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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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First post

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

649800 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Sketchup Model Library

Last post by mrfoo
Replies: 152
by dewey-1 » Tue Mar 24, 2009 12:12 pm
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First post

Over the last year I have made a lot of CAD drawings for
Pneumatic Launchers.

I have imported several of them into Sketchup format.
Here is the link...

Last post

Bollocks. Dewey put them out in the hope that, and I quote

some of you can make use of these!

There's absolutely nothing wrong with using them,...
152 Replies

384155 Views

Last post by mrfoo
Mon May 20, 2024 11:17 am
Solvent Welding Course Recommended For ALL

Last post by Technician1002
Replies: 46
by sgort87 » Fri Aug 04, 2006 8:18 pm
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First post

Originally posted by DR on the Spudtech forums:

IPEX Solvent Cements ONLINE Course can be found here:

It is recommended that you download and...

Last post

Your earlier post about just scoring the surface, has me wondering if that is why OATEY makes a brush tool that scores the inside of a fitting, and...
46 Replies

200135 Views

Last post by Technician1002
Thu Dec 02, 2010 5:04 pm

Topics

Stand for long cannon.

Last post by SpudFarm
Replies: 5
by SpudFarm » Wed Dec 08, 2010 4:40 pm

First post

Hello Spudfiles, I have wanted to build a stand for my hybrid since the first time I fired it. But it's hard to bite over something like that all by...

Last post

Who told you I would weld on the chamber?

And if I was going to do that it wouldnt matter as the endplates is welded in place and it holds up like a...

5 Replies

2416 Views

Last post by SpudFarm
Sat Dec 11, 2010 11:26 pm
When to expect BestShot contest results/poll??

Last post by Technician1002
Replies: 9
by ramses » Fri Dec 10, 2010 5:15 pm

First post

Title says all. It's only been 10 days, but I haven't heard anything from anyone. Chat is down or I'd ask there first.

Thanks.

Last post

If my part ships there, it will simply be listed as Engineering Sample Valve Core. No Commercial Value No hints will be provided it is not for...

9 Replies

2103 Views

Last post by Technician1002
Sat Dec 11, 2010 10:00 am
Accuracy of GGDT External Ballistics Calculator?

Last post by Technician1002
Replies: 9
by JDP12 » Sun Dec 05, 2010 9:24 pm

First post

Hey all, i've been fiddling with some plans for a paintball grenade launcher, and was using external ballistics calculator to mess around with...

Last post

In shooting t shirts in a competition, it was found adding ribbon tails to them helped the flight dynamics by preventing them from turning sideways...

9 Replies

4899 Views

Last post by Technician1002
Tue Dec 07, 2010 1:30 am
Help on how repeating barrel-sealing valved airguns work?

Last post by clemsonguy1125
Replies: 6
by jmez1996 » Tue Nov 30, 2010 8:15 am

First post

Hi everyone.
I have basic knowledge and understand how barrel-sealing piston valves work and how they can be implemented into airguns.
What i dont...

Last post

Heres mine, basic barrel sealer piloted by a hose gun chamber filled and has a spring behind the piston. Ask anything about it if you dont understand

6 Replies

2658 Views

Last post by clemsonguy1125
Tue Nov 30, 2010 5:53 pm
Semi Auto QDV Airgun

Last post by jackssmirkingrevenge
Replies: 23
by ByeBye » Sat Nov 27, 2010 5:44 pm
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This is just a pneumatic, but loading, firing and refilling is done in one stroke.

Charged:

Firing:

EDIT: I forgot to draw a spring in front of...

Last post

What pressure source are you planning on using for this?
23 Replies

21227 Views

Last post by jackssmirkingrevenge
Mon Nov 29, 2010 3:46 pm
New to Las Vegas

Last post by kickmeinthejunk
Replies: 7
by kickmeinthejunk » Sun Nov 28, 2010 6:09 am

First post

Hey all, im not really the chatty type so I really havent posted here before. Long story short here, I moved to Las Vegas and I really dont know...

Last post

Thanks for the input, I will check it out.

7 Replies

3363 Views

Last post by kickmeinthejunk
Sun Nov 28, 2010 7:56 pm
Automatic Piston Hybrid Design

Last post by POLAND_SPUD
Replies: 11
by kjjohn » Thu Nov 25, 2010 6:05 pm

First post

I was doing some research on free piston engines, when I got this idea for a piston hybrid. It functions like a two-stroke engine, except instead of...

Last post

oooh oooh how about this? Not a bad idea... the MOAR pumps the MOAR powah

11 Replies

5408 Views

Last post by POLAND_SPUD
Fri Nov 26, 2010 6:41 am
Inner workings for Oxbreath.

