Ammo & Materials

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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

629723 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
PVC Pipe Info

Last post by PCGUY

by PCGUY » Wed Oct 09, 2013 1:38 pm

PVC Pipe Info

PVC is used by plumbers, pool installers, and so on, and local building and construction regulations set the safety and materials...

0 Replies

49512 Views

Last post by PCGUY
Wed Oct 09, 2013 1:38 pm
The Offcial Machinist Thread: Revised 01/04/2014

Last post by Yexinss
Replies: 1097
by jrrdw » Tue Aug 02, 2011 5:54 am
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This is where members who need help getting machining done to their spudgun parts. There will be some guide lines and they are as follows:...

Last post

As my title described, 2k for modifying Daytona Recoil system to shoot Nerf darts. Full mechanical no wires no battery only HPA. If you can machine...
1097 Replies

730319 Views

Last post by Yexinss
Wed Aug 25, 2021 12:22 pm
Good Deals Thread

Last post by PaperNinja
Replies: 41
by clemsonguy1125 » Wed Aug 11, 2010 8:01 pm
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I keep seeing good deals on ebay for cheap parts that would be great for spud guns but not the kind I build. I figured it would be a good idea to...

Last post

$550 4500psi compressor
41 Replies

140472 Views

Last post by PaperNinja
Wed Dec 05, 2012 7:08 pm
Launcher Failure Analysis Log

Last post by SEAKING9006
Replies: 32
by Velocity » Sun Apr 15, 2007 11:28 am
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First post

The idea behind this thread was taken directly from a sticky on the Spudtech forums, seen at I, along with several other members, believe that this...

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I never made my inside out sleeve valve because I didn't know how to use o-ring, most important of all don't try gluing them in place, second if its...
32 Replies

171748 Views

Last post by SEAKING9006
Fri Jun 27, 2008 8:11 pm
Golf Ball Barrel FAQ

Last post by K8TOW
Replies: 34
by squeaks » Wed Jan 24, 2007 6:42 pm
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Okay, so one of the most asked about barrel is the golf ball barrel. Here are some frequently asked questions(and some unfrequent ones too).

Q: Why...

Last post

I use pvc plugs and caps
34 Replies

259924 Views

Last post by K8TOW
Thu Mar 16, 2023 5:22 am
Ammo Ideas

Last post by quinn whitsitt
Replies: 359
by PCGUY » Tue Apr 04, 2006 10:48 am
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First post

Ammo

I have put together a few ammo ideas for different size barrels. All pipe is PVC unless otherwise stated. If you think any ammo ideas should...

Last post

help sorry i typed to fast
359 Replies

5097916 Views

Last post by quinn whitsitt
Thu Feb 15, 2024 11:44 am

Topics

Help threading correctly...

Last post by ramses
Replies: 14
by saefroch » Sun Dec 12, 2010 3:21 pm

First post

I can tap threads just fine, but have a look at my sad attempt at making male threads to connect to the pump head (whose female threads are fine)......

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in the future, you can thread a nut onto the threads that exist up to the stop of the threads, and grasp that in a 3 or 6 jaw chuck. As you thread...

14 Replies

3591 Views

Last post by ramses
Mon Dec 13, 2010 11:26 am
Bearing Barrel

Last post by Lockednloaded
Replies: 8
by Lockednloaded » Sun Dec 05, 2010 1:38 pm

First post

I'm working on full auto, so I decided to get a more precise ammo than marbles. I would like to use either 1/2 or 3/8 bearings because they are the...

Last post

Thanks POLAND_SPUD, I'll probably work with the detent or try a blowback kind of thing

8 Replies

2110 Views

Last post by Lockednloaded
Sun Dec 05, 2010 3:38 pm
This is why I don't like using metal fittings into PVC

Last post by Selador
Replies: 10
by Selador » Fri Dec 03, 2010 3:25 pm

First post

This morning, I decided to make a breech for a 1/2 inch barrel, out of a 1/2 ball valve.

