GBeast Cannon

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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grendal
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Thu Oct 26, 2006 12:45 pm

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Wide View of Cannon
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View of Fan and Dual ignitors
ImageClose Up of Control surface

Please let me know what you think would welcome advise-I am going to start work on a pnematic one next
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LucyInTheSky
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Thu Oct 26, 2006 2:25 pm

I usually don't like the look of PVC, but when its painted that well it looks great.

Is that a stungun ingnition?

What width is the barrel and chamber?
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grendal
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Thu Oct 26, 2006 3:04 pm

Thanks for the comments-
The ignition is simply a grill ignitor that I split to three points . (I have been experimenting with a converted disposable flash but haven't gotten as hot a spark as with a grill ignitor.)

The Barrel is 1.5 "
The Chamber is 4"

It makes one hell of a boom with Aqua Net.

The box holds a fan circuit that runs for about 20sec when pressed. It is housed in what is best described as an Altoids tin.
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mark.f
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Thu Oct 26, 2006 3:32 pm

Nice first gun! Metered propane is a great plus, but I definitely give you brownie points on seeing the pluses of a fan, even with hair spray.
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nicholai
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Thu Oct 26, 2006 3:46 pm

nice cannon dude, i like the paint job
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grendal
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Thu Oct 26, 2006 4:24 pm

Thanks
I am considering propane-This was a small comission for a friend who paid me for expenses so i did not want to go to pricey. I would appreciate advise on what next. Should i go for a propane fueled gun with a stun gun ignitor or try my hands at pneumatic? I do like the hell of a bang that comes from combustion. But would like the power of pneumatic. I really like building them more than firing so I'd have to find someone to sell it to. I'd just sell it for cost so i could go on to the next stage.

Mark that is one wicked gun in your avatar-That barrel looks better than six feet?
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mark.f
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Thu Oct 26, 2006 4:27 pm

It's five feet of 2-1/2" SCH-40.
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ammosmoke
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Fri Oct 27, 2006 11:11 am

What makes you think pnumatics don't go boom?
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Fri Oct 27, 2006 7:38 pm

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Last edited by SpudBlaster15 on Wed Jul 14, 2021 11:29 am, edited 1 time in total.
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grendal
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Mon Oct 30, 2006 9:22 am

Oh I do expect the pnuematic powered cannons to go boom. I'll add longer barrel and more precision combustion chamber to number three cannon.

Thanks
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zeigs spud
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Mon Nov 13, 2006 4:16 pm

ammosmoke wrote:What makes you think pnumatics don't go boom?
a good filling BOOM at that lol...
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MisterSteve124
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Mon Nov 13, 2006 7:10 pm

Nice cannon for your first. The paintjob looks awesome. I would just recommend not using hairspray just about anything is better than that. What size fan is that? Where did you get it?
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grendal
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Wed Nov 15, 2006 10:03 am

Thought i posted this reply already but it does not appear-sorry if repost.

What fuel do you reccomend? I intend making a propane after the pnuematic. I gave this one to my friend Gbeast so i don't want to mod the gun but if there is a better spray fuel I'd like to recommend it to him,

Anyone tried aersolized alcohol?

The fan is puchased from Radio Shack. It is a 12 volt model a little under 2" in diameter.
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MisterSteve124
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Wed Nov 15, 2006 9:16 pm

Right Guard, Axe, Old Spice they all work well and the right gaurd has to be the old formula mine says 1998 on the can.
Cosmo
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Fri Jan 19, 2007 5:55 am

nice job I recon u should decrease the diamater of the barrel and enlarge the combustion chamber though. If u can
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