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Assault gun with scope gone sniper update:04/08/08update)

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Assault gun with scope gone sniper update:04/08/08update)

Unread postAuthor: BlackH » Tue Jul 08, 2008 2:12 am

edit 4/08/08: now it works on 250psi and has a gluegun piston
shoots nice
damage pics soon!!!




This is my assault gun I just finished.
She works currently on 200psi (the pump can only handle so much, will make my own soon) and can work on only 10psi. The piston is made out of a broom handle (wood).
To keep the barrel flush in the middle I used a pvc sch40 pipe and sawed a gap out heated it up with boiling water and stuffed it in between the 2 pipes to keep it centre, worked like a charm!!!!

[youtube]http://www.youtube.com/watch?v=4FbPk3RCgNk[/youtube]
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Attachments
copper.jpg
first model
1.jpg
first model
2.jpg
first model
DSC00143.JPG
update 30/07/08 scope (did not like)
DSC01056.JPG
DSC01055.JPG
DSC01057.JPG
The screws solderd on
DSC01054.JPG
new gun
Last edited by BlackH on Mon Aug 04, 2008 3:42 pm, edited 6 times in total.
Breaking stuff with a Big Bang haven’t been this much fun!!!!!!!!!!


http://www.spudfiles.com/forums/bh-2400 ... 14078.html
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Unread postAuthor: Carlman » Tue Jul 08, 2008 3:39 am

nice one man!

need some damage :D
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Unread postAuthor: Cosmic Muffin » Tue Jul 08, 2008 7:25 am

yer mate, put a vid up
looks pretty sweet, would look especially nice with a stock + it would be better for accuracy. :wink:
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Unread postAuthor: starman » Tue Jul 08, 2008 8:14 am

Nice drawing there...and nice rifle as well! Looks like you've got a little extra pilot dead space there...might get on the nerves of a few pneumatic brainiacs that drift through... :wink:

Any performance pics/vids?
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Last edited by starman on Tue Jul 08, 2008 9:27 am, edited 1 time in total.
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Unread postAuthor: pizlo » Tue Jul 08, 2008 8:19 am

Great gun. I bet you could put 400 PSI in there no problem, so get going on that pump. Is this your first gun? I don't remember anything else from you.
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Unread postAuthor: BlackH » Tue Jul 08, 2008 9:04 am

Thank you tell me how big must i make the pilot this is my first piston gun? its about 1.5cm now?

O no its my second Pneumatic, and first piston, here is the other:

http://www.spudfiles.com/forums/bip-sni ... 14773.html

http://www.spudfiles.com/forums/bh-2400 ... 14078.html
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Breaking stuff with a Big Bang haven’t been this much fun!!!!!!!!!!


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Unread postAuthor: starman » Tue Jul 08, 2008 9:35 am

BlackH wrote:Thank you tell me how big must i make the pilot this is my first piston gun? its about 1.5cm now?


It's that length (not Dia) of pipe behind your piston that is your extra space. If you're happy with performance, then it should be fine. Lessening that space will offer you some percentage points more performance...possibly not very noticable in the real world however.
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Unread postAuthor: pocket » Tue Jul 08, 2008 10:16 am

needs a stock other wise good job

keep up the good work loved your other cannons :lol:
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Unread postAuthor: pizlo » Tue Jul 08, 2008 10:48 am

actually your pilot looks prertty darn small. I thought it was bigger at first sight.
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Unread postAuthor: Maniac » Tue Jul 08, 2008 11:25 am

It's that length (not Dia) of pipe behind your piston that is your extra space. If you're happy with performance, then it should be fine. Lessening that space will offer you some percentage points more performance...possibly not very noticable in the real world however.


Well actually in some cases having pilot volume can actually increase preformance according to GGDT and Jsr.
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Unread postAuthor: BlackH » Tue Jul 08, 2008 11:59 am

Yes it’s a coaxial with a over-under
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Unread postAuthor: magnum9987 » Tue Jul 08, 2008 12:18 pm

Technically it isnt an assault gun unless it uses intermediate rounds and has variable fire, but great job though.
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Unread postAuthor: psycix » Tue Jul 08, 2008 3:21 pm

Looks good, but,
-why not make it completely co-ax?
-If its exactly like in your diagram, then the blue piece of pvc that centers the barrel may be blocking flow too much.
For the rest, its a nice cannon, good luck with your pump. :)
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Unread postAuthor: BlackH » Wed Jul 09, 2008 1:12 am

the power then and now with the pvc in has the same power or it seems that way I just need some better ammo because im shooting small bolts now and they just dont have the weight of what lead must be and the marbles I found did not fit the barrel :(
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Breaking stuff with a Big Bang haven’t been this much fun!!!!!!!!!!


http://www.spudfiles.com/forums/bh-2400 ... 14078.html
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Unread postAuthor: starman » Wed Jul 09, 2008 1:38 am

pizlo wrote:actually your pilot looks prertty darn small. I thought it was bigger at first sight.


Sorry, ignore my comment about dead space...my brain was in dead space earlier today... :roll: I thought I saw your piston being in the tee in the middle...it's obviously in the rear coupler. Your dead space is fine.

Actually, a pretty nifty rifle you've got there. Again nice job.
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