The CD hovercraft is a tried-and-tested Make, but technological improvements have tended to be in the method of connecting the balloon to the CD. I have attempted to apply some of Sir Christopher Cockerell's original developmental research to this old favourite.

Step 1: Materials and Tools

In addition to the basic materials (an old CD, a balloon and a plastic bottle cap and hot glue), you will need a sheet of paper or light card, a thin sheet of expanded polystyrene, ordinary glue and a sharp knife.

The type of glue is not vitally important, since it will not be under any strain greater than the weight of the polystyrene and paper. If you use a water-based glue, though, try and be very sparing with it, as excess water will make the paper "cockle" and cut the vehicle's efficiency.
Word File Can't Be Downloaded <br>
(Thanks - I've submitted a bug report)
These are really fun to make. I recognize that set of craft knives, i bought mine for 99c at a discount store and most of them broke in a week. How did yours hold up?
Fine, I'm still (ab)using them.
Wow. Maybe i am just more prone to breaking things.
Hummmm, <br><br>Quote: &quot;being careful not to clean off any &quot;ooze&quot; before it dries: &quot;<br><br>Perhaps this is one reason it would not &quot;fly&quot; as wanted.
If you have a source of dry ice, a small plastic bottle of dry ice chips would last longer than the air in a balloon. The original version of this gadget is the &quot;dry-ice puck&quot; that's been used in physics classes for almost a century. It has a thick, polished steel puck instead of the CD, and a copper ball (remember copper toilet-tank floats?) to hold the dry ice. With that much mass, it would glide *slowly* for several yards without visibly slowing. One of these days I may dust off my old Unimat lathe and make one.<br/>
That is true, of course, but most readers won't have access to lumps of dry ice.
buy them at Ralphs?
this is the latest in self propelled balloon hovercraft technology <br/>(klik linc) <br/><a href="http://www.instructables.com/id/the-better-cd-hovercraft/">http://www.instructables.com/id/the-better-cd-hovercraft/</a><br/>
I've tried this the "Original" way, and I think it worked better than yours, any ideas why? I thought that yours would go better, oh well, better luck next time.
replace the cd with another piazza base more power or smaller hole longer run
do you kkow where polysterine can be found in a house? where i live, we don't have that kind of pizza stuff. Alos, is there anything else i can use? thanks
isnt styrofoam polystyrene?
Yes. It's clear that you want polystyrene foam, aka styrofoam, and not solid polystyrene. Open-cell foam (the original Styrofoam) won't work here, because it won't hold air. Closed-cell foam, used in disposable cups and plates, is what works.
Ceiling tiles? DIY stores sometimes sell thin sheets of expanded polystyrene as insulation (maybe to go behind radiators), craft / modelling stores will sell it as a modelling material, or be able to advise on other alternatives.
oh! i found something! maybe a styrofoam meat tray. Mine had chicken :)
That's fine - as long as it'a big enough to cover the CD.
ok, i might try something i can find
dude no way i have the same blade kit thing as you soz i am a bit lame...
This seems... too complicated... it seems your air channels actually allow too much air coming out too easily, decreasing run time. I'm not sure, but maybe...
The excess air-flow seems to be through the central hole, which is why I restricted it there.<br/><br/><em>However</em>, v2 will involve few/narrower channels from the centre to the edge, a change of glue and possibly plastic to cover the bottom instead of paper.<br/>
Hot glue dries a matter of minutes, if not seconds...
But its not low-friction. You need something that will be smooth.
It says you need ordinary glue, it can be used the same way as normal glue.
I couldn't use hot-glue on the base because the gun melted the 'styrene and it cooled <em>too</em> quickly, before I got it completely smooth.<br/>
Ah, gotcha.
Wow! Five projects for one contest, and all fantastic!
I seem to have had a rush of blood to my 'ibles, don't I? It could have been six, but the local plumbing supplies stores all close on Sundays. That will have to wait, now - I have costumes to make!
fuji film rules !!!!!!!!!!! and its not badly printed
The <em>balloon</em> is badly printed.<br/>
Then why is there a big bubble of "FUJIFILM" missing?
Kite you must want that prize , I started a tater launcher-gold bearing gravel sucker for this contest but cant get to my tools to cut/round off some parts (garage is full of someones couches and such)good luck and do a new vid when it is done , I will have some of the kids at school make a few of these
I believe this instructable calls for liberal use of the ubiquitous double-sided sticky tape! Excellent instructable, I like the design mods to the classic cd-hovercraft. Pity you had to rush it at the end there, though. Waiting anxiously for an update, lol

About This Instructable


31 favorites


Bio: The answer is "lasers", now, what was the question? If you need help around the site, or with a project, feel free to contact me ... More »
More by Kiteman: The Snake Ladder KiteFamily Projects Laser Cut Wooden Bow Tie
Add instructable to: