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

930630 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

453782 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

472083 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

639857 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

332865 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

80511 Views

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

Topics

Questions about electronic triggering of a sprinkler valve

Last post by potatoflinger
Replies: 9
by potatoflinger » Mon May 03, 2010 7:13 pm

First post

I came up with an idea for a remote triggered airsoft weapon, but I have a question about the electronics.

I want to use the electronics from an old...

Last post

Okay, to clear up some of the confusion, the plane was a piece of junk from the start and is probably quite a bit different from what you guys are...

9 Replies

4021 Views

Last post by potatoflinger
Mon May 10, 2010 7:23 pm
steel pipe

Last post by woodscout
Replies: 2
by woodscout » Mon May 10, 2010 10:36 am

First post

hi!

im little newbie, i have builded few combustions and one pneumatic, now im thinking to make a better and more powerful piston valve pneumatic....

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hmm i have founded it, it has a seam inside. i dont know the grade

2 Replies

1053 Views

Last post by woodscout
Mon May 10, 2010 12:54 pm
Slim Biggins - Sawn-Off QEV Launcher

Last post by MrCrowley
Replies: 55
by MrCrowley » Wed Apr 23, 2008 10:29 pm
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New Video :

I was getting bored over the holidays so I gave the SGP a little make over :)

The main setup:

Barrel: 1400mmx15mm paintball...

Last post

New video on the first page. This time it's dualed off against the V.A.L cannon.

You guys are probably getting used to seeing my garage clothes...
55 Replies

13260 Views

Last post by MrCrowley
Mon May 10, 2010 12:10 am
Stretching a O-ring

Last post by mark.f
Replies: 15
by clemsonguy1125 » Fri May 07, 2010 2:39 pm
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I finally found a somewhat large o-ring for my piston valve bushing. Its slightly smaller than the bush od which is good but I cant seem to get it to...

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Grab a fistful of raw beef, shove it into your mouth, and give that O-ring a taste of some man strength.
Haha your arms look like gecko's :D with...
15 Replies

3984 Views

Last post by mark.f
Sun May 09, 2010 10:52 am
Semi auto firing piston valve

Last post by velocity3x
Replies: 9
by Gun Freak » Sat May 08, 2010 9:11 pm

First post

Well I want to discuss why some piston valves can fir semi-automatically but some can't. My co-ax could fire semi-automatically with no problems...

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Comparing the performance of a small diameter Co-ax to a large diameter piston isn't the best comparison.
However, a large diameter piston valve can...

9 Replies

2315 Views

Last post by velocity3x
Sun May 09, 2010 10:41 am
Tee saftey question

Last post by Gun Freak
Replies: 34
by clemsonguy1125 » Fri May 07, 2010 8:26 pm
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Well since I can't find a good oring i've decided to get rid of the compact piston valve idea. I already have the seat tee assembley done and the...

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Yep. everything is all good.
34 Replies

6840 Views

Last post by Gun Freak
Sat May 08, 2010 9:32 pm
Will this work?

Last post by iknowmy3tables
Replies: 29
by Jack_Hogg » Thu May 06, 2010 1:59 am
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It will be made out of a solid peice of 30×60×150mm Aluminium
Tell me what you think

Last post

I think using a QEV or making a piston valve with real pipe fittings would better utilize the space in the stock, and then to get the overall shape...
29 Replies

8196 Views

Last post by iknowmy3tables
Sat May 08, 2010 5:06 pm
Converting Oxygen Cylinder

Last post by theBOOM
Replies: 23
by boyntonstu » Wed May 05, 2010 8:29 pm
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This is a converted 66 cu in M6 Aluminum cylinder.

It weighs about 2 pounds.

It was a challenge to tap a 1/2 pipe thread into it.

I twisted the...

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Uh, I think you got confused inferior means higher, or better, but anyway
Inferior:
1. Lower in place, rank, value, excellence, etc.; less...
23 Replies

6377 Views

Last post by theBOOM
Fri May 07, 2010 8:20 pm
New / first cannon / Fire extingisher / valve

Last post by Gaderelguitarist
Replies: 9
by cavemanaston » Wed May 05, 2010 1:17 pm

First post

Well this is my first post and my first cannon altho been constantly changing it.

