Wing planes such as Boeing and fighter jets depend on pushing gases and air backward to gain thrust forward according to
Newton's third law of motion (each action has an equal and opposite reaction in
direction).
As for the helicopter, its top fan drives the
air downward, as a verb to push the plane up as a reaction (fig 1).
The rotation of the upper propeller generates a
rotating force of the plane in the opposite direction of its rotation, and the
tail fan equates this force and installs the helicopter straight.
When the pilot wants to move the plane forward,
he writes the fan down from the front and deflects it up from the front if he
wants to move it back (fig 2).
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