为什么飞机可以飞Why Do Airplanes Fly?

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为什么飞机可以飞Why Do Airplanes Fly?

As an aviation fan you have read a lot of interesting articles about aviation world, but do you know basic flight principles? Why do airplanes fly? We will explain 4 basic forces of flight.

作为一个航空迷，你已经读了很多关于航空世界的有趣文章，但是你知道基本的飞行原理吗?飞机为什么会飞?我们将解释飞行的四种基本力量。

Mid-flight airplanes is effected by 4 basic forces: thrust, drag, gravity and lift. If all of these forces are balanced, plane stays up in the air. Each of these forces are crucial for plane to fly.

飞行中的飞机受到四种基本力的影响:推力、阻力、重力和升力。如果所有的力都平衡了，飞机就保持在空中。每一种力对飞机的飞行都至关重要。

Lift is generated as a curved airfoil wing flies through the sky, it deflects air and alters the air pressure above and below it. That's intuitively obvious. Think how it feels when you slowly walk through a swimming pool and feel the force of the water pushing against your body: your body is diverting the flow of water as it pushes through it, and an airfoil wing does the same thing (much more dramatically—because that's what it's designed to do). As a plane flies forward, the curved upper part of the wing lowers the air pressure directly above it, so it moves upward.

当一个弯曲翼型机翼在天空中飞行时产生升力，它使空气偏转，并改变上面和下面的空气压力。这是直观。想想感觉当你感觉慢慢走过一个游泳池,水的力量压在你的身体,你的身体将水流推动通过它,而一个翼翅膀做同样的事(但戏剧的是,机翼的设计就是这个目的)。当飞机向前飞行时，弯曲的机翼上部降低了正上方的气压，所以飞机向上移动。

Thrust is a force that moves an aircraft in the direction of the motion. It is created with a propeller, jet engine, or rocket. Air is pulled in and then pushed out in an opposite direction. One example is a household fan.

推力是使飞机朝着运动方向移动的力。它是由螺旋桨、喷气发动机或火箭产生的。空气被吸入，然后以相反的方向被排出。一个例子是家用电扇。

Drag is the force that acts opposite to the direction of motion. Drag is caused by friction and differences in air pressure.

阻力是与运动方向相反的力。阻力是由摩擦和空气压力的差异引起的。

Gravity is a force that acts in a downward direction—toward the center of the Earth.

重力是一种向下作用的力——向着地球的中心。

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空气动力学完事？其他的只是附加题