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Topic: Homemade Semi-Auto Idea. Plausible Or No?

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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Unread postAuthor: Vudu » Tue Mar 24, 2009 8:12 pm

Hmm, well. AT least it's working for me now, hehe.
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Unread postAuthor: starman » Tue Mar 24, 2009 8:30 pm

In Vista, you can go to Control Panel, User Accounts, Turn User Account Control On or Off, then deselect the Use User Account Control box. This will more approximate the security model of XP and run everything as Administrator...but obviously make your computer a little more vulnerable. I disable it as a matter to rote on all my supported computers.

With HGDT, create a shortcut on your desktop that points to HGDT.EXE. Right Click on the shortcut, Properties, Compatibility Tab, and click the box Run this program in compatibilty mode for:, and choose Windows XP or older.
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Unread postAuthor: Vudu » Tue Mar 24, 2009 8:38 pm

Hmm, okay. Good idea. Now I just have to figure out how to work it all. THough I'm confused as to how I'm going to work my type of valve into this..
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Unread postAuthor: starman » Tue Mar 24, 2009 8:47 pm

Sorry, in your case, load and use GGDT instead.
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Unread postAuthor: Vudu » Tue Mar 24, 2009 8:59 pm

Hmm, okay. This confuses me to no end haha, the program is kinda difficult, but I guess I'll just keep at it.
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Unread postAuthor: Carlman » Wed Mar 25, 2009 12:13 am

There is an insruction manual type of thing on halls.
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Unread postAuthor: Vudu » Wed Mar 25, 2009 5:01 pm

My gun would be a burst disc type, correct?
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Unread postAuthor: Carlman » Wed Mar 25, 2009 5:46 pm

Vudu wrote:My gun would be a burst disc type, correct?


no but i dont know how you would enter that into ggdt though...
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Unread postAuthor: Vudu » Wed Mar 25, 2009 6:11 pm

Hmm, well then. Burst disc seems to apply more to my gun than any others, so I will use that. Also, due to my research regarding PVC, I think I may have to use metal fittings within the gun.

Quick question regarding GGDT, in the chamber data, would the chamber be referring to the air waiting to be shot out of the valve? Or is it reffering to the larger tank in the picture.
Which will probably be a paintball compressed air 50/4800, hooked up to a reg, considering PVC just won't cut it.
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Unread postAuthor: Carlman » Wed Mar 25, 2009 7:39 pm

no u cant use burst disk mate, yours doesnt have the flow or opening times to compare to a burst disk
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Unread postAuthor: Vudu » Wed Mar 25, 2009 7:48 pm

Blahh. Well, I'm lost then. Until I can figure out what's going on with this valve slection thingy, this project is on suspension.. :( Maybe Generic? I don't know what a barrel seal is though.
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Unread postAuthor: Carlman » Wed Mar 25, 2009 7:54 pm

a barrel sealer is a type of piston valve

and the chamber is the air waitng to be shot
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Unread postAuthor: Ragnarok » Wed Mar 25, 2009 7:56 pm

Vudu wrote:Maybe Generic? I don't know what a barrel seal is though.

You're clearly stuck as to what each variety of valve actually means.

If you can post some annotated diagrams of your valve, we'll be able to help you work out how to model it appropriately.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Vudu » Wed Mar 25, 2009 8:24 pm

Okay, will do. I will edit this post once it is done.

Edit>> Image

Pull on the trigger system to activate the firing pin, thus pulling the bolt assembly forward, releasing air into the barrel. Release trigger, spring pushes bolt back, replenishes air levels. Then you're ready for the next shot.
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 26, 2009 12:40 am

So the air that actually fires the shot is the small amount that's between the red disks? That's not going to give you much in terms of performance unless you're using high pressures ie several hundred psi, though it's a good way to be economical with air.
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