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...

Last post

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

942780 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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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

304515 Views

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

Topics

Ignitor not working/no spark

Last post by Moonbogg
Replies: 2
by PhantomCougarJT5 » Mon Jun 14, 2021 2:47 pm

First post

I decided to make my spud gun so there is 4 different sparks in the combustion chamber. The problem is when i first rigged it up it was making a...

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The sparking may be unreliable because the gap is pretty big and there's 4 of them that the electricity has to jump across. If it worked reliably...

2 Replies

7924 Views

Last post by Moonbogg
Thu Jun 17, 2021 12:31 am
Valvegun

Last post by jackssmirkingrevenge
Replies: 1
by Hessenbanger » Tue Apr 20, 2021 3:16 pm

First post

My new toy. It shots nerf darts and everything attached to a dart. The Problem with the uncompressable venturi mix is solved by some valves. .
The...

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Very post-apocalyptic, I like it :D

1 Replies

8989 Views

Last post by jackssmirkingrevenge
Sun May 02, 2021 7:55 am
Build Log: MFIC

Last post by Blitz
Replies: 76
by Blitz » Wed Jul 24, 2013 12:01 am
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So, here I will be documenting my progress on my newest project.

I can't say there's much that is overly innovative about this, I would say the only...

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I'm familiar with 40mm grenades and 37mm, and other projectiles, but that doesn't make 40mm any less of an odd pipe diameter in the United States....
76 Replies

121341 Views

Last post by Blitz
Thu Apr 15, 2021 12:53 am
ElectroThermal Cannon

Last post by hectmarr
Replies: 11
by headslammer » Tue Jan 26, 2021 6:00 pm

First post

Hello everyone!
I've been a lurker for a year or so now, having come here for help and research on multiple occasions on nearly all of my projects....

Last post

In my personal opinion, I believe that hybrids have the advantage of needing less air than tires, to achieve the same power. This is attractive. On...

11 Replies

22204 Views

Last post by hectmarr
Wed Feb 03, 2021 4:12 pm
Arduino automated spudgun fuel injector

Last post by GalFisk
Replies: 9
by GalFisk » Tue Aug 04, 2020 4:52 pm

First post

Hi all, I've been away from the forum since forever, but I'm still firing my old cannons now and then. They all reside at the airfield where I...

Last post

Thanks. The transistor for the solenoid actually burned out last weekend, so I put another MOSFET there, same kind that I used for the blower. Now it...

9 Replies

34235 Views

Last post by GalFisk
Wed Oct 07, 2020 4:08 pm
An Attempt at Comparing Different Spud Guns!

Last post by Moonbogg
Replies: 1
by saveitforparts » Wed Sep 09, 2020 5:27 pm

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I haven't seen a lot of side-by-side comparisons of different potato cannon designs. Since I have a bunch lying around, I figured I'd do some...

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LOL. Cool video! If you want to blow your own mind, build a metered propane cannon with a chamber fan. Probably get around 120 meters per second with...

1 Replies

10375 Views

Last post by Moonbogg
Thu Sep 10, 2020 4:55 pm
Colinfurze makes a combustion repeater

Last post by jackssmirkingrevenge
Replies: 1
by Moonbogg » Thu Jul 09, 2020 2:36 pm

First post

It looks awesome. Only question I have is how does he vent if before the next shot?

Last post

Only question I have is how does he vent if before the next shot?

Good question, there doesn't seem to be a fan or anything. At about 11 minutes...

1 Replies

7938 Views

Last post by jackssmirkingrevenge
Sun Jul 19, 2020 5:50 am
Happy 4th to you all

Last post by jrrdw
Replies: 1
by KannonKing » Sat Jul 04, 2020 12:08 pm

First post

Wishing you many sharp reports!

Last post

Happy belated 4th! 😀

1 Replies

19414 Views

Last post by jrrdw
Mon Jul 06, 2020 3:37 am
Using Burnt Latke's fuel tool

Last post by KannonKing
Replies: 3
by thejackal » Mon Jun 29, 2020 8:17 pm

First post

Greetings fellow spud chunkers, I've recently restarted a project (a golfballer similar to a BL-520 our friends in Hawaii used to make) after putting...

