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

1125152 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

552257 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...

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great job everyone
64 Replies

821189 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

967090 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

374894 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

92410 Views

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

Topics

Potential energy question???

Last post by Ragnarok
Replies: 3
by boyntonstu » Sat May 01, 2010 12:17 pm

First post

Is there a formula that calculate the potential energy of compressed air?

From Wiki

Thus if 1.0 m3 of ambient air is very slowly compressed into a...

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Thus if 1.0 m3 of ambient air is very slowly compressed into a 5-liter bottle at 200 bars (20 MPa)
I'm going to be pedantic and say that's not quite...

3 Replies

1869 Views

Last post by Ragnarok
Sat May 01, 2010 6:32 pm
I gotz a 35 bar pushbutton valve : )

Last post by Brian the brain
Replies: 47
by Brian the brain » Wed May 27, 2009 4:09 pm
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Like the title says,..
I built a push button valve, or hammer valve , that has greater flow than a blowgun, yet it can be pushed open by hand (...

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I have posted this on a public forum for all to see.

You can all copy anything I have ever posted, adapt it, flip it around and do whatever you...
47 Replies

18633 Views

Last post by Brian the brain
Sat May 01, 2010 2:07 am
The logic of a very tight projectile

Last post by Ragnarok
Replies: 19
by boyntonstu » Thu Apr 29, 2010 1:55 pm
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My experience with tight fitting cork based projectiles got me to thinking.

I noticed that a very tight projectile seemed more powerful than a...

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Is there a simulator that allows for different coefficients of friction at various points inside the barrel?
That's basically what I said about my...
19 Replies

6018 Views

Last post by Ragnarok
Fri Apr 30, 2010 3:57 pm
Piston valve not sealing (Pictures)

Last post by Matt_NZ
Replies: 15
by Matt_NZ » Thu Apr 15, 2010 5:18 am
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This is my first spud gun (attempt) from stainless steel pipe fittings.
The piston is just simple hot glue housed inside a 3/4 tee have a look at the...

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Update; I've constructed a piston out of nylon, completely remastered with floating O-rings and a new sealing face. Tomorrow I'll get to try it out...
15 Replies

5215 Views

Last post by Matt_NZ
Fri Apr 30, 2010 4:59 am
My First Pneumatic Cannon Fail

Last post by Moonbogg
Replies: 21
by ew23 » Sun Apr 25, 2010 5:36 pm
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Well never mind this is getting scraped asap lol

Last post

DWV PVC...if you use the cannon, wear eye protection. Like, seriously don't go without it. You might get a little cut or scrape here and there on...
21 Replies

6727 Views

Last post by Moonbogg
Fri Apr 30, 2010 2:38 am
Multi-shot designs?

Last post by jackssmirkingrevenge
Replies: 30
by hunternet93 » Wed Apr 28, 2010 2:46 pm
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I'm planning an airsoft spread launcher , and want a good multi-shot design. It needs to be pretty cheap, simple to build, and portable. My first...

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A simple blowgun with a barrel taped to it like so:

With 100 psi and lead pellets will happily penetrate a steel can, like so:

For a compact...
30 Replies

8692 Views

Last post by jackssmirkingrevenge
Fri Apr 30, 2010 12:25 am
My air cannon

Last post by clemsonguy1125
Replies: 14
by metalmeltr » Mon Apr 05, 2010 2:16 pm

First post

This is the air cannon that I built as a marshmallow gun. Origonaly it had a PVC chamber, but it broke so I replaced it with metal. Eventuallty I...

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I used the pvc at 200psi because the pressure rating was something in the range of 355psi.
Some PVC is rated as high as 1000 psi Ive heard but since...

14 Replies

6178 Views

Last post by clemsonguy1125
Thu Apr 29, 2010 6:44 pm
Good Valves for Airsoft guns?

Last post by Gun Freak
Replies: 17
by Marffy » Wed Apr 28, 2010 7:31 pm
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I am making a lever action revolving airsoft rifle. But i need a valve for it. I don't know if i should use a QEV or a blow gun or solenoid. (i'd...

