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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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...

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

944922 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

would this design work?

Last post by mark.f
Replies: 10
by iloveairguns » Thu Dec 27, 2012 6:35 am

First post

ok imm asking that would this kind of combustion cannon work. It doesnt have a chamber really cause the barrel is the chamber at the same time and...

Last post

well this what ill say will be a bit derailed, but any instructions to build a pneumatic one with a single barrel maybe i dont build a combustion...

10 Replies

5302 Views

Last post by mark.f
Thu Jan 24, 2013 9:22 am
Airsoft Cannon

Last post by mark.f
Replies: 10
by Boltgunner » Fri Aug 24, 2012 11:06 am

First post

Hello all,

I am building a new canon for airsofting. I do launch potatoes, tennis-balls, and even large sticks when we run out of ammo. I need...

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Any cannon that can shoot 200 meters with a Nerf pocket football shouldn't be shot at people closer without having the muzzle velocity be...

10 Replies

5082 Views

Last post by mark.f
Thu Jan 24, 2013 9:15 am
Got Arrested For Shooting My Tennis Ball Cannon (well almost

Last post by Squerl101
Replies: 21
by rustlerdude987 » Sun Jan 20, 2013 5:17 pm
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So i figured i would share my story with you guys today. so im 16 and Yesterday i was out with a couple of friends shooting my 6ft tennis ball cannon...

Last post

Same here, I live in an urban area in Wisconsin, my cannon sounds like dynamite, and the cops have never touched me.

Knock On Wood...
21 Replies

10799 Views

Last post by Squerl101
Thu Jan 24, 2013 12:56 am
What's the best fuel for good power and a nice muzzle flash?

Last post by Squerl101
Replies: 13
by Squerl101 » Wed Jan 23, 2013 3:16 pm

First post

Hey guys, I have been spudding for a while now. I currently use AquaNet hairspray for fuel. It produces excellent power, but no visible muzzle flash...

Last post

I'll read everything. It looks like a very useful site.

13 Replies

5529 Views

Last post by Squerl101
Wed Jan 23, 2013 5:02 pm
This math look correct to you guys?

Last post by mark.f
Replies: 3
by Bangotwago » Wed Jan 16, 2013 7:06 pm

First post

Built a prototype already. Ended up with 1:5-1 and Im not completely satisfied with power. Second unit I'm going to learn from my mistakes. Wanted...

Last post

The fuel left in the meter is accounted for by the fact he is using 14.7 PSI on the left hand side, but using 40 PSI as is on the right hand side as...

3 Replies

3254 Views

Last post by mark.f
Thu Jan 17, 2013 3:36 pm
Black Monster 2.0

Last post by jackssmirkingrevenge
Replies: 9
by zacgun38 » Sun Oct 30, 2011 2:29 pm

First post

Hello, i am french and i sorry for my very bad english!
I use the site Reverso to translate texts thus thank you has you not to use an abbreviation....

Last post

lol i thought this was a new thread and was about to write the same comment I wrote before.

9 Replies

6000 Views

Last post by jackssmirkingrevenge
Tue Jan 15, 2013 7:00 pm
Spudguns legal in New Zealand?

Last post by Zeus
Replies: 13
by Pyro_Boy » Wed Oct 11, 2006 12:33 am

First post

Are combustion Spudguns legal in nz.
If so on what grounds do you have to be 18 to pocess or something

please awnser

Thanks pyro :wink:

Last post

Nice, my sister and niece live up there. I'm in central Vic.

If you're careful, you'll be right, having a gun license means you can make a lot of...

13 Replies

8796 Views

Last post by Zeus
Tue Jan 08, 2013 6:57 am
[PAL] Pulvérator

Last post by smirpab
Replies: 2
by smirpab » Sat Jan 05, 2013 7:45 pm

First post

Hi all, (sorry for english, i'm French ;)).

I present my latest creation, a PAL to change a little bit.

So it had to be powerful, simple, reliable...

Last post

Thank you very much :D.

2 Replies

2400 Views

Last post by smirpab
Sun Jan 06, 2013 9:36 am
.54 pistol

Last post by jean
Replies: 3
by jean » Thu Dec 27, 2012 5:04 pm

First post

hi

my pistol
chamber 55ml
barrel 13.6mm/17,5cm

Last post

doing some v0-v8 test today using audacity

with 1,7g full bore wax slug 70m/s (17cm barrel)
with 0,2g 6mm bb 85m/s (17cm barrel)
with 0,2g 6mm bb...