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Correct, meter pipe volume needs to be approximate, with the fine tuning of moles of propane to moles of oxygen being done by adjusting pressure in...

3 Replies

25661 Views

Last post by KannonKing
Wed Jul 01, 2020 3:04 pm
Multiple ignition points?

Last post by Moonbogg
Replies: 3
by speedster » Sun Jun 14, 2020 6:15 pm

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Im thinking about making a spark strip, but I was just wondering if there is really any evidence to support that miltiple ignition points are better...

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I wonder if the benefit of 2 gaps vs 1 is greater than the benefit of 3 vs 2. I'd imagine diminishing returns would be kicking in at 3 gaps. As you...

3 Replies

7451 Views

Last post by Moonbogg
Thu Jun 18, 2020 12:03 am
New member... my baby, Big Red

Last post by Doc j
Replies: 15
by KannonKing » Fri Apr 24, 2020 10:26 am
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Bolt-action sniper with metered injection, mixing/exhaust fan, 12 round mag. Thoughts?

The barrel is what slides rather than a bolt, and when the...

Last post

Pickle me grand mother.
big belly laugh .
Dunno about ya tech thing variables golf balls.
Yeah 750 mtr range...
I av golfer, smak em 240 mtrs....
15 Replies

58778 Views

Last post by Doc j
Mon Jun 15, 2020 6:09 pm
I was hoping for some feedback on my oxy-propane combustion cannon.

Last post by jimmy101
Replies: 7
by uninc4life2010 » Sun May 24, 2020 3:21 am

First post

I built a standard combustion cannon with an auxiliary fill chamber and an integrated pressure gauge. I was disappointed with the performance when I...

Last post

The biggest I usually see is 150 ml. That's big enough for 1x in a 3.75 liter (229 in^3) chamber, which is a pretty big chamber.

7 Replies

25983 Views

Last post by jimmy101
Mon Jun 15, 2020 4:58 pm
Propane failing to ignite reliably.

Last post by jimmy101
Replies: 9
by uninc4life2010 » Sun May 24, 2020 11:27 pm

First post

Hello,

I have been using a blue canister of Bernzomatic propane as fuel. My propane fill chamber is 1/2 ID and 12 long with an integrated pressure...

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Easiest way to understand C:B ratio is that if the barrel is too short, the projectile is still accelerating when it leaves the barrel (sub optimal),...

9 Replies

43148 Views

Last post by jimmy101
Mon Jun 15, 2020 4:50 pm
New to this all

Last post by jackssmirkingrevenge
Replies: 4
by whitt » Fri Jun 05, 2020 9:59 pm

First post

I am very new to this all and I was hoping someone could explain some stuff to me. Just what seems to be basic stuff, like what is the purpose of a...

Last post

Download link:

4 Replies

26117 Views

Last post by jackssmirkingrevenge
Fri Jun 12, 2020 5:48 am
Question regarding fueling, fan, and ignition.

Last post by Moonbogg
Replies: 4
by speedster » Thu Jun 04, 2020 10:59 pm

First post

I am making my third combustion cannon, which is more advanced than the others and I have a few questions. My chamber is 3 inches in diameter and 18...

Last post

I see what you're saying about the spark in the middle not doing much for performance. I saw a smartereveryday video where it actually resulted in...

4 Replies

14973 Views

Last post by Moonbogg
Sat Jun 06, 2020 2:16 pm
Propane fuelmix problem solved.

Last post by Cthulhu
Replies: 1
by Hessenbanger » Sun Apr 12, 2020 7:46 am

First post

IMG_20200412_144212.jpg We all know, how tricky it is to get the perfect air-gas mixture out of a propane torch inside a System with a loaded...

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This is pretty interesting, is there any loss in performance from the valve needing to close during combustion rather than before?
And how about...

1 Replies

5323 Views

Last post by Cthulhu
Sat Apr 25, 2020 1:39 pm
The Coronator - Pure mechanical combustion NERF Blaster

Last post by mark.f
Replies: 1
by Hessenbanger » Tue Apr 14, 2020 8:40 am

First post

IMG_20200414_151303.jpg

I ever had the problem, to get the mostly perfect mixture of a Butane Torch inside the combustion chamber with a loaded and...