I started with compression fittings and 2 2litre lemonade bottle...

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While an inline cannon configuration is generally more efficient (by minute differences), the weight of your chamber will be centered on the cannon...

9 Replies

3786 Views

Last post by Gaderelguitarist
Fri May 07, 2010 12:57 pm
Piston Face

Last post by clemsonguy1125
Replies: 20
by clemsonguy1125 » Wed May 05, 2010 8:10 pm
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For my new piston valve Ive been talking about for a while, in which the piston slides in the bush I had a couple of ideas about the piston face....

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Thats what I heard, the pistons cast in a plug so it should fit in the bushing nice, I was just worried there would be no air to push it back
20 Replies

4539 Views

Last post by clemsonguy1125
Thu May 06, 2010 6:35 pm
Reinforced washers?

Last post by saefroch
Replies: 16
by saefroch » Wed May 05, 2010 10:02 am
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I am still working on improving my pneumatic (will be posted on the showcase soon), which isn't quite complete because of one big issue. Operating it...

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Yeah, and I'm saying that will majorly constrict the flow on my design. I do thank you for the clarification though.
16 Replies

4465 Views

Last post by saefroch
Thu May 06, 2010 2:43 pm
Piston Valve problems 4" tee with 3"barrel.

Last post by Technician1002
Replies: 5
by AJAX » Thu May 06, 2010 12:10 am

First post

After the Completion of my first piston valve launcher i seemed to have hit a snag. everything seals and air is held correctly with no leaks. However...

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Take any material you are considering for a piston and hit it a few times with a hammer. Durable and high impact resistance is important. Soft and...

5 Replies

1271 Views

Last post by Technician1002
Thu May 06, 2010 1:04 am
2" Piston valve 1.5" porting

Last post by clemsonguy1125
Replies: 29
by Gun Freak » Tue May 04, 2010 4:04 pm
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Here is my valve I made yesterday, its for my golf ball gun. Whole thing will hopefully be done by tomorrow and I'll post it this weekend. Or maybe...

Last post

Funny enough my neighbor pulled oue of the woods behind our houses, wonder if there's anymore
29 Replies

6298 Views

Last post by clemsonguy1125
Wed May 05, 2010 7:17 pm
Coaxial trouble

Last post by MRR
Replies: 18
by Howzer » Mon May 03, 2010 5:22 pm
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I've made a coaxial launcher to launch nerf footballs for airsoft/paintball scenario games, but for some reason my piston won't release when i pull...

Last post

My best coax piston design at the moment looks like this.

It's light weight, doesn't need an equalization, no check valve, it's really fast and...
18 Replies

4922 Views

Last post by MRR
Wed May 05, 2010 2:03 pm
Brass Harpoon Gun

Last post by jackssmirkingrevenge
Replies: 26
by ONEWING » Fri Mar 26, 2010 4:36 am
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Heres a harpoon gun that was made quite some time ago, in fact it would have been posted on the old old spudtech forum 9 years ago. Back then coaxial...

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And another little arrow firing piston gun, the flights slide to the back when fired, it was crap.

lol I have those saved too! good stuff :)

Love...
26 Replies

13840 Views

Last post by jackssmirkingrevenge
Wed May 05, 2010 7:59 am
full auto Ball Valve design

Last post by kydavies
Replies: 39
by kydavies » Mon May 03, 2010 10:03 pm
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well, this is inspired by a spring trigger system and me accidently breaking off the stopper (part that only lets the ball Valve rotate 90°) on my ¼...

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well heres a though, if you have a system with lots of valvesyour going to loss pressure in between each on due to the fact the pressure will...
39 Replies

11028 Views

Last post by kydavies
Tue May 04, 2010 8:36 pm
2.5 inch QDV build

Last post by Technician1002
Replies: 55
by Technician1002 » Wed Oct 14, 2009 11:53 pm
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Instead of waiting until I could post this in the showcase, I thought I would post this work in progress here open for comments. This build will take...

