The MD-90 is the successor model of the MD-80 of McDonald Douglas Company in the United States. The fuselage has been lengthened and loaded with IAEV2500 engine, the cabin is improved and the vertical tail wing is enlarged.The first prototype flew for the first time on February 22, 1993, and was acquired on November 16, 1994FAAThe airworthiness certificate was delivered to users on February 24, 1995.Since April 1, 1995Delta Air Lines to see service.A total of 114 such models have been delivered and production has been stopped.In 1997, Boeing merged McDonnell Douglas. The MD-90 was in conflict with Boeing's product series, and production was stopped in 2000.
A passenger plane.Developed on November 14, 1989, with two sets installedInternational Aero Engine CompanyV2500 of (IAE)Turbofan engine。MD-90 adopts MD-80 fuselage section shape, advanced high lift wing and electronicFlight instrumentSystem.Interchangeable and standard fuselage parts enable the MD-90 to be assembled on the MD-80 production line.The initiating user of MD-90 is the United StatesTriangle AirlinesIt officially ordered 50 and intends to order 11.Other users haveAlaska Airlines20 are officially ordered, 20 are intended to be ordered, 15 are officially ordered by ILFC, 15 are intended to be ordered, and 10 are officially ordered by JAS.At present, MD-90 has three types.
McDonnell Douglas originally planned to install super-high culvert ratio on MD-90Propeller fan engine, and then still install the turbofan engine.The reason is that the oil price in the world oil market has been tending to be stable, so the oil saving effect of the propeller fan engine can not show economic superiority.Two MD90International aviationV2500 turbofan engine of Engine Company (IAE).MD-90 adopts MD-80's fuselage section shape, advancedHigh lift wingandElectronic Flight Instrument System。Interchangeable and standard body parts will enable the MD-90 to be assembled on the MD-80 production line.The initiating user of MD-90 is Delta Airlines, which officially ordered 50 and intends to order 11.The first MD-90 prototype flew for the first time on February 22, 1993, and was acquired on November 16, 1994FAAAirworthiness certificate, delivered to users on February 24, 1995.In 1997, Boeing merged McDonnell Douglas, MD90 was in conflict with Boeing product series, and production was stopped in 2000.MD-90 production quantity 117[1]。The production year is from 1993 to 2000.
JAL MD-90-30
The MD-90 took off from the first prototype in 1993 and finally stopped production in 2000. The total production quantity was 117.
Structural characteristics
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MD-90 is equipped with two sets ofV2500 engineThe engine has greater fuel efficiency, greatly reduces exhaust emissions and noise levels, and has less impact on the environment.The backward swept lower single wing is adopted;With swept back T-shaped vertical tail and horizontal tail;Two IAEV2500 are installed on the rear fuselageTurbo fan engine。
The MD-90 maintains the popular internal layout of five parallel seats, and does not provide passengers with the best comfort and the lowest internal noise.At the same time, the plane has wide seats, fewer middle seats, and more seats near the aisle and windows.
The MD-90 is designed with many cost-effective technologies.It is technically and economically competitive. It has an advanced cockpit, which includes electronic flight instrument system (EFIS), flight management system (FMS), advanced inertial reference and engine, and LED dot matrix display for system monitoring.
Other features of the MD-90 include a new advanced cabin design, vacuum toilet, variable speed/constant frequency power supply system, new auxiliary power unit, improved digital environmental control system, and carbon brake with a lighter weight and digital anti-skid system.In addition, forAircraft hydraulic systemSignificant improvements have also been made.
Main models
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MD-90-10The length of the fuselage is the same as that of the MD-87, which can carry 114 passengers (12 in the first class and 102 in the economy class).Two IAE V2500-D2 turbofan engines are installed with a single thrust of 97.86 kN (9986 kg), which is not produced.
China Eastern Airlines MD-90
MD-90-30The first model to be launched and the only one to be delivered for use are the MD-80 fuselage (1.45 meters longer in front of the wing) and the MD-87 tail.McDonnell Douglas will use MD-80 ultra-high bypass ratio (UHB) propeller fan engineVerification machineIt is modified as the prototype of MD-90-30.Two IAE V2500-D1 turbofan engines are installed with a single thrust of 111.21kN (11348kg).In 1994, the model certificate was obtained and delivered for use.The MD-90-30 can carry 153 passengers (12 in first class and 141 in economy class).
MD-90-30-ER: Extended range type, with spare fuel tank installed.[2]
MD-90-40Two IAE V2500-D5 turbofan engines are installed with a single thrust of 124.55 kN (12709 kg).The maximum fuel quantity is 22107 liters.The mixed level layout carries 180 passengers.The European layout type number of this model is MD-90-40EC, and the fuel quantity and commercial load are different from MD-90-40.
MD-90-50The range increased, the commercial load remained unchanged, and the wings, fuselage, tail wings and landing gear were strengthened, which were not produced.
technical data
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MD-90
MD-90-40
Captain (m): 46.51
Machine height (m): 9.33
Wing span (m): 32.87
Main track width (m): 5.09
Minimum turning radius (m): 31.9
Engine model: V2525-D5
Engine thrust (horsepower): 2 × 28000LB
Maximum takeoff weight (Kg): 72803
Maximum landing weight (Kg): 64411
Maximum oil-free weight (Kg): 59875
Maximum service load (Kg): 17500
Maximum oil load (Kg): 17800
Fuel capacity (Ltr): 22104
Average hourly fuel consumption (Kg): 2800
Maximum climb rate (m/s): 16
Utility ceiling (m): 11280
Maximum range with full load (Km): 4500
Maximum cruise speed (Km/h): 933
Maximum cruise speed (M): 0.84
Normal cruise speed (Km/h): 844
Normal cruise speed (M): 0.76
Final approach speed (Km/h): 264
Runway threshold speed (Kts, Km/h): 256
MD-90 in China
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MD-90 of China Southern Airlines
On June 22, 1992, Shanghai Aviation Industry Corporation of China and the United StatesMacDonald DouglasSign the contract for co production of MD-90 aircraft.The plan isMD-82Continuation of aircraft project.The original plan was to produce 40 MD-90 aircrafts, and the final agreement was to buy 20 MD90-30 aircrafts from MacDonald Douglas and manufacture 20 MD90-30 aircrafts in Shanghai.AndMD-82 aircraftDifferent parts are assembled in different ways. MD-90 aircraft is produced in a cooperative way, with drawings and raw materials provided by McDonald Douglas. China provides equipment and labor, and 70% of its parts are manufactured by China.Aircraft manufacturers in Xi'an, Shenyang and Chengdu separately produce fuselage, wing, nose and tail of aircraft,Shanghai Aviation Industry CorporationUndertake the task of final assembly.Finally, due to serious losses, sales and the merger of McDonnell Douglas with Boeing, the plan was suspended after only two MD-90s were manufactured.
