Combustion Cannons

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SpudFiles Potato Gun Commercial

Last post by quinn whitsitt
Replies: 15
by PCGUY » Tue Oct 29, 2013 10:54 pm
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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...

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thank you for creating this website is there anything i can do to help
15 Replies

629112 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Sparker Reference Guide

Last post by quinn whitsitt
Replies: 45
by rcman50166 » Tue Feb 05, 2008 4:19 pm
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First post

OK. Everyone always seems to know more than me in almost every topic on this site. But this is my domain! High voltage electricity is what i know...

Last post

great job how can i help the fourms
45 Replies

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Last post by quinn whitsitt
Fri Mar 01, 2024 10:52 am

Topics

authentic mortar

Last post by battlelava
Replies: 18
by battlelava » Wed Feb 29, 2012 8:12 pm
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I've been looking at a replica mortar system but I have no idea were to start with a drop fire system. Any ideas

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Found a 2 slide in Female threaded output and a plug :O so im going to make it a mortar/booby trap for airsoft workin out some numbers in HGDT now...
18 Replies

6709 Views

Last post by battlelava
Sun Apr 15, 2012 3:42 pm
My new fire-extinguisher body spud cannon!

Last post by jackssmirkingrevenge
Replies: 1
by bmaher6 » Tue Apr 10, 2012 3:19 pm

First post

Hi guys this is a short video of my new spud cannon, enjoy!

Last post

Well it works :)

Pictures/details of the launcher? Seems a shame to waste a fire extinguisher on a relatively low pressure combustion.

1 Replies

2091 Views

Last post by jackssmirkingrevenge
Tue Apr 10, 2012 3:21 pm
Breech loading gun mounted on turret

Last post by Runningman5
Replies: 4
by Runningman5 » Thu Apr 05, 2012 2:40 pm

First post

Something I built a while back as part of a project to convert a golf cart into a tank.

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Yeah, it was a lemon. As far as ammo; I have created a reusable PVC round for messing around with. I haven't got anything that would be safe for...

4 Replies

2400 Views

Last post by Runningman5
Fri Apr 06, 2012 6:27 pm
Spud gun. Help me please

Last post by jimmy101
Replies: 5
by beastmode986 » Thu Apr 05, 2012 4:23 pm

First post

Ok I recently made a spud gun.just a casual one it has a 3 chamber and 2 inch barrel the barrel is about 3 ft long maybe a little longer. 4 ft max...

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4% (by volume) for propane in air at 1X. (Not 5%)

Search the spud wiki for syringe and start with a syringe based meter. It'll cost a tiny fraction...

5 Replies

2553 Views

Last post by jimmy101
Fri Apr 06, 2012 6:03 pm
Latest Combustion Project

Last post by Brian the brain
Replies: 1
by DEATHSTAR » Thu Apr 05, 2012 11:33 am

First post

Hello all,
Just wanted to run my latest Combustion project specs by you guys for any feedback/
advice (That I greatly appreciate). :

-I have a three...

Last post

can't wait to see it.
Oak and brass..just my thing!!

1 Replies

1486 Views

Last post by Brian the brain
Thu Apr 05, 2012 1:31 pm
burst disc material

Last post by Moonbogg
Replies: 5
by Daviator » Sat Mar 17, 2012 12:32 am

First post

my current cannon doesnt use a burst disc system . the ball just sits in the barrel and is held in place by a ball catcher i made. i want to refit...

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I use plastic drawer liner from home depot. A good sized roll is like 5 bucks and it will make hundreds of discs. A single sheet is good for about...

5 Replies

2870 Views

Last post by Moonbogg
Sat Mar 17, 2012 4:29 am
Home defence spudgun

Last post by RamboNucke
Replies: 19
by RamboNucke » Thu Mar 08, 2012 6:08 am
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Hello everyone. I'm Rambo(the crappy autocombustion guy). For a while I concentrated instead of exotic high tech spud guns, on ones with real value ....

Last post

Yea hybrids are bad ass. They are powerful and can even shoot in space. You inspired me to make a fun little indoor shooter(crappy combustion trough...
19 Replies

6352 Views

Last post by RamboNucke
Fri Mar 09, 2012 12:53 pm
Combustion performance help

Last post by MrCrowley
Replies: 14
by Bokonon » Thu Mar 08, 2012 11:05 pm

First post

So Im from the states and live on a small island in the middle of the Taiwan straight where it is illegal to own or possess a firearm. I made a spud...

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I would disagree, your larger hybrids are made from standard fittings and with a proper sabot loaded with buckshot at close (below 50 metres) range...

