Pneumatic Cannons

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Announcements

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

1125718 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

552657 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

821449 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

967526 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...

Last post

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

375077 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

92475 Views

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

Topics

toilet valve?

Last post by THUNDERLORD
Replies: 7
by geardog32 » Thu Jul 02, 2009 12:56 pm

First post

so i managed to strike up a conversation with an employee at the hardware store today, he guessed that i was making a spud gun from my parts list....

Last post

IIRC, there was a news article where someone was stealing tons of the urinal valves and people were wondering why.
(DUHHH...For $$$$ somehow)....

7 Replies

2803 Views

Last post by THUNDERLORD
Sun Jul 05, 2009 5:59 pm
How to speed up a ball valve.

Last post by Technician1002
Replies: 10
by boyntonstu » Thu Jul 02, 2009 4:05 pm

First post

How to speed up a ball valve.

I have been out in my garage shop making a wood lever extension for my 1/2 ball valve.

I cut off the stop on the...

Last post

A fast enough piston and high COF is a winning combination.

F=ma is the universal relationship.

That is the bottom line. Period!

Projectile...

10 Replies

3574 Views

Last post by Technician1002
Sun Jul 05, 2009 2:56 pm
A no valve no chamber airgun idea:

Last post by pizlo
Replies: 3
by boyntonstu » Sun Jul 05, 2009 8:58 am

First post

I enjoy taking ideas from different arenas and combining them into a new invention:

Listed below are YouTube links that lead me to a slingshot...

Last post

This is a bad Idea from the start and has been discussed very recently. I was too harsh, but this idea will yield pitiful results, and a normal...

3 Replies

1510 Views

Last post by pizlo
Sun Jul 05, 2009 12:49 pm
Lost: Beautiful copper gun

Last post by al-xg
Replies: 11
by boyntonstu » Sat Jul 04, 2009 9:31 pm

First post

I saw a copper airgun on the net that was stunning and I would like to find it again.

Description:

The gun used a commercial QEV.

Barrel over...

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Yep 850psi regulated High Pressure Air, and yes that is getting a little close to the limit for a 3/4 rubber QEV piston. After the bit of copper pipe...

11 Replies

2924 Views

Last post by al-xg
Sun Jul 05, 2009 10:42 am
Soldered Pen Gun

Last post by jackssmirkingrevenge
Replies: 13
by jor2daje » Thu Jul 02, 2009 1:30 am

First post

After my first successful copper gun, I decided I would give brass a try after I found a source of cheap brass tubing. This is yet another copy of...

Last post

I think it is the undisputed champion of look-alike-pen-guns on the site.

...even if you say so yourself :roll: :D but seriously, I would tend to...

13 Replies

8123 Views

Last post by jackssmirkingrevenge
Sun Jul 05, 2009 5:25 am
air bag valve ????

Last post by cannon monkey
Replies: 14
by maggotman » Fri Jul 03, 2009 7:34 am

First post

my frend is throing out the air bag in his car and im wondering what type of valve it uses it is electricleay activated and wondering if it could be...

Last post

no valve it picks up on fast stops or impact and makes a small spark in a small chamber like thing that filled with special pills that react to the...

14 Replies

5169 Views

Last post by cannon monkey
Sat Jul 04, 2009 1:26 pm
Fridge or A/C compressor?

Last post by Technician1002
Replies: 7
by boyntonstu » Thu Jul 02, 2009 6:32 pm

First post

Does it make a difference about size unit the pump comes from?

Is A/C small window unit OK?

Last post

How do you see if a fridge has a compressor or not? or can you like hear it?

Personaly, I look in the back. If it has a thin cooling tube radiator...

7 Replies

3872 Views

Last post by Technician1002
Fri Jul 03, 2009 10:38 am
Portable Guns

Last post by inonickname
Replies: 8
by maverik94 » Wed Jul 01, 2009 8:35 pm

First post

Ok, I have been working on building a gun that is completely portable, in other words, I don't have to hook it up to a compressor or to a seperate...

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If you're going single shot in large bores then hammer valves get less practical. A QEV would be a better idea (spring so it could be filled from...

8 Replies

2278 Views

Last post by inonickname
Fri Jul 03, 2009 7:18 am
Valve type...Piston, Shuttle or QEV?

