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

1125168 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

552274 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

821195 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

967095 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

374899 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

92412 Views

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

Topics

Heads Up ^ T ^

Last post by boyntonstu

by boyntonstu » Sun Apr 18, 2010 8:29 am

i was attempting to seal a 1/2 faucet washer to a 3/4 oak piston at 600 psi.

(The 1/2 faucet size washer OD is 3/4 )

I was using an 8-32 screw and...

0 Replies

2098 Views

Last post by boyntonstu
Sun Apr 18, 2010 8:29 am
Black iron + pneumatics

Last post by suburban spudgunner
Replies: 8
by Marffy » Thu Apr 15, 2010 7:47 pm

First post

How long does it take to have a black iron pipe rust out to a point that it will be unsafe? i will be using black iron pipe for my HPA t piston and...

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I've used black iron to build a (small-bore) gun.

I've been taking it to 150 psi for several years now (probably amounting to several thousand...

8 Replies

3174 Views

Last post by suburban spudgunner
Fri Apr 16, 2010 2:34 pm
Nerf/Other small projectile launcher planning. *update 1*

Last post by chinnerz
Replies: 32
by chinnerz » Tue Apr 13, 2010 8:41 am
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i will start making this once i confirm i can get the right sized barrel, but since i have no experience with nerf guns and making them i have...

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you can build a piston valve, but most piston valves also fill from the pilot, and you should have known that, so you should defiantly do more...
32 Replies

13761 Views

Last post by chinnerz
Fri Apr 16, 2010 12:54 am
Need better pilot valve

Last post by spudkpi
Replies: 36
by spudkpi » Mon Apr 12, 2010 8:34 pm
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SO here is my gun

...but I need a pilot valve or a way to modify the blowgun so that its works better at higher pressures. The blowgun keeps...

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THis thread turned loopy haha :lol:
36 Replies

11235 Views

Last post by spudkpi
Thu Apr 15, 2010 9:26 pm
Bolt Action Rifle run on Propane

Last post by Crna Legija
Replies: 10
by spudnutbutthut » Wed Apr 14, 2010 6:57 pm

First post

Hey everyone, I have made a pretty successful C02 bazooka that runs on propane, with a leveled out bottle of gas it takes about 2 minutes to get to...

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this should help

10 Replies

6119 Views

Last post by Crna Legija
Thu Apr 15, 2010 4:22 pm
Will this work?

Last post by jackssmirkingrevenge
Replies: 1
by Mooglebass » Wed Apr 14, 2010 5:38 pm

First post

I was given a K Rain sprinkler valve the other day. It is 1 inch, and I was wondering if it would work? To me it is diffrent than a water master...

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It should work perfectly, just make sure the flow control is cranked up ;)

1 Replies

983 Views

Last post by jackssmirkingrevenge
Wed Apr 14, 2010 6:12 pm
1st pneumatic rifle: idea and help with production

Last post by jackssmirkingrevenge
Replies: 16
by Russian_Kangaroo » Sat Apr 10, 2010 11:30 pm
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Hi everyone. Been following this website and what people have built for a little while but the urge to build one has gotten to strong so ive started...

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That is actually a pretty nifty design that i have seen while roaming the forums but i dont think i would be able to scale to the gun i want to make....
16 Replies

4418 Views

Last post by jackssmirkingrevenge
Wed Apr 14, 2010 10:26 am
More "T" piston discussion...

Last post by Technician1002
Replies: 2
by Marffy » Tue Apr 13, 2010 11:22 pm

First post

If i want to fill my HPA T piston valve by putting the fill valve in the chamber of the gun, not behind the piston, will i need a stronger spring to...

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My biggest problem with springs and piston valves is they tend to destroy the spring. I gave up on trying to use them long ago. I use a puff of air...

2 Replies

918 Views

Last post by Technician1002
Wed Apr 14, 2010 12:25 am
Your best performing piston according to GGDT?

Last post by Technician1002
Replies: 2
by boyntonstu » Tue Apr 13, 2010 8:20 pm

First post

What was your highest flow coefficient valve you built?

If higher than 50% please describe it.

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QDV in the short fat chamber is well above 50%. GGDT won't model a 1:1 OD diameter to seat ratio valve. Using in barrel accelleration data, the valve...

