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...

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

1124912 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

552094 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

821102 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

966922 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

374833 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

92381 Views

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

Topics

Homemade QEV

Last post by sagthegreat
Replies: 33
by MalcomFrost » Fri Jun 20, 2008 5:19 am
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Seen this interesting vid on YouTube, might just give this a shot to see how well works. Anyone else made a setup like this before?

I know, the...

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cant this be made without a spring

srry for rebringing topic, i found my answer

dont be mad sorry
33 Replies

22062 Views

Last post by sagthegreat
Fri Mar 09, 2012 7:03 pm
Pneumatic Panzerschreck (Work In Progress)

Last post by kydavies
Replies: 5
by kydavies » Fri Mar 09, 2012 12:43 am

First post

It's been a while since I've been been on here and even longer since I've posted. But here is my latest project (still a work in progress), a...

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I took it out into the middle of nowhere and got some pretty decent results with chinese oranges and a plastic bag sabot. I would estimate about 200m...

5 Replies

2111 Views

Last post by kydavies
Fri Mar 09, 2012 6:14 pm
QEV question

Last post by jackssmirkingrevenge
Replies: 10
by sharpshooter11000 » Thu Mar 08, 2012 2:09 pm

First post

So I ordered a QEV for piloting the piston on my co-axial build but I've come up against some problems.
I won't be able to fill through the pilot...

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Go ahead and machine a simple synthetic sabot then, make it a close fit and you won't have to worry about equalisation holes.

Worked a treat for...

10 Replies

2799 Views

Last post by jackssmirkingrevenge
Fri Mar 09, 2012 2:59 am
Portable co2 pressure source

Last post by stuffbuilder
Replies: 2
by stuffbuilder » Thu Mar 08, 2012 11:05 pm

First post

Ok I'm trying to make a portable pressure tank backpack to fill my cannons, but I can't seem to find a good way to step the pressure coming out of a...

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That will work nicely. Thanks

2 Replies

1119 Views

Last post by stuffbuilder
Fri Mar 09, 2012 1:24 am
Flow Coefficient of Select Valves

Last post by Technician1002
Replies: 1
by Jimmy K » Tue Mar 06, 2012 7:24 pm

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Has anyone measured the flow coefficient of their piston valves? I would be very curious to see how much higher the cv of a piston valve is compared...

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I did some performance matching to see what range I was getting with mine.

It is not measuring the valve, but it did give a performance range to...

1 Replies

3537 Views

Last post by Technician1002
Tue Mar 06, 2012 7:47 pm
i need help making a pellet gun

Last post by Zeus
Replies: 10
by beastmode986 » Sun Mar 04, 2012 3:45 pm

First post

ok so i need help making a ball bearing gun or pellet gun i have made cloud bbmgs in the past along with air cannaons and a spud gun but i want to...

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Would an elephant be able to find water in a tree stump if the moon was full?

There's a lot of variables, download GGDT and try modelling it...

10 Replies

2289 Views

Last post by Zeus
Tue Mar 06, 2012 6:12 pm
Can anyone tell me how this works?

Last post by G-man
Replies: 42
by killerbanjo » Sun Jan 29, 2012 8:08 pm
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Well after trying to draw this out for a while im stumped :V I dont know if I am being silly or somthing but can somone else have a look for me?...

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My mistake, I was talking about a QDV in the size of the launcher this topic is about.
You're right, with such a big QDV the air pushes the piston,...
42 Replies

12071 Views

Last post by G-man
Tue Mar 06, 2012 5:43 pm
DWV

Last post by mattyzip77
Replies: 3
by cambot339 » Sun Mar 04, 2012 6:40 pm

First post

These fitting look somewhat suspect now that I have glued them on.
anyone care to assuage my doubts?

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The bell reducer is, as far as the others, ??????

3 Replies

1758 Views

Last post by mattyzip77
Mon Mar 05, 2012 9:27 pm
Hammer Valve Cartridge Concept?

Last post by jackssmirkingrevenge
Replies: 5
by cammyd32 » Sun Mar 04, 2012 3:35 pm

First post

So, for my next design I am in the need of an all inclusive cartridge, projectile, chamber, and filling port all rolled into one.
After...