Last post by velocity3x
Replies: 12
by velocity3x » Wed Jul 01, 2009 8:56 pm

First post

It seems to me that people have different ideas on the nomenclature valves should carry. As a result, I'm confused as to what people look for in a...

Last post

Tech.....Even the mass of the air in the barrel and the flow resistance is enough to make them pop open.

Exactly....and pop open with explosive...

12 Replies

5160 Views

Last post by velocity3x
Thu Jul 02, 2009 1:02 pm
Chamber diameter vs barrel diameter?

Last post by Technician1002
Replies: 10
by boyntonstu » Wed Jul 01, 2009 1:59 pm

First post

Chamber diameter vs barrel diameter?

Is there a technical reason why the chamber diameter should be any larger than the barrel diameter?

It seems...

Last post

I was planning to keep everything volumetrically simular so it wont get heavier than what it is now but I'll try the shorter barrel first.

We lost...

10 Replies

5071 Views

Last post by Technician1002
Thu Jul 02, 2009 10:57 am
Maximum fridge - a/c compressor output

Last post by maggotman
Replies: 19
by MRR » Sun Jun 28, 2009 11:29 am
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Hi guys,
How the title may say, I'd like to know the maximum output of a fridge compressor (or air conditioner).

I know that you can go past 300...

Last post

when mine stoped at 1800psi its was becuse of that paper gasket failing if i could titen down the bolts it probaly could have give more
19 Replies

17454 Views

Last post by maggotman
Thu Jul 02, 2009 8:11 am
co2 mortar

Last post by colty-bear
Replies: 6
by colty-bear » Wed Jul 01, 2009 9:10 pm

First post

i had questions about this in the past then i tried it and it works beautiful.
shoots up to 400-450 yards.

the mortar/gun

the handle

the...

Last post

you could make a full auto
like you said have a spring loaded bolt with nail struck through and a mag when first cartridge comes in pull back bolt...

6 Replies

5989 Views

Last post by colty-bear
Wed Jul 01, 2009 10:55 pm
paintball assault rifle

Last post by colty-bear
Replies: 2
by colty-bear » Wed Jul 01, 2009 9:22 pm

First post

supressor built on end of barrel
shoots flat 50-60 ft
you can barely hear the gun at 50-70 psi

gun

the supressor

the valve

the fill valve...

Last post

yea i havE had some practice i put these 3 guns in at one time because i got a new digital camera
aiming isn't to hard i really lubed up the valve on...

2 Replies

2184 Views

Last post by colty-bear
Wed Jul 01, 2009 9:57 pm
Patch/ball or ball/patch?

Last post by Hotwired
Replies: 9
by boyntonstu » Wed Jul 01, 2009 9:12 am

First post

Patch/ball or ball/patch?

In a muzzle loader the patch goes in first.

If you breech load the same projectile, the patch goes in first as well....

Last post

Is there a breech loading video with patches?

Breechloading took off with self contained cartridges.

The patch/paper cartridge wadding wasn't...

9 Replies

2315 Views

Last post by Hotwired
Wed Jul 01, 2009 8:09 pm
Copper tubing burst (Type M)

Last post by Hotwired
Replies: 8
by boyntonstu » Wed Jul 01, 2009 11:51 am

First post

Copper tubing burst (Type M)

Have you knowledge of what happens with respect the shrapnel?

How does copper compare a PVC burst?

Last post

How did that go with your teacher?

Or even:

How did that go with your students?

:P

8 Replies

2147 Views

Last post by Hotwired
Wed Jul 01, 2009 7:39 pm
A Ball Valve friction question?

Last post by dudeman508
Replies: 2
by boyntonstu » Wed Jul 01, 2009 5:22 pm

First post

A Ball Valve friction question?

AFAIK There are 3 friction surfaces in a ball valve:

1> Ball to ball seal
2> Ball stem rod to handle.
3> Ball...

Last post

Is their a reason you need to use a ball valve?

2 Replies

1658 Views

Last post by dudeman508
Wed Jul 01, 2009 7:32 pm
semi-auto tennis-ball gun last question

Last post by THUNDERLORD
Replies: 1
by colty-bear » Wed Jul 01, 2009 6:02 pm

First post

the diagram

the trigger(push button release) and the air hose flow into the same brass tee. the flow of air will be constant through the brass...