14 Replies

3270 Views

Last post by MrCrowley
Fri Mar 09, 2012 2:57 am
new to spud guns some help or advice please

Last post by Fnord
Replies: 15
by Daviator » Sun Mar 04, 2012 11:29 pm
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i built my first gun to shoot golf balls, it worked pretty good. but now im looking to shoot faster and further. id like to build a gun made of steel...

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So, a chamber of 3x3 square tubing roughly 18 long. This figures out to around 2.6 liters. Multiply by the energy produced by a stio mix of...
15 Replies

5914 Views

Last post by Fnord
Mon Mar 05, 2012 7:15 pm
7.5 Cm Pak 40 Project - Airsoft cannon replica

Last post by battlelava
Replies: 8
by battlelava » Tue Feb 21, 2012 10:42 pm

First post

So after to many months of debating on what to build I've finally settled for this. The devastating Pak 40.

So here's some specs for the build....

Last post

What about a pak36 with this for a breech without the charge at the end of the muzzle. I don't know how easy it would be to make an end attachment...

8 Replies

7668 Views

Last post by battlelava
Thu Feb 23, 2012 10:30 am
ideal chamber/barrel ratio. please help

Last post by battlelava
Replies: 12
by Nertzor » Sat Dec 17, 2011 1:39 pm

First post

ok i just typed up a long post and i accidentally closed the wrong tab, fml.

I need to know the best measurements for a 4' chamber 2' barrel spud...

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What size chamber do I need for about a 4foot long, 3inch pipe barrel?
Like what was just said get hdgt its free and play with the numbers there is...

12 Replies

25651 Views

Last post by battlelava
Wed Feb 22, 2012 9:32 pm
Firing problems HELP!

Last post by Fnord
Replies: 21
by blaineanator » Sat Feb 04, 2012 7:36 pm
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Hey guys so i built my first cannon its 4 inch combustion with 3 inch barrel. a BBQ grill sparker and a PVC screw back pretty basic. i tried metering...

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Yes, that's roughly correct. Check out the wiki link at the top of the page. Pretty much everything you've ever wanted to know is in there.
21 Replies

6060 Views

Last post by Fnord
Thu Feb 09, 2012 7:45 pm
Pressure Building Barrel

Last post by Technician1002
Replies: 9
by usdiver63 » Tue Feb 07, 2012 9:37 pm

First post

Greetings All,

Ok lets get to it. Now what I started with was your basic 4 chamber to 2 barrel, with a threaded coupler for portability and...

Last post

I know what my results are in the air cannon catagory. Bigger is better.

Note on the slug in the prior post, the 1 inch slug would be about 1/4 the...

9 Replies

3894 Views

Last post by Technician1002
Wed Feb 08, 2012 5:36 am
C:B ratio

Last post by Cpt Obvious
Replies: 2
by Cpt Obvious » Tue Feb 07, 2012 2:24 pm

First post

I read on the wiki of the BurntLatke study of C:B ratios. Using the second graph I calculated this.

With a 7 chamber of 2 sch40 PVC the inner volume...

Last post

ah, thank you once again, just what i was looking for.

2 Replies

1418 Views

Last post by Cpt Obvious
Tue Feb 07, 2012 2:29 pm
Floating barrel combustion cannon

Last post by Cpt Obvious
Replies: 4
by Cpt Obvious » Mon Feb 06, 2012 5:33 pm

First post

I'm designing a combustion cannon with a floating barrel and shell loaded, based off of the pneumatic cannon here

My intention is to apply it to...

Last post

ah I see, looks like I will rework my design, see how it stand up then.

4 Replies

1873 Views

Last post by Cpt Obvious
Tue Feb 07, 2012 2:13 am
Please evaluate my canon.

Last post by GreenLumos
Replies: 5
by GreenLumos » Mon Jan 30, 2012 2:45 pm

First post

Barrel 2 = 90 cm
Chamber 4 = 50 cm
guy claims up to 25 bars pressure From Spud
From Spud
From Spud
From Spud
From Spud
From Spud

Last post

Orange PVC Cement indeed....the tape is for incase it explodes, to reduce sharpnel.

it fired the cement gas...twice, but couldn't propagate a spark...

5 Replies

2369 Views

Last post by GreenLumos
Wed Feb 01, 2012 7:28 am
1/4" compression to NPT (for propane) in Australia

Last post by anarchy08
Replies: 3
by frigaardj » Mon Jan 16, 2012 2:16 am

First post

For a few years I have been living in France where it is easy to get components, however upon moving to Oz I am facing no end of problems.

