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More Powerfull?

A place to ask general spud cannon related questions.
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What is more powerfull and better?

Combustion Gun
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Air Compressed Gun
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Hybrid
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Hybrid
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More Powerfull?

Unread postAuthor: Devilsmed98 » Wed Sep 07, 2005 7:59 pm

I was wondering what is the most powerfull type of gun because my friend said that his 3 foot long air pressured gun can beat my 6.5 foot long combustion gun. Is he right or is he just trying to win this argument? And can anyone give me a hint or tell me what a hybrid gun is i keep seeing it everywhere over forums but i don't know what it is. Is it like a sorta combustion/air gun? post back
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Unread postAuthor: me78569 » Wed Sep 07, 2005 8:31 pm

well the hybrid gun is deff the most powerful but to complex and costly for someone like me to build so i will stick to the middle and say phuenmatic wins for praticality. my 3'x3" chamber 6'x1.5" barrel dishpan gun can put a spud 200-300 yards in a hurry.
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Unread postAuthor: Devilsmed98 » Thu Sep 08, 2005 5:39 am

ok thankyou for telling me but what exactly is a hybrid gun?
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Unread postAuthor: b-nice » Fri Sep 09, 2005 8:13 am

hybrid guns are very dangerous. after reading what happened to you i highly suggest not venturing into hybrid guns. a hybrid gun would have killed you if you were holding it like your other gun. Hybrids use propane and compressed air. propane has to be between 3-5% of the volume of your chamber to ignite this is a regular combustion. hybrids use 2,3,4,5 times the propane as a regular combustion. you inject enough compressed air to bring the extreme amount of propane back to 4%. this leaves you with a large volume of propane and a pressurized chamber witch produces vastly more power than any gun possible.
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Unread postAuthor: boilingleadbath » Fri Sep 09, 2005 2:37 pm

well, 3*105=6.5*50 (ok, just about)
Meaning that, chamber volume asid, they are almost exactly as powerful as each other.
(the 50 is the pressure of the combustion gasses, roughly, and the 105 is the pressure he would have to pressurize it to to be as powerfull, valve efects ignored)

This means that the pnematic will beat it*, as it almost certainly has a much oversized chamber.
(*for not for light loads, below maybe 20/g/inch<sup>2</sup> - otherwize valve flow-restriction effects become quite important.
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Unread postAuthor: sjog » Thu Mar 01, 2007 10:14 pm

My air powered gun has a chamber 34 " X 4" w/QEV shoots a gb 400yds.
My MAPP powered gun w/18 " chamber shoots a gb 500+ yds.
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Unread postAuthor: TwitchTheAussie » Thu Mar 01, 2007 10:20 pm

I'd say a steel walled combustion with oxy, propane and nitrous oxide as fuels. What can I say? The bigger the boom the more fun yet scarily dangerous it is :twisted:
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Unread postAuthor: Hotwired » Thu Mar 01, 2007 10:21 pm

In order of power and inverse trouble to make and use:

Hybrid, Pneumatic, Combustion
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Unread postAuthor: sjog » Thu Mar 01, 2007 10:59 pm

Pneumatics are just plumbing
Combustion, wiring is involved too+ gasses
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Unread postAuthor: Hotwired » Thu Mar 01, 2007 11:09 pm

Its just a generalisation of the basics needed for each. Its possible to make a combustion thats more complex and powerful than a hybrid if you really felt like it.
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Unread postAuthor: frankrede » Thu Mar 01, 2007 11:23 pm

No its not, a hybrid essentially is a combustion its power is from combustion so therefore a hybrid and a combustion of equal sizes teh hybrid will out perform the combustion.
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Unread postAuthor: SpudBlaster15 » Thu Mar 01, 2007 11:35 pm

Unless the combustion gun uses a stochiometric mixture of acetylene and pure oxygen...
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Unread postAuthor: frankrede » Fri Mar 02, 2007 12:49 am

Thats a big if and that would be one hell of a cannon.
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Unread postAuthor: TwitchTheAussie » Fri Mar 02, 2007 1:14 am

And thats going to be my yr10 science project :D seriously
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Unread postAuthor: SpudBlaster15 » Fri Mar 02, 2007 1:47 am

frankrede wrote:Thats a big if and that would be one hell of a cannon.


Yeah, you would need a thick, welded steel chamber, which is quite expensive and difficult to build properly. I plan on making an oxy/acetylene cannon sometime in the future though.
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