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3D, Doomestic Desert Destroyer. :P

Built a BB Machine Gun? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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3D, Doomestic Desert Destroyer. :P

Unread postAuthor: ondskehem » Sun May 27, 2007 1:11 pm

edit: closed thread.
Moderator please delete this.
sorry for the inconvenience.
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Last edited by ondskehem on Sat Jan 19, 2008 6:56 pm, edited 7 times in total.

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Unread postAuthor: hi » Sun May 27, 2007 1:24 pm

wow thats very well built. what kind of valve does it have? all i see is a blow gun, but is that the accuation or something?
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Unread postAuthor: origin unknown » Sun May 27, 2007 1:32 pm

How does your bolt action thing work? Can you draw a diagram of how it works? It looks weird but really cool. I might use the same system in one of my cannons.
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Unread postAuthor: CS » Sun May 27, 2007 1:36 pm

Ah! I get it, opposite from the typical configuration. Just to avoid future confusion, the larger chamber on top (when held in firing position) is the chamber. The blow gun then is the valve to the BB barrel. Suppose I would have been led to that conclusion earlier had I read the topic title.

Welds on the structural bit of the launcher are looking good, although it appears the weld bead may have got a bit wavy on the chamber ends. I don't know if your particular design allows for it, but I would have had the chamber as the top rail, in place of the square tubing rail. I think having both contributes to too much vertical height. Also how this whole loading mechanism bit working? Anyway, nice metalworking, hope to see some future work along the same lines as you seem near finished on this launcher. Again nice work, and cannon.
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Unread postAuthor: ondskehem » Sun May 27, 2007 1:58 pm

yes thats correct pimpmann22.

The big one is the pressure chamber. I had som serious probles getting that one real tight. it leaked all the time, but after som (rather ugly, I know) welding it holds my "ammo" right in place :).

I made a quick sketch of the bolt action mekanism.

explenation;

the green pipe is the air inlet.
the blue-ish is the barrel (air + bullet outlet)
the blue staf is the bolt-action-lever. When i pull it backwards it fetches a bullet from the magasine, and when i push it forward again, it drops it into the barrel.
red pipe is magasine.
grey is solid alu.

it works, but not perfectly (yet!).

and thank's for the nice comment this far
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Unread postAuthor: TwitchTheAussie » Sun May 27, 2007 7:14 pm

I congradulate you sir. Are there any more improvements coming?
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Unread postAuthor: potatoflinger » Mon May 28, 2007 2:39 pm

Awesome looking gun.
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Unread postAuthor: Hotwired » Mon May 28, 2007 3:58 pm

Does the flow restriction in the blowgun slow down the chamber being vented enough to get multiple shots then?
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Unread postAuthor: veginator » Mon May 28, 2007 4:09 pm

thats a pressure washer he used for the valve and the barrel. also how much pressure are you putting in :?:
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Unread postAuthor: ondskehem » Tue May 29, 2007 9:18 am

I pump in 8 Bars, that equals about 110 Psi.

"Does the flow restriction in the blowgun slow down the chamber being vented enough to get multiple shots then? "

well yes, there is a problem with my thin pipes and the blow guns internal flow resistans, but the gun i built for shooting a bullet at the time so at least it fills its purpose well.

Firing multiple bullets a the "same time" would drop the pressure far to quick, so I just shot them one by one.
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Unread postAuthor: wannabie » Tue Jun 05, 2007 4:11 am

Have you fired it yet? can we get some damage pic's? i love that thing nice bolt idea
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Unread postAuthor: jackssmirkingrevenge » Tue Jun 05, 2007 4:26 am

bit of an odd colour scheme for Sweden, I would have expected something like this :)

Image

Still, nice work :D
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Unread postAuthor: iknowmy3tables » Tue Jun 05, 2007 5:44 am

very nice, I like this gun, i guess 6-10 shots depends on how long you pull the trigger, its also a looks a bit heavy
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Unread postAuthor: ondskehem » Wed Jun 06, 2007 9:53 am

yes, perhaps a bit strange choice of colors but i think it looks nice :D.

And yes, it's heavy. But not to heavy to carry around.

Damage pictures might come later on, but right now i graduating from my school, so it will take a while before I have time to play with it.
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Unread postAuthor: iknowmy3tables » Thu Jun 07, 2007 2:48 am

ever consider getting a regulator? it would make the tank last longer
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