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

1125046 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...

Last post

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

552179 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

821144 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...

Last post

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

967041 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

374866 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

92394 Views

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

Topics

Coaxial breechload

Last post by Selador
Replies: 15
by Selador » Mon Nov 08, 2010 3:50 am
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I was reading this thread:

The question was aksed: how do you breech load a coaxial?

The question was answered, but I have a different answer....

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In all your minis, have you ever considered an insulin pen as your basis ?

Anthing pen-like will fit a small co-axial, and a medical device would...
15 Replies

6482 Views

Last post by Selador
Thu Nov 11, 2010 1:49 am
DWV fittings question

Last post by Technician1002
Replies: 19
by mlz3000 » Tue Nov 09, 2010 7:38 pm
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I would rather be sure before I glue:

I plan on building a revised version of my first cannon.

I want to tap in the fittings into two layers as...

Last post

With a little care and tipping all the parts so gravity runs the drip to the end instead of along the pipe, primer runs are easily controlled.

Here...
19 Replies

6833 Views

Last post by Technician1002
Wed Nov 10, 2010 11:03 am
how do i make a piston valve

Last post by Gun Freak
Replies: 8
by qwert123 » Mon Nov 08, 2010 6:13 pm

First post

what is a good way to make a .75 to a 1 piston valve. it needs to be noob friendly a i don't want to have to modify plumbing parts :)
im too lazy to...

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Given that deplorable statement I'm surprised so many members offered their advice. Just buy a 3/4 QEV, it'll most likely be miles ahead anything you...

8 Replies

2495 Views

Last post by Gun Freak
Tue Nov 09, 2010 9:17 am
HP Large-Bore

Last post by Lockednloaded
Replies: 17
by Lockednloaded » Sat Oct 23, 2010 5:50 pm
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This is a gun I threw together out of mainly spare part. Its main purpose was to entertain and to awe, and I think it fits the bill. I didn't want to...

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Sorry jsr, no info on the bolts, I can open it up and get some pictures though. Also, how would I go about supporting the diaphragm for use at much...
17 Replies

7035 Views

Last post by Lockednloaded
Tue Nov 09, 2010 8:45 am
20mm Airgun MkII

Last post by HunterT
Replies: 6
by HunterT » Sun Nov 07, 2010 8:56 pm

First post

When building my first airgun/cannon I used DWV piping without knowing that it shouldn't be used for airguns. So I took apart that airgun and built...

Last post

Stepping out of your house to shoot is a little safer.

That was my logic. Thanks.

6 Replies

7430 Views

Last post by HunterT
Mon Nov 08, 2010 12:14 am
Is this valve alright to modify?

Last post by jackssmirkingrevenge
Replies: 7
by BFC » Sun Nov 07, 2010 2:21 pm

First post

Hey,

Im looking at sprinkler valves and I can get this valve :

the Irritrol 216b 1 1/2in

can it be modified to open with a blowgun or pilot...

Last post

Let's not forget one of our benevolent sponsors ;)

7 Replies

3533 Views

Last post by jackssmirkingrevenge
Sun Nov 07, 2010 10:55 pm
Smoothbore Barrel?

Last post by jackssmirkingrevenge
Replies: 13
by BeaverRat » Sat Nov 06, 2010 11:39 pm

First post

Hello, I have recently completed my 3/4 inch high pressure cannon, but I need a nice barrel for it. Seamless steel and aluminum is too expensive....

Last post

Why has no one mentioned the epoxy option :P

Good enough for a 12x 3/4 hybrid ;)

13 Replies

6497 Views

Last post by jackssmirkingrevenge
Sun Nov 07, 2010 10:52 pm
CH1OP 270610

Last post by wyz2285
Replies: 2
by Minion » Sun Nov 07, 2010 2:33 pm

First post

Homemade Paintball Gun / Air Gun - CH1OP 270610
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Last post

what's the valve you use to fire? the trigger is very interesting

2 Replies

2779 Views

Last post by wyz2285
Sun Nov 07, 2010 5:09 pm
compact airsoft shotgun design.

Last post by Gun Freak
Replies: 11
by reedfe » Fri Nov 05, 2010 4:21 pm

First post

so iwas thinking i would remake my immense 5ft airsoft shotgun in to a more compact thing to run of my backpack tank. the backpack tank is about 5 ft...

