Pneumatic Cannons

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SpudFiles Potato Gun Commercial

Last post by quinn whitsitt
Posted in Combustion Cannons
Replies: 15
by PCGUY » Tue Oct 29, 2013 10:54 pm » in Combustion Cannons
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I've been wanting to get in some spud shooting action this fall before the weather got cold. I know it's been a while since I filmed anything for...

Last post

thank you for creating this website is there anything i can do to help
15 Replies

1206311 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Directional Control Valves (3way valves and stuff like that)

Last post by jpalf1
Replies: 86
by POLAND_SPUD » Sun Mar 07, 2010 1:12 am
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Directional Control Valves, commonly refereed to as 3,4,5 etc. valves or spool/poppet valves etc., can be very useful for spuders.
They can be used...

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very,useful info for a beginner such as myself.The links are great as well.Thankyou.(you won't believe this but as i was reading,my fridge comp...
86 Replies

606316 Views

Last post by jpalf1
Sat Apr 13, 2013 10:53 am
Sprinkler Valve Troubleshooting Guide

Last post by quinn whitsitt
Replies: 64
by noname » Sat Jun 16, 2007 12:15 am
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Sprinkler Valve Troubleshooting

This is a guide to sprinkler valve problems. Before creating a new topic to ask questions on why your valve isn't...

Last post

great job everyone
64 Replies

858906 Views

Last post by quinn whitsitt
Thu Feb 22, 2024 2:18 pm
Piston Valves Explained Visually

Last post by pavina
Replies: 178
by clide » Mon May 14, 2007 11:21 pm
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I had this posted on Spudtech, but I am reposting it here to hopefully help some people out and allow for discussions/updates.

Well I made this...

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Thanks for sharing this! It might also be useful to mention how friction and maintenance can affect performance over time. Looking forward to more...
178 Replies

1022189 Views

Last post by pavina
Fri Sep 27, 2024 4:05 am
"How Much CO2 do I need?"

Last post by choke
Replies: 32
by BC Pneumatics » Sun Apr 01, 2007 9:52 pm
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For all those people out there looking for a rough idea of how much CO2 they will need for a chamber of any given size-
Just multiply the volume of...

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Great piece of software :) I've been kicking numbers round my head for a while now, and wondered if someone here could confirm. I'm filling a 1.5 dia...
32 Replies

393218 Views

Last post by choke
Thu Jul 04, 2013 2:38 pm
Valve Cutaways

Last post by jhalek90
Replies: 8
by PCGUY » Sat Feb 26, 2005 9:10 pm

First post

VALVE CUTAWAY

Provided By - Longshot

These are some pictures of some of the most popular valves used on spud cannons. Only difference is, these...

Last post

Can someone fix the picture links??

8 Replies

100341 Views

Last post by jhalek90
Wed Oct 07, 2009 2:13 pm

Topics

First cannon results (sort of)

Last post by jared555
Replies: 12
by jared555 » Sun Jan 04, 2009 4:56 am

First post

Well I just got back from playing with my cannon. It was indoors so I was limited on my ammo choices..... Sorry that I don't have any pictures yet,...

Last post

...

And your point in posting this message is? If it is because of the 'I don't feel like desoldering' comment.... it works and removing the solder...

12 Replies

4117 Views

Last post by jared555
Mon Jan 05, 2009 4:57 pm
Push button valve question

Last post by btrettel
Replies: 16
by btrettel » Tue Dec 30, 2008 4:42 pm
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I've been eying McMaster-Carr part # 62475K11 for a while. I intend to use it to both pilot and refill my air chamber in a new gun I'm planning....

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My three-way ball valve finally came in. From my quick look at it, it seems nearly perfect aside from the price. Turning the valve is easy. I should...
16 Replies

5501 Views

Last post by btrettel
Mon Jan 05, 2009 12:06 pm
The BigDelicious

Last post by SaggingBaggage
Replies: 22
by SaggingBaggage » Tue Dec 30, 2008 11:31 pm
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This is my first cannon, the BigD :lol:. Despite its looks its actually quite ergonomic! I made it within 24 hours of finding this site, actual...

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lol, well i was gunna paint this one and move the trigger to the back, and the tank was so big because i thought i could get multiple shots out of...
22 Replies

8672 Views

Last post by SaggingBaggage
Mon Jan 05, 2009 11:07 am
hop-ups for tennis balls

Last post by jrrdw
Replies: 12
by FishBoy » Sun Jan 04, 2009 5:24 pm

First post

Would a hop-up (machine screw @ end of barrel) work on a somewhat large tennis ball gun? Or would it just end up snagging fuzzies?

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You need to leave a little air space for the ice to expand. Put the hole the needle leaves straight up so only the air will escape.

12 Replies

2649 Views

Last post by jrrdw
Mon Jan 05, 2009 10:57 am
Valve question

Last post by MrCrowley
Replies: 1
by us sniper » Mon Jan 05, 2009 12:23 am

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I was wondering if filling a piston valve would increase the valve's efficiency. Below is a link of the simulated valve. I thought that the released...

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Well you haven't design the common piston valve, I think the least of your worries is filling the volume inside the tee. Your design is also a...

