hovercraft travels over land and water on a cushion or
bubble of low-pressure air. A hovercraft has one or
more blowers that blow air underneath the craft, which is
contained by a skirt. The skirt that is around the
perimeter of the hovercraft performs an extremely important
function in containing the air cushion. By using a
skirt, the amount of engine power required to lift the craft
is considerably reduced and as an added benefit, extra hull
surface clearance is obtained. The skirt is a long
strip of material that is mounted onto the underside of the
craft. When the skirt is inflated, it lifts the
hovercraft. The escaping air coming from where the
skirt touches the ground is what creates a friction-less
cushion of air. Because the hovercraft has practically
no friction, it takes little force to move the craft.
diagram above shows the basic principle of a hovercraft.
Air is directed underneath the craft by a blower, and the air that
escapes out of the flexible skirt creates a near frictionless
environment which enables the craft to hover. The craft can move
forward and turn by using propellers to propel the craft.
hovercrafts shown on xinventions either use a leaf blower of
vacuum cleaner engine for lift. The larger hovercraft
uses an engine for propulsion while the smaller hovercraft has
none however one can easily be attached.
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