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BFG #7

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Re: BFG #7

Unread postAuthor: hectmarr » Mon Feb 05, 2018 7:46 pm

Hello farcti! This spectacular this! Very good aesthetics and as always, a neat construction. I like it! :D
With what pressure does this weapon fire? :?:
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Actually I'm planning the improvised, and improvising what's planned!
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Re: BFG #7

Unread postAuthor: farcticox1 » Mon Feb 05, 2018 8:12 pm

Only 140psi, it's just standard pneumatic parts and PVC chamber, that is enough, it will go through 1/2" plywood.
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Re: BFG #7

Unread postAuthor: hectmarr » Tue Feb 06, 2018 6:13 am

Surely, I mean, that's enough. Actually to do serious damage to other harder materials, the most effective, simple and elegant and least expensive, is to use the other type of weapon, of those that should not be discussed here for obvious reasons. Very nice that you made. Regards! :)
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Re: BFG #7

Unread postAuthor: 200BAR » Mon Feb 26, 2018 6:12 am

Nice build and great WIP pics.
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Re: BFG #7

Unread postAuthor: farcticox1 » Mon Feb 26, 2018 6:27 pm

I will be making another video as well when the weather warms up and I can get back out in the workshop again.
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Re: BFG #7

Unread postAuthor: mako » Tue Apr 10, 2018 4:02 pm

Dude, that magazine system is so cool it's ridiculous.

The whole thing is awesome, obviously, but that mag... Rube Goldberg meets Machinery and it works!!!!
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Re: BFG #7

Unread postAuthor: farcticox1 » Wed Apr 11, 2018 4:15 pm

It started simple in my head, then got a bit more complicated, but it does work nicely.
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Re: BFG #7

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Re: BFG #7

Unread postAuthor: farcticox1 » Sun Apr 29, 2018 12:50 pm

New video of updates to BFG :D

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Re: BFG #7

Unread postAuthor: hectmarr » Sun May 06, 2018 11:23 am

Very nice weapon! I loved it. regards :)
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Re: BFG #7

Unread postAuthor: farcticox1 » Sun Jun 24, 2018 11:00 am

Tested my chrono device, it shows a consistent 416fps at 140psi. 10mm steel BB is about 4.5gms/69.4gr.
Muzzle energy = 27ft.lbf/36joules. :shock:
I'm changing the PVC chamber/stock for a stainless one, it has less volume but I will feel safer taking it up to higher pressures. Going to do the same chrono test when I get it assembled again.
chrono (1).jpg
chrono (2).jpg


New stainless chamber. I like the adjustable stock better.
chrono (3).jpg
chrono (4).jpg


The results are in, new chamber at 140psi = 357fps, 160psi = 385fps :P
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Re: BFG #7

Unread postAuthor: Potato Demon » Sun Nov 25, 2018 11:30 pm

I know this is an old thread but... Nice! It looks a bit like a vector...
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The weird thing is my only source of compressed air is a bike pump!

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Re: BFG #7

Unread postAuthor: farcticox1 » Mon Nov 26, 2018 5:26 am

Well spotted, that's the profile I used :D
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