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

640087 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

214798 Views

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

Topics

My sweet gun

Last post by metallover
Replies: 2
by metallover » Fri Apr 18, 2008 12:54 pm

First post

Here is a thread about my new spud gun. It is nothing way too special, but It is respectable in my eyes...

Here is a picture of my OLD gun (the bbq...

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Here are some pictures of my propane meter. I used teflon tape on the threads on the bottom half of a standard propane torch. The top half threads...

2 Replies

1611 Views

Last post by metallover
Fri Apr 18, 2008 1:30 pm
stun gun ignition help

Last post by spudmatic
Replies: 22
by spudmatic » Tue Apr 15, 2008 5:32 pm
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I recently purchased a 150,000 volt stun gun and made a 4 spark setup in my chamber. Now, the problem i face is, it wont spark :x . Does anyone have...

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Nope, still nothing :evil: . This is really frustrating, the only thing it does is jump the default gap I'll try posting pictures soon so you guys...
22 Replies

9466 Views

Last post by spudmatic
Thu Apr 17, 2008 7:01 pm
Grape Shot

Last post by spudman029
Replies: 34
by critical_al » Tue Feb 12, 2008 4:23 pm
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Would love to hear what you think of this.

Last post

It looks like you scrapped C-3P0 and used his body to make a cannon.
34 Replies

13934 Views

Last post by spudman029
Wed Apr 16, 2008 9:04 pm
Self Venting, Metered, New Cannon

Last post by Blitz
Replies: 10
by cannon freak » Wed Apr 16, 2008 3:16 pm

First post

Hey all!

Its been quite some time since Ive posted, made a cannon, or even been on the site, however, things have been a little boring so I decided...

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I really like how you made your metering dveice using copper piping. Nice job man!

10 Replies

4412 Views

Last post by Blitz
Wed Apr 16, 2008 7:16 pm
A nice chamber fan I found...

Last post by brother361
Replies: 10
by Blitz » Sun Apr 13, 2008 7:18 pm

First post

They're kind of hard to find nowadays, since most people are interested in quieter computers (Not something I was ever concerned with, since my...

Last post

so how far have you come along so far on it

Well, I acquired a piezo igniter and some 4 schedule 80 fittings for the breech of the gun, as well as...

10 Replies

3378 Views

Last post by brother361
Wed Apr 16, 2008 6:47 pm
Cardboard Cannon :D

Last post by THUNDERLORD
Replies: 27
by Fnord » Tue Nov 06, 2007 7:47 pm
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Yeah, it's a cannon made out of cardboard tubes.

This was the result of extreme boredom over the last two days, and the fact that golfballs fit...

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That is the coolest thing I've ever seen done with paper!!!

I made a rocket in shop class out of rolled up gum tape, that stuff can get thick as you...
27 Replies

12502 Views

Last post by THUNDERLORD
Tue Apr 15, 2008 9:24 pm
What type of BBQ lighter Is This??

Last post by nathan244
Replies: 19
by nathan244 » Sat Apr 12, 2008 7:17 pm
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This is a old BBQ lighter i found lying around.i thought it was a piezo so i took it apart. but it turns out to be a weird type of lighter. The red...

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the metal thing is too thick to fit between the orange thing and the metal rectangle
19 Replies

5912 Views

Last post by nathan244
Tue Apr 15, 2008 5:01 pm
Latke Data Collapse... The Plot Thickens

Last post by clide
Replies: 6
by D_Hall » Mon Apr 14, 2008 2:26 am

First post

OK, so we've spent a few days arguing over the long-barrel velocity collapse exhibited by the Latke L2 1.5 shooting spuds. I've spent a lot of time...

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Those wooden slugs have gaskets on the back don't they? The gaskets could be acting like a check valve. No blow-by when the pressure on the chamber...

6 Replies

2093 Views

Last post by clide
Tue Apr 15, 2008 4:41 pm
My New Combustion

Last post by Hubb
Replies: 21
by Hubb » Wed Apr 09, 2008 9:25 am
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This is my latest completed project: an advanced combustion launcher.

Chamber: 3 Sch40, 109cu in
Barrel: 1.5 Sch40, 44 long
Fuel: Metered propane,...