Last post by Mitchza89
Replies: 12
by Mitchza89 » Tue Nov 23, 2010 7:32 am

First post

Here mate,

I hope this helps. This is the inner working of the parts of this valve.

Cheers!

Last post

I had my air compressor hooked directly to the chamber. With constant pressure, the valve always stays closed. It's as simple as that :)

12 Replies

5508 Views

Last post by Mitchza89
Tue Nov 23, 2010 11:13 pm
why are bike pumps so s#1+ ?

Last post by Insomniac
Replies: 6
by lemming124 » Sat Nov 20, 2010 7:28 pm

First post

I've been looking at a number of homemade pumps on this forum

from what I've gathered the standard formula is shaft + piston + check valve. My...

Last post

If you're making your own pump, be very careful to get a high quality check valve. If it fails, the pump is suddenly going to turn into a pneumatic...

6 Replies

2215 Views

Last post by Insomniac
Sat Nov 20, 2010 9:41 pm
Best homemade alternative to SV ?

Last post by Technician1002
Replies: 22
by Selador » Thu Nov 18, 2010 3:18 pm
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Home made 1/2 piston valve.

Works great, when using a blowgun piloted sprinkler valve.

Doesn't work at all with just a blowgun. (No matter how...

Last post

Lapped simply mean ground together. The piston was too big to fit originally and with some fine grit in grease the original pistons were shoved in...
22 Replies

7796 Views

Last post by Technician1002
Fri Nov 19, 2010 4:09 pm
Safety First - How to make a cannon Failsafe

Last post by Gippeto
Replies: 29
by katypotaty » Sun Nov 14, 2010 8:51 am
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Hi,

I've just built a fairly powerful pneumatic cannon out of pressure rated schedule 40 pvc with schedule 80 fittings. The barrel is 6' of 1.5 and...

Last post

Decided he needed a safer hobby... tiddly winks perhaps?

But those little plastic discs could....knock the dust from your eyelash or some such....
29 Replies

7979 Views

Last post by Gippeto
Fri Nov 19, 2010 12:47 am
Power Full Half finished Gun.

Last post by jackssmirkingrevenge
Replies: 17
by Mpeddlesden » Thu Nov 18, 2010 12:30 am
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The last few Month's I've been making a New gun and for this first time today i fired it. i placed the rest against my shoulder and fired.
300psi...

Last post

It's next to the inappropriately dressed blonde tart.

My thoughts exactly :roll: but yes, on topic... how about a scope enhancer ?
17 Replies

6231 Views

Last post by jackssmirkingrevenge
Thu Nov 18, 2010 11:42 pm
semi automatic pneumatic airsoft design

Last post by POLAND_SPUD
Replies: 18
by burgerace69 » Tue Nov 16, 2010 1:32 pm
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First post

here is my idea that i have finally put into a gif animation. The goal is to have a portable gun that will give you multiple shots without reloading.

Last post

Of course you're free to disagree and prove all the naysayers wrong my making a working prototype yeap, I totally agree.... sorry about my previous...
18 Replies

10126 Views

Last post by POLAND_SPUD
Thu Nov 18, 2010 4:28 pm
Very simple bore-hawg.

Last post by Selador
Replies: 11
by Selador » Sun Nov 14, 2010 3:09 pm

First post

In my second build, I am working with 1/2 stuff.

When it came time to prepare the tee for the piston and barrel, I discovered that the stop inside...

Last post

The pressure in the pilot has to drop low enough to unbalance the piston. This pressure varies depending on the ratio. Friction and excess leakage...

11 Replies

6665 Views

Last post by Selador
Thu Nov 18, 2010 12:58 am
GGDT issues

Last post by ThornsofTime
Replies: 2
by ThornsofTime » Wed Nov 17, 2010 9:45 am

First post

Ok, so I recently had to buy a new computer and reinstall my life

Upon re downloading GGDT, I extracted the zip to my desktop, opened the main file,...

Last post

WORKS

ty oh god of GGDT

+2 internets

2 Replies

1577 Views

Last post by ThornsofTime
Wed Nov 17, 2010 11:42 am
Sabot idea

Last post by jackssmirkingrevenge
Replies: 13
by SpudFarm » Fri Nov 12, 2010 12:50 pm

First post

I have been a exchange student for two weeks and that gave me an idea. I saw some bolts that was treaded on the middle and smooth on the ends.

The...

Last post

You could probably make one on a decent drill press but fair enough, I can understand a fin fetish - APFSDS projectiles are undeniably sexy :)

13 Replies

5304 Views

Last post by jackssmirkingrevenge
Sun Nov 14, 2010 11:48 am
"valveless" cartridge concept

Last post by jackssmirkingrevenge
Replies: 145
by jackssmirkingrevenge » Tue Jul 13, 2010 8:48 am
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I've flirted with the idea of a valveless cartridge before, the performance benefits are obvious - zero opening time, instant full flow - however the...

