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My first cannon

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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My first cannon

Unread postAuthor: x.X.Cpt.Rollhart.X.x » Thu May 18, 2006 7:20 pm

This is my cannon ...

chamber is 24" long of 4" SCH40

The barrel is 36" long of 2.5" SCH40

Modded sprinkler valve and ... thats it :wink:


Image

Image
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Unread postAuthor: cannon freak » Thu May 18, 2006 7:34 pm

How fast, and how far can it shoot.
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Unread postAuthor: Andrew52 » Thu May 18, 2006 7:50 pm

you know often people ask that question and often they never know/anwser because most people dont have a chronograph i know theres a ggdt and for a gun of that size i doubt they will be measureong it
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Unread postAuthor: jrrdw » Thu May 18, 2006 7:51 pm

Nice, no presure gauge, you a good guesser? i'd be worring about over fill.
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Unread postAuthor: Andrew52 » Thu May 18, 2006 8:00 pm

well most aircompressors have regulators or they go up to 125 psi which is safe
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Unread postAuthor: x.X.Cpt.Rollhart.X.x » Thu May 18, 2006 8:12 pm

jrrdw wrote:Nice, no presure gauge, you a good guesser? i'd be worring about over fill.


there is no schrader valve too ....

only cause I need to buy my schrader valve and my air gauge tomorow ...

and i will do a nice Paintjob :)
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Unread postAuthor: Andrew52 » Thu May 18, 2006 9:03 pm

i bet u wish u could shoot that do u have any tennisballs to shoot
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Unread postAuthor: x.X.Cpt.Rollhart.X.x » Thu May 18, 2006 9:08 pm

Andrew52 wrote:i bet u wish u could shoot that do u have any tennisballs to shoot


I dont want to shoot tennisballs ...
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Unread postAuthor: CpTn_lAw » Sat May 20, 2006 5:58 pm

your cannon is pretty heavy, isn't it? What are you going to shoot with this cannon?
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Unread postAuthor: x.X.Cpt.Rollhart.X.x » Sat May 20, 2006 9:04 pm

CpTn_lAw wrote:your cannon is pretty heavy, isn't it? What are you going to shoot with this cannon?



I am not authorize to talk about what i will shoot (because of the rules of the forum) ...
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Unread postAuthor: Darkside 6ix » Sat May 20, 2006 10:31 pm

NO retard

PCGUY was talking about solid propellants. such as a solid combustion fuel, such as black powder.etc. :)
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Unread postAuthor: Flinchy » Sat May 20, 2006 10:41 pm

you really don't want to use solid propellants in cannons, sometimes igniting them will make them expand too rapidly which will possibly break the pvc creating shrapnel. ha, the cannon im currently playing around with looks very similar to that design, except with a 1.5inch barrel and a 3in chamber. make sure your schrader valve is threaded, and get alot of teflon tape. you can put the schrader valve almost anywhere on the cannon but i'd suggest putting it right through the thickest part on the tip of the endcap. that way it won't rip off of your cannon from high pressure. :wink:
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Unread postAuthor: SpudStuff » Sat May 20, 2006 10:52 pm

Yes i just read that standare dynamite ignites at ~24000 FPs
whatever that meant but it sounds fast
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Unread postAuthor: boilingleadbath » Sat May 20, 2006 11:24 pm

Spudstuff, I point out that:
*that's the VoD (velocity of detonation), which is calculated for an infinitly large diameter charge.
*NG doesn't burn very well, tending to go out
*It takes a bit of run-up time to reach that velocity even if explosivly set off.

And yes, the 24,000 fps (who the f gives VoDs in FPS? <i>Everyone</i> gives them in m/s...) number seems about right.
And a proper detonation - or even an overly fine powder - tends to cause failure in real-steal firearms.

Also, that avatar distracting, not terribly well animated, and really pissing me off. Take whatever action seems most proper considering this.
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Unread postAuthor: Brian the brain » Sun May 21, 2006 12:02 am

I would'nt shoot gunpowder out of a pneumatic either!!!
Useless discussion.He probably meant he was gonna shoot animals or damage some of "OPP"
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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