2 Replies

848 Views

Last post by Technician1002
Tue Apr 13, 2010 9:25 pm
Pneumatic/Hybrid/Combustion Fuel/Pressure Calculator

Last post by Demon
Replies: 3
by Bluetooth » Tue Apr 13, 2010 4:39 pm

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I'm getting tired of having to search around for different spreadsheets, webpages, calculators, or working equations by hand to figure out fuel mix...

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Its just an idea for the moment ...

I think it will be very hard to accuratly measure the air/fuel ratio on such a small volume ...

3 Replies

2394 Views

Last post by Demon
Tue Apr 13, 2010 4:56 pm
Co2 Tire Inflator for filling

Last post by Howzer
Replies: 10
by Howzer » Mon Apr 12, 2010 5:40 pm

First post

I tried searching the forums a bit, but no luck.

I've been planning on making a NERF football launcher(my first) for airsoft use, so I wanted...

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yeah, i've checked out the burst disk cartridge, i might try that for a later design, but i'd like to get my hand at constructing launchers first, so...

10 Replies

3261 Views

Last post by Howzer
Mon Apr 12, 2010 9:13 pm
Double Barreled Pneumatic Spud Gun

Last post by iknowmy3tables
Replies: 9
by ALPHA[GWP] » Sun Apr 11, 2010 1:13 pm

First post

Here's a prototype i might build , this is my first post here soooooo , any ideas would be great for this

Ps i can turn a normal valve pretty...

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yeah multi barrel setups tead to have this problem, you' might see some people make a volley barrels for bbs, but it's kinda pointless, if you want...

9 Replies

5162 Views

Last post by iknowmy3tables
Mon Apr 12, 2010 2:26 pm
I has 6mm carbine

Last post by Cosmic Muffin
Replies: 15
by Demon » Sun Apr 11, 2010 1:41 pm
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I am actually too much lazy to re-do all ...

edit :

woops, i just noticed a foot :oops:

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with a little refining, it could easily look very m93 rafficaish
just what i was thinking, all those hours on mw2 have me constantly thinking about...
15 Replies

7900 Views

Last post by Cosmic Muffin
Sun Apr 11, 2010 11:30 pm
Why I believe coaxials are opposite of what is best fps etc.

Last post by Gun Freak
Replies: 100
by boyntonstu » Fri Apr 09, 2010 11:08 am
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In a coaxial, the chamber is large in diameter than the barrel.

Larger diameters are weaker than small diameters when it comes to chamber design....

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Ok I say this thread be locked... the end.
*And 100th Post :D
100 Replies

27999 Views

Last post by Gun Freak
Sun Apr 11, 2010 8:39 pm
Hydraulic Relief Valve

Last post by MrCrowley
Replies: 7
by MrCrowley » Sat Apr 03, 2010 8:24 pm

First post

Bought this for $10 the other day, think it would make a really good high pressure valve but was looking for some input of what type of valve to go...

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Still need to get a high pressure tank and gauge and then my fridgey is complete. Got some hydraulic hoses for $20 the other day.

7 Replies

3773 Views

Last post by MrCrowley
Sun Apr 11, 2010 5:44 pm
compacting a tee piston

Last post by Lockednloaded
Replies: 29
by Lockednloaded » Sun Mar 21, 2010 8:44 pm
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I'm planning a build that will either use a 3/4 qev, or a piston housed inside a 1 1/4 tee. I have found no local suppliers for qevs, and i already...

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well, just a little further on R&D. The only thing that has no plan yet is the piston. For sealing the back plug, i found this great sealing tape...
29 Replies

7090 Views

Last post by Lockednloaded
Sun Apr 11, 2010 4:33 pm
[Solved]How many times can my CO2 cylinder charge my cannon?

Last post by Bluetooth
Replies: 4
by Bluetooth » Sun Apr 11, 2010 1:26 pm

First post

I was wondering if anyone new the theory, or even more useful, some equations, to figure out how many times a CO2 cylinder with a defined amount of...

Last post

The Hubb Library has EXATCLY what you are looking for...
Near the bottom of this page.

That is EXACTLY what I was looking for! Thank you! I can...

