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Rattlesnake - constant flow full auto valve

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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Rattlesnake - constant flow full auto valve

Unread postAuthor: jackssmirkingrevenge » Thu Apr 02, 2009 12:25 pm

Update: this valve can be seen in action here, win!

I present version 2.0 of my original pop-off auto valve, very happy with the result so far, take a look why :D

[youtube]http://www.youtube.com/watch?v=K-MyRyXzgY8[/youtube]

psycix eat your heart out :P :D

It doesn't really come across in the video but the sound is a lot sharper than version 1, I'm guessing that since the piston isn't airtight there isn't as much friction and it opens significantly faster. Here's the internals:

Image

Note that the varying rate of fire is because I'm applying different pressure to the blowgun it's attached to.

Methinks I have some single shot testing to do, I'll keep you posted :)
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Last edited by jackssmirkingrevenge on Thu Apr 09, 2009 12:52 am, edited 1 time in total.
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Unread postAuthor: sniper hero » Thu Apr 02, 2009 12:28 pm

wow looks good!
yes it's easy to hear the zound is far sharper than in the first vid
I would love to see a gun with this one :D
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Unread postAuthor: ALIHISGREAT » Thu Apr 02, 2009 12:33 pm

Braaaaaaaaap!

now all you have to do is make it shoot something!
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Unread postAuthor: jackssmirkingrevenge » Thu Apr 02, 2009 12:41 pm

I hooked it up to my pump, it was only popping at 60 psi, so added another spacer to the spring and it's popping at 80, even louder :D bit of a small leak though, so testing postponed for now, but yay! win! :D
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Unread postAuthor: Carlman » Thu Apr 02, 2009 12:42 pm

bloody took ya time getting one that works :roll:

lol nice work mate!
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Unread postAuthor: jackssmirkingrevenge » Thu Apr 02, 2009 1:01 pm

Carlman wrote:bloody took ya time getting one that works :roll:


Hey, the original worked nicely, before it broke and I couldn't fix it 'cause it was sealed up and all. No such problems now ;) small chambered wanker :D
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Unread postAuthor: psycix » Thu Apr 02, 2009 3:53 pm

epoxyman wrote:psycix eat your heart out :P :D

I'd love to. But your fullauto gun doesn't fire through a 16mm porting does it? :D
And on top of that, this was my FIRST try at fullauto... :roll: I have to agree to carl, it did take you a lot of time...
Maybe you should also take a bite out of your own eh? :P


Besides that, I'd like to say the following, without sarcasm (seriously):
Its nice! I like it a lot!
What are your next plans? Ammo loading mechanism or perfecting this?


JSR wrote:small chambered wanker
Ohhhh that one's a hit! :lol:
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Unread postAuthor: Brian the brain » Thu Apr 02, 2009 4:29 pm

Wow..Nice rattlesnake!

that seems to work..just fine.

You have ended your search in succes!!!!!!


Finally!!
Does the exhaust hurt like the Snapvalve?
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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 » Thu Apr 02, 2009 5:11 pm

psycix wrote:
epoxyman wrote:psycix eat your heart out :P :D

I'd love to. But your fullauto gun doesn't fire through a 16mm porting does it? :D


showoff :P :D

And on top of that, this was my FIRST try at fullauto... :roll: I have to agree to carl, it did take you a lot of time...
Maybe you should also take a bite out of your own eh? :P


Ah, but you just bought parts and clobbered them together, any fool could do that. I made mine out of toothpicks and chewing gum :D

Its nice! I like it a lot!


Thanks, honestly :)

What are your next plans? Ammo loading mechanism or perfecting this?


Hook it up to my pump for single shots with anything from 3mm to 6mm barrels, see what performs best and then move on to a reloading mechanism to be used with it.

Wow..Nice rattlesnake!


I think this project just got a new name, nice one :D

Does the exhaust hurt like the Snapvalve?


Like feck! It promises well :)
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Unread postAuthor: mega_swordman » Fri Apr 03, 2009 1:48 am

Was the pneumatic spring changed to simply a mechanical spring, or is there some weird hybrid mix going on in there? I just want to clarify.
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Unread postAuthor: jackssmirkingrevenge » Fri Apr 03, 2009 3:26 am

There is a limited pneumatic buffering because the tube where the piston travels is sealed, but it's not airtight so it's mostly the coil spring that does the work.
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Unread postAuthor: SPG » Fri Apr 03, 2009 5:14 am

Jack, I've an idea for a blowback bolt for a pellet gun, as i know you're always aiming to use pellets. Hope it makes sense. I've left the spring out behind the bolt but otherwise it's all there.

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Unread postAuthor: jackssmirkingrevenge » Fri Apr 03, 2009 6:06 am

I had been considering a similar system for the first version, I'll see what calibre suits this one most in a few hours and move from there.
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Unread postAuthor: sniper hero » Fri Apr 03, 2009 11:17 am

SPG
I will make that system as bolt action
but wont the pellets fall first halfway till the pin? causing jamming?
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Unread postAuthor: sputnick » Fri Apr 03, 2009 12:49 pm

@Sniper Hero,

Yes, that is a possibility, but just because it hits the pin does not mean gravity stops working, and that they wont fall in the absence of the pin :D
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