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Ehhh...no link to the patent Jack??

Wrong patent ;)

This is the one you wanted:

The one you linked to is to the Brocock design, the above is...

5 Replies

3699 Views

Last post by jackssmirkingrevenge
Mon Mar 05, 2012 1:27 am
Simple Semi Automatic Concept

Last post by wyz2285
Replies: 22
by sagthegreat » Sat Mar 03, 2012 2:09 pm
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I saw this on the forums a few times but I want to know if this would get me a good amount of power, im looking for above 300FPS

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the speed at which the valve closes would be an issue because it would allow only a small volume of air to pass into the pilot, meaning that the...
22 Replies

7251 Views

Last post by wyz2285
Sun Mar 04, 2012 3:31 pm
Sprinkler Valve using another sprinkler Valve as a Pilot?

Last post by MrCrowley
Replies: 18
by NP Carling26 » Fri Mar 02, 2012 2:48 pm
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I am in the process of designing my next spud gun. I've learned a lot from my first one I built last summer and from these forums, but I am coming to...

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I think the valve you linked and D_Hall used is better than the typical sprinkler valves because the flow stem can be used to support the second...
18 Replies

10483 Views

Last post by MrCrowley
Sat Mar 03, 2012 11:00 pm
Frist cannon

Last post by jackssmirkingrevenge
Replies: 16
by ewok11 » Sat Feb 25, 2012 4:07 am
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here is my frist go a a cannon made from all the stuff i found lying around. build cost $0

its a little heavy but for the price its fine! it uses a...

Last post

downloaded GGDT last nite and filled it out and it tells me the the ball is going 157 meters a second is this gd? only 197m/s to i get to super...
16 Replies

6681 Views

Last post by jackssmirkingrevenge
Sat Mar 03, 2012 11:23 am
6mm airsoft sniper help

Last post by warhead052
Replies: 5
by brink01 » Thu Mar 01, 2012 10:28 pm

First post

Hey everyone, first off i'm new here, so please go easy on me :o

I'm looking at building a 6mm airsoft sniper but need a bit of help. i am wanting...

Last post

If you have a regulator, expansion chambers aren't needed unless you want more co2 in the gun.

5 Replies

1782 Views

Last post by warhead052
Fri Mar 02, 2012 8:12 pm
Paintball Cannon Help

Last post by Petitlu
Replies: 20
by Miles Hardman » Mon Dec 19, 2011 1:07 pm
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Hello,
Out of a strange turn of events I have my hands on an unregulated paintball tank and a 3000/4500psi air compressor. I was wishing to create a...

Last post

Sorry for digging out
I made a PAC with a bottle of paintball and shooting at 3000psi (200bar), here's the link:
20 Replies

5321 Views

Last post by Petitlu
Fri Mar 02, 2012 7:26 am
rotating hammer?

Last post by jackssmirkingrevenge
Replies: 10
by Goats spudz » Sat Feb 25, 2012 6:58 pm

How do you make one of those hammers like the ones on revolvers for building a hammer valve?

10 Replies

2172 Views

Last post by jackssmirkingrevenge
Mon Feb 27, 2012 2:19 am
Semi-auto .402 cal work in progress

Last post by jackssmirkingrevenge
Replies: 23
by JDP12 » Sun Feb 19, 2012 6:56 pm
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Here's another gun I'm working on while I'm at college: Using a 3 way valve with a slide valve. Right now it isn't magazine loading... I need some...

Last post

... or just avoid using BBs altogether ;)
23 Replies

8356 Views

Last post by jackssmirkingrevenge
Mon Feb 27, 2012 1:38 am
lubricating inside of barrel

Last post by Berkut
Replies: 15
by Berkut » Thu Feb 23, 2012 10:21 pm
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I've been working on a launcher on and off for a while, and I've finally got it finished and tested it today. Nerf vortex would not leave barrel at...