1 Replies

1195 Views

Last post by MrCrowley
Mon Jan 05, 2009 12:55 am
My New Cannon BIG BOY and Some Questions with Pics!

Last post by SP00K
Replies: 31
by Braddubya » Sun Jan 04, 2009 2:10 pm
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This is my first Pneumatic Cannon and I think im going to call it Big Boy

Beer can to show the scale

This is only a rough testing stage....

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kickback

Gaaaaah! I hate when people say kickback instead of recoil! Or even worse: when they say backshot. *shudders*

Oh well, too bad about the...
31 Replies

9003 Views

Last post by SP00K
Mon Jan 05, 2009 12:33 am
Computer modeling

Last post by btrettel
Replies: 11
by btrettel » Tue Dec 23, 2008 10:24 pm

First post

I had started writing my own computer model to help me optimize my air guns. I can use GGDT, yes, but I like to do things myself and as an engineer I...

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Wikipedia explains the basic 4th order Runge-Kutta method in all the detail you should need.

If you're unfamiliar with differential equations you...

11 Replies

5951 Views

Last post by btrettel
Sun Jan 04, 2009 7:31 pm
The Log Splitter

Last post by Daltonultra
Replies: 20
by Daltonultra » Sat Jan 03, 2009 3:42 am
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The Log Splitter:
Interchangeable barrel, currently 10'x2
4 PVC U shaped chamber, approx 1580 cubic inches
Rainbird PGA-200 sprinkler valve, 3/8...

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That's awesome. Is that your video on youtube of a collage of things exploding with a spudgun. The cannon looks almost exactly like the one you...
20 Replies

6324 Views

Last post by Daltonultra
Sun Jan 04, 2009 3:52 pm
Pneumatic gun efficiency

Last post by btrettel
Replies: 16
by btrettel » Wed Dec 24, 2008 1:16 pm
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I'm planning on optimizing a new small air gun of mine for efficiency at a certain range. This required me to write some rudimentary computer models...

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I've run a good deal more simulations as I improved my computer model, so I have a pretty good idea of what improves efficiency and what doesn't....
16 Replies

7958 Views

Last post by btrettel
Sun Jan 04, 2009 11:21 am
shraders with threads

Last post by starman
Replies: 21
by dudeman508 » Sat Jan 03, 2009 9:57 pm
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Can i buy a shrader with threads that i can attach to a regular 1/8in. coupling bought at Home Depot. I have a shrader that i took of a broken tire...

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Why ( I wonder ) do most people STILL talk about using schrader valves, when a better (and safer) way to fill your chamber is with a 1/4 Ball Valve,...
21 Replies

6478 Views

Last post by starman
Sun Jan 04, 2009 2:25 am
2" piston mauler valve

Last post by MrCrowley
Replies: 1
by jmeyer1022 » Sun Jan 04, 2009 1:07 am

First post

I'm looking for a step by step on building one, I've seen a really brief outline of it with the parts but no assembly instructions, I've built my...

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Well you wont be able to build a mauler as that requires a lathe, but a normal 2 piston valve wont be too difficult.

Check out my how-to for this...

1 Replies

716 Views

Last post by MrCrowley
Sun Jan 04, 2009 1:23 am
pneumatic cartridge design

Last post by sputnick
Replies: 16
by sputnick » Mon Dec 29, 2008 2:22 pm
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Recently, I have become interested in pre-charged pneumatic cartridges, and having an idea, I went ahead and designed this...

The green is a pipe...

Last post

Sorry, it did not attach... here it is again :shock:

I appologise for some of the spelling mistakes, and it is supposed to say the disc would be...
16 Replies

5960 Views

Last post by sputnick
Sat Jan 03, 2009 9:48 pm
Semi Auto plans

Last post by jitup
Replies: 12
by jitup » Wed Dec 31, 2008 2:49 pm

First post

Hello these are my plans for a semi auto. It will shoot power popper rounds, since I am not allowed to shoot marbles. (my parents are worried about...

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Thanks for the info! I think I will keep looking for the right size compression spring, maybe I can trim one. seems like a hassle if you don't have...

12 Replies

5328 Views

Last post by jitup
Sat Jan 03, 2009 4:21 pm
Leak problem

Last post by jitup
Replies: 9
by jitup » Wed Dec 31, 2008 3:27 pm

First post

Hello I built the below cannon recently, and was not planning to unvail it until it was 100% finished, but I have come for help. the problem I a...

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Thanks for all the suggestions. I will try and use some plastic epoxy, and if that dosen't due the trick I will use a bushing

9 Replies

4306 Views

Last post by jitup
Sat Jan 03, 2009 3:36 pm
What to use as air source

Last post by Big Boom
Replies: 3
by Bman8 » Fri Jan 02, 2009 10:23 pm

First post

I am new to spud guns and such. I am thinking of building a golfball cannon. I have it mostly planned out and the only a few things left. I am...

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I have thought about using GGDT in the past, but have afraid of downloading it only to discover it doesn't work on my imac. And no, I do not have...

