Keep in mind though with the personal fans though when you turn them on sometimes they spark because of the brushes on the inside of the fan, a normal computer fan is brushless so normally there is no spark. At least this has been my exp. I turned on my fan on one of my combustion cannons and it fir...

So I just tested the gun and it WORKS Thank you so much Mr. C.
Ugh now I have to go write the 4 page paper about it that's due in 5 hours.

For the black rubber it's just a neoprene washer from the store. The brownish orange rubber I cut from a sheet with scissors. Than i glued them down and took a sanding disk that attaches to a drill clamped the drill down than I turned the drill on at a constant speed and spun the sealing face at an ...

Thank you for the kind words I'll post the finished product when i'm done. That is if you guy's want me to.

That's pretty awesome that we came up with the same idea . I thought I was being original oh well. I just drilled out the hole i'll get back to you tomorrow after some test fires.

PS. Thank you so much for the help MrCrowley. Wouldn't expect some one with that name to be so nice

If I remember correctly when I took a computer class it allows you run windows on a you mac so you can use both the mac os (operating system) and the windows os. Now I don't know if you want to do all of that just to run the program. You could check craigslist or ebay for a hella cheap xp computer f...

hmm....I don't know much about macs but you could run boot camp. (I think but i'm just trying to help and put options out there)

You could be flooding it with to much fuel. Try 1 second than increase by 1 second each time you fill up. Be sure to air it out between each filling. Try using axe it doesn't condense or get sticky. And you can look into making a spark strip to make ignition easier

Have you seen this design before? I thought it was pretty original but I guess not. My piston does not have orings the thought was that the increases surface would help with opening times (mentor/uncles crazy engineering idea) Actually yes there is a very small hole in my bumper becuase i though it ...

From what I understand is that it does not work on a mac.

chamber aprox 70 inches long x piston 4.8 cm x 7.6 cm piston housing aprox 4.88 cm x 13 I have not used the barrel but it is a tennis ball barrel. It is 5ft long http://i864.photobucket.com/albums/ab209/Cory_074/DSC03376.jpg http://i864.photobucket.com/albums/ab209/Cory_074/DSC03375.jpg http://i864....

That was fast. Can you list the specs you want because thats a very general question.

Hi guy's, well I just about finished my cannon for my senior project. It's a two inch barrel sealing piston valve. It's piloted by a 3/4 inch ball valve (I had a sprinkler valve on it but it wasn't working at all, I just want it to fire now and worry about that later.) I've been having some issues w...

Thank you so much for you help guy's Just 2 more questions and I promise i'm done. Where can i go about purchasing these materials and how much is the cost gunna run? Thank's again

Alright so I have a couple more questions for you guy's. What should i make my piston for my co2 cannon out of? I have access to a lathe and many other tools. I was thinking delrin or teflon but if you guy's have any other ideas i'd be happy to listen. Also what should the dimensions be (mostly inte...