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Four primary forces govern how an airplane stays in the air:

Air resistance that opposes the forward motion of the plane. Types of Modern Airplanes Airplanes are generally classified by their intended use: airplanes.webm

Generated by the shape of the wings (airfoils), which causes air to move faster over the top than the bottom. Four primary forces govern how an airplane stays

The forward force provided by propellers, jet engines, or rockets. airplanes.webm

Airplanes are fixed-wing aircraft that use thrust from engines and the dynamic reaction of air against their wings to achieve flight. From the Wright brothers' first flight in 1903 to modern commercial airliners, aviation has shrunk the globe and revolutionized global travel and trade.

The downward pull of gravity that lift must overcome.