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"SMG" Combustion

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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"SMG" Combustion

Unread postAuthor: blind909 » Wed Jul 30, 2008 8:14 pm

Ok, here is my first actual combustion(pillbottle minis dont count). The chamber is 2 inch aluminum(8 inches long), and the barrel is 1 inch pvc(8 inches long). The sparker is from a longnose lighter(larger than any other igniter ive seen). The sparker is housed inside a 1 inch pvc grip. That is pretty much it, Very simple. I MIGHT be making some upgrades.

[img][img]http://img34.picoodle.com/img/img34/4/7/30/f_COMBUSTION0m_8495c25.jpg[/img][/img]
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Unread postAuthor: jonnyboy » Wed Jul 30, 2008 8:20 pm

DAMAGE PIC'S

Nice chamber how did you attach it to the pvc it kind of looks like its been taped on...

What kind of upgrades?
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Unread postAuthor: blind909 » Wed Jul 30, 2008 8:26 pm

Attached be some sort of clear epoxy i found in my garage It slides over the threads, and then was glued. And upgrades as in a ball valve for fuel(right now I spray axe with a straw down the barrel) And A Daisy 4x15 scope. And I may also add another igniter right below the first one, so I can have a double trigger, and it will combust quicker, i think
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Unread postAuthor: FishBoy » Wed Jul 30, 2008 9:45 pm

nice build, firing vid plz

edit- spelling
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Unread postAuthor: blind909 » Wed Jul 30, 2008 9:56 pm

A firing vid might be a while, same with damage pics.
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Unread postAuthor: starman » Wed Jul 30, 2008 11:13 pm

What are you using for fuel and how are you fueling this thing?

I think the only thing I would've done this is try to get the spark gap out more in the middle of the chamber.

I assume you're shooting taters. Not a bad little gun actually. Nice effort.

Edit: OK I just read where you spray the fuel through a straw.
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Unread postAuthor: blind909 » Thu Jul 31, 2008 11:28 am

yup, potatoes, big marbles, airsoft buckshot, and bouncy balls.
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Last edited by blind909 on Fri Aug 01, 2008 10:25 pm, edited 1 time in total.
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Unread postAuthor: Coodude26 » Thu Jul 31, 2008 1:41 pm

blind909 wrote:yup, potatoes, big marbles, airsoft buckshot, and bouncy balls.

Now my b!tch of a mom says I cant shoot this thing because she says it might cause a Fu*king fire. She can be one hell of a b!tch.


She's only worried for you dude, not like its a bad thing, shes your mother :P

You might want to move up to a bigger cannon altogether instead of just upgrading, a propane setup for this cannon would be very cumbersome.
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Unread postAuthor: blind909 » Thu Jul 31, 2008 3:14 pm

I guess so, And Im a pnuematic man, not a cumbustion anyway :wink:.
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