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The Big Bang...

Built a combustion 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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Unread postAuthor: lukemc » Sat Mar 10, 2007 11:59 am

i made a carbide cannon a while back its fun to mess with. i use calcium carbide powder and it is much more explosive than rocks. its so loud if you get the right mixture.
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Unread postAuthor: iPaintball » Sat Mar 10, 2007 12:16 pm

Thanks for your concern CpTn. The chamber was made from sch 80 pvc wrapped in a couple layers of duct tape. (I was really safety conscious because of an article I read about a guys chamber exploding and blowing out his ear drums...) The cannon could withstand a large amount of pressure before failing, so I believe I was quite safe...
P.S. Scope it's calcium carbide
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Unread postAuthor: SpudBlaster15 » Sat Mar 10, 2007 12:18 pm

Scope wrote:If you introduce calcium carbonate with water in a sealed container you would be breaking apart oxygen from both the calcium carbonate and the water... this would mean it would produce an oxygen rich environmentc... not pure oxygen but it would raise the levels...
calcium carbonate (CaCO3) + Water(H20) = Acetylene(C2H2)
this means that byproducts of producing C2H2 would be Calcium (Ca) and Oxygen (O2).... Actualy a good amount of oxygen... i could tell you how much if i balanced the equation... but im to lazy right now.. if anyone wants i will


This statement is completely wrong. Please go back and take an 8th grade science class. Calcium carbonate does not react with water, which is why calcium carbide is used in the reaction.

CaC2 + 2H2O -> C2H2 + Ca(OH)2

No oxygen is produced by the reaction, however, as willarddaniels stated, acetylene can combust given an atmoshpere with very little oxygen.
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Unread postAuthor: LGM » Sat Mar 10, 2007 4:40 pm

Where does one calcium carbide outside of exposing calcium oxide to an electric arc with carbon electrodes?
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Unread postAuthor: iPaintball » Sun Mar 11, 2007 8:03 pm

LGM, go to calcium-carbide.com. It's $12 for a one-pound pail.
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Unread postAuthor: chaos » Tue Mar 13, 2007 3:21 pm

hmm...... i feel like trying this in an oxy rich environment.
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