Got that made.

Installed it on the gun with the 1/2...

Last post

Selador sounds better than Oxbreath...

Ah !

Yes.

I didn't realize how much I would grow to dislike that moniker.

Thanks to PCGUY, for changing...

10 Replies

3858 Views

Last post by Selador
Sat Dec 04, 2010 4:49 pm
Questions about compression fittings

Last post by jrrdw
Replies: 4
by Gun Freak » Wed Dec 01, 2010 6:58 pm

First post

Here are a few Q's for anyone who can anser.
I want to make a copper piston valve using compression fittings, and not soldering. So...
1. Can the...

Last post

1) No
2) You can get pre-made reducers.

4 Replies

1988 Views

Last post by jrrdw
Wed Dec 01, 2010 9:18 pm
I feel like I can use this for something..

Last post by MadPiper2.0
Replies: 18
by MadPiper2.0 » Sun Nov 28, 2010 9:06 pm
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Okay so I was taking apart an old hand-held TV that ran off of like 6 AA's. I come across a circuit board with a metal cover that read CAUTION HIGH...

Last post

Sorry about the link, it isn't meant to be offensive, I can't link to google searches so this has to do.

Here is a similar website, but possibly a...
18 Replies

5445 Views

Last post by MadPiper2.0
Tue Nov 30, 2010 10:01 am
Jury-rigged Mini Lathe

Last post by jackssmirkingrevenge
Replies: 13
by Hubb » Wed Nov 24, 2010 8:27 am

First post

I've been passing interested in getting a lathe for some time, but for a number of reasons, haven't done so yet. But watching the videos of primitive...

Last post

Nurse, Nurse! He's out of bed again.

Anyway... check his avatar and tell me WTF is that? :wink:

Are you suggesting Hubb produces diamond plate...

13 Replies

4262 Views

Last post by jackssmirkingrevenge
Wed Nov 24, 2010 2:45 pm
unidirectional seals

Last post by Fnord
Replies: 13
by Moonbogg » Tue Nov 16, 2010 8:14 pm

First post

U-cup seals that are used for pneumatic cylinders seal in one direction. I thought about using them for a hybrid piston. I could fill the pilot and...

Last post

Do you need seals at all? Assuming your piston is just a tight fit, wouldn't the sudden pressure rise push the piston back anyway before it had time...

13 Replies

4333 Views

Last post by Fnord
Wed Nov 17, 2010 1:08 pm
barrel and sabot question

Last post by jrrdw
Replies: 3
by shimmer » Tue Nov 16, 2010 4:34 pm

First post

I'm wanting to make a launcher that would be able to fire 2 ice balls. I realize they have 2 pvc, but the ID is barely greater (2.067) than 2 inches...

Last post

Depends on how heavy duty the tripod really is. Most members that build turrents, build them custom for the cannon due to size and recoil. From what...

3 Replies

1526 Views

Last post by jrrdw
Tue Nov 16, 2010 5:10 pm
Limes at 4x?

Last post by Technician1002
Replies: 5
by Moonbogg » Sun Nov 14, 2010 8:39 pm

First post

I was wondering if anyone has experience with limes at these pressures? They work great at 2x, but would 4x destroy them? What kind of cheap ammo do...

Last post

If you want lemonade, shoot them through an expanded metal screen. :D

5 Replies

1838 Views

Last post by Technician1002
Mon Nov 15, 2010 12:28 pm
drill press tips

Last post by dewey-1
Replies: 24
by twizi » Tue Sep 21, 2010 6:01 pm
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First post

hey guys do you have any tips for drilling on the side of a pipe like the muzzle brake on this page
i tireid to but every time i try i would bend...

