A burst disc make a lot of noise, I have a little 3/4" burst disc Here that makes a big bang.

Insomniac wrote: Seriously though, I'm not sure I'll believe this until I see it done by some other source... I get the feeling they've added somthing like an alcohol or other substance to the pepsi to make it burn.

MobilChernobyl just tried it and he said it worked. Read the posts...

I found this while looking for automatic air cannons on youtube
[youtube][/youtube]

Possible design for Dog owners?...

killerbanjo wrote:

Ranger wrote:Well, according to the drawing the rear piston is *slightly* larger than the front one. Wether(correct spelling ) that will be enough is questionable.

Oh right, they were ment to be the same size but im tired and should be in bed

I'm trying to help. Shhhh

you need to make the rear part of the piston larger in diameter for this to work..... If you mean because the whole piston will fly out of the front of the gun) more of it won't move at all, there are equal areas on the front and back Well, according to the drawing the rear piston is *slightly* lar...

At first it was only a semi auto design, and I was going to rape you

But now I can see how its a fully auto design, very good idea...

*If* we are talking about coaxials designed on the principles Here (the third animation) Then the chamber (the one that supplies air to the barrel, not the pilot area) cannot be longer than the barrel. In a *standard* coaxial, the barrel cannot be shorter than the chamber. Technician, we are talking...

Its a cylinder volume equation

Formula for finding the volume of a cylinder : pi * radius2 * height

I go Here and it makes it much eaiser

How can you make the barrel shorter than the chamber? They either have to be the same length or the barrel has to be longer. Think about it.

That should be good. I ran the numbers with a 36" barrel and 32" chamber and came out with a about 2:1. Ahh, but you forget to subtract the volume of the barrel inside the chamber from the volume of the chamber, so you probably get a ratio closer to 1:1 I hope my math is right Barrel: 1"x36" = 28 c...

LOL I see a future hobby for you...

That should be good. I ran the numbers with a 36" barrel and 32" chamber and came out with a about 2:1.

What are necco wafers? Where can I buy them?

If you are in germany, how did you learn to speak english? I'm appalled by this question, if it was a serious one. Ranger, is this how poor your world view is? After reading how I typed it, I feel ashamed :oops: It was meant to be a simple question about why he is speaking english (very good englis...

Cool. I did the same thing with an old air bottle, however I only fill it to 100 psi though because its really old.

[quote="Gun Freak"]love how you say "for shure" at the end
quote]

I was thinking the same thing...