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

944945 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

305368 Views

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

Topics

Methyl isobutyl ketone.

Last post by SpudBlaster15
Replies: 14
by Bias_P11 » Thu Aug 25, 2011 10:09 pm

First post

So i bought some denatured alcohol. It has 1-4% methyl isobutyl ketone. Would it damage pvc or pvc cement?

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Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse...

14 Replies

5617 Views

Last post by SpudBlaster15
Fri Nov 04, 2011 12:29 am
Mythbusters experiment

Last post by MrCrowley
Replies: 3
by JABN » Thu Nov 03, 2011 9:23 pm

The Mythbusters made an episode were they did a test to see if a sewer explosion could send flying manhole covers. The did a small scale test were...

3 Replies

2335 Views

Last post by MrCrowley
Thu Nov 03, 2011 10:21 pm
Bernzomatic tank pressure

Last post by Technician1002
Replies: 3
by halvamir » Mon Oct 31, 2011 10:08 pm

First post

Hey does anyone know right off what the pressure is on these bernzomatic tanks?

Last post

O2 can be calculated from the volume stored in the tank and boyles law.

They dispense 1.1 cubic feet of gas at standard tmp/pressure.

On another...

3 Replies

4904 Views

Last post by Technician1002
Mon Oct 31, 2011 11:10 pm
combustion rifle ?

Last post by jackssmirkingrevenge
Replies: 8
by goa » Sun Oct 30, 2011 4:42 pm

First post

hi , i've been lurking the forum for a few days now.
i was planning to make a combustion rifle . but i don't know
how am i going to make a chamber....

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As others have stated you'll be fine with pressure rated PVC. If you want power and consistency, meter your fuel well. Not sure what sort of plastic...

8 Replies

2969 Views

Last post by jackssmirkingrevenge
Sun Oct 30, 2011 11:57 pm
First Potato Gun "improvements/feedback"

Last post by wyz2285
Replies: 25
by battlelava » Thu Oct 27, 2011 10:22 pm
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Well im starting my first potato gun :D and i want to start off somewhat complicated, with a semi realistic looking ww2 howitzer style. I'm going to...

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I don't know the ratio of a hybrid, as it depends the mix, but in principle it requires less chamber volume than a combustion with the same power
25 Replies

7661 Views

Last post by wyz2285
Sat Oct 29, 2011 11:27 am
Tell me what you think!

Last post by thekiller578
Replies: 12
by thekiller578 » Wed Oct 26, 2011 8:14 pm

First post

Alright i finally did some rework on the cannon,
now the only problem is the chamber,
i really dont know where to get my pvc pipe clearly but let...

Last post

Gluing the couplings inside the chamber should significantly strengthen the areas which have screws/fittings threaded through them. I've used this...

12 Replies

4823 Views

Last post by thekiller578
Fri Oct 28, 2011 12:06 pm
first potato gun and need help

Last post by mattyzip77
Replies: 13
by gvfc2 » Wed Oct 26, 2011 3:46 pm

First post

im trying to make a potato gun with a spark plug from a car peizo electric lighter and metal container. ive tried it in pvc but the park plug will...

Last post

Try spraying your fuel for a full 3 seconds without getting fuel on the electrodes. Get rid of the spark plug as well, you do not need it!!!

13 Replies

4501 Views

Last post by mattyzip77
Thu Oct 27, 2011 12:57 pm
Chamber to Barrel question

Last post by jackssmirkingrevenge
Replies: 1
by battlelava » Wed Oct 26, 2011 10:38 pm

First post

Ive been looking into making a breech loading potato gun and i wanted it to look like a WW2 howitzer. But when i was looking at a self contained...

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Do you mean my use of the same tube as both barrel and chamber?

Basically you'd need two tubes, one open on both ends which is you barrel, and...

1 Replies

1224 Views

Last post by jackssmirkingrevenge
Thu Oct 27, 2011 12:42 am
First propane Cannon

Last post by thekiller578
Replies: 6
by thekiller578 » Tue Oct 25, 2011 9:07 pm

First post

Alright guys i really need help on this, i just finished testing out my cannon, no flaws at the moment but i realized it may not be safe, i wanted to...

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alright thanks :) i plan on modifying the fan placement also, having it held by rings inside the chamber not only that but by adding some thickness...

