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CO2 inflator pistol prototype

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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Unread postAuthor: django » Thu Feb 04, 2010 7:43 am

jackssmirkingrevenge wrote:I had tried to make a small auto hammer valve using a schrader here, rate of fire was too high and it wouldn't be much good for 0.177" either.

it wont be semi auto with a hammer valve either


It will if you have a double action trigger. Can you get a revolver cap gun? If so you could conceivably cut it up and have it hammering on the inflator stem (the part under the trigger that I'm holding above), that will give you a burst of gas per trigger pull that would work great with a tee magazine. It would probably not be that pretty, but it would work ;)


Ive got an old 357 Blank gun( metal), might be able to use it?,I'll try get a pic up 8)
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Unread postAuthor: Mr.Sandman » Thu Feb 04, 2010 1:24 pm

Wow Jack, I must say you have stepped up your video quality. Gone are the days with posts with crappy sound and overall quality err um i mean nice gun.
Have you tried making a magazine similar to your blow forward? Although it would seem that you would have to find a way to make that work without blowing up your magazine.

On that note, what size co2 cartridges are those. they seem to be a bit larger in size than the standard 12 gram. Perhaps you could do further modification to the valve so that it would allow more flow.
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Unread postAuthor: jackssmirkingrevenge » Fri Feb 05, 2010 1:59 am

Mr.Sandman wrote:Wow Jack, I must say you have stepped up your video quality. Gone are the days with posts with crappy sound and overall quality


Have you not been following this thread? :D

Although it would seem that you would have to find a way to make that work without blowing up your magazine.


History does not promise well hehe

On that note, what size co2 cartridges are those. they seem to be a bit larger in size than the standard 12 gram.


It's a custom job ;)

django wrote:Ive got an old 357 Blank gun( metal), might be able to use it?,I'll try get a pic up 8)


Here's how it looks like in my head:
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Unread postAuthor: Davidvaini » Thu Feb 11, 2010 5:15 pm

might I suggest a magazine on the top somehow.. Like a removable one.
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Unread postAuthor: jackssmirkingrevenge » Fri Feb 12, 2010 12:41 pm

I made one with a tee magazine:

Image

Screwed up the seal though...
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Unread postAuthor: urgle the danish cow » Sat Feb 13, 2010 11:42 pm

thanks for trying my idea.
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Unread postAuthor: Davidvaini » Sun Feb 14, 2010 12:31 am

urgle the danish cow wrote:thanks for trying my idea.


do you have another acount on here?

I dont see you commenting anywhere else in this thread...

I am really intreeged in what your idea is.



Jack, did you get to fire it with the T magazine, love the BRAPPPP noise.
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Unread postAuthor: jackssmirkingrevenge » Sun Feb 14, 2010 2:24 pm

He had made a vague comment here.

did you get to fire it with the T magazine


I used the wrong kind of seal, too tight and it leaked :-/
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Unread postAuthor: Brian the brain » Mon Feb 15, 2010 2:09 pm

First whales..now seals..

You guys don;t hold anything sacred, do you...?!?!
Any progress on this?

How about converting it to a bbmg strapped to the forearm??
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: jackssmirkingrevenge » Mon Feb 15, 2010 4:31 pm

Nothing is sacred ;)

In the words of that miserable Scotsman,

Nothing matters. We're essentially all highly evolved monkeys clinging to a rock that's falling through space, and the rock itself is dying.


Anyway, back on topic:

Any progress on this?


I've shelved this idea, I have an HPA tank - why should I be fiddling with inflators, let the poor students figure it out :P :D

Yes, I just got a raise :D

I was thinking about something like the attached diagram, ball valve fed HPA strafer... with the ball valve handle replaced with a pinion gear, and a larger gear attached to the trigger, meaning that for a small movement of the trigger there will be a larger movement of the valve. It also means that the trigger will require a lot more force to open (plus the return spring it will need) but the gain in performance should be worthwhile. I have a couple of 1/4" and 1/8" ball valves that have remarkably low friction (in fact I'm saving one of the latter for the sentry gun) but I like the overkill use of a 1/2" valve, plus the ASA threads on the tank fit nicely in 1/2" BSP (as used in the HPA Rattlesnake)

How about converting it to a bbmg strapped to the forearm?


As part of the sentry gun project I hqave one of these on the way, so a compact "sleeve gun" with the tank hidden elsewhere is also a possibility :)
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Unread postAuthor: urgle the danish cow » Mon Feb 22, 2010 4:14 pm

Davidvaini wrote:
urgle the danish cow wrote:thanks for trying my idea.


do you have another acount on here?

I dont see you commenting anywhere else in this thread...

I am really intreeged in what your idea is.



Jack, did you get to fire it with the T magazine, love the BRAPPPP noise.


i suggested two ideas. one being the t magazine in the page where he asked for help and ideas. i never have the time to put my own creations on here and im not sure how. plus im still tinkering with the piston valve. kinda a newbie in pneumatics and such construction wise
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Unread postAuthor: _-J-O-R-D-A-N-_ » Mon May 31, 2010 9:38 am

This is very simmilar to something I posted on a site called http://www.rotteneggs.com

What I usually use is rubber tubing between the two tubes, taped up with sticky string tightened around the rubber.
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Unread postAuthor: spudtyrrant » Mon May 31, 2010 9:47 am

_-J-O-R-D-A-N-_ wrote:This is very simmilar to something I posted on a site called http://www.rotteneggs.com

What I usually use is rubber tubing between the two tubes, taped up with sticky string tightened around the rubber.
elaborate, what two tubes are you talking about, the only tube I can think of is the barrel. Woot first iPhone post
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Unread postAuthor: _-J-O-R-D-A-N-_ » Mon May 31, 2010 9:52 am

In the first diagram you can see a barrel, and a tube that holds the BBs.
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Unread postAuthor: spudtyrrant » Mon May 31, 2010 1:52 pm

_-J-O-R-D-A-N-_ wrote:In the first diagram you can see a barrel, and a tube that holds the BBs.
oh i thought you were referring to the diagram jsr posted above
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