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I could just picture that happening lol
17 Replies

4847 Views

Last post by Gun Freak
Thu Apr 29, 2010 5:46 pm
Bondo Piston

Last post by clemsonguy1125
Replies: 12
by clemsonguy1125 » Mon Apr 26, 2010 2:55 pm

First post

For my compact piston valve, I casted a bondo piston to slide in the bushing. I was planning to use a rubber gasket as the bumper but will this be...

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Well since I already built it Ill try it but your probably right, If it breaks Ill just uses a 1 1/2 inch plug sanded down

Edit-Just found...

12 Replies

3095 Views

Last post by clemsonguy1125
Thu Apr 29, 2010 3:06 pm
Golfball hand cannon

Last post by matti
Replies: 8
by matti » Sat Apr 24, 2010 11:22 am

First post

Hi, nothing special here, just an ordinary sawn-off pneumatic :D

- Valve is 1 ,BUSCHJOST, 24v Indirectly solenoid actuated Diaphragm valve ( ..it...

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How did you modify the co2 bottle for the 1 porting? Is that welded? I've been wanting to use a repurposed high pressure tank as the chamber on my...

8 Replies

5491 Views

Last post by matti
Thu Apr 29, 2010 2:03 pm
My First Pneumatic - Mortar

Last post by deathbyDWV
Replies: 3
by saefroch » Wed Apr 28, 2010 9:07 pm

First post

This is the first pneumatic cannon I have built and bothered to post on spudfiles. I built one rather ghetto design with the chamber and firing...

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The only problem is whether they will fit past the big theads and not be small enough to fall out the back...

3 Replies

2600 Views

Last post by deathbyDWV
Wed Apr 28, 2010 11:22 pm
Moding a QEV

Last post by POLAND_SPUD
Replies: 27
by irisher » Tue Apr 27, 2010 5:40 pm
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For a repeating pneumatic I plan on using a QEV. I have heard that for them to repeat a hole on the piston/diaphragm and a spring is required. I...

Last post

then I guess it might work... PM BtB as he has some experience with it
27 Replies

6118 Views

Last post by POLAND_SPUD
Wed Apr 28, 2010 9:54 pm
Pneumatic speargun

Last post by twizi
Replies: 12
by twizi » Mon Apr 19, 2010 6:21 pm

First post

hey guys i was thinkin about making a pneumatic spear gun i think i am gonna make a 4 foot long coaxil that will be pumped to a certin presure(dont...

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the pneumatic one i made was to big and bulky and powerful for reef diving i am fixing it up for ocean spearfishing this is why i am making this cool...

12 Replies

8371 Views

Last post by twizi
Wed Apr 28, 2010 8:17 pm
GGDT question

Last post by saefroch
Replies: 2
by saefroch » Wed Apr 28, 2010 10:18 am

First post

Looking through the list of factors GGDT accounts for, I found this: Gas leakage from the main valve body into the upper valve chamber (pilot)....

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Thanks. The programs must have been a great undertaking, but for the results they yield, they're well worth it.

2 Replies

2371 Views

Last post by saefroch
Wed Apr 28, 2010 2:01 pm
super cannon

Last post by psycix
Replies: 23
by kydavies » Mon Apr 26, 2010 6:14 pm
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my 9 foot tall super cannon i built for my nieghboor, it shoot 1.5 inch potatos hundreds of meters!!!

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Looks very large and powerful, however, it appears in uses a ball valve. BV's have high flow, but very slow opening times. You would be much better...
23 Replies

7368 Views

Last post by psycix
Wed Apr 28, 2010 12:23 pm
Points of discussion, pneumatic tanks.

Last post by j.hacko
Replies: 18
by j.hacko » Sun Apr 25, 2010 6:29 pm
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Hai forum! This is my first post, so ill start from the beginning.

I've been an active spud gunner for a while, but have only received half of...

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Oh sorry thats what I meant :? but thanks anyway i think ill go for a piston valve they look much neater :)
18 Replies

6095 Views

Last post by j.hacko
Wed Apr 28, 2010 12:46 am
Size of Schrader Valve Hose?

Last post by chinnerz
Replies: 1
by silverwolfx » Tue Apr 27, 2010 10:05 pm

First post

I just built a custom airgun used for nerf. I curretly have a schrader valve that I use to fill it.

What I am looking for is a flexible hose that I...

