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New Guy, want ideas for a pnematic tennis ball mortar

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: duane » Sat Aug 10, 2013 4:12 pm

Blitz, and Gun Freak,

I've played with GGDT a good bit now, and what you've suggested seems absolutely correct at higher chamber pressures.

For lower chamber pressures (75 PSI) it seems like a high chamber volume, and a shorter barrel would work better.

I'll keep running the numbers though.

Thanks,

Duane
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Unread postAuthor: duane » Mon Aug 12, 2013 5:53 pm

Well, most of my parts arrived today, thanks to my friendly brown truck driver. :)

I'll try rounding up the other odds and ends, and try putting it together this week-end.

In the meantime, I'm still playing with GGDT.

Thanks,

Duane
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Unread postAuthor: Blitz » Tue Aug 13, 2013 9:29 pm

Woohoo. Pics! :)
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Unread postAuthor: duane » Tue Aug 13, 2013 10:32 pm

Blitz,

Pictures will come. Be patient. Old men don't move fast. 8)

Thanks,

Duane
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 13, 2013 11:28 pm

duane wrote:thanks to my friendly brown truck driver


That sounds vaguely like a terrible euphemism :D
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Unread postAuthor: Blitz » Tue Aug 13, 2013 11:29 pm

My truck driver's brown too. But telling him that sounds racist.
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Unread postAuthor: duane » Wed Aug 14, 2013 4:55 pm

:lol:

http://www.youtube.com/watch?v=ZPVnkX2-ygU

I love it when my friendly brown truck driver pulls up outside.

8)

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Unread postAuthor: Blitz » Thu Aug 15, 2013 4:40 am

Heehee, I know the feeling.

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Unread postAuthor: Gun Freak » Thu Aug 15, 2013 7:17 am

That's how I felt when I was waiting for my 2" piston valve parts from plumbing supply 8)
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Unread postAuthor: Blitz » Thu Aug 15, 2013 6:19 pm

Gun Freak wrote:That's how I felt when I was waiting for my 2" piston valve parts from plumbing supply 8)


Such a feeling of glee. Almost euphoric. Can definitely feed poor spending habits. :)
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Unread postAuthor: Gun Freak » Thu Aug 15, 2013 6:22 pm

I just love the idea of being able to see something online and have it magically materialize at my doorstep in a couple days :D
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Unread postAuthor: Blitz » Thu Aug 15, 2013 6:23 pm

You'd almost think it was materialized out of thin air just for you. But then, it shouldn't take so long to arrive then. :)
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Unread postAuthor: Gun Freak » Thu Aug 15, 2013 6:26 pm

I suppose, but teleportation can't be too far away in the future! :D
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Unread postAuthor: duane » Mon Aug 26, 2013 5:31 pm

Well, I've made a "little" progress. 8)

After playing with performance numbers from GGDT, my idea for a tennis ball mortar turned into a tennis ball cannon. Maybe next time. :)

Sorry about the crappy photo... I am not known for my photography skills.

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I've still got to come up with a way to brace the muzzle end of the barrel to the chamber. It's way too long and floppy for my liking.

Duane
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Unread postAuthor: Blitz » Mon Aug 26, 2013 5:41 pm

You got a few options. You could cut out a bracket and then zip tie the barrel and chamber together, for example. Or a large hose clamp. Or something. :)
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