Why do big commercial airplanes have wings on the bottom and big (US) military airplanes have their wings on top?

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Why do big commercial airplanes have wings on the bottom and big (US) military airplanes have their wings on top?

In: Engineering

14 Answers

Anonymous 0 Comments

I have skimmed, but hadn’t seen anyone touch specifically on clearance from ground vehicles. Military bases tend to make heavy use of ground transport for loading/unloading people and equipment (contrast to a commercial terminal with jetways and a structured cargo loading network), so extra clearance under the engines and especially the wingtips (which are also well above the level of the driver in most vehicles) should help to prevent collisions.

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