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I am using a vortex howler, which is a bit bigger than the barrel ID. My barrel is longer than the original design, which had a chamber approx. 14 in...
15 Replies

4634 Views

Last post by Berkut
Sun Feb 26, 2012 12:24 am
PAC WithOutLoss

Last post by Petitlu
Replies: 165
by Petitlu » Tue Jan 10, 2012 3:40 pm
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hello!
Here is a PAC coaxial Hammer!
No loss of air, not exhaust
Pressure: 40bar
Caliber: 12mm
joints are between the barrel and the breech
Block...

Last post

Well, in this drawing, the exhaust from the cylinder is technically lost.

you are absolutely right ! sorry

@Poland_spud :
thank you very much
I...
165 Replies

33428 Views

Last post by Petitlu
Sat Feb 25, 2012 2:46 am
whip up qev gun

Last post by jsefcik
Replies: 2
by urgle the danish cow » Sun Sep 18, 2011 12:06 pm

First post

this was just a quick whip up gun in order to test my qev which i got from ebay in mid july. i know its ghetto but its very strong.
1/2 inch abs...

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nice man. i want to get a qev , they look like so much fun

2 Replies

2323 Views

Last post by jsefcik
Thu Feb 23, 2012 6:36 pm
Brazing Cast Steel to Brass

Last post by sharpshooter11000
Replies: 8
by timmy999 » Thu Feb 23, 2012 11:47 am

First post

I've got a fire extingusher with a 30mm diameter thread and want to connect this to standard fittings. I started a topic about epoxy which allthough...

Last post

Ah, yeah I didn't notice that, my bad :oops:

8 Replies

2797 Views

Last post by sharpshooter11000
Thu Feb 23, 2012 5:30 pm
solenoid air valves

Last post by ocad
Replies: 8
by ocad » Fri Feb 17, 2012 9:19 pm

First post

Im new to this form but I looked around and have not seen any one using electronic solenoid valves. Ive made a copper ball valve gun but i have been...

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9mm if your bug has air suspension than you are right. You can get rely fast and real simple valves for short money. If no one else has seen this...

8 Replies

2269 Views

Last post by ocad
Wed Feb 22, 2012 10:09 pm
New spud is it worthy?

Last post by jackssmirkingrevenge
Replies: 14
by 9mmguy » Wed Feb 15, 2012 9:47 pm

First post

Tell me what you think!
i have been working on this for a bit now the valve body is brass and is a piston valve.have had it up to 300psi with my...

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Have made some all the way down to 10grams even drilled out the rear off them to cut the grams down

... and to keep them stable in flight ;)...

14 Replies

6100 Views

Last post by jackssmirkingrevenge
Wed Feb 22, 2012 12:48 am
Pneumatic AT4

Last post by Cpt Obvious
Replies: 21
by Cpt Obvious » Tue Feb 14, 2012 2:10 am
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So I had just finished finalizing the plans of a combustion type RPG for use in airsoft or paintball (with the metered shell idea given to me so well...

Last post

ah excuse me, i wasn't making a distinction between the battery powered valve and the mechanical one
21 Replies

14665 Views

Last post by Cpt Obvious
Wed Feb 22, 2012 12:36 am
HP qev and 3 way valve?

Last post by CooperJS
Replies: 2
by CooperJS » Tue Feb 21, 2012 4:27 am

First post

Hey guys
Are there any high pressure 3 way valves or qevs at least to stand up to 300psi or higher pressure?
Im looking to buy some for by air gun...

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Ok sweet, all i really need to get is a slide valve, i have got qev and i believe it is this one here:

And ill probably get this slide valve:...

2 Replies

1004 Views

Last post by CooperJS
Tue Feb 21, 2012 6:53 am
Angry Annie

Last post by blind909
Replies: 6
by blind909 » Sat Feb 18, 2012 8:54 pm

First post

Been out of the game for over a year or two now, but here's a nice new simple little cannon I've just made, propane tank for the resevoir, 1/4 inch...

Last post

Drilled and Tapped, then theres a 1/4 inch nipple, 90 degree elbow, nipple then Valve. And I've never attempted to weld, nor do I plan on it haha....

6 Replies

4300 Views

Last post by blind909
Mon Feb 20, 2012 1:32 am

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