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In a post-Apocalypse world

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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In a post-Apocalypse world

Unread postAuthor: evilvet » Sun Feb 03, 2013 12:42 am

In a post-Apocalypse world when all you have left is $20 of plumbing fittings and some Meccano, what do you do to hold off the zombie hordes............

You build this for fun. An afternoon plinker for the kids.
    100psi on the compressor
    10mm plastic BB's
    Some tube from Bunnings (Home Depot for the rest of you)
    My 40 year old Meccano set
    Single shot breech loaded

To do is a tube mag, some sort of sights, flash suppressor, muzzle brake, bipod...................

Video maybe tomorrow

Edit:Added rear photo

Thanks to JSR for the idea and the tutorial on a cheapo QEV setup :D
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Unread postAuthor: jackssmirkingrevenge » Sun Feb 03, 2013 1:07 am

Excellent, looking forward to seeing it in action :)
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Unread postAuthor: evilvet » Tue Feb 05, 2013 5:33 am



Basic fire test

Target was about 5 metres, 100psi shots
The can is a standard food can, pretty solid tin plate.

Not bad considering the projectile is a plastic jewelry bead.
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Last edited by jrrdw on Sun Oct 20, 2013 2:23 pm, edited 1 time in total.
Reason: Fixed video.
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Unread postAuthor: wyz2285 » Tue Feb 05, 2013 7:59 am

I've started a post-apocalypse build contest on my FB page, you can join if you want :)
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: sagthegreat » Tue Feb 05, 2013 8:03 am

wyz2285 wrote:I've started a post-apocalypse build contest on my FB page, you can join if you want :)


It was my idea :P
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Unread postAuthor: evilvet » Wed Feb 20, 2013 4:54 am

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Unread postAuthor: jackssmirkingrevenge » Wed Feb 20, 2013 8:25 am

Yes it should work well, you connect the primary air source the the bottom, the normally open position to the pilot area and leave the third port open.

The description says 1/2" NPT threads but give the 11mm dimension, it's most likely 1/4" BSP.
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Unread postAuthor: evilvet » Wed Mar 13, 2013 3:03 am

http://www.ebay.com.au/itm/ws/eBayISAPI ... OC:AU:3160

I got this instead, did I do wrong and if not how do I plumb it ?

Ta muchly, sorry to be a dweeb on pneumatics.
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Unread postAuthor: wyz2285 » Wed Mar 13, 2013 3:23 am

You already got it? Money wasted. That valve is useless, I have no idea why it's called 2/3 valve, it's not even a DCV.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: jackssmirkingrevenge » Wed Mar 13, 2013 3:53 am

I tried one as well. City, as in "Welcome to City Wok!".
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Unread postAuthor: evilvet » Wed Mar 13, 2013 4:51 pm

Well poop, that was no fun.

Anyone got a link for a solenoid controlled three way that actually works, I am adding electrics to the toy for reload and a few other things so might as well pilot electrically as well.

TIA
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Unread postAuthor: wyz2285 » Wed Mar 13, 2013 5:08 pm

This
Kind expensive. Also note that all electric DCVs wast a tiny amount of air (exhausted to pilot the spool to charge the air flow) every time switched on.
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: POLAND_SPUD » Wed Mar 13, 2013 11:38 pm

note that all electric DCVs waste a tiny amount of air (exhausted to pilot the spool to charge the air flow) every time switched on.

This is true because most solenoid valves are indirect acting valves
but you can also get direct acting valves which don't waste air
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Children are the future

unless we stop them now
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Unread postAuthor: Jarrado » Thu Mar 14, 2013 12:10 am

What would be an example of a retail version. Though I think I will try to build a DYI version.
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Unread postAuthor: evilvet » Thu Mar 14, 2013 12:11 am

Thanks guys, I ordered this one

Once it arrives I will let you know how I go
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