My latest...

Last post

gday, i have as you found that AUS is crap for sourcing parts. try an actual plumbing store as i have done, reece or other big brands and walk into...

3 Replies

1892 Views

Last post by anarchy08
Mon Jan 16, 2012 9:22 am
break barrel launcher build

Last post by Major Collins
Replies: 2
by Major Collins » Thu Jan 12, 2012 4:09 am

First post

well i got a 50 mm outer barrel to sleeve nicely over 40 mm barrel
and a prototype grenade cartridge made up
i still need to do a few jobs on it...

Last post

update: i fixed on a thing to make the grenade cartridges fit centred

and attached a small fan to the receiver end of the cannon

still...

2 Replies

1687 Views

Last post by Major Collins
Mon Jan 16, 2012 2:45 am
legality in texas

Last post by mattyzip77
Replies: 9
by Nertzor » Wed Jan 11, 2012 12:54 am

First post

well, a few friends had me make some for them.

The cops were called, and aside from a noise complaint they were let go and told they could shoot...

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Im in Massachusetts, and I was told by a state trooper that basically if its pneumatic its legal, if its combustion, its not!! Hope that helps!!

9 Replies

8342 Views

Last post by mattyzip77
Wed Jan 11, 2012 3:47 pm
Syringe fuel injection?

Last post by OneIntervention
Replies: 18
by OneIntervention » Sun Jan 08, 2012 12:49 am
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Hey guys, I've reached a sort of stall here with the development of my first Spudgun. I've been having a debate with my dad about the Syringe loading...

Last post

@jimmy, I did this, but he says the time it takes to take the syringe off the butane tank and to put your finger onto it, all the butane is already...
18 Replies

6842 Views

Last post by OneIntervention
Tue Jan 10, 2012 10:49 pm
DWV Barrel?

Last post by frigaardj
Replies: 29
by frigaardj » Fri Jan 06, 2012 7:24 pm
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I live in Australia and have been considering making a tennis ball launcher for a while. Tennis ball bore is 65mm (2.5inch) SCH40.
When I went to...

Last post

I called up the Stepney branch today and the guy quoted $10/m for 65mm class 12, and $35/m for 80mm class 12. Considering the relatively low cost of...
29 Replies

9392 Views

Last post by frigaardj
Mon Jan 09, 2012 7:02 pm
Not all 16 year olds build crappy cannons

Last post by evanmcorleytv
Replies: 15
by CDHraider » Thu Feb 03, 2011 9:14 pm
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First post

Hey spudfiles my first post is finally here, and im here to prove that not all teenagers are idiots, even though we may occasionally act like it...

Last post

I'm 16, old, and I don't build crappy cannons.. BUT, awesome job on this build!! It's very compact, and well constructed!! AWESOME JOB!! Especially...
15 Replies

10969 Views

Last post by evanmcorleytv
Sat Jan 07, 2012 11:30 pm
Hey guys, Newbie here, any first-timer advice?

Last post by OneIntervention
Replies: 24
by OneIntervention » Wed Jan 04, 2012 11:27 pm
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Hi, I'm OneIntervention, and I'm completely new to SpudFiles and the Potato Gun universe. I've recently discovered some videos on Youtube dealing...

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That looks fantastic, however then it would be self-redundant if I wanted to open the back of the combustion chamber using a ball valve or something...
24 Replies

7618 Views

Last post by OneIntervention
Sat Jan 07, 2012 3:38 pm
T.B. Launcher

Last post by motorfixer1
Replies: 8
by motorfixer1 » Fri Dec 23, 2011 12:03 pm

First post

I recently completed a long time project of mine and thought I would post for all to see. It is a T.B. launcher I made for my Dad because I use his...

Last post

I love that launcher.. haha

Ya that is about one of the most well made launchers you can buy, well could buy as he is not taking orders currently....

8 Replies

5360 Views

Last post by motorfixer1
Sat Jan 07, 2012 2:59 pm
copper combustion cannon

Last post by OneIntervention
Replies: 35
by spudamine » Tue Apr 06, 2010 1:30 pm
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Copper combustion cannon:

As I’ve Already built pneumatics and a hybrid I thought I’d give a straight up combustion a go. This is a bit of a...

Last post

Fantastic, I love the breech loading mechanism, and the gun's got a steampunk-looking style too! And that's one of the best damage vids I've seen....
35 Replies

23666 Views

Last post by OneIntervention
Sat Jan 07, 2012 12:03 am

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