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if you open a BV pilot it would be the same result as using one for a trigger.
Not even close. A schrader valve pilot could out perform a ball valve.

11 Replies

4603 Views

Last post by Gun Freak
Fri Nov 05, 2010 5:38 pm
second air gun, piston valve.

Last post by jackssmirkingrevenge
Replies: 11
by Sparrow » Tue Nov 02, 2010 1:27 pm

First post

My first cannon was just a ball valve water balloon launcher that wasn't very efficient.
However, I'm really happy with this thing, as you can screw...

Last post

I tried to keep the space behind the piston as small as possible as I wanted efficiency and not 100%power.

More efficiency means more power for the...

11 Replies

7295 Views

Last post by jackssmirkingrevenge
Thu Nov 04, 2010 2:18 pm
Solenoid Valve for T-Shirt Cannon

Last post by MrCrowley
Replies: 17
by greeneyehawk » Mon Jul 19, 2010 9:51 pm
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Hi everyone, I am part of team 254 for robotics, and we are undergoing a summer project that is building a t-shirt cannon. The toughest part of our...

Last post

The point of my previous post was no to second guess your range judgement but to add that they probably regged the pressure down in the cannon and/or...
17 Replies

17772 Views

Last post by MrCrowley
Wed Nov 03, 2010 2:48 am
mini pneumatic sniper(new pics)

Last post by wyz2285
Replies: 7
by wyz2285 » Mon Nov 01, 2010 1:25 pm

First post

This is my new air gun, and a first try to make a wood stock :P .As i was trying to make it small, i choused a coax design. The trigger is homemade,...

Last post

nice job especially for a first time! what is your piston? there is no piston :D as i said i use a diaphragm made os layers of tire :(

7 Replies

4463 Views

Last post by wyz2285
Tue Nov 02, 2010 3:59 pm
Solenoid Valve Questions!!

Last post by jackssmirkingrevenge
Replies: 19
by Davidvaini » Sun Oct 31, 2010 7:47 pm
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Quick question, has anyone here used these valves:

I am looking for something alternative to a sprinkler valve that is electrically controlled for...

Last post

Well... ball valve is too annoying to operate.

It can easily be made into a comfortable trigger , add a small spring at it will close when trigger...
19 Replies

7905 Views

Last post by jackssmirkingrevenge
Tue Nov 02, 2010 1:46 am
Compressing propane experiment completed

Last post by saefroch
Replies: 16
by saefroch » Fri Oct 29, 2010 6:49 am
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Well yesterday I hooked up a propane tank to my two-stage pump and decided to give it a go (in a well-ventilated area, wearing eye protection, with a...

Last post

Real encouraging there... every time I start to pump it, people think we have a gas leak.
16 Replies

4193 Views

Last post by saefroch
Mon Nov 01, 2010 7:50 pm
Auto .22 Airgun using JSM's Poppet Valve (Will it work?)

Last post by jackssmirkingrevenge
Replies: 53
by killerbanjo » Mon Jul 19, 2010 5:07 pm
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Hey guys, after looking at JSM's HPA Poppet Valve I instantly thought of this little idea, its pretty basic but just wanted to post it here for some...

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The Browning Airstar is a reasonably powerful springer that uses electric recocking and as you can see, it's nowhere near a decent rate of fire for...
53 Replies

31091 Views

Last post by jackssmirkingrevenge
Mon Nov 01, 2010 2:12 am
"Excalibur" QEV Cannon

Last post by jakethebeast
Replies: 6
by kjjohn » Sat Oct 30, 2010 5:37 pm

First post

This is my newest cannon, which I named the Excalibur . It is built around a 3/4 QEV. The chamber is about 30 of 2 aluminum pipe, and the barrel is 3...

Last post

nice job, with higher pressure and disk that is going to be beast! :D

6 Replies

4676 Views

Last post by jakethebeast
Sun Oct 31, 2010 3:51 am
Airgun Paintball

Last post by POLAND_SPUD
Replies: 3
by joce » Fri Oct 29, 2010 12:35 pm

First post

Video of the airgun:

I started riding this airgun video, plus I am not able to give multiple shots without opening and closing the record .....

Last post

well actually I didn't think of that... but yeah rag is probably right
though if you want a semi then you need a 3 way valve

mixing Enya with The...

