the aircraft market since it meets all the requirements and is able to compete against similar Boeing and Airbus aircraft, outdoing them in price, fuel efficiency and passenger comfort.

For instance, aircraft of the MS-21 project were compared against Airbus company's A320 and Boeing's latest models, B7I7 and B737. The Russian aircraft features an improved passenger comfort cabin, enhanced (up to 17g/psgr. km) fuel efficiency and reasonable price. In terms of cost-to-effective-ness ratio, the new Russian-built aircraft will significantly outperform similar advanced aircraft offered by the West. It is planned to fit to the aircraft, with the assistance of TsAGI (Central Aerodynamic Institute), an aerodynamically perfect "high-speed" wing. This will increase the aircraft cruising speed to over M=0.8, a very important characteristic for current advanced passenger aircraft.

The new development will employ new technologies and materials. For instance, developers of the new power plant have proposed several variants of an engine with a minimum thrust between 11,000 and 12,000 kgf. Among them are PS-90A-12 and PS-12 engines as well as TRDD-2005 advanced double-flow turbojet engine. It is planned that the new Russian-built engines will feature a very high specific fuel consumption rate, up to 0.5kg/kg(t). h. Also, it is possible to fit the new aircraft with foreign-built engines, for instance, with V2500A, CFM56-7B26, and V2527-A5.

The MS-21 aircraft is to replace in Russia all models ol'Tu-154B and Tu-154M aircraft as well as Yak-42. It is planned to build within 20 years around 600 aircraft of the MS-21 family, with an annual production rate of 30 to 36 machines. During 2009-2028 it is planned to sell around 640 MS-21 aircraft, of which around 415 examples will go to Russia's domestic market and 225 to foreign customers. It is planned to build on the basis of MS-21 a family of aircraft. Those will be an MS-21-100 aircraft to carry 132 or 116 passengers in a two-class configuration, an MS-21-200 to carry 156 or 140 passengers in a two-class configuration, an MS-21-300 to carry 174 or 158 passengers in a two-class configuration, an MS-21 К to carry cargoes, an MS-21 KP to carry cargoes and passengers. If necessary, developers are prepared to offer to the market an MS-21 in a three-class configuration or in a VIP version.

Russia's Federal Civil Aviation Development Program for 2002-2010 and beyond till 2015 estimates construction of the short- and medium haul aircraft at US$ 600 million, of which only US$ 210 million is expected to be provided by the national budget, whereas the remaining funds (US$ 390 million) are to be obtained by developers from non-budgetary sources.

The MS-21 project has currently aroused interest among several countries to whom the Russian company has presented all necessary feasibility study results.

Flight performance of MS-21 aircraft fitted with Russian-built engines:

Flight performance100200 300
Takeoff weight, kg65,80071,10072,000
Takeoff thrust, (N=0, M=0), tf2x11,8
Specific fuel consumption in cruising mode, kg/kgf * h0,545
Thrust-to-weight ratio0,360,330,328
Number of passengers 132156174
Weight of fully equipped aircraft, kg37,00038,60039,900
Weight of equipped aircraft per one passenger, kg/psgr280247229
Commercial load at maximum number of passengers, kg12,54014,82016,530
Maximum fuel, kg22,000
Cruising flight altitude, m11,600
Cruising speed, km/h850
Operational flight range at maximum number of passengers4,7005,5004,500
Fuel consumption per passenger-kilometer, g/psgr-km21,517,516,6
Runway length, m210024002400



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