The Four Forces

Four forces: thrust, drag, lift, and weight.

Why are aircraft designed with these components and not some other configuration? Because these components are designed to take advantage of the four forces of aerodynamics. They work.

The four forces are thrust, drag, lift, and weight (gravity). Your car, however, doesn’t have to lift anything to operate so it faces thrust, drag, and weight, only. When the four forces of flight are in equilibrium, the play is cruising straight and level.