(If you place an engine too close to the ground, it can suck in debris while the plane is taxiing.) That change allowed Boeing to accommodate the engines without completely redesigning the 737 fuselage - a fuselage that hasn't changed much in 50 years.īut the new position of the engines changed how the aircraft handled in the air, creating the potential for the nose to pitch up during flight. Because they're bigger, and because the 737 sits so low to the ground (a deliberate design choice to let it serve small airports with limited ground equipment), Boeing moved the engines slightly forward and raised them higher under the wing. Those engines, though, required Boeing to make critical design changes.
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