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

1125305 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

552433 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

821326 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

967223 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

374980 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

92436 Views

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

Topics

2 valve metering vs hammer valve

Last post by iknowmy3tables
Replies: 13
by boyntonstu » Mon Nov 09, 2009 9:40 am

First post

Is there any advantage/benefit of using a valved firing chamber behind the piston valve that is pressurized from a larger chamber instead of using a...

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yes D_hall is right, having two valve is unessesary, having to operate two valves is something you find in a newbie gun, to use a working piston...

13 Replies

2114 Views

Last post by iknowmy3tables
Wed Nov 11, 2009 1:41 pm
constant flow full auto :)

Last post by jackssmirkingrevenge
Replies: 64
by jackssmirkingrevenge » Tue Jan 06, 2009 10:51 am
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The older members will remember my quest for a full auto valve from a constant air supply that sometimes were epic fail and other times came closebut...

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What's the rating on your valve? When the 200 pops on my RPG everyone around jumps. I can definitely see good potential for a strong shooter with a...
64 Replies

23584 Views

Last post by jackssmirkingrevenge
Wed Nov 11, 2009 1:28 am
1 inch QDV Drawings

Last post by c11man
Replies: 8
by dewey-1 » Thu Oct 29, 2009 2:36 pm

First post

I thought a separate thread was more appropriate than cluttering others.

Eventually this thread will contain a drawing for each component.

Right...

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i myself have made on matching your description(unposted) . its a 2in chamber and 1inch barrel, bothe 48in long. it works like a dream! well it works...

8 Replies

2123 Views

Last post by c11man
Wed Nov 11, 2009 12:40 am
Elevating scope mount

Last post by D_Hall
Replies: 15
by Procyon » Tue Nov 10, 2009 7:10 am
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Below are some pics for a thumb operated self-elevating scope mount. The range is from 0 to 30 degrees. There are notches cut out at 5-10-20-30...

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I've proposed a similar devise to be used in paintball. A user on another forum built a homemade adjustable drop forward and I thought it could be...
15 Replies

6011 Views

Last post by D_Hall
Wed Nov 11, 2009 12:09 am
WIP First Gun

Last post by urgle the danish cow
Replies: 10
by sl33k » Sun Nov 08, 2009 6:37 am

First post

Yea this is my first attempt at making a spudgun,

Specs:
20mm barrel at 40cm

1.25L Soda bottle with a bike valve

Going to add a sight, scope and...

Last post

how did you get the air from your bottle to the gun airtightly?

10 Replies

3485 Views

Last post by urgle the danish cow
Tue Nov 10, 2009 5:30 pm
Fully adjustable piston valve.

Last post by Procyon

by Procyon » Tue Nov 10, 2009 12:44 pm

What started out to be a simple tool to measure the depth from port to the back of the valve assembly ended up being a fully adjustable piston valve....

0 Replies

2297 Views

Last post by Procyon
Tue Nov 10, 2009 12:44 pm
Golf ball launcher bore size

Last post by Ragnarok
Replies: 9
by Solar » Fri Nov 06, 2009 1:51 pm

First post

So I read that the minimum regulation ball size is 1.68 for golf balls. What size bore is favored? Are there a lot of variance between brands,...

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Was 20 or steeper meaning 1:20 for the rate?
Sorry, I totally cocked up earlier.

I put a factor into the equation which I'd forgotten wasn't used...

9 Replies

15248 Views

Last post by Ragnarok
Mon Nov 09, 2009 6:39 pm
Quick Semi-Auto Question

Last post by Ragnarok
Replies: 3
by grock » Mon Nov 09, 2009 2:00 am

First post

I've seen dozens of posts about hammer valves, etc, but couldn't semi auto be achieved with a constant supply of air and a sprinkler valve/qev?
is...

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Horribly inefficient though, It's better to use something which closes the inlet on firing.
Suggestion on my part: Slide/Sleeve valve, at least if a...

3 Replies

948 Views

Last post by Ragnarok
Mon Nov 09, 2009 11:30 am
The backpack cannon

Last post by deathbyDWV
Replies: 12
by deathbyDWV » Sun Aug 02, 2009 12:05 pm

First post

Here is the cannon i compleated a few days ago. It will launch a rubber ball over 100 yards at 60 psi. I will soon take it up to 100 psi. I want to...

