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

Unread postAuthor: octane89 » Sat Dec 15, 2007 3:26 pm

First advanced combustion, so far its worked well. I call it Demetrios, I don't really know why but it sounded sweet. Video and vent (on cannon) will be added later.

SPECS:
Chamber: 3" ID x 16"
Barrel: 2" ID x 46"
Ratio: Between .8:1 and .9:1 (Including the elbows)
**Mapp Gas powered***
Ignitor: BBQ Ignition
Fan: Camping Fan from Walmart, MODIFIED for a external switch.

Meter Info: I used some copper fittings I had, along with pressure rated gas valves we had in stock at work. They are cleaner looking, and about the same price.

About the fan: What I did with it was this. Inside (on the balck cap) there is a copper strip that connects the circuit. I simply cut it in half, glued into place, sodered the switchs' wires to it and ran them through were I needed.
FAN VIDEO: And note, I used epoxy to hold it in place.
Image

*Now for the money shots...

Image
Image
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Image
Image
Image
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Last edited by octane89 on Mon Dec 17, 2007 12:39 pm, edited 7 times in total.
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Unread postAuthor: Novacastrian » Sat Dec 15, 2007 3:34 pm

Very nice construction Octane, i like the way you have made it compact.
Now just to stir you up "Money Shots" should consist of pieces of debris after you have blown something up, or shot it full of holes!
Are you planning on a paintjob? I think a nice urban camo in grey would look cool. What pressure do you use in you fuel meter?
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Unread postAuthor: BigJon » Sat Dec 15, 2007 3:34 pm

Very nice cannon! I like the thing thats holding the mapp gas it looks very cool. I think you should paint the barrel though, the primer stain makes it look kind of slopy.
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Unread postAuthor: bigbob12345 » Sat Dec 15, 2007 3:37 pm

This is a very well made cannon but as BigJon said you really need to paint the barrel
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Unread postAuthor: octane89 » Sat Dec 15, 2007 3:38 pm

I will have a better paint job soon. Im an art student so I kind of expect it. I use around 90psi, right now it only reaches 75spi but the tank was outside...and Im in the US (michigan to be more specific) and winter is harsh.

The barrel will be painted soon, and the stain...well yea I put on a little too much primer. And thanks for the complement on the tank holder, just something different.
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Unread postAuthor: c19o » Sat Dec 15, 2007 3:52 pm

Very Nice! I like your MAPP gas container, blends into the launcher very well.
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Unread postAuthor: Mr. Beaver » Sat Dec 15, 2007 4:54 pm

:lol: That is freakin' sweet
me likE :)
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Unread postAuthor: JDP12 » Sat Dec 15, 2007 5:09 pm

very cleanly built, can't wait to see it with the barrel painted.

Nice canister holder too, it almost looks like a flash suppressor/muzzle brake
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Unread postAuthor: Hubb » Sat Dec 15, 2007 5:18 pm

"Two thumbs up"

Good job.
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Unread postAuthor: potatoflinger » Sat Dec 15, 2007 7:22 pm

That's one amazing looking gun! I also like the mapp gas cannister holder, great job!
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Unread postAuthor: octane89 » Sat Dec 15, 2007 8:23 pm

ilovetoblowthingsup wrote:Nice canister holder too, it almost looks like a flash suppressor/muzzle brake

Thats actually what it was suppose to resemble.

New picture is up-barrel to be painted tomorrow.
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Unread postAuthor: experament-u2 » Sat Dec 15, 2007 11:24 pm

looks heaps nice chap good work on the mapp holder
oh and i will be looking forwards to the paintjob
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Unread postAuthor: mark.f » Sun Dec 16, 2007 8:11 am

Nice, but that BBQ igniter looks a little uncomfortable. Why'd you mount it backwards?
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Unread postAuthor: octane89 » Sun Dec 16, 2007 11:39 am

Its actually not bad at all. I like to shoot from the hip so it works out well. A future upgrade will be a ignition, so Im not to conceerned about it anyways.
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Unread postAuthor: Maniac » Sun Dec 16, 2007 1:20 pm

Really nice cannon man i would like to see a pic of the walmart fan.
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