Last post

I think his earlier test showed that even without a barrel the cartridge could eject itself.

That was with the hybrid cartridge, sadly with the...
145 Replies

51067 Views

Last post by jackssmirkingrevenge
Thu Nov 11, 2010 11:53 pm
Piston Hybrid

Last post by Selador
Replies: 34
by saefroch » Tue Mar 30, 2010 7:47 pm
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I've been thinking about constructing a piston hybrid (having experience with spray 'n' pray and pneumatic, thought i'd just jump a step), and at...

Last post

Guess I'll take this as a wake-up.

It probably wouldn't take long for someone to take sarcastic advice, and actually do something that gets themself...
34 Replies

13199 Views

Last post by Selador
Wed Nov 10, 2010 12:40 am
Heat and pressure ARE related

Last post by Selador
Replies: 25
by caspar97 » Tue Oct 12, 2010 3:04 pm
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According to so some scientific law, I think its Charles's Law, if pressure is increased, the temperature also rises.
Now, theoretically say there...

Last post

This is how a fire piston works.

People carry a fire piston with them when they go wilderness camping.

You place a piece of combustible material,...
25 Replies

7996 Views

Last post by Selador
Tue Nov 09, 2010 9:03 pm
Simple homemade pilot valve

Last post by Selador
Replies: 2
by Selador » Tue Nov 09, 2010 8:13 pm

First post

This morning an idea for a pilot valve occurred to me.

Based on a gate valve.

I spent a few hours designing and drawing it out.

After all that...

Last post

The problem I see with this valve is that it is unballanced and will be a !@#$^@ to push at pressures over 40 psi. At 120 psi, it would take 60...

2 Replies

2200 Views

Last post by Selador
Tue Nov 09, 2010 8:47 pm
air sprung nerf dart gun

Last post by cfb_rolley
Replies: 20
by cfb_rolley » Wed Nov 03, 2010 2:45 am
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so i thought of this today, and would like this theory to develop into a working gun, if it's feasible.

basically, in a nerf n-strike blaster, such...

Last post

that could work, people have changed the bolt on a longshot to a pump action on the front before using a kind of connecting plate setup. good news is...
20 Replies

13766 Views

Last post by cfb_rolley
Fri Nov 05, 2010 11:52 pm
how can i build a good semi auto piston valve

Last post by Ragnarok
Replies: 20
by qwert123 » Fri Nov 05, 2010 4:09 pm
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does anyone know a good way to make a semi auto piston valve. (not from a sprinkler valve) just to plink and scare squirls not kill the cute little...

Last post

and scare squirls not kill the cute little things

Take two lengths of wood, and place one on top of the other. Take one hinge, and affix it into...
20 Replies

6090 Views

Last post by Ragnarok
Fri Nov 05, 2010 6:09 pm
Where do I start

Last post by reedfe
Replies: 8
by KAA » Thu Nov 04, 2010 8:07 pm

First post

New guy here. I've been looking around here and there's a lot of info. Wanting to build my first cannon and was wondering where is a good starting...

Last post

my first cannon was a 1 inch pneumatic that was faithful untill i blew it up tuesday because of the non pressure rated parts (DWV). hehehe. i'll put...

8 Replies

2578 Views

Last post by reedfe
Fri Nov 05, 2010 4:04 pm
How do you mount a sight on your cannon?

Last post by Mountain Storm
Replies: 15
by Mountain Storm » Mon Nov 01, 2010 12:44 pm
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Hi all.

It didn't take me long to want a sight on my cannon. I happen to have a Tru Glo 4X so cobbled it on there with a strip of aluminum and some...

Last post

You know what is a right PITA? Trying to zero in a sight that is at a 45 degree orientation. I think I need to make a mount that is level to the...
15 Replies

6541 Views

Last post by Mountain Storm
Wed Nov 03, 2010 4:33 pm
Need Professional for a Jimmy John's sponsored event

Last post by Moonbogg
Replies: 29
by jayemel423 » Tue Oct 26, 2010 11:43 pm
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We need to launch sandwiches! Baby ones that is.. its an 8 sandwich cut into 3rds, about 2.5 wide x 3 tall, they are wrapped in paper and can't...

Last post

he isn't replying anymore. Lets stop steam rolling this guy with differing opinions and wait for some feedback on what HIS thoughts are. Just my two...
29 Replies

6085 Views

Last post by Moonbogg
Tue Nov 02, 2010 1:24 am

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