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

929506 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

453407 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

471689 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

639182 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

332698 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

80448 Views

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

Topics

Super-Simple-Sprinkler-Valve-Semi

Last post by Lockednloaded
Replies: 9
by Lockednloaded » Tue Mar 16, 2010 9:05 pm

First post

................................................... SSSVS ................................................
I'v had h=this sprinkler valve gun for...

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by too much damage, it is only too much for my little back yard, when i go out to a friends ranch, i'll be sure to take some destruction ammo. And...

9 Replies

4212 Views

Last post by Lockednloaded
Thu Mar 18, 2010 11:11 am
"Burst Disc" safety device?

Last post by twizi
Replies: 11
by boyntonstu » Wed Mar 17, 2010 11:09 am

First post

You build a steel pipe cannon and pressurize it to 1500 psi.

You mount a copper cap/burst disk in a position that blows away from you if it bursts....

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paintball burst disk for a 3000hpa tank or 4500 usally burst at 5000psi
they are made from brass and believe me u dont want to be near a 4500psi...

11 Replies

3241 Views

Last post by twizi
Wed Mar 17, 2010 7:40 pm
Need pics of your QEV's installed ?

Last post by spanerman
Replies: 7
by tatfree » Wed Mar 03, 2010 1:39 pm

First post

I have seen a lot of Animated videos on how these things work, but what I am looking for is actual QEV's and how they look installed on your rig and...

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there mine, made from parts i had laying around :)

7 Replies

2621 Views

Last post by spanerman
Wed Mar 17, 2010 8:35 am
Tee Piston Sniper Rifle

Last post by grock
Replies: 17
by Gun Freak » Sun Mar 14, 2010 8:40 pm
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What do you guys think of this design? I know there is a lot of dead space, but aside from that, I think it's pretty good... The think on the 3/4 Tee...

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You could try out this design, it works well for me, and looks pretty neat, no weird curves or nothing. could replace the stock T with a piston valve...
17 Replies

6507 Views

Last post by grock
Wed Mar 17, 2010 2:39 am
Fridge compressor (Another one)

Last post by theBOOM
Replies: 6
by theBOOM » Tue Mar 16, 2010 10:46 pm

First post

Anyway I finally got the fridge compressor from an old fridge that had broken down a while ago at my grandma's house. I did use the search function...

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Ohhh yeah I've seen those at the electronics section at homedepot.. I'll have a look around next time I go this week...

6 Replies

1791 Views

Last post by theBOOM
Tue Mar 16, 2010 11:42 pm
Copper pipe

Last post by Lockednloaded
Replies: 11
by Lockednloaded » Sun Mar 14, 2010 9:47 pm

First post

In the world of PVC, 3/4 fittings go into 1 1/4 pipe, 1 1/4 fittings fit in 2 pipe etc.. but i'm totally unfamiliar with copper. I was wondering,...

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Thanks jrrdw, tha was exactly what i was looking for.

11 Replies

3121 Views

Last post by Lockednloaded
Tue Mar 16, 2010 12:11 pm
Best fitting material when going into Aluminum ?

Last post by DR
Replies: 7
by tatfree » Mon Mar 15, 2010 10:35 pm

First post

Getting ready to tap a 1/2 thick surface of 6061 Aluminum for 3/4 NPT and was wanting to know what's the best material to use when dealing with...

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Assuming that your use of 3/4 NPT thread, is nothing more than to attach a 3/4 Modified Sprinkler Valve, then just use a 3/4 NPT PVC fittings (i.e....

7 Replies

2074 Views

Last post by DR
Tue Mar 16, 2010 1:51 am
Powered pilot valve for QEV ?

Last post by Slauma
Replies: 13
by tatfree » Fri Mar 05, 2010 12:45 am

First post

Wanting to have a firing push button (Momentary or on/off ) for my project that will be 24 + away from my Chamber, QEV and Pilot . Probably going to...

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Looks like I'll just buy a bunch of parts that I may or may not need ,to see what works and what doesn't and spend a lot more money on this project...