Last post

Nice, but we're gonna need some more pictures to explain what's going on here. ;)

1 Replies

5011 Views

Last post by mark.f
Fri Apr 17, 2020 7:40 am
How I'm killing time during coronavirus

Last post by Hessenbanger
Replies: 3
by blk94f150 » Tue Mar 24, 2020 1:10 pm

First post

Pun intended lol. I'll get to some more spud gun stuff that you all requested soon!

Last post

#meetoo (^^) IMG_20200414_151300.jpg

3 Replies

6183 Views

Last post by Hessenbanger
Tue Apr 14, 2020 11:12 am
Can't download GGDT. You have?

Last post by jackssmirkingrevenge
Replies: 1
by mrfrozzer » Fri Mar 20, 2020 11:15 am

First post

Hi! I'm building my second combustion spud gun, and i need to do some calculations.
I want to download GGDT from this article , but the site, that...

Last post

Welcome to the forum! You can find them here, for a combustion spud gun you want HGDT:

1 Replies

24875 Views

Last post by jackssmirkingrevenge
Mon Mar 23, 2020 9:20 pm
Shooting more stuff with my spud gun! Watermelon and a couple boards

Last post by blk94f150
Replies: 5
by blk94f150 » Sat Mar 07, 2020 3:51 pm

First post

I got a request to blast a watermelon so I did that, some osb, and plywood. Enjoy!

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I'll note all of these. I have an old clock that needs blasting and I'm probably gonna do a shotgun series like legos, dog food, paintballs, etc.

5 Replies

12538 Views

Last post by blk94f150
Thu Mar 12, 2020 11:29 am
Shooting various materials with my spud gun

Last post by blk94f150
Replies: 3
by blk94f150 » Fri Feb 21, 2020 11:44 am

First post

Hi guys! I made this video of my spud cannon shooting through a bunch of different materials. Enjoy!

Last post

Thanks for the comments! I did get some suggestions from the video comments and I'll have more in the near future.

3 Replies

28917 Views

Last post by blk94f150
Sun Mar 01, 2020 3:32 pm
Are these parts adequate for Oxy/Acetylene or Oxy/Propylene?

Last post by wdr0
Replies: 6
by SpudGunNoob » Sat Jun 01, 2019 10:51 pm

First post

Are these parts adequate for an Oxy/Acetylene or Oxy/Propylene build? I'm planning my first serious build and want to make sure this is safe enough...

Last post

As an aside, if you have a commercial plumbing supply house near you most have sch 80 steel nipples/fittings in stock and in my experience are much...

6 Replies

7624 Views

Last post by wdr0
Fri Dec 13, 2019 12:45 pm
Why not to use acetylene as spud gun fuel.

Last post by Jameshudson506
Replies: 77
by Extrusion » Mon Oct 09, 2006 1:22 am
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I think this video will probobly sum it up for anyone who would ever think of using it without doing some reserch.

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The Air Force just did a test using a bunch of different fuels and acetylene one by a mile. I have been using acetylene in my spud guns for years...
77 Replies

65256 Views

Last post by Jameshudson506
Thu Dec 12, 2019 6:59 am
Self contained 40mm propane grenade

Last post by hectmarr
Replies: 20
by Wyrlok » Thu Nov 14, 2019 5:57 pm
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Hi all :)

I plan on making propane combustion 40mm grenades. As a first step I want to make the a simple M79 style launcher, breach action and all,...

Last post

It would be a master weapon ... it can even be done semi-automatically or repetitively, in its humblest version. It is a project for someone with...
20 Replies

19624 Views

Last post by hectmarr
Mon Nov 18, 2019 9:30 am
Coax Marshmallow Beschleuniger - the softballmod for spudgun

Last post by jackssmirkingrevenge
Replies: 1
by Hessenbanger » Thu Aug 22, 2019 2:44 pm

First post

This little Bastard is very loud in reality. It single shoots a marshmallow Salute. A funtoy for barbecues.
The most important part is the...

Last post

A funtoy for barbecues.

Looks like it, nice job! Basic but things don't have to be complex to be fun :)

1 Replies

4590 Views

Last post by jackssmirkingrevenge
Tue Aug 27, 2019 6:37 am

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