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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

945111 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

62525 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

825376 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

196193 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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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...

Last post

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

221882 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

315893 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

5182943 Views

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

Topics

projectile trajectory calculator

Last post by Ragnarok
Replies: 15
by jagerbond » Mon Sep 28, 2009 3:47 pm
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Has anyone come across a calculator that can predict trajectory/distance with inputs such as; velocity, angle, drag coef., size, weight, etc......

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Can you also simulate a lift to the side, so you can shoot around corners?
Not at the time I did the simulation. However, it will now do that kind...
15 Replies

9701 Views

Last post by Ragnarok
Wed Sep 30, 2009 1:49 pm
Lubricant choices

Last post by spencetron
Replies: 19
by Moonbogg » Sat Aug 01, 2009 12:31 am
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I am searching for a lubricant to be used in lubing an aluminum hybrid piston with a viton o-ring. Many lubricants I found will not erode the o-ring...

Last post

For plastics: white lithium grease
For rubbers: light silicone oil
For metals: Militec-1 (synthetic weapons lube, love the stuff)
19 Replies

6407 Views

Last post by spencetron
Sat Sep 26, 2009 6:23 pm
PVC Pipe Dimensions

Last post by i-will
Replies: 2
by Northir » Tue Sep 22, 2009 10:46 pm

First post

Today i found this PDF file thought it would become useful to some of you it only lists dimensions for SCH 40 and 80 PVC but still it might help for...

Last post

thanks for the link to the pdf. i downloaded it straight to my psp. it's way better than carrying paper. saves trees.

2 Replies

1441 Views

Last post by i-will
Fri Sep 25, 2009 3:25 pm
interference sleeving a barrel....

Last post by jeepkahn
Replies: 30
by jeepkahn » Thu Sep 17, 2009 1:41 pm
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I'm getting ready to sleeve 56 of 1.5x.188 wall DOM steel(1.124 id) over 56 of 1 type k copper(1.125 od), for an interference fit of .001 +/- a...

Last post

AAAaaaaargh!!! Ok, we did a full inner and outer bath on the copper, warmed the steel slightly, and we got it sleeved 9 :(

I'm not sure if it's...
30 Replies

7111 Views

Last post by jeepkahn
Tue Sep 22, 2009 4:51 am
Get your pistons at Academy?

Last post by covey12
Replies: 9
by jmccalip » Thu Jul 09, 2009 12:19 am

First post

I was there today and I was walking through the boating section and I saw these: Bow rollers

They come in all shapes/sizes/weights/material,...

Last post

if they way that much, would it be possible to use what everyone does to make their airsoft pistons lighter, and drill tons of little holes through...

9 Replies

4421 Views

Last post by covey12
Thu Sep 17, 2009 5:19 pm
50mm HDPE or 54mm Hole saw?

Last post by jmadden91
Replies: 10
by tghhs » Wed Sep 09, 2009 1:45 am

First post

Well i've finally just found a place where i can get HDPE rod (AUS, Vic, profile plastics in bayswater) This is after an email and the 50mm rod comes...

Last post

Yeh perhaps sheet HDPE as opposed to 50mm rod

10 Replies

4091 Views

Last post by jmadden91
Fri Sep 11, 2009 9:02 pm
JB Weld Alternative

Last post by inonickname
Replies: 12
by PVC Arsenal 17 » Sat Aug 15, 2009 1:50 am

First post

I was walking though Sears the other day and I came across Loctite Weld .

The box claims that it is stonger than JB Weld, and has a quick set time...

Last post

JB has a tensile of over 3,900

Except that solder has a tensile strength of... OVAAAAAR NINEEE-THOUSANDDD!

I'd suspect the strength of epoxies/JB...

12 Replies

11708 Views

Last post by inonickname
Fri Sep 11, 2009 3:59 am
High pressure easy dart

Last post by Northir
Replies: 9
by wngovr » Fri Sep 04, 2009 11:26 pm

First post

I decided not to search the entire forum to see if this has already been posted, so if it has consider this an update.

My launcher has a blow gun...

Last post

thats a good idea with mine i could cut a notch in my sleeve to hold it, and ive got lots of neodymium magnets from old levels

9 Replies

4500 Views

Last post by Northir
Fri Sep 11, 2009 12:44 am
Little help needed

Last post by USGF
Replies: 10
by Moonbogg » Fri Aug 28, 2009 2:42 am

First post

I am building a contest entry, so details will be minimal, but the questions will still be valid. I test fired a cannon and it was using PTFE gaskets...

