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PCP WIP

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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PCP WIP

Unread postAuthor: Lockednloaded » Tue Aug 16, 2011 6:16 pm

I've been working a lot with paintball caliber guns and HPA, so I decided to put them together to get a really compact, high-powered, and most importantly multi-shot gun. Obviously its not done, but it is fairly powerful just manually opening the valve by hitting it with a wrench

Image

As you can tell the hammer is not on the gun, I just can't build one correctly, so any tips would be very helpful
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Unread postAuthor: Zeus » Tue Aug 16, 2011 6:26 pm

I'd recommend browsing forums that discuss firearm construction, the mechanism will be the same, Home Gunsmith Forums and Weaponeer are a good starting point.

What sort of hammer are you looking for, single or double action, an open bolt type, etc. I have a decent collection of related material so PM me if you'd like something specific.

Also, good build, I look forward to seeing it's completion.
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Unread postAuthor: clemsonguy1125 » Tue Aug 16, 2011 7:20 pm

Looking good, any chance of seeing the valve stem.
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Unread postAuthor: Lockednloaded » Tue Aug 16, 2011 8:04 pm

Thanks zeus, I really don't care which type of hammer I use, I just need it to be simple and functional.

Clemsonguy, it's just a push-button valve from mcmaster
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Unread postAuthor: Gun Freak » Tue Aug 16, 2011 8:11 pm

You have a lot of faith in those brass fittings, some peoe say they aren't very good. this looks nice... Looking forward to end result.
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Unread postAuthor: Lockednloaded » Tue Aug 16, 2011 8:19 pm

Gun Freak wrote:You have a lot of faith in those brass fittings, some people say they aren't very good. this looks nice... Looking forward to end result.


"some people" haven't personally tested them to 3000psi. Since I'm taking this to 1500psi max, I feel fairly safe and within my limits. Thanks for the concern, and let's just hope I don't stretch it out like my hybrid project :D
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Re: PCP WIP

Unread postAuthor: Gippeto » Tue Aug 16, 2011 11:51 pm

Lockednloaded wrote:As you can tell the hammer is not on the gun, I just can't build one correctly, so any tips would be very helpful


What have you tried up till now? Pics might be of value.

In-line striker located in a tube is going to be the easiest IMO.

This gives you a place to house the striker spring, and a place to mount the sear and trigger assemblies.

Not insurmountable. :)
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Re: PCP WIP

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Unread postAuthor: Zeus » Wed Aug 17, 2011 5:32 am

As Fuzzbean over at Homegunsmith has proven, you don't really need a sear, if you can live with a heavier trigger pull, as is shown here.

And here's something just for interest
Edit: Slight typographical error.
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Unread postAuthor: Lockednloaded » Wed Aug 17, 2011 12:39 pm

Image

It's a pretty bad video, and I was hitting the valve open manually with an actual hammer :lol: All four shots go through the styrofoam, I just didn't get it in the frame
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Unread postAuthor: Gun Freak » Wed Aug 17, 2011 2:49 pm

How much pressure was left after 4 shots?
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Unread postAuthor: Lockednloaded » Wed Aug 17, 2011 2:54 pm

EDIT double post :oops:
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Last edited by Lockednloaded on Wed Aug 17, 2011 3:06 pm, edited 1 time in total.
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Unread postAuthor: Lockednloaded » Wed Aug 17, 2011 2:55 pm

I zoom in on the gauge near the end of the video, it's reading about 800-900psi And that's with my inconsistent, manual way of firing (hitting the button with a hammer)
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Unread postAuthor: Gun Freak » Wed Aug 17, 2011 3:17 pm

Sorry I skipped that I guess, well that is pretty good, with a proper hammer this will be pretty nice.
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