What are hovercrafts? Are they:
Without lift, hovercrafts would be useless.
Propellers shoot air down at the surface of the water or the ground to lift the hovercraft a
few inches. Hovercrafts use something called a skirt to hold air inside
the area underneath the vehicle. The
skirt must be the perfect length and weight otherwise air would escape
from under the vehicle, and the hovercraft could hit the ground. I personally would not want to be on that hovercraft.
Hovercrafts need a lot of power to turn all their
propellers. In fact, they
need two engines. One turns
the propellers that
make it lift off the ground. The other engine turns the propellers that push the vehicle in the
direction it wants to go.
Hovercrafts have many uses. Some of them include:
The concept of a vehicle that could ride on a
cushion of air has been around for almost three hundred years. However, it was a British inventor in 1952 that turned the
concept into what we know today as the hovercraft. The first hovercraft that could carry passengers came out in
1961. By 1970, very large
hovercrafts were carrying passengers and cars across the English
Channel. Today, many people
own their own small hovercrafts and mostly use them for their own
"History of the hovercraft." Gizmo Highway Technoligy Guide. 28 December 2004 <http.//www.gizmohighway.com/history/hovercraft.htm>.
"Hovercraft." Springhurst. 28 December 2004 <http://www.springhurst.org/students/hovercraft.htm>.
"What are Hovercrafts." Quick Tech Hobby. 28 December 2004 <http://www.quicktechhobby.com/Hovercrafts/what_are_hovercrafts.htm>.