Throwbag Cannon

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
Aaroneous
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Thu Mar 24, 2022 12:11 pm

Built this for my volunteer FD. We're going to be using it to launch a throwline over a roof and pull over an anchor rope when dealing with flue fires next season.

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farcticox1
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Fri Mar 25, 2022 7:33 pm

Is that ABS ? what psi do you run in it ?
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Anatine Duo
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Sat Mar 26, 2022 7:50 am

always nice to see practical applications
Aaroneous
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Tue Mar 29, 2022 6:21 am

farcticox1 wrote:
Fri Mar 25, 2022 7:33 pm
Is that ABS ? what psi do you run in it ?
Yes. Still working it out, but 100 was WAY too much... Would have cleared a six story building with room to spare.

... Home depot was out of pvc.
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farcticox1
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Tue Mar 29, 2022 3:40 pm

[/quote]

Yes. Still working it out, but 100 was WAY too much... Would have cleared a six story building with room to spare.

... Home depot was out of pvc.
[/quote]

Good job, PVC is not rated for gas pressure.
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Moonbogg
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Tue Mar 29, 2022 9:11 pm

PVC vs ABS crush test


PVC air pressure failure


ABS air pressure failure


ABS wins.
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farcticox1
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Wed Mar 30, 2022 6:29 pm

Interesting that DWV which has no actual pressure rating is better at using for pressure applications than PVC which actually has a pressure rating but is not actually rated for gas pressure. :?
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Anatine Duo
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Sat Apr 02, 2022 7:46 pm

More important for me is the failure mode. PVC makes sharp shrapnel, most ABS yawns or makes squared off pieces.
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