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Mini BB coaxail-full metal

Built a miniature 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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Mini BB coaxail-full metal

Unread postAuthor: qwerty » Fri Aug 21, 2009 7:49 am

Here is my new and first piston BB coax made with 15mm copper and some other parts.
I struggled to get this to work but finally wrapped some tape around the piston.
Strangly enough you can fill it up from the barrel aswell :D
Any tips welcome.
Here are the pics.
Image





Image





Image






Image







Image







There! :D
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Unread postAuthor: twizi » Fri Aug 21, 2009 7:52 am

whats the piston made of
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Unread postAuthor: qwerty » Fri Aug 21, 2009 7:53 am

Two little car wheels glued together :)
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Unread postAuthor: qwerty » Sun Aug 23, 2009 2:07 am

Update! Damage pics :twisted: I chronied this at 100 PSI and i got 521fps
BTW that wood is 3mm thick
Image
This was by accident after going through an apple :D


Image
Pin through a penny :)



Image
and...... a box



ive ordered this shock pump and i cant wait for it to arrive.
http://www.chainreactioncycles.com/Models.aspx?ModelID=38214


Im getting a solid nylon piston off wildebeers so i can use that at 300 PSI
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Unread postAuthor: rna_duelers » Sun Aug 23, 2009 2:14 am

Now that's cool.How does it go with sinkers or similar heavy shot?If you've used ammo like that.

I've got to make myself a small bore pneumatic sometime :idea: nice simple and a bit of power :twisted:
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Unread postAuthor: qwerty » Sun Aug 23, 2009 2:18 am

Thanks ive only used bbs at the moment because i cant find the fishing shot
and ive allready used up the 6mm ones for other guns

(Which is better FORE!!!!s or mine)
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Unread postAuthor: FORE!!!! » Sun Aug 23, 2009 3:41 am

qwerty wrote:Thanks ive only used bbs at the moment because i cant find the fishing shot
and ive allready used up the 6mm ones for other guns

(Which is better FORE!!!!s or mine)


I smell a showdown :twisted: :twisted: :twisted:
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

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Unread postAuthor: inonickname » Sun Aug 23, 2009 3:49 am

FORE!!!! wrote:
qwerty wrote:Thanks ive only used bbs at the moment because i cant find the fishing shot
and ive allready used up the 6mm ones for other guns

(Which is better FORE!!!!s or mine)


I smell a showdown :twisted: :twisted: :twisted:


Can I join in? I just finished and tested my co-ax.. :lol:
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Unread postAuthor: FORE!!!! » Sun Aug 23, 2009 3:53 am

GULP!! :idea:
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Unread postAuthor: qwerty » Sun Aug 23, 2009 4:15 am

Can I join in? I just finished and tested my co-ax.. Laughing


Show us a pic then we will decide. :)
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Unread postAuthor: inonickname » Sun Aug 23, 2009 4:25 am

I'll post it tomorrow after more tests (400 psi).

You can have a sneak peak I suppose..I still need to cast the aluminum foregrip, grip, bipod etc..

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Piston and barrel support, with chamber and barrel in background..
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Unread postAuthor: qwerty » Sun Aug 23, 2009 4:28 am

Ummmmmmmm.......... no :D
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Unread postAuthor: FORE!!!! » Sun Aug 23, 2009 5:09 am

@qwerty
what pressures are u using??

and what is the bore size of ur barrel?
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Unread postAuthor: qwerty » Sun Aug 23, 2009 5:26 am

At the moment im using around 100 psi and its 6mm barrel.
but did you see that shock pump i put on?
I cant wait for some 300psi damage pics with a solid nylon piston :twisted:
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Unread postAuthor: inonickname » Sun Aug 23, 2009 5:39 am

It's pretty devastating even with the low (300 psi) pressure..400 should be monstrous.

It's been punching nice holes in everything I've thrown at it, any requests for targets?
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