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I'm fairly sure that using co2 in pvc only makes it brittle if it is put in too fast or the liquid is sprayed in. I kind of turned away from the co2...

12 Replies

6206 Views

Last post by deathbyDWV
Sun Nov 08, 2009 10:21 pm
Behemoth, from 2006 (Image heavy)

Last post by cannonmaster
Replies: 9
by Ragnarok » Fri Oct 16, 2009 6:21 pm

First post

Firstly, what is Behemoth, and why is it only being posted now?

As for the what, I'm sure most of you are familiar with HEAL.
Behemoth was HEAL's...

Last post

ok thank's i was just wondering

9 Replies

4672 Views

Last post by cannonmaster
Sun Nov 08, 2009 7:11 pm
100 psi, a 2-1/2' nail, and and 1/2 index card

Last post by boyntonstu
Replies: 2
by boyntonstu » Sun Nov 08, 2009 12:52 pm

First post

Truly amazing what 100 psi nail dart can do in a 3/4 barrel.

BTW I developed a method to make a nail dart in under 1 minute.

This result can lend...

Last post

It's all about cross sectional area and density.

Simply reducing the diameter of your projectile from 0.75 to 0.5 means that it only needs less than...

2 Replies

982 Views

Last post by boyntonstu
Sun Nov 08, 2009 1:13 pm
Destruction of Yellow Pages

Last post by boyntonstu
Replies: 5
by boyntonstu » Thu Nov 05, 2009 6:08 pm

First post

This was surprising, a marble at 150 psi made it snow Yellow Pages.

Almost a perfect hole in the cover and the rebound at about 0.4 in, shot the...

Last post

I rolled a half of a 3x5 index card around a plumb bob and used hot glue to hold it.

The shot was at 100 psi and it completely penetrated the 1...

5 Replies

3117 Views

Last post by boyntonstu
Sun Nov 08, 2009 6:51 am
Schrader in Australia?

Last post by sl33k
Replies: 18
by flex180 » Sat Nov 07, 2009 2:53 am
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Does anyone have any idea where i can buy a schrader valve in australia? and also.....how do i install it? thanks heapps

Last post

I got mine from an old 20inch bike tire tube
18 Replies

6407 Views

Last post by sl33k
Sun Nov 08, 2009 6:38 am
brass over under UPDATE WITH DAMAGE

Last post by Mr.Sandman
Replies: 48
by c11man » Tue Oct 13, 2009 10:05 pm
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this is my new all metal mostly brass small bore over under. i postitioned the valve verticly instead of horizontaly mostly to improve the looks. the...

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yeah i know of the advantages of a dart but for pure accuracy i dont feel like it would be worthwhile Well i guess im caught up in my project that i...
48 Replies

12877 Views

Last post by Mr.Sandman
Sat Nov 07, 2009 7:12 pm
propane volume chamber orientation question

Last post by peashooter72
Replies: 4
by peashooter72 » Fri Nov 06, 2009 8:23 pm

First post

hi guys first time poster here. i have a question about a propane volume chamber for my mini spud gun. would i get better efficiency(more shots) if...

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would a setup like this be ok? horizontal is really easy to build and stream line. the blue in the pic is the liquid propane. i never thought of the...

4 Replies

2002 Views

Last post by peashooter72
Sat Nov 07, 2009 5:41 pm
piston valve

Last post by john bunsenburner
Replies: 5
by Marffy » Fri Nov 06, 2009 9:21 am

First post

hey, i'm a newbie when it comes to piston valves. can some one give me a diagram or explain how to make one of the smaller metal ones. the big piston...

Last post

Good god, a nipple for a tit...

And theres a dick on the roof in the morning and my fanny is rubbing against my legs... :roll:

5 Replies

1618 Views

Last post by john bunsenburner
Fri Nov 06, 2009 1:30 pm
Mega Coaxial Piston Vavled Potato to Orbit Launcher!

Last post by spudtyrrant
Replies: 5
by Braddubya » Thu Nov 05, 2009 4:56 pm

First post

Im planning to build my first piston valved potato (nature friendly) cannon. I have some experience with piston valves from my dart gun build which...