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buy a $2.00 pump, one of those ones with a flexi connector... that would be your best bet

1 Replies

1138 Views

Last post by chinnerz
Tue Apr 27, 2010 11:45 pm
Propane as a compressed air source

Last post by Lentamentalisk
Replies: 11
by vex » Tue Apr 27, 2010 1:16 pm

First post

I have two questions:

1. Would propane make an ok compressed air source for a Pneumatic cannon? Not talking about a combustion cannon. I have a big...

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Propane's SoS is lower, because it is heavier. That also means it has more mass, which if you are not pushing the SoS, will give you better results....

11 Replies

2931 Views

Last post by Lentamentalisk
Tue Apr 27, 2010 11:43 pm
Portable Tank Calculator

Last post by Hubb
Replies: 5
by Hubb » Tue Jan 26, 2010 10:31 am

First post

Some of you may be familiar with my CO2 calculator. If not, don't worry about it. This calculator is an updated version, geared specifically to...

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Yes, Tech. Technically, that would qualify as a portable air tank. :D

5 Replies

3737 Views

Last post by Hubb
Tue Apr 27, 2010 7:14 am
A few questions on chamber length and pistons

Last post by SpudBlaster15
Replies: 10
by jmccalip » Sun Apr 12, 2009 8:13 pm

First post

I am building a golf ball cannon, and I currently have( not glued ):

10ft of 4 pressure rated PVC
10ft of 1.5 SDR 21 PVC sleeved in 2 shd...

Last post

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse...

10 Replies

3504 Views

Last post by SpudBlaster15
Tue Apr 27, 2010 5:42 am
Fire Extinguisher valve....

Last post by jackssmirkingrevenge
Replies: 14
by Bersa » Mon Mar 29, 2010 3:42 pm

First post

Hello! I'm REALLY new to SPUD gun, but also really want to build one... I'd like to build a pneumatic one (just for fun), and thinking about a valve...

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I'm sure that these can also be modded, it's just a question of replacing the solenoid with a blowgun.

14 Replies

4075 Views

Last post by jackssmirkingrevenge
Tue Apr 27, 2010 2:40 am
size vs. pressure

Last post by Technician1002
Replies: 5
by covey12 » Mon Apr 26, 2010 2:52 pm

First post

so i was just randomly thinking and figured i just put it up here, would there be a functional difference between a large chamber with low pressure (...

Last post

Oops posted in the link bumping it. Post moved here where it belongs;

I like your numbers. I need to put together a fridge compressor for my...

5 Replies

1551 Views

Last post by Technician1002
Tue Apr 27, 2010 12:22 am
DEAD 43mm (GB) Semi-Auto Video 2!

Last post by c11man
Replies: 46
by c11man » Tue Apr 20, 2010 10:05 pm
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made a new video with a more challenging target for you guys. im not too sure what happened to the sound but i just wanted to get the video up and...

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a valid concern but already taken care of. semi auto will not pose this problem because it is slower but in full auto the 555 timmer will be...
46 Replies

14180 Views

Last post by c11man
Mon Apr 26, 2010 11:00 pm
Hubb's 2" piston

Last post by Gun Freak
Replies: 21
by Gun Freak » Sat Apr 24, 2010 7:11 pm
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Here are Reedfe and I's dual 2 pistons, Hubb's design.

I blow through the back hole and air comes out the front ones, as expected.

But I blow...

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Well I have one o-ring in the rear and I'm putting one also in the middle. So two o-rings. But the cap idea seems ok too, wouldn't it be the same...
21 Replies

5504 Views

Last post by Gun Freak
Mon Apr 26, 2010 7:47 pm
My first spring triggered pilot valve

Last post by Brian the brain
Replies: 16
by boyntonstu » Fri Apr 23, 2010 6:58 pm
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At the moment I am getting inconsistent chrono readings because of my manual opening of my pilot.

10d nail 184 gr 879 fps 600 psi
192 701
180 658...

Last post

When the pump-a handle hits-a your teeth, like a big-a pizza pie

I'm not sjhhhure what you are reffferring to..
That front tooth still hurts once...
16 Replies

4899 Views

Last post by Brian the brain
Mon Apr 26, 2010 3:34 pm

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