Helicopter physics
☝🏻 A helicopter, unlike an airplane, is capable of rising vertically upward.
Lift force is provided by the bearing propeller. However, the rotation of such a propeller, according to Newton's Third Law, should cause the body to rotate in the opposite direction, which would turn the machine into a real merry-go-round.
To avoid this, either a second propeller rotating in the opposite direction is placed over the first propeller, or a tail rotor is placed on the tail. In addition to maneuvering itself, it prevents the hull from spinning out, neutralizing the movement of the main rotor.
☝🏻 A helicopter, unlike an airplane, is capable of rising vertically upward.
Lift force is provided by the bearing propeller. However, the rotation of such a propeller, according to Newton's Third Law, should cause the body to rotate in the opposite direction, which would turn the machine into a real merry-go-round.
To avoid this, either a second propeller rotating in the opposite direction is placed over the first propeller, or a tail rotor is placed on the tail. In addition to maneuvering itself, it prevents the hull from spinning out, neutralizing the movement of the main rotor.