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Basic single shot bb gun???

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Basic single shot bb gun???

Unread postAuthor: Hannoc » Sun May 25, 2008 2:19 am

G'day everyone,

I am new to this forum and airsoft/bb guns. I had a chance to play with an airsoft pistol last year when I was on holidays in the U.S. but I didn't bring it back to Aus for fear of getting caught.

The main reason I wan to make a BB gun is for my interest in High Speed photography. (check out my Flickr page for some of my photos http://www.flickr.com/photos/8012268@N07/ ) At the moment I have pop water bombs with a glove gun and bbs but I want something that has the power to put hots thru cans, smash glass bottle, light globes and maybe even go thru wood etc. You know more carnage :twisted: to catch on film.

So I have come up with 2 very basic designs to shot 6mm BBs see pic.

Image

Do either of these stand a chance of inflicting any damage? Please let me know what you think, any info would be great. If I am headed in the wrong direction please feel free to point the way.
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Unread postAuthor: XxtriviumxX » Sun May 25, 2008 2:32 am

The bottom cannon will work... and will inflict reasonable carnage... :D

Though it would be referred to as an "inline" and would be better suited in the pneumatics discussions. :wink:

I would go for the bottom design, the blowgun would be more useful with a solenoid valve or piston cannon.

EDIT: Oh and dont forget to consider the C:B (chamber : barrel) ratio... What you want is a C:B ratio of 0.8:1, but 1:1 should be fine... The chamber volume on your design is a bit overkill. :)
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Last edited by XxtriviumxX on Sun May 25, 2008 2:37 am, edited 1 time in total.
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Unread postAuthor: Carlman » Sun May 25, 2008 2:33 am

hey mate im also in aussie land!

i made a single shot 1/8" (2.5mm) bb gun with a blowgun and tentpole barrel and had some great fun.

heres a link: http://www.spudfiles.com/forums/1-8-bb-bg-t12270.html

i have now moved on to a 300psi 6mm qev gun of which i will post a picture later. this can shoot plastic beads, lead split shot and metal bbs through cans, plywood and alot of other stuff.

what you have designed there will work but i suggest putting a 25mm ballvalve before the blowgun so you can have multi shot, like open and close BV then fire.

Ill update this post later with a photo of my newest bb gun.

Another sugestion i have is build a cloud or vortex BBMG and capture that in slow motion, that would be awsome :D
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Unread postAuthor: ghostman01 » Sun May 25, 2008 3:03 am

XxtriviumxX, this is a bb gun design so no it should stay here because as much as it is an inline its bb caliber. Hannoc, those airsoft guns are great fun arent they, i to had the opportunity to play with them as well when i went to the US, what i would suggest doing is making a high pressure bb gun using a piston valve made outta small air fittings and gas fittings ( watch out for different threads) and use the same breech idea as carlman did. you should by rights get decent power.
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Unread postAuthor: Carlman » Sun May 25, 2008 3:23 am

heres pics of my above mentioned bb gun:
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Attachments
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here it is, 1/4" SMC Pnuematics QEV as a valve
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Unread postAuthor: ghostman01 » Sun May 25, 2008 3:56 am

wow that looks umm decent !! very nice
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Unread postAuthor: Hannoc » Sun May 25, 2008 4:01 am

Thank for the input guys,
Carlmans breech idea is cool, as for the QEV gun it looks cool but I have no idea how that work :) .

ajdevi92, Have been searching for info on piston valves, but there is so much info I am a bit confused, do you know a good to start so I can get an understanding of how they work?

While I am at work tomorrow I will be on the look out for anything in the workshop that my be useful:wink:,we have heaps of air and gas fittings in the store.
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Unread postAuthor: ghostman01 » Sun May 25, 2008 4:07 am

umm im sure if you search piston valves and look through the pneumatic discussions theres a few explainatorys in there, i would start by getting a T fitting.
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Unread postAuthor: XxtriviumxX » Sun May 25, 2008 4:17 am

@Hannoc

Take a look at the spudwiki... it should explain things for you. :wink:
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Unread postAuthor: MrCrowley » Sun May 25, 2008 4:20 am

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Unread postAuthor: Antonio » Sun May 25, 2008 4:29 am

nice slowmotion pics you got there:)
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Unread postAuthor: Hannoc » Sun May 25, 2008 4:45 am

Sorry ajdevi92 I didnt me to be a pain, I did do a search for piston valves and I got like 13000 hits, after going thru a few I just got confused by some of the diagrams and explenations :?

Thanks XxtriviumxX and MrCrowley, I now have alot of good info to work with.

Thanks ant glad you liked them.
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