Last post

Moonbogg,

I gotta think you did not constrain the PTFE well enough. The stuff is close to inert and will withstand a lot of pressure but it has...

10 Replies

2915 Views

Last post by USGF
Thu Sep 10, 2009 3:27 am
Source of copper pipe

Last post by theBOOM
Replies: 8
by Spooky » Thu Sep 03, 2009 4:59 am

First post

I'm building a what I aim to be a compact coaxial and after some planning and mucking around with GGDT I decided to use a 10mm barrel.

I ordered...

Last post

Lol I dont care if its expensive cant be more than 10 or 15 dollars the meter... and I've checked and my homedepot nor lowes carries it .. only type...

8 Replies

3562 Views

Last post by theBOOM
Thu Sep 03, 2009 6:10 pm
sprikler pressure test

Last post by THUNDERLORD
Replies: 6
by c11man » Tue Sep 01, 2009 10:54 am

First post

while looking through some of my old research i found this

looks like more launchers could make use of a sprikler now. that is higher...

Last post

...what you guys think?...
:shock:
I get nervous with the sprinkler valve at over 125 psi!!!
Lately, I wear glasses, safety glasses, work gloves,...

6 Replies

2194 Views

Last post by THUNDERLORD
Wed Sep 02, 2009 7:20 pm
Help finding reducer

Last post by qwerty
Replies: 17
by qwerty » Thu Aug 27, 2009 2:31 pm
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For my upcoming project (a marble coaxail) i need a reducer from 1.5 inch to 3/4 inch but i cant find it anywhere. does anyone know were i could get...

Last post

read the whole thread from the start were i explain WHY i need it
its for a coaxail gun.

anyway its not outside inside its inside the 1.5 inch pipe...
17 Replies

6066 Views

Last post by qwerty
Sat Aug 29, 2009 2:00 am
PVC cement

Last post by c11man
Replies: 34
by YEAHADD16 » Mon Aug 24, 2009 10:24 am
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This has happened to me two too many times,

I buy cement, use it, then i store it in a decent temperature place (55-60 degrees F give or take) an...

Last post

on my 4inch fittings there is no gap either, infact i takes quite abit of force to get them together for a dryfit with no glue, its even a harder job...
34 Replies

14517 Views

Last post by c11man
Thu Aug 27, 2009 9:25 am
Urethane Rod for pistons.

Last post by THUNDERLORD
Replies: 28
by jeepkahn » Tue Aug 25, 2009 2:41 pm
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Ok, so about every 150 shots with the decimater, I'm havingto rebuild the piston because the forces subjected to a 1.5 piston at 400-700psi...

Last post

Also keep in mind that polymers like Nylon, Teflon, HDPE, UHMW, Acetal and others have a self lubricating property.

It means they are very low on...
28 Replies

6737 Views

Last post by THUNDERLORD
Wed Aug 26, 2009 4:01 pm
Two satge round

Last post by inonickname
Replies: 4
by queensland spudder » Sat Aug 22, 2009 7:41 pm

First post

I keep coming up with crazy ideas eh,

look what iamb think is a two stage round, the first stage will be a round firing out of a cannon , the second...

Last post

Bloody hell, breaking the rules with something so useless man? Sparkler rockets are rubbish..

The mass that the fuel adds (and takes away from the...

4 Replies

1907 Views

Last post by inonickname
Sat Aug 22, 2009 9:40 pm
Self stabilizing Silican tube rounds

Last post by queensland spudder
Replies: 12
by queensland spudder » Thu Aug 20, 2009 7:04 am

First post

hey i was wondering wether stabilizing a projectile with a tube fins design like this but only apply the same concept on silican tubes

do you...

Last post

i already know that but i want to see what works best in terms of stable flight, i could use the swing test to also determine what prototype is more...

12 Replies

3224 Views

Last post by queensland spudder
Sat Aug 22, 2009 4:13 pm
Hard to find bits in Australia!

Last post by absinthe
Replies: 16
by gaijinmike » Mon Aug 10, 2009 11:04 pm
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Hi all,

This is intended for Australians who are in the know. I'm having a lot of trouble finding the high pressure PN18 pipe in 4 and many other...

