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Cannon Poll

A place to ask general spud cannon related questions.
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What do you think is better?

Air cannon
4
100%
Combustion Cannon
0
No votes
 
Total votes : 4
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Cannon Poll

Unread postAuthor: Matt221985 » Thu Jun 07, 2007 11:03 pm

what one do you think is better?
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Unread postAuthor: hi » Thu Jun 07, 2007 11:48 pm

pneumatic cannons ( with the right valve) are way more powerful.
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"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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Unread postAuthor: Matt221985 » Thu Jun 07, 2007 11:50 pm

yea, my brother was saying that combustion was better, but air all the way for me, this is the best gun ive built, i have a combustion but never use it now that i have an air one.
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Unread postAuthor: jackssmirkingrevenge » Thu Jun 07, 2007 11:51 pm

It depends what you want, "better" for what?

Combustions are easier to make and not so demanding on the materials front, but when it comes to sheer power there's no contest, pneumatic is the way to go.
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Unread postAuthor: Matt221985 » Thu Jun 07, 2007 11:52 pm

thats what im going for is power, more damage to stuff..lol
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Unread postAuthor: turbohacker » Fri Jun 08, 2007 12:14 am

The only thing a cumbustion is better than a pnumatic at is blowing up and making a lot of noise when firing. You can stll get a good amount of noise out of a pnumatic if it is very large and a piston though :twisted:
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<-- This is not a cat avatar

If it walks like a dog, sratches like a dog, and barks like a dog, than its probobly a...-TURTLE, it's a TURTLE!!! Cant you see?!!!

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Unread postAuthor: Matt221985 » Fri Jun 08, 2007 12:17 am

yea, very true, my pnumatic is pretty loud. Loud enough for me anyway. Makes a good boom. Combustion ones are no longer fun for me after building a pnumatic one.
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Unread postAuthor: MrCrowley » Fri Jun 08, 2007 12:18 am

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Unread postAuthor: Velocity » Fri Jun 08, 2007 12:18 am

This same question has easily come up at least fifty times in this forum... possibly more!

Both combustions and pneumatics have their pro's and cons. Combustions only generate around 40 PSI, and therefore do not have the raw potential power which pneumatics do. However, they do not have a valve, meaning unrestricted flow, and therefore are great to use on larger bore launchers. For spudgunning purposes, the largest valve size which is commonly built is 3" porting (OK, there have been 4" porting coaxials, dual 3" sprinkler valve cannons, and 10" butterfly valves on pumpkin chunkers, but that is very rare). Therefore, a combustion is much better than pneumatics for barrels above 4". If you are a spudgunner who can't make a homemade valve and the best valve which you have access to is a 1" sprinkler valve, then combustions beat pneumatics with barrel sizes of 1.5" and above.

Pneumatics involve compressed air, and can generate much more pressure in the chamber. The average pneumatic is generally taken up to around 100-125 PSI at the maximum. For small bore launchers, combustions don't stand a chance against pneumatics. The factors which limit the power of a pneumatic are the valve size and the pressure rating of the components of the chamber. The bigger the valve, the faster the air can be dumped, and the more power. The higher pressure that the chamber components are rated to, the more air pressure that can be safely be put into the chamber, and the more power.

Sorry for this broken up post; i'm kinda tired right now.

EDIT: IDEA!! I think we should make a thread, listing ALL of the pros and cons of pneumatics and combustions, and then sticky it. Finally we will have a single definitive source! Who's with me?
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Unread postAuthor: Matt221985 » Fri Jun 08, 2007 12:29 am

so pnumatic being powerful, can u put a spud thru thick plywood like u can with a combustion ?
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Unread postAuthor: MrCrowley » Fri Jun 08, 2007 12:34 am

You can put anything through plywood with a pneumatic.

You don't understand. Pneumatics and Combustions have not *set* power. They are all different. Please stop making topics like this. They both have advantages and disadvantages but pneumatics can be more powerful then a propane metered combustion if they are built right. Alright. Search it. Check out the wiki.
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