The hovercraft is designed to travel over any kind of surface being supported by a cushion of pressurized air. Most hovercrafts use at least two engines that are connected to large fans in a similar way to the propeller of the aircrafts. One is used to generate the vertical airflow responsible for lifting the vehicle by blowing air under the craft. The air therefore exits throughout the skirt, lifting the craft above the area on which the craft resides. The other engine is used to generate thrust and horizontally steer the hovercraft and can either have airplane-like flaps to direct the air or they can move themselves in order to change the direction.
Hovercraft runs on two main important functions, lifting and propelling. The craft is lifted above the surface with the help of a giant fan that creates a massive air draft in the downward direction which pushes the craft up wards. The lift can be of a few centimetres or even inches. The fan is moved with the help of an engine which is located at the rear of the craft. To quarantine the air underneath the craft a flexible rubber skirt is used. This skirt prevents the escape of air from beneath the craft and flexible rubber allows it to move over any obstacle in the way. The skirt has small holes to allow the air to escape, which also helps the craft to move. The edges of the skirt are made of extra thick rubber to create a seal between the skirt and the surface, which prevents the escape of air and also to reduce wear and tear due to the constant contact with the surface.
It uses a skirt which is required to trap the air under the air cushion and this is done in order to create pressure under the hovercraft which forces the vehicle off the ground. Attaining the proper amount of airflow is imperative for the maintenance of the craft?s stability.
A hovercraft works by forcing air downward underneath the boat apparatus. The sides of the apparatus have skirts which equalizes the airflow and evenly distributes it to lift the apparatus.