Last post

And that's why i try to make my answers vague and based on what i use not what is perfect, shall i get the wrath of Ragnarok :lol:

5 Replies

2277 Views

Last post by spudtyrrant
Fri Nov 06, 2009 9:42 am
First Pneumatic

Last post by CS
Replies: 5
by flex180 » Fri Nov 06, 2009 4:14 am

First post

I am looking to build my first pneumatic some time soon. what i am am thinking is this: a 40mm golf ball gun with a modded sprinkler valve. It will...

Last post

First go to GGDT's site , then click on 'design library'. Then Orbit WaterMaster, 1 .

With all that said, below is the list of input parameters...

5 Replies

1929 Views

Last post by CS
Fri Nov 06, 2009 7:14 am
1.5" Burst Disk Antenna Launcher

Last post by Lentamentalisk
Replies: 25
by Lentamentalisk » Tue Nov 03, 2009 3:29 am
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After only mild success with my previous attempt at a compact portable antenna launcher, I decided to skip the whole big heavy valve concept, and go...

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Well I went out and bought the 1.5 SCH80 threaded union, with an o-ring, only to find that my PVC cement had completely dried, in the nearly two...
25 Replies

8776 Views

Last post by Lentamentalisk
Thu Nov 05, 2009 2:03 am
hammer for a hammer valve

Last post by POLAND_SPUD
Replies: 16
by maverik94 » Tue Nov 03, 2009 2:08 pm
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Hey Y'all, I'm working on a .25 cal. multishot rifle. It's a PCP gun, and it uses a hammer valve as the one and only valve in the gun. Here's a...

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the same long Russian thread yeah... the same

it seems that everyone there has modded his gun or is planning to do so... well I wonder if spudguns...
16 Replies

21909 Views

Last post by POLAND_SPUD
Wed Nov 04, 2009 2:21 pm
how heavy is too heavy? Edit New problem

Last post by Technician1002
Replies: 21
by Jeeperforlife » Mon Nov 02, 2009 2:20 pm
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I am building my first piston cannon. It is a coaxil with 4 SCH40 chamber 5' long and 2 SCH40 6' long barrel. I will be piloting it with a modded 1...

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On a quick note, work quickly. The primer softens the surface of the PVC and it swells slightly. This can cause binding if you let it soak in the...
21 Replies

15275 Views

Last post by Technician1002
Wed Nov 04, 2009 1:01 am
Valve flow equation derivation

Last post by Technician1002
Replies: 12
by btrettel » Fri Oct 30, 2009 9:15 pm

First post

I suppose I won't get too many responses to this but I'll ask anyway...

For future versions of BAGS I want to go beyond the cookbook equation for...

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How low are the losses you are seeing? Do they require a flow efficiency greater than 100%?

No I am not going over 100% to model this valve. I'm...

12 Replies

2771 Views

Last post by Technician1002
Tue Nov 03, 2009 8:26 pm
Mini QDV pilot

Last post by Ragnarok
Replies: 24
by john bunsenburner » Sat Oct 31, 2009 7:03 am
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Well I am making a fairly small QDV as a pilot. I have thought of two ways of doing so, i have no pictures as of yet, nor do I have diagrams. I tried...

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How close of a deviation do you need?
In an ideal world, fractions of a metre per second.
As far as difference in projectile weight is concerned, I...
24 Replies

6082 Views

Last post by Ragnarok
Mon Nov 02, 2009 10:42 pm
The HPC10

Last post by kenbo0422
Replies: 23
by qwerty » Fri Oct 30, 2009 6:34 am
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At last ive finished my 22mm coax :P It took awhile waiting for all the parts but i finally made it. I need to fiddle with the piston a bit because...

Last post

Yes, you can turn PVC on a wood lathe. You would be better off having a clamped cutting tool, though, rather than a hand held tool. A clamp on a...
23 Replies

8502 Views

Last post by kenbo0422
Mon Nov 02, 2009 11:53 am
semi auto inflation

Last post by POLAND_SPUD
Replies: 16
by iknowmy3tables » Mon Oct 05, 2009 12:00 pm
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Here's a quick idea I thought of last night when I while I was studying. I made the design for a nerf gun that would use a regulated portable air...

Last post

I have to stress that the design is really something new...
most guns on here are piston valves, which have to be piloted.... that adds complexity...
16 Replies

5012 Views

Last post by POLAND_SPUD
Sun Nov 01, 2009 5:21 pm

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