Last post

have you tried Reece or trade link? that where i get all my odd bod fittings (Reece was the only place that had a 15mm to 6mm reducing bush and i...
16 Replies

6890 Views

Last post by absinthe
Fri Aug 21, 2009 8:54 am
Airsoft/bb barrels

Last post by lozz08
Replies: 5
by lozz08 » Thu Aug 20, 2009 5:59 am

First post

Hi, I'm in need of a 6mm airsoft barrel, like a proper one, but I can't get it in my country (Australia). I need to find a way to have a barrel...

Last post

thanks a lot for the brakeline link man, you're a genius. It makes total sense. Does the 5/16 refer to the outside diameter? cos 5/16 icnh is almost...

5 Replies

1879 Views

Last post by lozz08
Thu Aug 20, 2009 6:19 pm
pvc primer help

Last post by Technician1002
Replies: 30
by roughboy » Mon Aug 17, 2009 5:44 am
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First post

It's late night and all the hardwares are close and i want to complete my gun but too bad im out of purple primer. the only thing i still have is pvc...

Last post

I promised photos of the primer job. I have them and they are posted below. There is no reason for sloppy primer stains on joints. This joint would...
30 Replies

10651 Views

Last post by Technician1002
Wed Aug 19, 2009 1:41 pm
How the heck do you rifle PVC pipe??

Last post by tomthebomb137
Replies: 32
by DasGestapo » Fri Apr 06, 2007 10:34 am
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recently i came across the rifled barrels for sale on spud tech, and i was wondering how i could do it myself. I have a decent lathe, but no clue as...

Last post

But not in use in the potato gun world, to our knowledge at least.
Either way, this is unessiary. lets be productive.
32 Replies

25229 Views

Last post by tomthebomb137
Wed Aug 19, 2009 1:00 pm
Great Burst Disc Material (for those interested)

Last post by noname
Replies: 2
by noname » Tue Aug 18, 2009 1:11 pm

First post

I was shooting last night with a friend, using my little burst disc mortar, and we ran out of burst disc material. However, there's a big pile of...

Last post

I'm not sure how well a tarp would burst out under pressure; they seem like the kind of material which instead would tear. I think they might be too...

2 Replies

1148 Views

Last post by noname
Tue Aug 18, 2009 11:11 pm
Metal Slurpee Straws!!!

Last post by jackssmirkingrevenge
Replies: 9
by THUNDERLORD » Fri Aug 14, 2009 11:24 pm

First post

So I was at line in 7-11 store and noticed .99 cent aluminum slurpee straws... (in a box near the register).

Second time I saw them I had to get...

Last post

There pretty small in diameter I'm not sure if you could get a 4.5mm barrel in there :?

You could go smaller, I've made 2.5 and 3mm penguns.

9 Replies

6844 Views

Last post by jackssmirkingrevenge
Mon Aug 17, 2009 1:43 am
new source for GlowInTheDark paint...

Last post by Technician1002
Replies: 3
by jeepkahn » Tue Aug 11, 2009 5:59 pm

First post

DupliColor now offers gitd paint in aerosol, it's called Illuminite ...

Offered at walmart, and most auto parts stores, it's about $18usd for 1...

Last post

Charging anything glow in the dark with a black light works far better then white light.

A pocket inverter and spiral CF Blacklight Bulb in a...

3 Replies

1382 Views

Last post by Technician1002
Tue Aug 11, 2009 6:55 pm
Ammo air plane

Last post by skyjive
Replies: 12
by jordzan » Sun Aug 09, 2009 9:51 am

First post

I am sure someones posted on it or tried it before ... sparked some ideas for me though. thought you guys might like it. could really get that plane...

Last post

Now just add a nose camera with a transmitter and some radio-controlled control surfaces, and you have your very own guided missile launcher. That...

12 Replies

5889 Views

Last post by skyjive
Tue Aug 11, 2009 2:46 pm
4" Double Layered ABS vs 4" NSF PVC

Last post by Hotwired
Replies: 2
by auxiliary » Sat Aug 01, 2009 2:53 pm

First post

What do you guys think would be safer for a pneumatic, a 6 foot long section of 4 diameter cellular core DWV ABS with couplings glued over the entire...

Last post

I wouldn't gamble on the integrity of a 6 foot long 4 inch diameter chamber.

The US is not a good place for the average consumer to get pressure...

2 Replies

1350 Views

Last post by Hotwired
Sat Aug 01, 2009 4:34 pm

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