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The electrodes are about 1/8 apart.

I tested the igniter, prior to installation, and could maximize a spark at 1/2 . I was a little skeptic about...
21 Replies

6908 Views

Last post by Hubb
Tue Apr 15, 2008 3:45 pm
My spud cannon v2.2 (Updated 06.04.08 - Damage Video !!! )

Last post by Grizzlybear
Replies: 31
by Grizzlybear » Sat Apr 05, 2008 1:05 pm
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Before my gun wasn't so good so I listen to you guy's and make it better! I get the 2m barrel and most important the propane system :P :P absolutely...

Last post

Who cares of tree ! If it is my leg or stomach ?!!?
31 Replies

10272 Views

Last post by Grizzlybear
Tue Apr 15, 2008 9:35 am
Combustion Curve Investigation Cannon

Last post by Lentamentalisk
Replies: 17
by Lentamentalisk » Fri Apr 04, 2008 3:22 am
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decided that rather than hijack the Any theories for Latke's data collapse? thread , I would make my own here.
Here is the sketch up of the cannon...

Last post

Ok, so I went to Cal day and talked to tons of people in the ME department, as well as one of the operators of the combustion lab, and saw all sorts...
17 Replies

4846 Views

Last post by Lentamentalisk
Mon Apr 14, 2008 8:09 pm
Creating a non-permament seal on the end of my chamber

Last post by Blitz
Replies: 6
by Blitz » Mon Apr 14, 2008 3:25 am

First post

So I've reached an important step in the construction of my upcoming cannon.

For a chamber in an over-under design of a pneumatic, you typically...

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Some nice thoughts thrown around here, thanks guys! The flange method seems easier... but what DR did to his basketball cannon certainly looks nicer....

6 Replies

1713 Views

Last post by Blitz
Mon Apr 14, 2008 1:15 pm
Combustion dynamics/mechanics?

Last post by jimmy101
Replies: 14
by halvamir » Sat Apr 12, 2008 8:12 pm

First post

Hello Spudfiles,
I’m new to this site, this is my first post in fact and I've yet to build a spud cannon. I have recently become interested in the...

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One of the nice characteristics of combustion spud guns is that you can start simple then add more advanced features to the basic gun. That is a...

14 Replies

5439 Views

Last post by jimmy101
Mon Apr 14, 2008 1:14 pm
Why isnt this working?

Last post by psycix
Replies: 12
by Spudgun on Crack » Sat Apr 12, 2008 10:25 pm

First post

Today i just finished building my big ass metal pistol. It looked like something out of a sci fi movie, plus it weigh around 3lbs......

I would post...

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Assuming a single ignition point, the optimal chamber shape is a spere with the ignition in the middle or in cillindric shapes, about the same...

12 Replies

3222 Views

Last post by psycix
Mon Apr 14, 2008 5:34 am
Combustion sniper?

Last post by hyldgaard
Replies: 6
by Strake » Sun Apr 13, 2008 6:19 am

First post

hello all.
for some time ive been thinking of building a pneumatic sniper rifle but it would take to long to refuel and would have less power than a...

Last post

You could make yourself a refilling tank, then refilling of a pneumatic would be even quicker than refueling a combustion. Ofcourse you would have to...

6 Replies

2567 Views

Last post by hyldgaard
Mon Apr 14, 2008 5:10 am
Cleaning PVC

Last post by Blitz
Replies: 5
by Sonicboom101 » Sun Apr 13, 2008 2:40 pm

First post

I have a advanced combustion and ive had it for about a year now its starting to show signs of wear and tear there is big scratches with dirt and...

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Acetone melts PVC. Although if you dilute some, you probably could use it in limited quantities.

5 Replies

1728 Views

Last post by Blitz
Sun Apr 13, 2008 3:46 pm
Chamber Fan Placement

Last post by psycix
Replies: 6
by biggsauce » Fri Apr 11, 2008 1:19 pm

First post

Has anyone mounted a chamber fan say, midway in their chamber and had any trouble with it melting? I would figure the ideal spot for a fan would be...

Last post

That overheating would be only after a period of extreme rapid fire action I suppose.

