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

631992 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

213207 Views

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

Topics

A few questions before starting the second gun!

Last post by saefroch
Replies: 1
by Imkindofabigdeal » Sun Nov 21, 2010 10:55 am

First post

Hey everyone,
I have a few questions before starting my second gun if thats OK:
1. Are vent holes on the combustion chamber any good? On my first...

Last post

The vent holes are probably losing you power, since some of your combustion gases are escaping out of them, instead of propelling your ammo down the...

1 Replies

1276 Views

Last post by saefroch
Sun Nov 21, 2010 11:47 am
Circuit Diagram for Electronic Ignition?

Last post by jimmy101
Replies: 19
by Mountain Storm » Sun Oct 24, 2010 10:09 am
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First post

Anyone have a link or a diagram so I can build my own igniter? I just received one I ordered from eBay and it's that typical potted waterproof AAA...

Last post

An alternative chopper (to a flyback or say a 555 based one) is to use a standard automotive relay wired as a buzz coil . Add an automotive ignition...
19 Replies

5821 Views

Last post by jimmy101
Fri Nov 12, 2010 4:04 pm
Spark Igniter

Last post by Joined
Replies: 5
by Joined » Mon Mar 22, 2010 4:18 pm

First post

Hi to all on this forum :)
I'm new there and i'm sorry for my english but i'm italian.

I'm trying to build my 2nd combustion cannon and i'm...

Last post

Fortunatamente per me, io sono americano e può ottenere da queste parti molto facilmente. Il accenditore si prevede l'acquisto da eBay sembra che...

5 Replies

4223 Views

Last post by Joined
Sun Nov 07, 2010 3:35 pm
Most common mistakes on first advanced combustion cannon?

Last post by Fnord
Replies: 18
by chubbylad13 » Wed Nov 03, 2010 2:14 pm
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Hello, im about to build my first advanced propane conbustion cannon. Im am planning on going with a under over design. Before I start building I was...

Last post

^ Well, you've been away for a bit :)

I think the generally accepted view is a ~0.8:1 ratio will give you the most power for a specific chamber...
18 Replies

8348 Views

Last post by Fnord
Sun Nov 07, 2010 2:02 pm
First Cannon, love it, but want better.

Last post by SpudFarm
Replies: 6
by Imkindofabigdeal » Sat Nov 06, 2010 1:37 pm

First post

Hey everyone,
First time post, but have pretty good knowledge of cannons (read a ton before I built my first one). I have a few questions:

1. How do...

Last post

Chamber fans
Chamber to barrel ratios
Fuels
Fuel meters

Hope this helps :)

6 Replies

2986 Views

Last post by SpudFarm
Sat Nov 06, 2010 6:53 pm
Do i need oxygen?

Last post by wyz2285
Replies: 15
by wyz2285 » Tue Nov 02, 2010 4:18 pm
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First post

sorry if some body have already asked a same question :? But i have to solve this problem fast: i'm building a combustion rifle, the chamber size is...

Last post

Thanks for the advise :) i will try to corporate a syringe on it, but if the power doesn't satisfies me i will inject some oxygen :D
i used a...
15 Replies

6216 Views

Last post by wyz2285
Sat Nov 06, 2010 4:05 pm
Advantage of multiple ignition points?

Last post by Pete Zaria
Replies: 7
by Mr. Sir » Sat Oct 30, 2010 4:05 am

First post

After searching through old topics, it seems that there is no definitive answer regarding the possible performance increase of multiple spark gaps...

Last post

I believe the primary reason for multiple ignition points is to create multiple flame fronts inside the chamber during ignition, which theoretically...

7 Replies

4054 Views

Last post by Pete Zaria
Thu Nov 04, 2010 12:39 am
Say hello to my little friend

Last post by Technician1002
Replies: 4
by metalmeltr » Tue Nov 02, 2010 9:45 am

First post

Camber 4x10
barrel 2 x5'.
meter pipe 3/8 running direct tank pressure.

Last post

The Gimp is a free full featured photo editor. It can do most things you would want to do including crop, resize, adjust color, brightness, add text,...

4 Replies

3178 Views

Last post by Technician1002
Tue Nov 02, 2010 11:16 am
bushing vs reduction piece

Last post by Gaderelguitarist
Replies: 3
by ste hughes » Tue Nov 02, 2010 6:25 am

First post

hi guys

building my first MAPP cannon

i have 1 cannon thats powered by hairspray which is awesome but the way i went down from 4 to 2 was pieces of...

