Hovercraft Science Project

Hovercraft Science Project

Hovercraft Science Project

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Hovercraft $34.99 English School Hovercraft - Giclee Print

The Hovercraft $49.99 Wilf Hardy The Hovercraft - Giclee Print

Science Project Business Letterhead $32.95 Science Project Business Letterhead

Science Project Large Magnets $20.95 Science Project Large Magnets

Science Project Business Cards $5.95 Science Project Business Cards

why do hovercrafts lift off the ground?

I am making a hovercraft for my science project this year (im in 6th grade) and i cant find why the hovercraft stays off the ground. I am using a plywood circle, a sheet of plastic and a vacuum flipped to blow. Anyway, so i want to know how it floats. PLEASE do not tell me that it is "the skirt effect" because i want to know how the skrt effect works.

The skirt around the edge, combined with the air being blown is what makes it float. Without the skirt the air would just disperse instantly and it wouldn't float. The skirt holds the air in long enough for it to build up a positive air pressure cushion that "floats" the hovercraft. As to how you get more people with a bigger circle of plywood just draw a small circle on the ground and see how many people can stand in it. Enlarge the circle and see how many people can stand. But putting more people on it doesn't mean you can lift them all. That depends on how stout your air supply or blower is. Good luck with the project.