What does the hovercraft mean when it comes down a strong air stream and forms a layer of air cushion between the bottom of the ship and the water? Why is it possible to reduce friction?
The upper velocity is small, and the pressure below is greater than the pressure above, resulting in an overall upward pressure difference,To produce an upward lift, the friction between the bottom and the water becomes smaller
The hovercraft uses compressed air to disengage the hull from the surface of the water, thereby reducing friction
The force of the air feed force itself receives the reaction force, floats, and then the friction surface changes from water to air, the friction surface becomes smooth, and the friction is reduced