Last post

My two working combustions actually utilize wooden plugs to seal off the chamber. If done correctly, it can be a completely reliable build. This...

3 Replies

1491 Views

Last post by Gaderelguitarist
Tue Nov 02, 2010 10:48 am
BL-417

Last post by jackssmirkingrevenge
Replies: 35
by jagerbond » Sun May 17, 2009 10:05 am
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First post

combustion GB launcher based on the 415. Check out the custom flange to help support the schedule 80 /SDR-21/ chamber intersection. The Chamber was...

Last post

thats not a steyr

its a daystate

*cough* ;)
35 Replies

19396 Views

Last post by jackssmirkingrevenge
Tue Nov 02, 2010 7:16 am
Peizo, sparker or 9V?

Last post by jackssmirkingrevenge
Replies: 6
by dan-27 » Thu Oct 28, 2010 4:57 am

First post

Hi there. I'm having some issues with my spudgun (My first!)

I started by using a peizo sparker from a gas fire, this worked really well arcing...

Last post

Good man, have a read through the and if you need further advice just ask if the search feature doesn't satisfy your request.

6 Replies

2509 Views

Last post by jackssmirkingrevenge
Fri Oct 29, 2010 6:01 am
Spud Chucker 9000

Last post by Mountain Storm
Replies: 7
by Mountain Storm » Sun Oct 17, 2010 9:00 pm

First post

My first spud gun, I went low budget and used 1.5 on the barrel and 3 on the chamber. Piezoelectric igniter in a rude aluminum pistol grip. Been...

Last post

I've made some that are rounded using a large round over router bit and drilled out in the back leaving a 3/8 wall. Those work a lot better. The...

7 Replies

5252 Views

Last post by Mountain Storm
Wed Oct 27, 2010 4:56 pm
Catastrophic failure

Last post by Mountain Storm
Replies: 17
by Mountain Storm » Sun Oct 24, 2010 5:30 pm
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I wondered what part of the Spud Chucker would fail and it was the 1.5 to 3 flush fit adapter that blew out finally. Right when I was testing a...

Last post

One other possiblity of a cause of failure. The joint could have become fatigued and cracked from being dropped or sat on. The collapse of one of the...
17 Replies

6675 Views

Last post by Mountain Storm
Tue Oct 26, 2010 6:19 am
Decisions decisions!

Last post by MadPiper2.0
Replies: 2
by MadPiper2.0 » Tue Oct 19, 2010 7:23 am

First post

So I am working on a project, obviously, and I have just really gotten into the world of electrical. Honest, I have always been interested in it but...

Last post

Just the type of answer I was looking for. Thanks for untangling the wires for me!

2 Replies

1827 Views

Last post by MadPiper2.0
Tue Oct 19, 2010 12:59 pm
Winter Project

Last post by motorfixer1
Replies: 2
by motorfixer1 » Mon Oct 18, 2010 4:48 pm

First post

With the arrival of cold weather once again, I am getting a new combustion launcher together. Possibly something for cold weather use. I was thinging...

Last post

The seam looks to be resistance welded as far as I can tell. I buy the heaviest wall stuff I can get because it lasts a few more winters than the...

2 Replies

1301 Views

Last post by motorfixer1
Tue Oct 19, 2010 6:21 am
A quick few questions..

Last post by Technician1002
Replies: 1
by bobsta » Sun Oct 17, 2010 7:11 am

First post

Hey guys,

I have a couple of probably simple questions..

As you will notice I have uploaded a picture of DirtyDan's combustion cannon, i just have...

Last post

You are new. Search Propane Meter and it's function should show the reason for 2 valves. Between 1 and 2 is a delivery hose. Between 2 and 3 is a...

1 Replies

1046 Views

Last post by Technician1002
Sun Oct 17, 2010 9:57 am
6.3L Wogglecannon

Last post by mark.f
Replies: 12
by Velocity » Sat Aug 21, 2010 8:18 pm

First post

It’s been quite a while since I posted anything (seems like around two years since I posted any type of cannon). Though I’ve made the occasional...

Last post

Hey, Velocity finally built a combustion and I MISSED IT???

