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Boeing 737 Classic
The Boeing 737 Classic is the -300/-400/-500 series of the Boeing 737, so named following the introduction of the -600/-700/-800/-900 series. They are short- to medium- range, narrow-body jet airliners produced by Boeing Commercial Airplanes. The Classic series was introduced as the 'new generation' of the 737.〔Shaw, 1999, pg. 7.〕 Produced from 1984 to 2000, 1,988 aircraft were delivered.
==Development and design==
Following the success of the Boeing 737-200 Advanced, Boeing wanted to increase capacity and range, incorporating improvements to upgrade the plane to modern specifications, while also retaining commonality with previous 737 variants. Development began in 1979, and in 1980 preliminary aircraft specifications were released at the Farnborough Airshow.〔Endres, 2001, p.126.〕 In March 1981, USAir and Southwest Airlines each ordered 10 aircraft, with an option for 20 more.
The new series featured CFM56 turbofan engines, yielding significant gains in fuel economy and a reduction in noise, but also posing an engineering challenge given the low ground clearance of the 737. Boeing and engine supplier CFMI solved the problem by placing the engine ahead of (rather than below) the wing, and by moving engine accessories to the sides (rather than the bottom) of the engine pod, giving the 737 a distinctive non-circular air intake.〔Endres, 2001, p.128.〕
The wing incorporated a number of changes for improved aerodynamics. The wing tip was extended . The leading-edge slats and trailing-edge flaps were adjusted.〔 The flight deck was improved with the optional EFIS (Electronic Flight Instrumentation System), and the passenger cabin incorporated improvements similar to those on the Boeing 757.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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