Combustion Cannons

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Announcements

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...

Last post

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

624663 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

211733 Views

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

Topics

O2 + C3H8 timed fueling

Last post by matti

by matti » Wed Nov 09, 2016 11:38 am

Hi ! I need help.. for fueling..

I have been designing fueling system for 5:1 oxy-propane mix and I'm having some trouble finding a way to get...

0 Replies

9017 Views

Last post by matti
Wed Nov 09, 2016 11:38 am
Simple Pump Action Design

Last post by Alanstone
Replies: 10
by jean » Wed Sep 28, 2016 1:55 pm

First post

Hi,
i am a rookie with cad, but it will be enough to understand the whole concept.
Hopefully your will leave a comment or critique

The design comes...

Last post

Looking good. It's coming along nicely. I am looking forward to how your project works out.

10 Replies

8822 Views

Last post by Alanstone
Tue Nov 01, 2016 1:35 pm
Garden Sprayer Cannon (Chappy)

Last post by auxiliary
Replies: 4
by auxiliary » Fri Oct 14, 2016 9:58 pm

First post

Hi Spudders,

Construction:

This is my weed sprayer cannon! The most noticeable feature is that the chamber is made from a 1 gal. garden sprayer...

Last post

The next installment is TBD and will be a completely new cannon! I decided to scrap Chappy since it doesn't work reliably due to insufficient venting...

4 Replies

6105 Views

Last post by auxiliary
Mon Oct 24, 2016 9:53 pm
Displacement Fueling/Venting Concept

Last post by auxiliary
Replies: 6
by auxiliary » Thu Oct 06, 2016 4:20 pm

First post

Hi Spudders!

I thought of a way to fuel/exhaust a combustion potato cannon is a simple way. I originally came up with the idea when I decided I...

Last post

Ok Gotcha! Check out the thread below this one. I made the cannon it's it's called Chappy. I hydrotested the chamber though out of curiosity and it...

6 Replies

7483 Views

Last post by auxiliary
Sat Oct 22, 2016 6:16 pm
Help with a combustion mortar please

Last post by rescue341
Replies: 7
by rescue341 » Thu Oct 06, 2016 2:05 pm

First post

hey all.

im in a pickle i have a big airsoft game next sat. and thought hey ill build a potato gun mortar. I believe i underestimated these boom...

Last post

i tried the touch hole and i think im almost there. the touch hole ignites the entire chamber if the barrel is pluged and the end cap is off but if...

7 Replies

7253 Views

Last post by rescue341
Fri Oct 07, 2016 4:10 pm
Help with metering setup?

Last post by cfb_rolley
Replies: 2
by cfb_rolley » Sun Sep 25, 2016 9:50 pm

First post

Hi, it's been a really long time since I've lurked around these forums, although I'm still launching vegetables and things. But, I'm hitting a dead...

Last post

Awesome! I think you covered all bases for me. I do occasionally lurk through the showcases from time to time, and although I've been here a long...

2 Replies

3935 Views

Last post by cfb_rolley
Mon Sep 26, 2016 10:21 am
Rifle combusted "Alcoholerito 2"

Last post by hectmarr
Replies: 1
by hectmarr » Sat Sep 10, 2016 5:45 pm

First post

I'm new here and this is my first post.
First, I apologize for my English is basic ... Despite this, I wanted to share with you this project.

This...

Last post

This is a basic video performance of this little weapon. At this present time, it works qunque must solve several problems.
After three or four...

1 Replies

3548 Views

Last post by hectmarr
Tue Sep 13, 2016 12:26 pm
propane gun

Last post by jackssmirkingrevenge
Replies: 7
by alabama mike » Wed Jul 27, 2016 9:18 am

First post

Ok, my plan is to build basically a propane fired musket, 36 inch long 1/2 copper pipe as the barrel, and 2 inch pvc chamber, I have an old stun gun...

Last post

Syringe Fuel Metering is your friend, especially for smaller launchers.

I'll be shooting a lead ball instead of a marble.

I'm afraid your muzzle...