Sorry Velocity, I've actually been waiting for this cannon for quite some time but, like...

12 Replies

8054 Views

Last post by mark.f
Sun Oct 17, 2010 9:53 am
Couple O' Questions

Last post by Fnord
Replies: 18
by Grignacke » Sun Oct 03, 2010 7:09 pm
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First post

Hey guys!
I've built two spud guns, a spray 'n' pray and a one that takes metered mapp / propane- much fun :D
I'm interested in building a...

Last post

Grignacke,
There's no reason to buy camlocks from mcmaster.
Use mcmaster for hard-to-find stuff or when you need a bunch of different stuff in one...
18 Replies

7686 Views

Last post by Fnord
Mon Oct 11, 2010 3:12 pm
Three-Way Valve Fuel Meter?

Last post by Technician1002
Replies: 5
by kmuret » Sun Oct 10, 2010 5:09 pm

First post

So, I had an idea, but couldn't find any posts that mentioned it. Forgive me if this is not a new idea... I am throwing this out in hopes of...

Last post

A difficulty with many 3 way valves is the size of the port in the middle. With a large port, many 3 way valves open all ports at 45 degrees instead...

5 Replies

3337 Views

Last post by Technician1002
Sun Oct 10, 2010 9:20 pm
spudgun life preserver?

Last post by Technician1002
Replies: 7
by jackssmirkingrevenge » Tue Oct 05, 2010 11:26 am

First post

Longreach Buoyancy Deployment System

From this description :

The propulsion system uses a low yield butane-oxygen mix propelling the device to...

Last post

LOL, They missed it in the reflections in the rendering.

7 Replies

1824 Views

Last post by Technician1002
Tue Oct 05, 2010 12:00 pm
Building a new cannon

Last post by Technician1002
Replies: 15
by mcole254 » Sun Oct 03, 2010 4:26 pm
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First post

I was browsing for some parts for my new spudgun I noticed some 6in pvc. The only problem is that it's SCH 35, would that be sufficient for a...

Last post

I have pressure tested 4 inch cellular core ABS to 100 PSI with no problems. Someday I plan to hydrostatic test a piece to failure using a grease gun...
15 Replies

7134 Views

Last post by Technician1002
Mon Oct 04, 2010 9:25 pm
igniter info.

Last post by jimmy101
Replies: 3
by bobby38 » Sat Oct 02, 2010 4:38 pm

First post

i`ve been having the same problem with my igniter. i just built this spug gun this week and have fired only three times but the bbq ignir\ter arks to...

Last post

If you are using a generic BBQ piezo then it'll work fine for a single spark gap. No reason to make it more complicated.

1/4 is too big, 1/8 or a...

3 Replies

1892 Views

Last post by jimmy101
Mon Oct 04, 2010 4:56 pm
Propane tank volume

Last post by Technician1002
Replies: 2
by metalmeltr » Sun Oct 03, 2010 6:33 am

First post

Does anyone know, or can you find the volume in cubic inches of a 20lb propane tank, iwant to use it as a combustion chamber in a tennis ball/ pop...

Last post

The volume is stamped on the handle with the test date on USA tanks. Look for the WC number. WC stands for Water Capacity. If filled full of water,...

2 Replies

2467 Views

Last post by Technician1002
Sun Oct 03, 2010 8:50 am
RPG-2.0-P

Last post by irickedit
Replies: 10
by irickedit » Thu Sep 23, 2010 2:07 pm

First post

Here's a few pics of my second spud gun, ready for expert reviews.

Last post

I've got the sights installed now, I'll get some more pics posted soon. Next mod is The Mount, after hearing that thing should be mounted a few...

10 Replies

4836 Views

Last post by irickedit
Fri Oct 01, 2010 3:36 pm
Ultimatespudgun.com ignitor question

Last post by Technician1002
Replies: 10
by supercannons » Mon Sep 27, 2010 2:59 am

First post

referring to this ignition:

I was just wondering how the coil could generate enough of a spark from the 9volt battery, does it act like a...

Last post

i think you guys are gust over exasperating, from my opinion it wouldn't that hard to build all you have to do is take a 9v battery amp it up to a...

10 Replies

3704 Views

Last post by Technician1002
Tue Sep 28, 2010 7:22 pm

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