3 Replies

858 Views

Last post by POLAND_SPUD
Fri Oct 29, 2010 2:57 pm
GGDT Supersonic Prediction?

Last post by Technician1002
Replies: 10
by saefroch » Tue Oct 26, 2010 7:35 pm

First post

This seems a bit optimistic to me... what do you think?

Last post

Thanks for the link. I'll play some with some conservation of energy theory and see what it would take to transfer the energy of compressed gas...

10 Replies

4697 Views

Last post by Technician1002
Thu Oct 28, 2010 3:30 pm
40mm Magazine fed prototype II.

Last post by Solar
Replies: 15
by Solar » Fri Oct 15, 2010 10:56 pm
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Trap doors for loading into magazine/receiver.
40mm x 121mm

Ejected Magazine

2.250 Wide. Velocity adjustment dial on back.

Comparison...

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Yes, it is illegal to have a firing pin behind 40mm tubing. I do not believe that is true with 37mm however. I will look for some sources on that...
15 Replies

8611 Views

Last post by Solar
Thu Oct 28, 2010 10:42 am
Vinyl valve hose

Last post by Gun Freak
Replies: 8
by Candyman206 » Mon Oct 25, 2010 11:42 pm

First post

I went to Lowes and picked up a couple feet of 1/4 vinyl hose. Will it be okay to use it on a sprinkler valve trigger for 100 psi? Oh yea its yhe...

Last post

The roll of hose should say the rating, if it is not on the hose itself. Check the label. These are things you should consider before hand, not after...

8 Replies

1867 Views

Last post by Gun Freak
Tue Oct 26, 2010 7:25 pm
Possible Safety Issue?

Last post by clemsonguy1125
Replies: 10
by clemsonguy1125 » Tue Oct 26, 2010 6:11 pm

First post

On my new golfball gun when I was gluing a fitting in it stopped about 1/4-3/8 inch from the end of the fitting. The two fittings are flush and Ive...

Last post

Well that is 770 psi more than I use and also that had large amounts up unsupported epoxy, also would putting the screws in it cause anymore danger...

10 Replies

2044 Views

Last post by clemsonguy1125
Tue Oct 26, 2010 7:13 pm
15MM ammo?

Last post by Jack_Hogg
Replies: 15
by Easter Egg » Fri Oct 22, 2010 11:52 am
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I wanted to ask you guys for ideas on what to shoot with a 15mm barrel, apart from potatoes? Batteries with some tape around them work great but i...

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Also it's very useful to make buckshot. I call it 10×10 buckshot. 10 bullets of 10mm in a 26mm copper pipe with 40 bars of pressure :twisted:

I...
15 Replies

6292 Views

Last post by Jack_Hogg
Mon Oct 25, 2010 10:01 am
My first cannon. Looking for any tips for improvement.

Last post by mlz3000
Replies: 19
by mlz3000 » Sat Oct 23, 2010 5:41 pm
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I build my first cannon last weekend, and I'm pretty happy with its performance, I was just anything I did that could be pretty easily improved upon...

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Alrighty!

Thanks you guys! This thread quickly jumped from noting that my chamber was not pressure rated to teaching me about C:B ratios and valves....
19 Replies

5853 Views

Last post by mlz3000
Mon Oct 25, 2010 12:51 am
My first Cannon

Last post by 03-Z
Replies: 5
by 03-Z » Sun Oct 24, 2010 9:21 am

First post

So I've had this cannon for over a year now and I am finally posting some pics. It is a little worn down but I just added a new bi-pod to it that is...

Last post

Nice gun, why did you post a picture showing the schrader cap on and off though :lol:
I really have no idea..... :lol: I just posted all the...

5 Replies

3681 Views

Last post by 03-Z
Sun Oct 24, 2010 4:20 pm
Highest pressure on a hand-powered pump?

Last post by Fnord
Replies: 8
by saefroch » Sat Oct 23, 2010 8:22 pm

First post

No, I don't mean to imply that there is a maximum pressure one can reach with a hand-powered pump. If there is one it's insane.

The question I have...

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The highest I've gotten with a homemade pump is 900 psi (single stage 1/2 copper tube). It took awhile though since I think I had a dead space...

8 Replies

4412 Views

Last post by Fnord
Sun Oct 24, 2010 1:49 pm

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