4 Replies

3191 Views

Last post by Bluetooth
Sun Apr 11, 2010 4:10 pm
The 1/4" destroyer

Last post by spudkpi
Replies: 16
by spudkpi » Thu Apr 08, 2010 9:43 pm
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Well All I have really for you to see is the video because I don't reall have any pics of it yet. It is regulated co2 and without a barrel already...

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Sorry for the triple post but I will try spring loading the qev.... I have to machine an epoxy part on the lathe so that I can go from the 3/8...
16 Replies

6414 Views

Last post by spudkpi
Sun Apr 11, 2010 2:53 pm
20 oz. CO2 Tank Not Completely Filling?

Last post by Bluetooth
Replies: 6
by spudkilla224 » Fri Apr 02, 2010 1:05 pm

First post

Hello everyone, I was having Dick's Sporting Goods Fill My 20 Oz. CO2 paintball tank yesterday and when the person was filling the tank he said it...

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The only thing I could think of is that his main tank was almost out and equalized with yours at 7-8 PSI, but that's not likely and I think he'd...

6 Replies

4170 Views

Last post by Bluetooth
Sun Apr 11, 2010 1:57 pm
Found a variety of 2" IBC valves! What to do with them

Last post by jackssmirkingrevenge
Replies: 5
by Mauk » Wed Apr 07, 2010 2:06 pm

First post

Hello, spudders!
I was exploring my dads old garage and found a box full off different 2 inch IBC valves and some pipes, and the first thing that...

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I would not trust these at much pressure, IBCs are not pressurised containers and those holding liquids which generate pressure such as volative...

5 Replies

1852 Views

Last post by jackssmirkingrevenge
Sun Apr 11, 2010 1:30 pm
O-ring grooves and floating o-rings

Last post by Gun Freak
Replies: 12
by Gun Freak » Sat Apr 10, 2010 7:41 pm

First post

I always hear people talking about ways to make o ring grooves like drill in a vice and stuff like that, and for my upcoming project, I am going to...

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Ok thanks tech, I saw that thread, but not the pictures. I never scrolled down. :oops: I don't have a drill press though... and one more thing. How...

12 Replies

6861 Views

Last post by Gun Freak
Sun Apr 11, 2010 12:43 pm
M1A1 Bazooka

Last post by metalmeltr
Replies: 33
by biged » Mon Sep 08, 2008 5:43 am
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A replica of the WW2 M1A1 Bazooka .

Valve: 2 inch serviceable piston
Porting: 1.5
Barrel: 2.625
Construction: Steel
Piloting: .25 QEV...

Last post

That is pretty cool that the exasust pipe can be used in the same application as 2.5 sdr 21, I think that would be a good alternalive for the sake of...
33 Replies

26657 Views

Last post by metalmeltr
Sun Apr 11, 2010 9:36 am
modding a de-solder pump

Last post by Gun Freak
Replies: 6
by chinnerz » Mon Apr 05, 2010 1:28 am

First post

some of you make have read this , i discovered that there was a product which could be modded to make a powerful hammer.

also in that topic i said i...

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Can somebody please explain to me how a hammer valve can be made semi auto or give me a link to an example? Thanks :oops: lol

6 Replies

2470 Views

Last post by Gun Freak
Sat Apr 10, 2010 5:58 pm
~$5 qev and 3way valve made from a nerf gun

Last post by Gun Freak
Replies: 8
by iknowmy3tables » Tue Apr 06, 2010 4:57 pm

First post

So I've been experimenting with my secretstrike nerf gun, and if you don't know what it is, it's a $4 pocket sized pneumatic nerf gun that looks like...

Last post

I think the pressures you are using in that thing is fine for firing nerf darts... I found that the best pressure for firing nerf darts was about...

8 Replies

6096 Views

Last post by Gun Freak
Sat Apr 10, 2010 2:13 pm
ggdt run-time error 5

Last post by Crna Legija
Replies: 12
by Crna Legija » Sat Apr 10, 2010 8:46 am

First post

i got ggdt to open on vista thanks to the other posts and now get a run-time error 5 90% of the time i use it i have vista home and ggdt v4.6

Last post

my sealing face is a bit bigger than my piston(about 1mm on each side) that i did not acount for so your right

but still if i set my gun up in...

12 Replies

1888 Views

Last post by Crna Legija
Sat Apr 10, 2010 10:38 am

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