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3D Printed Quick Dump Valve

Last post by Flash « Wed Apr 29, 2026 7:45 am
Replies: 1
by Flash » Wed Apr 29, 2026 12:41 am » in Pneumatic Cannons

First post

I designed a 3” diameter quick dump valve cannon using a novel trigger mechanism. It’s printed in PETG, has a 2 L air tank, an 18” barrel, fires a...

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Here’s a clip showing how it’s pressurized using a bike pump, the loading process, and a shot at a more modest 45 PSI. The TPU stock butt pad does a...

1 Replies

5356 Views

Last post by Flash
Wed Apr 29, 2026 7:45 am
Compression?

Last post by overdraft « Mon Apr 27, 2026 12:48 pm

by overdraft » Mon Apr 27, 2026 12:48 pm » in Combustion Cannons

Hi All!
I'm making a basic spud gun for an upcoming distance competition that is restricted to hairspray as fuel.
Obviously combustion in engines is...

0 Replies

6603 Views

Last post by overdraft
Mon Apr 27, 2026 12:48 pm
Workin' on a coaxial sleeper build

Last post by Moonbogg « Fri Apr 24, 2026 5:07 pm
Replies: 5
by Moonbogg » Mon Apr 20, 2026 2:32 pm » in Hybrid Cannons

First post

Looks like an average cannon until you see the inside. I used the chamber volume efficiently for valve design to maximize flow with no restriction; 1...

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I'm trying to simplify this thing as much as possible; less parts, less machining, less weight, less cost, while having the chamber volume I want. I...

5 Replies

6167 Views

Last post by Moonbogg
Fri Apr 24, 2026 5:07 pm
2 Inch QEV Cannon

Last post by nleroux « Mon Apr 20, 2026 10:50 am
Replies: 37
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by Jamzearljones » Thu Nov 09, 2017 3:33 am » in Pneumatic Cannons

First post

This is my first attempt at a spud gun, and while I have yet to launch a potato, I am thoroughly pleased with the results. A lot of credit goes out...

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Hi Jamzearljones,
Could it be possible yo use one of you image that you posted this one: for a televison show? Could you write me to my email adress:...
37 Replies

23891 Views

Last post by nleroux
Mon Apr 20, 2026 10:50 am
Leveraging server-grade hardware for high-precision cannon simulations?

Last post by boteh35959 « Mon Apr 20, 2026 9:01 am

by boteh35959 » Mon Apr 20, 2026 9:01 am » in Off-Topic Hobbies

Hey guys,
I’ve been a long-time fan of the technical depth on this board. Lately, I've been getting really into the weeds with valve efficiency and...

0 Replies

3657 Views

Last post by boteh35959
Mon Apr 20, 2026 9:01 am

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