7 Replies

6119 Views

Last post by jackssmirkingrevenge
Sat Aug 13, 2016 5:43 am
Maximum PSI of a hairspray explosion

Last post by jackssmirkingrevenge
Replies: 6
by Doombot1 » Thu Jul 07, 2016 3:41 pm

First post

I recently bought a 2ft length of schedule 40 PVC pipe. It is rated at 180 PSI. Is there any possibility at all of this failing as a result of a...

Last post

Your signature is how I one day hope to reproduce.

6 Replies

8803 Views

Last post by jackssmirkingrevenge
Sat Aug 06, 2016 8:13 am
Design help for propane valve

Last post by Futterama
Replies: 5
by Futterama » Thu Feb 18, 2016 8:22 am

First post

Hi forum,

I need to build a propane valve that can be actuated by an RC servo. This means that the range of travel of the controlling surface is...

Last post

Now with servo operation :D

The servo has no problem opening up even with a inlet pressure of 8 bar.

Total weight: 73g. I am very pleased with the...

5 Replies

6134 Views

Last post by Futterama
Wed Aug 03, 2016 3:57 pm
Slow Motion Combustion Video

Last post by ToasT
Replies: 13
by ToasT » Thu Jun 23, 2016 6:02 am

First post

Came across this on youtube.

Several things here, that if not of general interest, could be useful when designing combustion cannons.
Like the...

Last post

Yea i forgot to mention that the effects here are maybe the last few things to optimise to get the best performance. These are still things that you...

13 Replies

13613 Views

Last post by ToasT
Mon Aug 01, 2016 4:50 am
bolt action sniper rifle concept

Last post by Hurricane Arms
Replies: 1
by HobbyEngineer » Tue Apr 26, 2016 4:02 pm

First post

Hi guys
I am new to this forum and need some advice from you experienced guys.
(btw please forgive me my bad english, not a native speaker)
So I want...

Last post

This is incredibly detailed. And I like the general idea but may I suggest a simpler way?

With the right mechanism you don't need shells. Find a way...

1 Replies

3560 Views

Last post by Hurricane Arms
Wed Jul 13, 2016 9:04 am
5 Newbie Questions: Liquid Fuel, Buttstocks, and Operation

Last post by jimmy101
Replies: 3
by Jellydonut » Sat Apr 23, 2016 8:09 pm

First post

Howdy!

Complete newbie here, and I just had some questions about fuels and operation before I start building. I had a Howitzer-style cannon several...

Last post

Here is a quick calc using HGDT. I assumed an 8 barrel and 8 chamber both at 1.5 diameter and a 1.4 oz round (about 40grams). The estimated muzzle...

3 Replies

4275 Views

Last post by jimmy101
Sun Jun 26, 2016 3:17 pm
homemade hydrogen gun from plumbing

Last post by jackssmirkingrevenge
Replies: 6
by keks2033 » Sat Mar 26, 2016 2:21 pm

First post

The camera transmits sound bad, but it was very gromko.HYDROGEN I received chemically, mixed alkali and alyuminiy.Ya afraid to use a small barrel...

Last post

Nice heart shot ;)

6 Replies

6645 Views

Last post by jackssmirkingrevenge
Tue Apr 26, 2016 8:52 pm
Yet another topic begging for help: Metered propane edition

Last post by jackssmirkingrevenge
Replies: 3
by madmarcs » Mon Apr 04, 2016 1:55 pm

First post

Several weeks ago I set out to build my first metered propane cannon and up until actually trying to fire it things were going well. Every system...

Last post

I say this every time but metering fuel with a syringe at atmospheric pressure is also a viable option with less variables.

3 Replies

4241 Views

Last post by jackssmirkingrevenge
Sat Apr 09, 2016 7:18 am
Ebay 5$ ignition combustion

Last post by Futterama
Replies: 8
by wyz2285 » Tue Sep 09, 2014 3:43 pm

First post

Bought few of these after someone posted the link here.
One of them arrived and wanted to test it out. Used few airsoft parts what was in my trash...

Last post

Hi, sorry for bringing up an old thread. I bought 3 of these back in October 2015 on ebay from different sellers. 2 of them are of the size 24 x 65mm...

8 Replies

9688 Views

Last post by Futterama
Fri Apr 01, 2016 6:29 am
Spudgun won't ignite even with blowing into chamber

Last post by matti
Replies: 6
by Tijn_416cs » Fri Mar 04, 2016 10:48 am

First post

My friend and I recently made a spudgun around 4 feet long give or take, using a little piezo electric ignitor from a lighter, we tried the...