6 Replies

1640 Views

Last post by psycix
Sun Apr 13, 2008 5:46 am
My Civil War Cannon

Last post by miskaman
Replies: 18
by miskaman » Sat Oct 06, 2007 11:57 pm
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Finally, I finished my second cannon. The first one was a piece of crap and broke. So instead of going for just a simple gun last time, this time I...

Last post

So how did you end up mounting these wheels?

I actually used a strip of sheet metal about 1 wide, and about 10 inches long and bent it to form a U...
18 Replies

10006 Views

Last post by miskaman
Sat Apr 12, 2008 7:55 pm
reliable sparker

Last post by lockmanslammin
Replies: 12
by WEEMAN » Sat Apr 05, 2008 10:56 am

First post

i need a cheap$$ way to spark a combustion
NOT the camrea flash or any thing big
i need something small cheap that works... :?:
i was thinking a...

Last post

I spent about 10 bucks with shipping for a 70kv stun gun a few years ago online. Good price and GOOD ignition.

Lock

12 Replies

3491 Views

Last post by lockmanslammin
Fri Apr 11, 2008 9:30 pm
Any theories for Latke's data collapse?

Last post by boilingleadbath
Replies: 50
by D_Hall » Tue Apr 01, 2008 9:04 pm
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Look at the hand side of that plot... What would make the velocity drop off so dramatically?

The rapid climb on the can be explained by ongoing...

Last post

Well, I dunno the velocity-weighted mean gas temperature in the barrel... but I'd expect that it's below the average temperature in the gun.
50 Replies

20838 Views

Last post by boilingleadbath
Fri Apr 11, 2008 2:31 pm
High Voltage wire

Last post by jimmy101
Replies: 11
by nexis » Thu Apr 10, 2008 2:14 pm

First post

I'm working on a new gun for some summer fun. My old guns have had a slow progression into the advancements. First gun was a straight gun with a...

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...keep your leads as short as possible, and cover each lead with 3 layers of heat shrink tubing all the way into your stun gun housing (nip off the...

11 Replies

3039 Views

Last post by jimmy101
Fri Apr 11, 2008 12:06 pm
Spark gap in a metal chamber.

Last post by Spudgun on Crack
Replies: 8
by Spudgun on Crack » Thu Apr 10, 2008 8:33 pm

First post

I am building a small but very cool and reliable potato pistol.

I modded a paintball gun grip and mounted a sparker behind the trigger, it works...

Last post

I have a lot of coaxial cable lying around so i will defiantly be able to use that.

I am going to trying to use the flyback cable as it is smaller...

8 Replies

1758 Views

Last post by Spudgun on Crack
Fri Apr 11, 2008 11:21 am
Propane tank fitting?

Last post by MrCrowley
Replies: 4
by Spudgun on Crack » Thu Apr 10, 2008 5:31 pm

First post

Does anyone know where to get a fitting for a bernzomatic propane tank?

I have seen them in videos as a small brass connector that attaches to the...

Last post

I was also looking then found. You get them in bernzomatics brazeing torch kit
Yeah but the threads are compression fittings, and if you can't find...

4 Replies

1751 Views

Last post by MrCrowley
Fri Apr 11, 2008 2:01 am
long range 50mm canon lr50 (cannon and flammethrower)

Last post by mega_swordman
Replies: 5
by pertibilium » Thu Apr 10, 2008 6:59 pm

First post

my new homemade canon .what do you think about it? it works with black powder and the flamethrower use an electrical supply to run. cardridges need...

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ooooh, dans francais :)
and you broke some rules like all those people up there^ said

Yes, but I also commented on how awesome it was :roll:. Not...

5 Replies

2808 Views

Last post by mega_swordman
Thu Apr 10, 2008 11:03 pm
Jim's Harley

Last post by Jared Haehnel
Replies: 24
by scottcrete » Mon Apr 07, 2008 3:17 pm
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This page is to show off the combustion i built for my father n law today.. i worked on it for 2 days on and off.. but not alot of work.. i made all...

Last post

Hey, Scott thats too bad...we have enjoyed seeing your projects best of luck 8)
24 Replies

8922 Views

Last post by Jared Haehnel
Wed Apr 09, 2008 7:01 am

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