3 Replies

3277 Views

Last post by jean
Sat Jan 05, 2013 8:52 am
Combustion Ratios

Last post by jimmy101
Replies: 6
by Essohbe » Sat Dec 29, 2012 10:41 am

First post

Why are allot of people I read making cannons talking about trying for combustion ratios of 4:1 and 1.5:1, etc...

From everything I've read the...

Last post

That should read most fuel efficient ratio .

I saw a ballistic graph where they measured the muzzle velocity of a spud and all indications were...

6 Replies

3108 Views

Last post by jimmy101
Mon Dec 31, 2012 1:49 pm
Want build a signal cannon

Last post by Essohbe
Replies: 14
by Bangotwago » Sun Dec 30, 2012 4:24 pm

First post

I built my first spud cannon yesterday and I think I have found enough info on here to get me thru that project. What I really want to do is be able...

Last post

When the courts are stacked full of leftists then that is the quality of opinion they will rule with. Just because a court rules on something doesn't...

14 Replies

5965 Views

Last post by Essohbe
Mon Dec 31, 2012 11:19 am
How much propane to meter?

Last post by Essohbe
Replies: 6
by Essohbe » Sat Dec 29, 2012 5:13 pm

First post

How do you figure out how much PSI you need to meter your cannon at?
Is there data that I haven't found or is everyone just trial and error sort of...

Last post

Man, thanks for the help. I'm retarded. Seriously.

Alright so bsically I'll just measure the volume of the meter I make then I will plug that into...

6 Replies

2980 Views

Last post by Essohbe
Sun Dec 30, 2012 10:24 pm
I need combustion chamber math help for 3 or 4" barrel.

Last post by Essohbe
Replies: 10
by Essohbe » Sun Dec 16, 2012 4:22 pm

First post

Alright, I am TERRIBLE with math and I need help figuring out how big a combustion chamber I'd need for a 6 PVC chamber with a 4 PVC barrel (or 3 )....

Last post

Good to hear.

QWERTYUIOP{ASDFGHJKL

10 Replies

5616 Views

Last post by Essohbe
Sun Dec 30, 2012 12:09 pm
Aluminum Cannon w/ Mixing Piston

Last post by auxiliary
Replies: 5
by auxiliary » Tue Dec 18, 2012 3:58 pm

First post

I built this cannon mostly from scrap aluminum I purchased for $4.50 a pound. I ordered all the other stuff from MSC Direct and McMaster Carr. Plus...

Last post

I made two gaskets out of PVC bathtub liner that I had lying around. The five bolts just squeeze everything together.

5 Replies

3349 Views

Last post by auxiliary
Wed Dec 19, 2012 12:48 pm
Remote Fired Powder Cannon

Last post by Technician1002
Replies: 6
by wrath144 » Tue Dec 11, 2012 4:30 pm

First post

Been a member here for a long time, never made anything worth posting. Figured this one would be worth it ;)

Purpose:
Design and build a remotely...

Last post

To adjust the current on your wire to prevent burning it in two, use a longer piece and shorten it just enough to get it to glow. Then you can use it...

6 Replies

2664 Views

Last post by Technician1002
Wed Dec 12, 2012 5:39 am
Sparkplug powererd spudgun

Last post by mr.potatohead
Replies: 12
by mr.potatohead » Sat Nov 10, 2012 12:55 pm

First post

well has any one made a potato gun using the spark plug as an ignition like it should work

Last post

yes.. definitly

12 Replies

9222 Views

Last post by mr.potatohead
Sat Dec 01, 2012 8:33 pm
Regulating propane

Last post by BigGrib
Replies: 8
by CS » Wed Oct 10, 2012 5:05 pm

First post

Both type of regulators I used never stopped venting. My guess is the temperature of the propane is making seals leak because the rubber is...

Last post

What size bottle are you using? 5 lb or 14 oz? If you're using a 5 lb tank I recommend bayou classic 0-30 adjustable regulators. They have a 1/4 FPT...

