Monster Pneumatic!

Just build a cannon and want to show it off? Post it in here.

Postby PSI » Wed Jan 31, 2007 5:46 pm

So after building a few spudguns I wondered if we could send a small watermellon, cantelope, or small pumpkin a long way.

Long story short here it is, all schedule 40 or better PSI and rated at near 800PSI for the main receiver air tanks. We have only gone to 150PSI as that is the max for my compressor.
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Edit: 8)
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Postby spudkilla » Wed Jan 31, 2007 6:04 pm

WOW! That is cool. Talk about coastal defence :]
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Postby SkweezMyCheez » Wed Jan 31, 2007 6:09 pm

Massive and very cool. I recommend getting rid of the bottle neck on the barrel and if the chamber has one, take care of that as well. This will increase flow ALOT and therefore your power will increase dramatically. What kind of valve is that?
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Postby shadowscion » Wed Jan 31, 2007 6:18 pm

Jeez that is huge. Pretty cool video of it being fired too.
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Postby An Apple Pie » Wed Jan 31, 2007 6:43 pm

That is really BIG. That looks like it would be really fun to shoot!
What type be the valve dude [:p].
An Apple Pie
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Postby Velocity » Wed Jan 31, 2007 7:01 pm

WOW! Go out, by a cheap rowboat, and anchor it to the bottom. See how many shots it takes to sink it!

EDIT: Could you possible provide some photographs of this beast?
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Postby SpudMonster » Wed Jan 31, 2007 7:03 pm

That's a Crocodile Dundee cannon :D "That's not a cannon mate, THIS is a cannon!"

It sure looks cool! With a good paintjob and a bit of cleanup, it'd look even better. I'd recommend eliminating the restriction between the barrel and valve. Also, is that valve a chamber-sealer? I've heard that barrrel-sealers have a faster opening time because of the more significant difference between the pilot square area and the sealing face square area. I'd also recommend that you use a MUCH larger valve for actuating the main valve. That blowgun is hurting your performance severely because it can't exhaust the main valve pilot area quick enough. I'd highly recommend getting a 1" sprinkler valve and using that to actuate the main valve. I guarantee that if you do those two things, you'll see a significant performance increase. Other than that, looks neat!

By the way, where are you located? That almost looks like a california coastline section.
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Postby Duodec » Wed Jan 31, 2007 7:28 pm


Hard to tell from the video, what kind of range are you getting?

Please give us some specs on that monster!
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Postby Hotwired » Thu Feb 01, 2007 7:22 am

Looks like one hell of a beast, is it completely metal?

I'd go with the getting something bigger than a blowgun to pilot it.

You can hear air hissing out well after the projectile has left the barrel.
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Postby emerson_gary » Thu Feb 01, 2007 10:07 am

DUDE - how much for that thing? Me like! Totally awesome...
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