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...Demetrios...Or just mapp powered cannon.

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: octane89 » Sun Dec 16, 2007 1:57 pm

I will do that now actually-painting is delayed due to 2+ feet of snow we got last night and its still blowing pretty hard outside.
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Unread postAuthor: gwoloshyn » Sun Dec 16, 2007 2:35 pm

Great cannon, great paint work, nice and clean, I love it! I especially like the power that fan puts out. Keep up the good work man. I'm currently working on a really sick combustion that I will reveal in a couple weeks for everyone.
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Unread postAuthor: LikimysCrotchus5 » Sun Dec 16, 2007 3:18 pm

Yea i know how you feel octane. Here in Cleveland (Ohio) We are getting the same snowfall. Its a blizzard out there. But i dont have ne plans until the spring so im not delayed. the only thing that may be delayed would be my sprinkler valve, if the distributor agrees to the price.

Your cannon is great though. I hope to make an advanced combustion soon for myself.
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Unread postAuthor: Killjoy » Mon Dec 17, 2007 2:27 am

Wow thats really nice octane god job.
Thats pretty clever how you covered the ignition wires up by using 1/2" pvc, took me a little while to figure out what it was, It blended so well.
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Unread postAuthor: octane89 » Mon Dec 17, 2007 11:10 am

Its actually just irrigation pipe from Rain Bird, it was .50 cents.
I have new pictures with the valve and painted barrel-can't upload though cause photobucket is not letting me for some reason.
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Unread postAuthor: octane89 » Mon Dec 17, 2007 10:56 pm

New photos guys. And I added some recharable batteries to the fan, makes a difference. Especially in my pocket.
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Unread postAuthor: Ragnarok » Tue Dec 18, 2007 8:22 am

Doesn't surprise me. Usually rechargeable batteries have lower internal resistance, which more than compensates for the slightly lower voltage, so you'll get more power from the fan.

Excellent cannon. One question - why is the igniter backwards?
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Unread postAuthor: octane89 » Tue Dec 18, 2007 8:31 am

I actually like it that way. I shoot from the hip so I dont mind it at all. Plus a new ignition source is in line so it won't be there for too long.
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Unread postAuthor: ralphd » Sat Dec 22, 2007 9:35 pm

I was under the impression that MAPP Gas has acetlyene in it. Doesn't aetlyene react with copper or is that only true with pure gas? Anyway, nice gun. This is the style I'm considering for my next. Is this a breech load? How are the barrel and cylinder holder secured to each other?
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Unread postAuthor: octane89 » Sun Dec 23, 2007 2:04 am

The barrel is connected using a male adapter that connects to the female end on the cannon. The cylinder is held using a large pipe/hose clamp.
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Unread postAuthor: Novacastrian » Sun Dec 23, 2007 2:16 am

ralphd wrote:I was under the impression that MAPP Gas has acetlyene in it. Doesn't aetlyene react with copper or is that only true with pure gas? Anyway, nice gun. This is the style I'm considering for my next. Is this a breech load? How are the barrel and cylinder holder secured to each other?


No, it has methylacetylene-propadiene in it.
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Unread postAuthor: Ragnarok » Sun Dec 23, 2007 10:47 am

ralphd wrote:I was under the impression that MAPP Gas has acetlyene in it. Doesn't aetlyene react with copper or is that only true with pure gas?

In order: No, MAPP doesn't contain acetylene, but you are right, acetylene doesn't go well with copper, or alloys above about 65% copper.
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Unread postAuthor: Panzerfaust » Fri Mar 28, 2008 2:39 pm

Not to rain on the parade, its a great looking gun, but arent those 90-degree elbows DWV? And the cleanout... I have a feeling that DWV + MAPP gas = bad.


(memory is telling that MAP gas is more flamable than propane)
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Unread postAuthor: LikimysCrotchus5 » Fri Mar 28, 2008 2:49 pm

Panzerfaust wrote:Not to rain on the parade, its a great looking gun, but arent those 90-degree elbows DWV? And the cleanout... I have a feeling that DWV + MAPP gas = bad.


(memory is telling that MAP gas is more flammable than propane)


Yes your a right that MAPP gas is more flammable but some people use dww fittings, some dont, it just depends of what you think is safe, dwv has worked under the same conditions that pressure rated parts have in a combustion and both have withstood the pressure. I for one have used dwv on a advanced propane combustion cannon and it has worked fine for me.

Also octane is not active in this forum, he has dedicated his time back to paintballing, IIRC.
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4SPC, My 4" piston 3" porting cannon
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Fix up copper cannon
Fix up 4SPC
Start Stirrup pump
Start Toolies piston bazooka
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Unread postAuthor: Panzerfaust » Fri Mar 28, 2008 2:54 pm

Oh jeese im sorry i got to this gun with the little "random cannon" thing and did not realise how old it was. Sorry about that.

Do hope this guy isnt no longer active because his gun blew up...
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