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1/8" BB-BG

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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1/8" BB-BG

Unread postAuthor: Carlman » Wed Dec 19, 2007 9:27 am

This is my latest whip together. You may recall reading my other thread about my find of tent poles fitting 3mm BBs perfectly, this branched from that. It is basically a 1-3 shot breech loading blowgun. Below is a picture of it as well as a paint drawing of it.

Image

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To load i simply put a bb in the hole and cover the hole with my thumb when i fire, im tryin to find an airtight cover for the hole. The 'O-Ring' is to hold back the bb for a couplle of milliseconds if that to improve power and to stop it from rolling out the barrel when aimed down. The breach loading is from the hole in the safety valve from a compressor, i just drilled through into the barrel. A piece of a paper clip stops the bb rolling backward. The back of the barrel has been 'dug' out with the tip of a spade bit like a funel to hold up to 4 bbs and to increase the force of air going into the barrel.

Damage pics will be up soon, its too late to turn compressor on now and i have to get more ammo (i'm in oz so i have 2 get bbs from bike pedals lol)

Comments are welcomed and encouraged.

EDIT: BBs ARE NOT 3MM THEY ARE 1/8" sorry

EDIT: Here are some damage pics and videos i have taken today.

I taped things to a large milo tin and shot at it so i could then collect the BBs afterwards. The first second and third images are of the milo tin after a couple of cds and some printed targets were destroyed.

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Image

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The next image is a gif animation of how i breach load it

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My ammo stockpile:

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Size comparrison and pic showing grouping of bbs in ply from 10m

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Not the best video but its okish, against a cd at 60psi

[youtube]http://www.youtube.com/watch?v=6g-bEa4z-tc[/youtube]

and here is a pic of the cd afterwards

Image
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Last edited by Carlman on Fri Dec 21, 2007 10:31 am, edited 3 times in total.
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Unread postAuthor: Maniac » Wed Dec 19, 2007 1:09 pm

nice and simple i like it i think you should add a small tank to it though. Also are you getting good flow with that little blowgun.
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People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
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Unread postAuthor: Carlman » Wed Dec 19, 2007 1:48 pm

glad you like it, it was actually JSR's idea to go with the blowgun although i might upgrade to a pressure washer handle. I can embed BBs twice their diameter into 10mm plywood! I am planning to have a metal tank welded up for me if i cannot find one that would be able to go in a backpack, that will store my pressure.

Either that or some 25mm galvinised steel pipe and fittings.
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Unread postAuthor: Maniac » Wed Dec 19, 2007 2:00 pm

yea i would go with a pressure washer handle those work a lot better also are you getting leakage from where the o ring is. because it looks like in the pic you cut a slit in the pipe and wrapped the ballon a round it.
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Coodude26 wrote:
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Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
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Unread postAuthor: Carlman » Wed Dec 19, 2007 2:02 pm

i cut a slit the width of a hack saw blade so the baloon neck (the thing that looks like an O ring) fitted in, it off a water bomb. No leakage with a bit of tape. what you think about tank?
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Unread postAuthor: Carlman » Fri Dec 21, 2007 7:44 am

UPDATED WITH PICS
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Unread postAuthor: SleekZ » Fri Dec 21, 2007 8:45 am

so those bb's are smaller then those yellow plastic airsoft ones? I wouldn't mind basing my new gun off them- way more effective I'm guessing?
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Unread postAuthor: Carlman » Fri Dec 21, 2007 8:55 am

i wouldnt know about the airsoft ones as i am in australia, they are suprisingly good. With a gun as simple as mine they can shatter cds, imbed into ply and fly straight (all at 80-120 psi)

With regards to video, does anyone know a good free converter for .mov files? Ive just wasted 40mb of my quota tring to find 1
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Unread postAuthor: Maniac » Fri Dec 21, 2007 9:58 am

i say adda high pressure tank i like to have portability with mine. those damage pics are amazing for a gun of that size.
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Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
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Unread postAuthor: Carlman » Fri Dec 21, 2007 10:13 am

its in in the O ring... worx like a charm

and im thinking of getting a small slave tank to take to 200psi reged doen to 100psi in a backpack
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Unread postAuthor: bluerussetboy » Fri Dec 21, 2007 10:31 am

for your video needs

online converter: http://online.movavi.com/

or

download SUPER for Windows

http://www.erightsoft.com/SUPER.html

direct download
http://www.computerbild.it/cd/software/ ... Rsetup.exe
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Unread postAuthor: Carlman » Fri Dec 21, 2007 11:26 am

how the hell do u use SUPER?
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Unread postAuthor: bluerussetboy » Fri Dec 21, 2007 11:44 am

select your output settings then drag and drop your input video files and then hit encode.

for much more information on video conversion checkout: Doom9

http://forum.doom9.org/index.php
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Unread postAuthor: Carlman » Fri Dec 21, 2007 11:52 am

ok i need to change it to .avi but it aint workin 4 me
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