Last post

I don't have too much time to ponder it.
Seems like the T should be turned 90 with the fill going into side and the push button on the back.
That...

1 Replies

2018 Views

Last post by THUNDERLORD
Wed Jul 01, 2009 7:25 pm
A way to fill it with a single stroke of a hand pump?

Last post by boyntonstu
Replies: 3
by boyntonstu » Wed Jul 01, 2009 3:56 pm

First post

Is there any way to fill an airgun it with a single stroke of a hand pump?

Lets calculate:

Atmospheric pressure at sea level is about 14.7 psi.

2...

Last post

Single Stroke Pneumatic systems have been around for a fair while in air rifles. Pretty consistent things if built well. However they do only...

3 Replies

4521 Views

Last post by boyntonstu
Wed Jul 01, 2009 4:53 pm
burst disk help

Last post by twizi
Replies: 7
by spudmanb3 » Tue Jun 30, 2009 2:58 pm

First post

I have only used burst disks in one of my cannons so I am fairly inexperienced in that area. I am making a burst disk bazooka that will fire shells ....

Last post

make a firing pin like i did with my co2 rifle

7 Replies

2481 Views

Last post by twizi
Wed Jul 01, 2009 11:50 am
sleving dwv pvc in steal?

Last post by Crna Legija
Replies: 18
by Crna Legija » Wed Jul 01, 2009 4:08 am
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if i sleeving dwv pvc in steal will it be strong enough to handle 500 psi?
i have a 3/4 in pvc pipe and a stainless steel wich fit in like just a...

Last post

i don't have a out side pipe threader on don't want to buy some aluminium pipe. i put epoxy on the hole pvc pipe and sleeved it already ill finish it...
18 Replies

3998 Views

Last post by Crna Legija
Wed Jul 01, 2009 8:52 am
schrader valve question

Last post by Crna Legija
Replies: 11
by Crna Legija » Tue Jun 30, 2009 9:26 am

First post

will a schrader valve open if wit out pushing the pin in a pump as a check valve? and how much pressure would it take? im making a 200-300 psi pump...

Last post

thanks i tried to cut one up and it didn't work ether
i only lose 70 or so psi and my pump already pumped to 400psi and i wont go passed 300 in my...

11 Replies

4761 Views

Last post by Crna Legija
Wed Jul 01, 2009 6:51 am
noob question

Last post by theBOOM
Replies: 3
by colty-bear » Tue Jun 30, 2009 7:44 pm

First post

ok i have seen people making piston cannons(coaxial) i know how to make a piston but i do not know how they work and where does the piston go in?
lol...

Last post

AWww you beat my to it far_cry :cry:

Boom :twisted:

3 Replies

1094 Views

Last post by theBOOM
Wed Jul 01, 2009 6:14 am
question

Last post by colty-bear
Replies: 32
by colty-bear » Wed Jun 24, 2009 4:42 pm
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i need a tennis ball barrel to go into a 2 inch porting mauler valve in one peice. will this work?

A picture

an item without a picture so i dont...

Last post

one last question the trigger(push button release) and the air hose flow into the same brass tee. the flow of air will be constant through the brass...
32 Replies

7237 Views

Last post by colty-bear
Wed Jul 01, 2009 12:12 am
Will it die?

Last post by inonickname
Replies: 10
by inonickname » Sat Jun 27, 2009 8:50 am

First post

I'm about to order one of these 1/4 Bellpro QEV's for $35 aud posted, which is about as good as I can get without going ebay international.

Clicky....

Last post

Ordered the 1/2 Bellpro QEV. He's getting back to me with an invoice for a money transfer.

The 1/4 may have been a slightly better idea. Less...

10 Replies

2080 Views

Last post by inonickname
Tue Jun 30, 2009 5:47 am
A crossbow pneumatic idea

Last post by Hawkeye
Replies: 21
by boyntonstu » Sun Jun 28, 2009 9:16 am
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I spoke with the company.

The guy said that a 70 pound pull would shoot a .22 pellet about 600 FPS.

The idea is simple; the bow forces a piston...

Last post

A fire piston diesels with the force that you can depress with one hand.
21 Replies

7146 Views

Last post by Hawkeye
Mon Jun 29, 2009 9:31 pm

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