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The build was on hold for the winter, spring gardening, tearing down a house, a move, etc.. Basically life. It should begin construction soon. In the...
55 Replies

19711 Views

Last post by Technician1002
Mon May 03, 2010 11:56 pm
Fridge compressor

Last post by POLAND_SPUD
Replies: 4
by metalmeltr » Sun May 02, 2010 8:13 am

First post

An idea for fridge compressor setup and lubrication recently crossed my mind. If you connect the inlet port of the compressor to an air tool...

Last post

yeah I have... damn I don't think I have pics of the complete setup

but you can see it here (you'll know where it is if you have a look on the...

4 Replies

1637 Views

Last post by POLAND_SPUD
Mon May 03, 2010 2:17 pm
compressed air "rocket"

Last post by jackssmirkingrevenge
Replies: 12
by jackssmirkingrevenge » Sat May 01, 2010 2:54 pm

First post

This popped up on youtube, interesting project but it could be improved in oh-so-many ways :) rocket inside the barrel with folding fins, longer...

Last post

I tried to tell him about SpudFiles, and how a modified valve would work better, and all that mumbo jumbo, but he brushed me off, and said that he...

12 Replies

4763 Views

Last post by jackssmirkingrevenge
Sun May 02, 2010 11:57 pm
Optimal C:B ratio as a function of pressure in pneumatics

Last post by btrettel
Replies: 17
by btrettel » Thu Apr 22, 2010 10:14 am
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I wrote a dimensionless low-speed pneumatic gun simulation recently. Why dimensionless? 1) Results are independent of size and can be scaled and 2)...

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I've found that the trend I noted earlier (that efficiency asymptotically approaches the maximum for high projectile masses) isn't true. The...
17 Replies

6937 Views

Last post by btrettel
Sun May 02, 2010 11:50 am
How many pounds can this hold?

Last post by Gun Freak
Replies: 10
by Marffy » Sat May 01, 2010 12:38 am

First post

I found this little pump in my room. I got it for my birthday one year along with a whole set of little building things that went with it. Since i've...

Last post

Double post much?

I wish people would stop doing that. We had a student doing temporary work in the lab recently that had a tendency to end...

10 Replies

3562 Views

Last post by Gun Freak
Sun May 02, 2010 8:34 am
6mm Coaxial - Part 2

Last post by MrCrowley
Replies: 20
by MrCrowley » Wed Apr 28, 2010 11:39 pm
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Nothing special here really. Just an upgrade on my previous 6mm coaxial . Added a 100cm long brass 6mm barrel, perfect for BBs. Painted black, was...

Last post

Problem is that I can't remove the copper shroud without messing up a lot of sh|t (in other words; it's epoxied). What I could do is drill through...
20 Replies

6481 Views

Last post by MrCrowley
Sun May 02, 2010 2:00 am
Potential energy question???

Last post by Ragnarok
Replies: 3
by boyntonstu » Sat May 01, 2010 12:17 pm

First post

Is there a formula that calculate the potential energy of compressed air?

From Wiki

Thus if 1.0 m3 of ambient air is very slowly compressed into a...

Last post

Thus if 1.0 m3 of ambient air is very slowly compressed into a 5-liter bottle at 200 bars (20 MPa)
I'm going to be pedantic and say that's not quite...

3 Replies

1297 Views

Last post by Ragnarok
Sat May 01, 2010 6:32 pm
I gotz a 35 bar pushbutton valve : )

Last post by Brian the brain
Replies: 47
by Brian the brain » Wed May 27, 2009 4:09 pm
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Like the title says,..
I built a push button valve, or hammer valve , that has greater flow than a blowgun, yet it can be pushed open by hand (...

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I have posted this on a public forum for all to see.

You can all copy anything I have ever posted, adapt it, flip it around and do whatever you...
47 Replies

18233 Views

Last post by Brian the brain
Sat May 01, 2010 2:07 am
The logic of a very tight projectile

Last post by Ragnarok
Replies: 19
by boyntonstu » Thu Apr 29, 2010 1:55 pm
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My experience with tight fitting cork based projectiles got me to thinking.

I noticed that a very tight projectile seemed more powerful than a...

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Is there a simulator that allows for different coefficients of friction at various points inside the barrel?
That's basically what I said about my...
19 Replies

5752 Views

Last post by Ragnarok
Fri Apr 30, 2010 3:57 pm

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