8 Replies

5587 Views

Last post by BigGrib
Mon Nov 26, 2012 1:12 am
PMC- Multi chambers

Last post by jackssmirkingrevenge
Replies: 10
by Petitlu » Tue Nov 06, 2012 4:30 pm

First post

I thought the concept of multi chambers to double the acceleration of the projectile, I do not know if this is true but hey I suggested the idea...

Last post

Multi-chambers, while they may not reach a higher velocity, allow for a more controlled acceleration curve for sensitive projectiles. On a combustion...

10 Replies

6028 Views

Last post by jackssmirkingrevenge
Fri Nov 16, 2012 12:36 am
Poly-19 - PAL polycarbonate

Last post by jackssmirkingrevenge
Replies: 3
by Petitlu » Tue Nov 06, 2012 4:39 pm

First post

Hi, I present the Poly-19, made in 1 hour!
Barrel and fittings PVC-P, chamber polycarbonate.
Cal: 19mm, 720mm barrel.
Chamber: D40mm, L: 340mm
Multi...

Last post

For Thorjack, I would need a gun metal!
And 19mm internal, it is difficult to find ...

I used PVC pipe as a barrel for hybrids up to 15x:

The...

3 Replies

2647 Views

Last post by jackssmirkingrevenge
Wed Nov 07, 2012 12:48 am
8 inch Mortar

Last post by archie370
Replies: 16
by Spuddin » Mon Jun 23, 2008 8:05 am
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First post

A friend of mine gave me a piece of 6 inch and 8 inch pipe so i built another mortar with the 8 inch. it has a 1/2 inch ball valve to add the fuel...

Last post

Thats a sweet setup man , you might need to make the combustion chamber more powerful, maybe use a different fuel, but the cannon still pretty sweet,...
16 Replies

11199 Views

Last post by archie370
Fri Nov 02, 2012 3:43 pm
16 inch gb-barrel

Last post by archie370
Replies: 16
by jean » Sun Oct 21, 2012 5:19 am
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First post

hi

what is the best chamber size for a 16 inch golfball barrel?
i know the 0.8 rule and i used hgdt.... but it seems so small with only 29inch^2....

Last post

Keep at it buddy and finish the cannon then well comment on what you have done :) and give you advice :)
16 Replies

4951 Views

Last post by archie370
Thu Oct 25, 2012 3:31 pm
Stone Age Tech

Last post by jimmy101
Replies: 15
by Aethir » Mon Oct 08, 2012 6:20 am
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First post

after spending the last couple days getting thoroughly lost in mountains of threads, I thought I'd throw my 2c worth down memory lane, crossed with a...

Last post

If you read the fuels pages it is pretty well explained why it is the volume of the air (hence the amount of oxygen) in the chamber that is by far...
15 Replies

4697 Views

Last post by jimmy101
Sun Oct 14, 2012 5:42 pm
Injection gas electric automatic Please Help !!! andurilmike

Last post by jackssmirkingrevenge
Replies: 13
by andurilmike » Sat Jul 14, 2012 10:13 pm

First post

My question is, is what I could not put a motor for pressing the tube with just a bouton.Des ideas?

Shot at 2012-06-27

please looks at the...

Last post

aller dans un animalerie, ils ont plusieurs tailles de tubes pour aquariums.

13 Replies

5656 Views

Last post by jackssmirkingrevenge
Sat Oct 13, 2012 12:05 am
Propane leaving barrel

Last post by ninjamonkey127
Replies: 26
by ninjamonkey127 » Thu Oct 04, 2012 11:59 am
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First post

Hello, I am a new member to this site and I also built my first potato combustion cannon. I just got done building it today, but i can't get it to...

Last post

The leak u have sounds like your gas valves are not 100% tight.

second thing that hits me, it sounds like u have not ventilated the chamber with...
26 Replies

8932 Views

Last post by ninjamonkey127
Thu Oct 11, 2012 8:57 pm
30kv igniter questions

Last post by natas
Replies: 11
by hawktalk » Sun Sep 02, 2012 6:20 am

First post

Im planing on using a 30kv module from ultimatespudgun.com as my ignition system for my new gun i was wondering what else do i need to get the module...

Last post

the ignitor from USG can be connected directly to a battery ( at least from the one i got from USG ), if you do, it will continue to ignite untill...

11 Replies

5959 Views

Last post by natas
Thu Oct 11, 2012 4:50 pm

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