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brass over under UPDATE WITH DAMAGE

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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brass over under UPDATE WITH DAMAGE

Unread postAuthor: c11man » Tue Oct 13, 2009 10:05 pm

this is my new all metal mostly brass small bore over under. i postitioned the valve verticly instead of horizontaly mostly to improve the looks. the main brass barrel is 34in long and is 1/4inch. i use this for bearings and my homemade slugs. i have a aluminum tube i slide into the barrel to convert it to .22cal for shooting airgun lead pellets. it is very nice to hold and i can shoot one handed suprizingly steady due to the weight being behind the grip.
SPECS:
chamber: .65id and 9in long 3 cubic inches
piston: in a 3/8 pipe nipple about .45in
barrel: .25cal: 36in 1.8 cubic inches C:B 1.7
.22cal: 36in 1.4 cubic inches C:B 2.1
preformace: lead air gun pellet: 550fps @ 150psi


and ill let the pics talk

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9112.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9112.jpg" border="0" alt="full gun"></a>
the full gun with all the supplies for shooting. gun, ammo, and saftey glasses incase of possible richoches.

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9113.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9113.jpg" border="0" alt="pilot area"></a>
veiw of the push button pilot and trigger lever and chamber end

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9115.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9115.jpg" border="0" alt="breach open"></a>
showing the breech open and with the .22cal barrel in. the breach is just a peice of brass that is a perfect fit over the barrel

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9116.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9116.jpg" border="0" alt="piston front"></a>
my lightweigh nylon piston

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9117.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9117.jpg" border="0" alt="hollow piston back"></a>
showing why its lightweight, its hollow

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9120.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9120.jpg" border="0" alt="ammo"></a>
my current ammo supply. pellets, homecast slugs, and bearings. all the funny colored slugs are hotglue but harder than standard hotglue. i use them for target practise because they are reusable unlike lead.

<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_9114.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_9114.jpg" border="0" alt="valve"></a>
and finaly the veiw of the back of the gun. inside of the bottom of the elbow on the pilot side is a cast/shaped hot glue bumber.
<a href="http://s696.photobucket.com/albums/vv321/c11man/?action=view&current=100_8835.jpg" target="_blank"><img src="http://i696.photobucket.com/albums/vv321/c11man/100_8835.jpg" border="0" alt="Photobucket"></a>
as requested here is the inside of the pushbutton valve

all comments and questions are more than welcome!

also i need some suggestions for damage pics

EDIT: added specs and a pushbutton valve pic[/code]
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Last edited by c11man on Sun Oct 25, 2009 9:46 pm, edited 5 times in total.
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Re: .22/.25 cal over under breachloading brass pneumatic

Unread postAuthor: jackssmirkingrevenge » Tue Oct 13, 2009 10:13 pm

c11man wrote:also i need some suggestions for damage pics


Metal sheeting is always worthwhile :)

Nice job, what pressures are you running this at?
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Unread postAuthor: c11man » Tue Oct 13, 2009 10:21 pm

i have had it up to 550psi and that is just crazy. but now something is wrong with my pump so im stuck with just 125psi. either way it kicks the crap out of the .22 coax i made.
and sheet metal depending on thickness might be a bit tough with my current ammo and pressures. 550psi and a shapened steel projectile should do the trick though
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 13, 2009 10:25 pm

where exactly does the piston sit?
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Unread postAuthor: c11man » Tue Oct 13, 2009 10:29 pm

its sits in a nipple between the lower 90 on the tee and the tee. so it sits at a right angle to most launchers.
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Unread postAuthor: jmadden91 » Tue Oct 13, 2009 11:15 pm

It looks great mate congrats. What does the piston seal against?
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Unread postAuthor: Moonbogg » Wed Oct 14, 2009 12:23 am

Nice gun man. Looks shiny. Hopefully we get a video.
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Unread postAuthor: psycix » Wed Oct 14, 2009 5:00 am

Clean build. Good job. :)
Any pictures of the pushbutton internals?
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Unread postAuthor: c11man » Wed Oct 14, 2009 7:57 am

thanks for the compliments guys. and shinyness is the reason i spent more to get almost all brass.
i have a pic of the push button internals on a computer tha i cant get to for 8 hours. its a rele simple pushbutton

the piston seats on a push to connect fitting that had lost the part to make it work. and even its brass

and a vid will prolly come this weekend, what do you want to see in it?
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Unread postAuthor: POLAND_SPUD » Wed Oct 14, 2009 10:04 am

hmm nice... it looks very hotwired if you know that I mean :D

not that there is anything wrong about it...

what pressures can you use ?
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Unread postAuthor: c11man » Wed Oct 14, 2009 2:21 pm

well ive tested to 550 but that pump broke so now i use my compressor and only get 125psi
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Unread postAuthor: qwerty » Wed Oct 14, 2009 2:33 pm

and a vid will prolly come this weekend, what do you want to see in it?


lots of damage things and maybe an accuracy test
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Unread postAuthor: c11man » Wed Oct 14, 2009 2:40 pm

well yeah it will have damage but what do you want to see get destoyed? and accuract means i have to make some sights for it, oh well.
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Unread postAuthor: c11man » Thu Oct 15, 2009 8:18 pm

i added some specs and a pic of the push button valve. now i going outside to hopefully get post worthy damage
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Unread postAuthor: qwerty » Fri Oct 16, 2009 5:19 am

shoot something metal, something like fruit, and wood.
Any estimates on fps? 700+?

Oh yeah, BTW what pump are you using to reach 550psi?
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