13 Replies

4280 Views

Last post by Slauma
Mon Mar 15, 2010 4:34 pm
Metal BB/Pellet Gun

Last post by clemsonguy1125
Replies: 12
by clemsonguy1125 » Sat Mar 13, 2010 6:43 pm

First post

This is my metal BB gun. Its firing mechanism is a single shot hammer valve.
Its chamber is 3/4 galvinised steel and the barrel is 1/4 brake line....

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Thanks, actually I have a stock leftover from another project so I just need to attach the trigger

12 Replies

6560 Views

Last post by clemsonguy1125
Mon Mar 15, 2010 3:41 pm
Simple Breech Locking Mechanism

Last post by c11man
Replies: 11
by boyntonstu » Sun Mar 14, 2010 2:21 pm

First post

Simple to make and to use.

No leaks or movement at 550 psi.

Last post

all valid points
on mine if this barrel was my only one then the compression fitting would serve as the coax conector and eliminate deadspace.
i...

11 Replies

2924 Views

Last post by c11man
Mon Mar 15, 2010 11:15 am
Which has better flow?

Last post by POLAND_SPUD
Replies: 34
by Gun Freak » Fri Mar 12, 2010 4:25 pm
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A 1/4 ball valve:

Or a 1/4 Blowgun:

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can this electric thing work as well yeah it can work as well as a blowgun or ball valve.. its flow might not be as good but at least it will open...
34 Replies

10424 Views

Last post by POLAND_SPUD
Mon Mar 15, 2010 7:29 am
6mmm carbine *UPDATE5*

Last post by chinnerz
Replies: 64
by Demon » Sat Feb 20, 2010 1:59 pm
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.43g airsoft at 520 fps

This is just the beggining, i will update when i achieved something significant on the build ...

*update1 and 2 on page 2*

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ahh ok, well good luck with it any ways, and i look forward to seeing more updates (and hopefully a video longer than 3 seconds )
64 Replies

16878 Views

Last post by chinnerz
Mon Mar 15, 2010 6:51 am
Spring loaded piston cannon question

Last post by chinnerz
Replies: 5
by Gun Freak » Sun Mar 14, 2010 11:07 am

First post

If a piston housed in a Tee is held foward by a spring and not only air pressure, then can it be filled by the chamber port or does it still have to...

Last post

hey Gunfreak,

just want to start by saying, no offense or anything.
but can you like draw up a quick sketch on paint, or gimp shop, or like...

5 Replies

2020 Views

Last post by chinnerz
Mon Mar 15, 2010 2:26 am
PVC bolt in flat plug for piston valve

Last post by c11man
Replies: 6
by c11man » Sun Mar 14, 2010 1:16 am

First post

since spring is just around the corner i can start using my favorite spudgun material again, PVC. this cannon would be a 2inch piston but built...

Last post

so i did some quick looking around and a 2inch sch 80 end cap has an overal length of 2 9/32 and a socket depth of 1.5inches, simple math and some...

6 Replies

1557 Views

Last post by c11man
Sun Mar 14, 2010 11:32 pm
Coaxial connector

Last post by Gun Freak
Replies: 16
by sp1ke » Sat Mar 06, 2010 8:12 pm
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what do people use for attaching a coaxial barrel to the end of their chamber? pics would be appriciated

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People say they've gone past 500 psi with it. But I would do the same thing if I were you. But as for asthetics, the tape is inside the chamber so...
16 Replies

6466 Views

Last post by Gun Freak
Sun Mar 14, 2010 2:48 pm
Semi Auto Airsoft Shotgun Videos

Last post by Gun Freak
Replies: 22
by Gun Freak » Sun Feb 28, 2010 11:59 am
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Here's a couple of videos of my new co-axial cannon shooting airsoft bbs.

Here's some pics of my dart target:

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I am trying to build a cartridge system... no luck so far. lol it's kinda hard... the Deus ex Machina tut. is way to complicated and not clear.
22 Replies

9047 Views

Last post by Gun Freak
Sun Mar 14, 2010 10:21 am
How many shots till empty using 70CI/4500 PSI Nitrogen ?

Last post by Hubb
Replies: 4
by tatfree » Sat Mar 13, 2010 10:20 pm

First post

I have been on Hubbs tank calculator and wanted to double check my figures on the forum here. Seems it's to good to be true to me.

Nitrogen...

Last post

I have no idea how the errors ended up like that. Thanks for pointing it out.