3 Replies

1727 Views

Last post by Big Boom
Fri Jan 02, 2009 11:04 pm
Piston or no piston

Last post by roboman
Replies: 10
by ralphd » Fri Jan 02, 2009 11:05 am

First post

I am a long time combustion fan but now I am considering going pneumatic, well at least for my next launcher. I would appreciate some advice from you...

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It all depends on the efficiency and chamber size of the cannon. If there is just enough air to fill the barrel, then there won't be much left over...

10 Replies

2302 Views

Last post by roboman
Fri Jan 02, 2009 8:09 pm
Building a new cannon

Last post by maggotman
Replies: 24
by maggotman » Tue Dec 23, 2008 6:56 pm
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ok im sure if you seen my last cannon it was a bit getto and looked crap

so heres the start of the new one

the valve...

Last post

some damage pics
at 80 to 100psi
i wish i could use it to its full potential but its just to loud

firing a 7/8 socket its about 31mm wide no wadding...
24 Replies

6074 Views

Last post by maggotman
Fri Jan 02, 2009 1:58 pm
Semi-auto idea

Last post by jackssmirkingrevenge
Replies: 13
by Easterbunny » Thu Jan 01, 2009 7:31 pm

First post

Looking around I have seen many wonderfully complex mechanical answers to the semi auto problem in spudding. After having several nerf wars with...

Last post

One problem you might run into is the fact that sprinkler valves tend to take a while to seal up again.

I would use a mechanical reloading device...

13 Replies

3943 Views

Last post by jackssmirkingrevenge
Fri Jan 02, 2009 11:41 am
Casting an epoxy piston with an o-ring?

Last post by Sticky_Tape
Replies: 3
by us sniper » Fri Jan 02, 2009 3:41 am

First post

I am currently building a T piston gun, and my design requires a piston with an o-ring. The piston would fit into a piece of 1/2 L copper pipe. I was...

Last post

I have something for you the o-ring is casted right into the fiberglass resin and it has a hot glue tip. Yeah Yeah it doesn't seal but it is an...

3 Replies

2571 Views

Last post by Sticky_Tape
Fri Jan 02, 2009 10:06 am
Two questions from a new cannon builder

Last post by ThumbzUpTheoden
Replies: 34
by jared555 » Sun Dec 28, 2008 8:48 pm
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I have been reading on the forums here for some time but just now am truly planning on doing something soon.

I am hoping to build a pneumatic cannon...

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That is an ingenious design for a lower power compressor, as most people will be able to use it. The only reason I have an air compressor is for...
34 Replies

10440 Views

Last post by ThumbzUpTheoden
Thu Jan 01, 2009 9:37 pm
Pressure needed

Last post by MrCrowley
Replies: 1
by ThumbzUpTheoden » Thu Jan 01, 2009 9:32 pm

First post

I recently made a golf ball barrel for my pneumatic and was wondering at what different pressures people shoot golf balls at.

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I don't see the point of this topic, you can shoot a golfball at any pressure you feel inclined to.

So if someone says I shoot my golfballs at...

1 Replies

1171 Views

Last post by MrCrowley
Thu Jan 01, 2009 9:34 pm
CO2 Gauge?

Last post by MrCrowley
Replies: 14
by SP00K » Thu Jan 01, 2009 2:25 pm

First post

I'm building a burst disk cannon where the disk is to be punctured instead of broken by air pressure. I was wondering if there's a special co2...

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Co2 in a 12 gram cylinder is NOT even close to 900psi. What are you guys smoking??? Even the paintball cylinders are well below that.
You do realise...

14 Replies

3311 Views

Last post by MrCrowley
Thu Jan 01, 2009 9:30 pm
problem with sprinkler valve

Last post by ThumbzUpTheoden
Replies: 6
by dash213 » Wed Dec 17, 2008 5:01 am

First post

hi guys

first time poster.

recently i built a pneumatic cannon, but cannot for the life of me get the valve to seal. i've pulled it apart and...

Last post

If it still leaks after you connect it to the compressor, try making the equalization hole smaller. I put epoxy over mine and then made the hole with...

6 Replies

1796 Views

Last post by ThumbzUpTheoden
Thu Jan 01, 2009 9:25 pm
Soda bottle or PVC?

Last post by ThumbzUpTheoden
Replies: 35
by elad311 » Mon Oct 13, 2008 3:47 am
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I want to build my 1st pneumatic and I don't know what to use as
a chamber:
1.75L Soda bottle, Or 2 1 foot long PVC
I don't know how much psi they...

Last post

sch.40 PVC does NOT explode at 100psi first of all. If you will be operating the gun at higher than maybe 25 or 30 psi, you really should be using a...
35 Replies

10662 Views

Last post by ThumbzUpTheoden
Thu Jan 01, 2009 9:09 pm
Fully Auto Airsoft Gun

Last post by blind909
Replies: 3
by blind909 » Wed Dec 31, 2008 3:48 pm

First post

Ok, i have made this gun before, but i am now revising it. i took the valve from a Nerf Magstrike(it fires extremely fast, and shoots bbs at high...

Last post

BUMP it is almost done!

3 Replies

1120 Views

Last post by blind909
Thu Jan 01, 2009 8:16 pm

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