Last post

I finshed drilling 2 month and 4 hours ago so it dosent matter i than powder coated the aluminum and it looks great also alot of people dont...
24 Replies

9883 Views

Last post by dewey-1
Fri Nov 12, 2010 1:28 pm
High-Velocity Damage/Hybrid ROF Discussion

Last post by Technician1002
Replies: 31
by saefroch » Sat Nov 06, 2010 11:58 am
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Firing a 11/32 diameter low-carbon steel ball through cedar 1 x4 at about 750fps (says GGDT). Can anyone explain why there seems to be no clear hole...

Last post

Pre staged is much safer than pre mixed.

Use two pre staging tanks in proportion to the desired mix, one for air, one for fuel. When the volume of...
31 Replies

7376 Views

Last post by Technician1002
Fri Nov 12, 2010 11:29 am
Another rifled barrel discussion

Last post by jackssmirkingrevenge
Replies: 4
by ThornsofTime » Thu Nov 11, 2010 7:19 am

First post

I have a general question, but I come bearing gifts!!

First the gift. This is a calculator for determining barrel twist. It works much like ggdt and...

Last post

Some other questions to ask yourself would be:

- will I be firing over the sort of distances and require the level of accuracy that demands a rifled...

4 Replies

2091 Views

Last post by jackssmirkingrevenge
Thu Nov 11, 2010 11:50 pm
pvc low temp

Last post by Biopyro
Replies: 9
by metalmeltr » Tue Nov 09, 2010 7:02 pm

First post

how cold should i let it get before i quit using pvc for my cannons?
i live in ohio, very cold winters

Last post

At lower temperatures the pipe can actually handle higher pressure, but it's impact resistance is lower. In a pneumatic the force of a piston hitting...

9 Replies

2795 Views

Last post by Biopyro
Thu Nov 11, 2010 3:24 am
PVC thread retention question

Last post by ComradeBenedict
Replies: 7
by ComradeBenedict » Wed Nov 10, 2010 7:02 am

First post

Hey guys. I'm in the process of building a vortex cap BBMG with my friend. I was discussing our build with my dad, and he insists that threads...

Last post

A pop off valve would be a better choices for safety. If you feed it 200psi you would be lucky to get 90 in the chamber, so i really doubt it would...

7 Replies

2357 Views

Last post by ComradeBenedict
Wed Nov 10, 2010 7:39 pm
Modded Sprinkler Valve

Last post by mlz3000
Replies: 10
by jsparr » Sun Nov 07, 2010 12:23 am

First post

ok so i just finished modding my sprinkler valve to use a blowgun pilot valve. The sprinkler valve is being modded for my new 1.5 inch coaxial piston...

Last post

Well, you have the valve on the right way :wink: (I thought I messed up my first modded valve because it wouldn't seal, but it turned out I just had...

10 Replies

3568 Views

Last post by mlz3000
Mon Nov 08, 2010 10:37 pm
Massless fin designs (and sabots thereof)

Last post by saefroch
Replies: 2
by saefroch » Sun Oct 31, 2010 10:47 am

First post

So I have a mostly hypothetical question for the community; If you could build a theoretically massless fin system for a fin-stabilized projectile,...

Last post

Ummmmm okay, on second thought maybe I should have put this in the theories section... this post is to be theoretical, therefore what I mean by...

2 Replies

2068 Views

Last post by saefroch
Sun Oct 31, 2010 7:13 pm
Use of tap cartridges for piston valves

Last post by Zeus
Replies: 9
by POLAND_SPUD » Sun Oct 17, 2010 1:10 pm

First post

If you want to build a piston valve housed inside the T then the biggest problem is to find a fitting that'll house the piston and the piston...

Last post

You idea stealer you, I'm still yet to test the other option with these, better pull my finger out and get it posted.

Well observed though, it took...

9 Replies

3403 Views

Last post by Zeus
Wed Oct 27, 2010 5:43 pm
Finned Projectiles

Last post by jrrdw
Replies: 2
by Mountain Storm » Sun Oct 24, 2010 9:41 pm

First post

I have built 3 types of finned projectiles so far and at least one of them works as planned :wink:

For night launches I built an acrylic projectile...