6 Replies

3819 Views

Last post by thekiller578
Wed Oct 26, 2011 12:33 am
Spud Gun Science Fair Project

Last post by warhead052
Replies: 11
by SwissSpudGunner » Tue Dec 05, 2006 8:52 pm

First post

So I need some ideas to turn my spud gun into a science experiment. I have a combustion cannon. I use hairspray as a fuel.The gun is made out of...

Last post

Uh, I hope you guys realize this was last posted in 2006... Talk about bumping.

11 Replies

9097 Views

Last post by warhead052
Tue Oct 25, 2011 9:57 pm
My second Potato Gun

Last post by Brian the brain
Replies: 16
by Harys » Thu Oct 20, 2011 2:15 pm
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First post

Hi everyone,
First of all, please apologize some grammatical and other errors, my English is not very good, I am from Czech Republic (small country...

Last post

Legal?
Muhahaha...

A tourist can legally buy a BP percussion pistol for 150 euro in Prague.

Not saying I did that of course...

:roll:
16 Replies

7433 Views

Last post by Brian the brain
Fri Oct 21, 2011 11:50 am
importing from USG to Australia

Last post by Zeus
Replies: 10
by cfb_rolley » Fri Sep 23, 2011 11:39 pm

First post

just wondering, is there any aussies on here who have bought parts from ultimatespudgun.com and if so, were you hassled by customs or no?

I'm...

Last post

Gee, I've had this premonition that I'll develop a sudden interest in photography next year. I'll need one of those then.

10 Replies

2969 Views

Last post by Zeus
Fri Oct 21, 2011 4:35 am
Pirate Cannon

Last post by MrWizard
Replies: 9
by MrWizard » Tue Oct 18, 2011 2:39 am

First post

So my nephew got a little toy potato pop gun. He loves it. For his birthday, my wife asked me if I could upsize it into a potato gun. He is a big fan...

Last post

Thanks for the positive feedback :)

OK - my nephew is WAY too young to play with it by himself, so his dad really is the one who gets to fire it....

9 Replies

4685 Views

Last post by MrWizard
Tue Oct 18, 2011 3:02 pm
Just built first potato gun and it won't fire.

Last post by jimmy101
Replies: 27
by Kdmann64 » Tue Oct 11, 2011 10:58 am
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Ok please bear with me. I am totallynewto this. I watched a video on YouTube then went and built a potato gun. Its all PVC with with a grill igniter....

Last post

I guess we are going to disagree then. Though clearly both 7K degrees and tens of thousands of degrees are more than adequate to ignite propane in...
27 Replies

36184 Views

Last post by jimmy101
Sat Oct 15, 2011 10:48 am
Combustion chamber shape

Last post by cfb_rolley
Replies: 29
by sacklunch » Sun Oct 09, 2011 7:00 pm
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First post

So I'm new to this site, and it kicks a**!!!!! Getting ready to build my first ever spud cannon and I was wondering if shape of the cb matters to...

Last post

that woud make sense, that would mean (idealy) the flame front would go both directions and meet back at the T. I don't know why i hadn't thought...
29 Replies

7965 Views

Last post by cfb_rolley
Fri Oct 14, 2011 6:49 am
Oxygen Propane Cannon

Last post by Technician1002
Replies: 20
by enauman » Sat Oct 01, 2011 12:03 pm
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First post

I thought you guys might be interested in this:

Some time back I designed and built an Oxygen/Propane powered cannon for the 4th of July. It does...

Last post

I read your description. Nice write up. On the one I'm planning, for the flashback arresting, right at the metering ports would be a expansion...
20 Replies

7965 Views

Last post by Technician1002
Tue Oct 11, 2011 1:16 am
Why pyrodex should be ok with the batfe for use in spud guns

Last post by jrrdw
Replies: 27
by Joe470 » Sun Oct 02, 2011 7:01 pm
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First post

Spud guns aren't intended to be weapons.
One could argue that flare guns, model rockets, rope throwers, and powder primed nail guns, even decoy...

Last post

Can't be bothered replying to the rest. I'm calling troll.

