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How does a hovercraft skirt work?

I know that it traps the air underneath until the pressure is enough to lift. But does the lift engine push air into the skirt? and are there holes in the skirt on the inside for the air to be pushed out?

Yes, the lift motor pushes air into the skirt, and there are holes on the inside, at least on big skirts
Some very small hovers ingeniouesly use a diverted air stream off the main pusher prop to fill the skirt.
I lemonie's wake, what would you call a hovercraft a she or a he ?:-)
skaar iceng3 years ago
some large ones use the diverter system too, but, that's like, 16' length, largest i've seen plans for. as to gender, on land, they're considered atv's, i don't think they're called by gender, but on water they have to be registered as boats(in some places require licenses, as that's usually based on engine power), and boats are usually she.
Answer :- making hovercraft skirt

Preface
My first skirt was constructed entirely by hand using 16 oz./sq.yd. neoprene coated nylon and vinyl coated nylon materials. The geometry of the curves posed some difficulties due to the fact that adjacent pieces needed to overlap by 1" in order to attach them properly.

Making the Skirt
Upon reflection, this should be the easiest part of the craft to make. Go out and acquire an old rubber liferaft of the proper size. For the purposes of this project, a 5 meter raft will do. It does not matter if the raft is damaged in the tube, although any leaks in the bottom will need to be repaired.

Turn the liferaft upside down. There, now you are done. This will serve very nicely as a skirt system.

The next stage is to lash it down to a frame that will support the shape of craft and help to stabilize the prop/engine housing. This frame can be built out of most anything, wood and/or hollow aluminum tubing will work just fine.
YES !
lemonie3 years ago

The air escapes underneath, but the skirt is usually designed with pockets to maintain good all-round inflation - there are holes in there.

L
rocketman20 (author)  lemonie3 years ago
So could I use something like a tractor inter tube, I want to make it the size of the white hovercraft that is posted on Instructables (10 HP Hovercraft) I plan on using a 13 horse engine. On that big of a hovercraft how many holes should I use.

As you've selected a best answer, I'd go with them. You've had most of my knowledge on the subject.

L
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