Last post

Your the 1st member that I can remember to make 'wooden potato's'...nice! :P

I've built 50 or so Estae's model rockets and in doing so learned...

2 Replies

1918 Views

Last post by jrrdw
Mon Oct 25, 2010 7:46 am
Projectile specific gravity

Last post by Crna Legija
Replies: 67
by FighterAce » Sat Oct 16, 2010 8:59 am
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First post

I recently started casting plaster bullets. When I fire them, they almost fly sideways because I have a wrong twist rate on my rifling.
I found this...

Last post

The copper would probbly were out quickly if you use lead as ammo.
67 Replies

14833 Views

Last post by Crna Legija
Wed Oct 20, 2010 7:35 pm
Air rifling...

Last post by jackssmirkingrevenge
Replies: 21
by jackssmirkingrevenge » Thu Nov 06, 2008 4:06 pm
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... doesn't work :roll:

Last post

I still want to try some ways of stabilizing the slug... but rifling does not seem to matter.

Hollow tail/weighted nose, foster slug style.

lol...
21 Replies

7103 Views

Last post by jackssmirkingrevenge
Tue Oct 19, 2010 11:14 pm
Rifled Wooden Slugs: How to Make Them

Last post by Mountain Storm
Replies: 5
by Mountain Storm » Tue Oct 19, 2010 12:45 pm

First post

Hey all.

I thought I would share how to make some inexpensive ammo that seems to work pretty well from my initial tests.

This will require some...

Last post

Casting slugs. I like it. I can make them pretty fast with the usual assortment of tools though.

No need to cut rifling in them...it just makes...

5 Replies

3147 Views

Last post by Mountain Storm
Tue Oct 19, 2010 8:16 pm
Pengun piston

Last post by Technician1002
Replies: 20
by Gun Freak » Fri Oct 15, 2010 9:06 am
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I want to use a pencil eraser for a piston because it fits tightly but I don't know if it will hold up to 400 psi without the barrel becoming a...

Last post

Superglue is a brand name much like Pepsi is for a caffinated cola soft drink. There are other colas besides Pepsi, but the formulation varies a bit...
20 Replies

6025 Views

Last post by Technician1002
Mon Oct 18, 2010 11:24 pm
And it begins... again...

Last post by jackssmirkingrevenge
Replies: 37
by ThornsofTime » Wed Oct 13, 2010 12:44 am
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So, as im still fairly new to the forums and have been commenting on things... I guess its time to build a cannon.

This design has been in the back...

Last post

The most I'll do is cry, it will be the gods of efficiency that smite you!

If you want more noise, keep your pilot volume to a minimum to increase...
37 Replies

12932 Views

Last post by jackssmirkingrevenge
Sun Oct 17, 2010 11:44 pm
PVC Failures

Last post by c11man
Replies: 7
by HunterT » Sun Oct 17, 2010 1:09 am

First post

I found this article and it really demonstrates the how PVC fails. A must for any spud cannon maker.

Last post

The pipe is rated with a high safety factor.

i dont know any acual numbers but to be legal to sell the pipe has to have a pretty good saftey...

7 Replies

2370 Views

Last post by c11man
Sun Oct 17, 2010 8:55 pm
Jumbo dart

Last post by Benjg555
Replies: 7
by Benjg555 » Sat Oct 16, 2010 8:19 pm

First post

Hey you guys I just wipped up this quick dart for my cannons 2 barrel. I call it the jumbo dart :D.
It has 3 1/2 only has 2 in now but are I'm going...

Last post

Jhale. :D wooden pellet shall be made when I get it :)

Lozzo so just pretty much a spear? I was thinking of adding peices of rope and to make both...

7 Replies

2983 Views

Last post by Benjg555
Sun Oct 17, 2010 11:44 am

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