I concur! Witch means I can delete it, lock it, report it to administration or leave it...
27 Replies

8619 Views

Last post by jrrdw
Sat Oct 08, 2011 5:45 pm
Ignition system and place on a combustion cannon

Last post by jimmy101
Replies: 11
by RJB INDUSTRIES » Mon Oct 03, 2011 5:34 pm

First post

Hi everyone!

where is the place, where the ignition will work on with maximum quality?

the picture show you one simple pvc structure that i am...

Last post

Yes, the fan insures that the fuel + air is well mixed.

Propane is a bit heavier than air (44 vs 28 and 32) but given enough time it will fully...

11 Replies

3877 Views

Last post by jimmy101
Sat Oct 08, 2011 10:44 am
having some problems with my advanced combustion

Last post by Rhawk14684
Replies: 7
by d.marty » Wed Jun 15, 2011 10:24 am

First post

Okay spudders. question... i used the burnt latke meter calculator and figured out that for my cannon (358 cubic inch chamber) required a 12 3/8...

Last post

1) Gun is pretty complicated and I can tell a lot of work has gone into it. Remember - the fancier the widget, the more likely things will go wrong....

7 Replies

2996 Views

Last post by Rhawk14684
Thu Oct 06, 2011 8:48 pm
need info on ignition system

Last post by Technician1002
Replies: 24
by dave6187 » Wed Sep 21, 2011 8:16 pm
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I have a camping trip coming up this weekend, and I wanted to beef up the ignition system in my combustion cannon before it, I was originally going...

Last post

I currently designed has a camera flash circuit, hardwired to keep charging whenever power is applied, driven by a AA. it discharges through a relay,...
24 Replies

6576 Views

Last post by Technician1002
Mon Oct 03, 2011 2:53 pm
Listen to what the man says!

Last post by jimmy101
Replies: 4
by Mopardik » Mon Sep 26, 2011 11:46 pm

First post

Like the title says. Well, not one man exactly, but the many regulars on this site. I recently completed the second version of my first combustion...

Last post

The inner bevel actually does two things. It improves the fit and it boosts the static friction between the spud and the barrel.

It turns out,...

4 Replies

2011 Views

Last post by jimmy101
Thu Sep 29, 2011 7:22 pm
Second incarnation of first cannon!

Last post by Mopardik
Replies: 9
by Mopardik » Mon Sep 26, 2011 11:15 pm

First post

Hey all! I've been lurking around here for a while now, but this is my first time chiming in. Back in Feb. I made my first cannon. It was a spray n...

Last post

Wow, thanks for all the kind responses! Sorry no damage pics Daniel, they were definitely on my to do list. We were down in the woods at my buddies...

9 Replies

3958 Views

Last post by Mopardik
Tue Sep 27, 2011 8:41 pm
Need help with design.

Last post by KS-collector
Replies: 17
by KS-collector » Thu Sep 22, 2011 8:02 am
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Im designing a propane powered launcher and have a few questions. My propane connection will be seperate from the gun, hooked by a hose. Its...

Last post

Yeah, I was working on some ideas at my parents house, and thats one of the ones I came up with. I think if I wedge the football it the end of the...
17 Replies

4923 Views

Last post by KS-collector
Fri Sep 23, 2011 10:07 pm
Hypervelocity Advanced* Combustion - WARTLv1

Last post by Crna Legija
Replies: 64
by DYI » Tue Sep 13, 2011 9:55 am
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Water-Aluminum Reaction Test Launcher

This is the record of my electric gun experimentation for summer 2011. I'll gloss over the basic principles of...

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/img]We need to win the lotto DYI. And you spud.

that would make a very nice video :lol:
64 Replies

29027 Views

Last post by Crna Legija
Fri Sep 23, 2011 9:10 am
Barrel to chamber size?

Last post by mattyzip77
Replies: 7
by KS-collector » Thu Sep 22, 2011 3:44 pm

First post

Im no math wiz, so can anyone double check this ratio for me? Barrel is 3 inches wide, 3 ft long. Chamber is 6 inches wide, 15 inches long. That...

Last post

The wiki knows all!! Also, look at other members c b ratio. I would say your close enough. Also try running different figures through GGDT. Welcome...

7 Replies

3130 Views

Last post by mattyzip77
Thu Sep 22, 2011 5:51 pm

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