... Hope that formula is the right one? Ha! It is.

4 Replies

2152 Views

Last post by Hubb
Sun Mar 14, 2010 1:00 am
Distance the piston needs to move?

Last post by Metalcookie
Replies: 14
by Metalcookie » Wed Mar 10, 2010 6:33 pm

First post

Hello all, I'm new to the forums. Some might recognize me from the benheck forums.

Anyways, my attempts at building a piston valve failed, but I'm...

Last post

Guys thanks so much for your help! I built a working piston valve! :D I used spare parts from mah other cannon for most of the parts, and tested it...

14 Replies

3749 Views

Last post by Metalcookie
Sat Mar 13, 2010 9:21 pm
Please check my math Chamber to barrel ratio ?

Last post by Gippeto
Replies: 4
by tatfree » Fri Mar 12, 2010 11:27 pm

First post

So far I have read on the topics of barrel to chamber ration from Page 133 on this forum all the way down to page 50 and it seems mixed on what to...

Last post

You have to download ggdt and install it on your computer.

Follow the directions.

4 Replies

1486 Views

Last post by Gippeto
Sat Mar 13, 2010 2:16 am
Multi Shot Tee Piston Idea

Last post by Gun Freak
Replies: 2
by Gun Freak » Fri Mar 12, 2010 5:43 pm

First post

I had this idea for a self filling piston cannon, I want to know if this idea should work, or if it has been done before, and how many shots above 60...

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How do you think I whould reduce the pilot volume then? I drew it as small as possible. The coupling and bushing could be changed to a reducer, but...

2 Replies

1378 Views

Last post by Gun Freak
Fri Mar 12, 2010 8:08 pm
3/4" QEV's ?

Last post by tatfree
Replies: 3
by tatfree » Wed Mar 10, 2010 7:29 pm

First post

I am looking for a 3/4 QEV that is as compact as possible. I am shooting for a QEV that isn't as tall as the Deltrols from McMaster carr .

There...

Last post

thanks

3 Replies

1471 Views

Last post by tatfree
Fri Mar 12, 2010 8:03 pm
Air tank construction ( Only 1.5" ID ) ? Aluminum

Last post by tatfree
Replies: 2
by tatfree » Fri Mar 12, 2010 7:12 pm

First post

I am wanting to construct my air chamber using a 6061 Aluminum tube that will be .125 side Wall X 1.5 ID and 22 long .
I will be pushing 200 PSI Max...

Last post

Working pressure calculator...use yield strength and minimum safety factor of 3.

As to the ends...welding is a crap shoot from where I sit...of...

2 Replies

997 Views

Last post by tatfree
Fri Mar 12, 2010 7:36 pm
SolidWorks Simulation, Valve Flow

Last post by Moonbogg
Replies: 5
by velocity3x » Thu Mar 11, 2010 9:03 pm

First post

I posted this simulation from youtube because I thought it might be of some help when building a piston valve and deciding whether to construction a...

Last post

For the price of a full retail version of solidworks, you could build 50 cannons.

5 Replies

3188 Views

Last post by Moonbogg
Fri Mar 12, 2010 12:56 pm
Heard the 'crack'

Last post by inonickname
Replies: 3
by boyntonstu » Thu Mar 11, 2010 11:33 pm

First post

At 550 psi shooting a 10 gauge 44 gr plastic wad the Prochrono measured 1146 fps.

I heard a cracking sound that I never heard prior to that shot.

I...

Last post

I heard a similar crack when I fired a very thin nylon projectile from my 400 psi co-ax. The walls were less than a mm thick and the projectile was...

3 Replies

961 Views

Last post by inonickname
Fri Mar 12, 2010 3:25 am
coaxial bb gun on youtube

Last post by jackssmirkingrevenge
Replies: 18
by lemming124 » Wed Mar 03, 2010 6:33 am
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Hey everyone,
I've been a member of Spudfiles for a while now, but this is my first post. I was looking at co-axials on Youtube when I came across...

Last post

lol my posts are getting very predictable... sorry I couldn't resist to post it

Yup, it's a bit like me and epoxy... you can bleat about it all you...
18 Replies

5120 Views

Last post by jackssmirkingrevenge
Fri Mar 12, 2010 12:21 am

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