# Wanted to build a hovercraft

1. Mar 22, 2003

### Nicool003

I have wanted to build one quite a few times and one ofmy friends showed me a good website and it is a $50.00 one if you buy used components and it looks pretty good but we would have to set up our own propelling system because it moves pretty slow can't remember the exact speed.... So all in all it would cost maybe$150.00 with some new components and a new propelling system. Is anyone else into these things? I found a good website for them but they cost thousands of dollars...

2. Mar 22, 2003

### emu

The center of mass should be centerred on the platform. The skirt should be of contructed of robust materials.
The theory is fairly simple and hovercrafts do not require large engines just to float. Inflate the skirt to sufficient pressure then blow air into the cavity formed also at sufficient pressure. This engine should always run at the same RPM and might require some tweaking to get it hoverring safely.

Once all of that is done, propulsion is up to you. My preferred method would be to have 2 small engines on each side of the craft. That way turning can be done on the spot. You do not want to be driving a hovercraft like a rally car, you will hit something at great speeds or have one side dip down low enough to catch the ground.

I remember watching an episode of junkward wars where they built hovercrafts for single riders. They both worked and managed to achieve rather good speeds.

3. Mar 23, 2003

### Nicool003

Wow you seem interested. Is this speculation or do you have one or are you expecting to get one???
(or build one)

4. Mar 24, 2003

### arivero

AFAIK, the faster way to build one is to ask your neighboor for his leafblower... that is power enough for an individual hovering. Check google.

5. Mar 24, 2003

### Nicool003

Yes that is one way. They also say an old or used (or you could even buy a new one) vacuum cleaner motor could give enough power for individual hovering. One of the plan I looked at could hold up to 250 lbs ( I believe it was it might have been 200)

6. Mar 27, 2003

### Zeth22

Could you use 2 rotating fans used in the home to propell and steer the craft?

7. Mar 30, 2003

### Nicool003

Well I think it would be possible but it wouldn't proppel you very fast. The two combined could but if you are using one to propel you and the other to decide your direction you would be moving slow. If you had them pointing in the same direction at all times then I suppose that could work but I am not a professional.

8. Mar 31, 2003

### Zeth22

yeah well i'm no expert either. So that doesn't get us very far does it.

9. Apr 1, 2003

### Nicool003

No but I have a strong feeling I am right. Think about it. Those fans aren't very powerful and if you include the hovercraft and your weight it could have to move anything from oh say 250 lbs up.

10. Apr 2, 2003

### emu

Consider this, 650 watts= 1HP.
A 100 watt fan has less power consumption than a 1/6 HP motor. This is not a lot of power.

Besides, propellers are much more powerful than plastic fan blades. A decent gas motor, maybe a small engine from a dirtbike, should have more than enough power to lift the craft off the ground. A second motor of about the same size would be needed to get to speeds over 20 mph. Now you have the mass of the craft, rider and 2 motors to conted with. Although a Shop-Vac, some plywood and some plastic and you can have a human hockey puck. Bring the shop vac on the craft with the rider. This type of craft probably could be propelled by a strong fan(the 3 footers you sometimes see in gyms and the likes) to breakneck speeds. Need I emphasize you really can break your neck if the craft suddenly decelerates. There are no airbags or seatbelts. Hmmm, no airbag eh?

Damn, I feel like building one myself. Too bad good propellers can't be had for cheap.

11. Apr 2, 2003

### Nicool003

I have looked at many many websites and I found three good ones. Zeth and I use two of the same he sent me a third and I sent him a third... Well anyways I found some very good ones. If you go to universal hovercrafts (www.hovercrafts.com) they are far too expensive. The beginner set alone is 500-600 which I think is too expensive when you can build your own for probably $50-$100. And if you look at universal hovercrafts advanced and intermediate suggestions they get into teh thousands. But I still like looking at that site

12. Apr 7, 2003

### kleinjahr

13. Apr 7, 2003

### Nicool003

pretty cool! And Kleinjahr it's good to see you!

14. Apr 11, 2003

### arivero

restform

An inflatable bed such as the "Restform" could be a way to get the frame. Just pop some holes under, and plug the engine :-)