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Kartoffele KannoneV3.0- Update: New rifled barrel w. dmg pic

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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Kartoffele KannoneV3.0- Update: New rifled barrel w. dmg pic

Unread postAuthor: SnowFlox » Thu Aug 02, 2007 10:53 am

Well im back from vacation, got bored so i wanted to shoot some patato's with my older cannon.

But it diddnt work :evil: no sparks..

I diddnt want to figure out whats wrong. so i got to the local hardware shop to buy parts for a bigger on.

Its not a beautiful one, but it shoots patato's ;)


Sorry for the blurry picture but you get the idea how long it is.

Image

Little MSI NorthBridge cooler( to small need biger one ) placed on two screws.
And wired the the screws for the power.

Image

Image


Tested it today and it fires nice :) but the older one works again.. dont know how.. but now i have 3 working ones :P

the whole family ! Dad mom and a child

Image
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Last edited by SnowFlox on Tue Aug 07, 2007 2:52 pm, edited 2 times in total.
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Unread postAuthor: spud yeti » Thu Aug 02, 2007 11:00 am

Very nice! I love the whole happy family vibes 8)
They all look really cool, but holy wack thats one long barrel!
BTW, how was your vacation?
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Unread postAuthor: SnowFlox » Thu Aug 02, 2007 11:21 am

Barrel is indeed very long, but a shorter one from my older one isnt more powerfull :)

Had a great vacation :wink:
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Unread postAuthor: spud yeti » Thu Aug 02, 2007 11:50 am

Thats good to hear. So when is it pneumatic time? :wink:
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Unread postAuthor: SnowFlox » Thu Aug 02, 2007 11:55 am

lol ! i was just thinking about it to build a pneumatic one.

you could have been my brother.. not only the same thoughts but like jimi hendrix as well :lol:

simple one with bibycle pump. instead of 19mm barrel i use on my 2 bigger combustions, use 16mm barrel (that i use on the smallest )

why 16mm ? those little yellow hearing protection things fits perfect in 16mm barrel. :D
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Unread postAuthor: spud yeti » Thu Aug 02, 2007 11:59 am

Hahaha, we are long-lost brothers!
I really like the sound of that pneumatic, what valve were you thinking of?
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Unread postAuthor: SnowFlox » Thu Aug 02, 2007 12:02 pm

just thinking of a simpel ball valve first. :)
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Unread postAuthor: spud yeti » Thu Aug 02, 2007 12:05 pm

Hmmm, yeah, they nice to start off with, but not the greatest in performance. I think you have the skill to build a piston/diaphram valve gun that works really well. Look under "Pneumatic cannon discussion" and in the sticky theres a thread "Piston valves explained visualy" by Clide. Look at that to understand piston valves.
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Unread postAuthor: SnowFlox » Thu Aug 02, 2007 12:07 pm

Well i know how a screwdriver works ;)
Thanks ! i will have a look at it by tomorrow ! :)
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Unread postAuthor: spud yeti » Thu Aug 02, 2007 12:27 pm

Haha, you'd be suprised! Some people dont have the logic, common sense, skills or any other ounce of mechanical knowledge in them to build one!
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Unread postAuthor: dauphinoise potato » Fri Aug 03, 2007 12:14 pm

AAah nice family of improvised starch produce accelerators :lol: Is the ratio ok for the one you just built?
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Unread postAuthor: SnowFlox » Fri Aug 03, 2007 4:01 pm

Yeah its fine :) as i said, when i try a shorter one.. it decreased performance.

this long barrel was even longer ! but i cut a piece off, and this size is just perfect :)
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Unread postAuthor: SnowFlox » Tue Aug 07, 2007 9:57 am

Because of the bigger combustion chamber this time, i bought a other barrel.

This one is about 80cm long and has an inside diameter of 26mm. so that 10mm more then his first barrel.

when i got the barrel ready, i did a test shot to an big plastic bucket.
WOW what a force !! :shock: much more then the smaller 16mm barrel !

I dont know how far the patato will go with this bigger barrel, but the damage is very big ! I shot it once.. it scares me the crap out of me :D

The two barrels

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The damage shots of both barrels

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edit...

and now... my barrel is rifled to :D

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Unread postAuthor: VH_man » Sun Jan 06, 2008 8:41 am

how did you rifle your barrel? if i may ask.....
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Unread postAuthor: Carlman » Sun Jan 06, 2008 10:28 am

probobly the ye old nails and dowel method??, thats what im doin 2 some poly pipe soon for my pneumatic. Nice family by the way!
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