Last post

Thanks Matti, I am switching to pneumatics for the bb gun, as for my friend, his cannon almost exploded yesterday and he got some minor burns on his...

6 Replies

7808 Views

Last post by matti
Sun Mar 06, 2016 3:08 pm
Noise Cannon for gunfire imitation

Last post by Digital941

by Digital941 » Sat Feb 27, 2016 5:48 am

Noise Cannon for gunfire imitation.

Hi all, sorry for posting another thread on a topic that is currently in discussion, but I would like to do it...

0 Replies

7286 Views

Last post by Digital941
Sat Feb 27, 2016 5:48 am
Oxy/propane combustion

Last post by matti
Replies: 3
by matti » Thu Feb 04, 2016 4:58 am

First post

Hey !

quick question.. Do any of you remember if there is cannons here that work with atmospheric oxy/propane mix ? (open chamber, not hybrids).
I...

Last post

I don't have any links offhand, but I did build one back in '07, before I joined Spudfiles. The maximum combustion pressure in such a mix can be...

3 Replies

5277 Views

Last post by matti
Fri Feb 05, 2016 3:19 am
Anyone going to try carbide this year?

Last post by Rahim17
Replies: 4
by BowerR64 » Thu Jun 25, 2015 3:45 am

First post

I really enjoyed the thunder mug design and i think i shot it the most last year being so simple and portable but still has a decent bang for what it...

Last post

I don't think that's very practical. I believe it's made in a carbon arc
furnace at very high temperatures. Just from memory I think it's made by...

4 Replies

7357 Views

Last post by Rahim17
Tue Feb 02, 2016 2:05 am
Chamber and barrel ratio

Last post by jimmy101
Replies: 6
by topelitemarine » Wed Dec 02, 2015 10:57 am

First post

What is the best ratio of combustion cannon? I did some research on forum and some said 80% of chamber and 20% barrel? is there any differences...

Last post

Hadn't it been established that beyond a certain barrel length for a given chamber performance actually begins to go down? No, BurntLatke showed the...

6 Replies

8784 Views

Last post by jimmy101
Tue Dec 08, 2015 3:06 am
stun gun not working, should I change the battery?

Last post by jimmy101
Replies: 19
by jsefcik » Tue Apr 24, 2012 5:29 pm
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First post

i ordered a stunggun for my big combustion cannon, its 100,000 volts, i had the old wires still on my gun and the screw i have inside there isnt much...

Last post

Or, another likely problem is that the internal gap is cooked. Hook a piece of wire to one of the electrodes and bring it near the other and try to...
19 Replies

15066 Views

Last post by jimmy101
Tue Nov 17, 2015 12:44 pm
worked twice now nothing

Last post by jackssmirkingrevenge
Replies: 5
by 3percenter » Mon Aug 31, 2015 5:26 am

First post

I recently built a spud/tennis ball cannon out of steel pipe and a propane tank, and after a few failedattempts to fire it with propane, I vented my...

Last post

an Oz of 87 octane

The best question is how exactly are you adding that ounce. As Fnord suggested, some kind of atomizing spray bottle is your best...

5 Replies

5896 Views

Last post by jackssmirkingrevenge
Sun Oct 04, 2015 7:41 am
fuel question H2 O2 or Hair spray

Last post by jimmy101
Replies: 11
by topelitemarine » Mon Sep 21, 2015 3:16 am

First post

H2 o2 has more explosive power or hair spray? can you compress h2o2 with household item? what kind of fuel do you guys use? :)

Last post

Not however the same as H2O2, which would be hydrogen peroxide.

... which is indeed itself used as a rocket fuel. With the right catalyst, its...

11 Replies

11053 Views

Last post by jimmy101
Sat Sep 26, 2015 12:11 pm
Combustion Guns Made from Trash

Last post by cowscankill

by cowscankill » Fri Sep 25, 2015 2:14 pm

So easy a cave man could do it, or something.

These are two designs I made from scraps of whatever I had lying around. This is a pretty old video...

0 Replies

6682 Views

Last post by cowscankill
Fri Sep 25, 2015 2:14 pm

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