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

944922 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...

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great job how can i help the fourms
45 Replies

305355 Views

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

Topics

PVC conduit

Last post by mattyzip77
Replies: 12
by boyce123 » Sun Jun 17, 2012 9:00 pm

First post

i just recently made a barrel out of a piece of 2.5 in pvc wire conduit (it was the only 2.5 in pvc that i could find without paying alot of money...

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Pvc doesnt scare me at all. As long as you follow the guidelines and never go beyond the maximum pressure and solvent weld properly, you will never...

12 Replies

3689 Views

Last post by mattyzip77
Wed Jun 20, 2012 1:45 pm
Building a Better (Combustion) Spudgun

Last post by jimmy101
Replies: 23
by DYI » Fri Jun 08, 2012 5:33 pm
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To put it bluntly, the development of advanced combustion launchers peaked several years ago. In terms of ease of construction and ease of use, this...

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The problem is what wyz2285 said, the gases cool down and the pressure drops.

Note that the drop in temperature (hence pressure) is very fast. After...
23 Replies

16412 Views

Last post by jimmy101
Wed Jun 20, 2012 1:12 pm
mini combustion pistol

Last post by boyce123
Replies: 2
by boyce123 » Tue Jun 19, 2012 1:11 pm

First post

This was a cannon i decided to throw together out of random spare parts. I didn't have any fittings, and didn't want to go buy any, so i made a...

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my last quote seems like a good candidate for that thread... if applied to a reasonably powerful cannon. I should give the thing more credit as far...

2 Replies

2070 Views

Last post by boyce123
Tue Jun 19, 2012 6:21 pm
SCH. 40 vs ABS

Last post by Technician1002
Replies: 17
by 8tonsemi » Thu May 24, 2012 1:45 pm
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I want your opinion on what you think is better for an advanced spud gun. Run of propane or mapp gas. Sorry this is kind of a nooby question. :lol:...

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Glad you brought that up.. It is due again.

and PERIODIC PRESSURE TESTING.

Yes, the black one IS a DWV cell core cannon.
17 Replies

7674 Views

Last post by Technician1002
Tue Jun 05, 2012 4:01 pm
Having trouble getting a tennis ball mortar to shoot

Last post by battlelava
Replies: 5
by Xenophile » Sun Jun 03, 2012 5:12 pm

First post

Hey guys. I have recently constructed a tennis ball mortar out of 3 diameter PVC pipe with two pringles cans lining the inside to act as baffles as...

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The baffles are to hold the tennis ball and prevent if from dropping all the way to the bottom

One simple screw will do that without filling the...

5 Replies

5929 Views

Last post by battlelava
Tue Jun 05, 2012 9:04 am
My introduction to propane

Last post by boyce123
Replies: 21
by boyce123 » Fri May 25, 2012 4:20 pm
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I have just discovered this website, and am dissappointed i hadn't found it before. I'm only 16, so excuse my inexperience. This is the second cannon...

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i'm not concerned that the cannon will explode, but ddt always has a potential of occuring, i might do some tests with bedliner and other materials...
21 Replies

13419 Views

Last post by boyce123
Wed May 30, 2012 7:57 am
My first cannon

Last post by boyce123
Replies: 4
by boyce123 » Fri May 25, 2012 5:49 pm

First post

I made this cannon a couple years ago with my dad (i was 14 at the time). It is a very basic spray and pray design with a bbq igniter. It shoots...

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i had just walked out to take that picture of the plywood, and it had rained like a monsoon for about half an hour. The plywood wasn't that old and...

4 Replies

2836 Views

Last post by boyce123
Fri May 25, 2012 7:24 pm
winterizing spud guns

Last post by Labtecpower
Replies: 20
by Bowman » Thu May 10, 2012 6:20 pm
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I heard somewhere that spud guns tend to malfunction or not work so I almost immediately tried to figure out a way to winterize a basic potato...

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Heh give me a combi of that girl and the vat the's hgammerinh into :D
20 Replies

8806 Views

Last post by Labtecpower
Fri May 25, 2012 5:04 pm
Converting a M-8 to a Spudgun

Last post by burke_a_lot
Replies: 8
by burke_a_lot » Thu May 24, 2012 1:48 am

First post

Will post more info and pics over the next couple of weeks....

Replacing the barrel and reinforcing the seals....

Changing to RTF ignition, making...

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Fine.... it's a agricultural scare gun that uses gas to create a 145DB bang to simulate a double barrel shotgun....

8 Replies

3733 Views

Last post by burke_a_lot
Fri May 25, 2012 7:05 am
shock collar for remote testing?

Last post by jackssmirkingrevenge
Replies: 14
by Hashbrowwns 4flip » Tue May 15, 2012 4:18 pm

First post

I was thinking I might try using my dogs training shock collar to remote fire my spud gun for testing. Has anyone ever tried this?

Last post

That was meant as a pop at MrC ;)

Come on, media! videos, pictures, show us :D

14 Replies

3841 Views

Last post by jackssmirkingrevenge
Thu May 24, 2012 10:15 pm
newbie planning to go all out :-)

Last post by jackssmirkingrevenge
Replies: 112
by natas » Thu Mar 01, 2012 4:01 am
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Hi there spudders, first of all i would like to thank this forum for a extremely informal place to be :-)
Im a guy from Norway, that just found...

Last post

Look at the curve for propane:

Temperature certainly has some effect ;)
112 Replies

34222 Views

Last post by jackssmirkingrevenge
Thu May 24, 2012 4:23 pm
Sound levels

Last post by battlelava
Replies: 95
by battlelava » Wed Apr 18, 2012 3:37 pm
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First post

So I just finished my 2 mortar, and I wanted to do some testing on it before i brought it to my field. Only problem is i have no clue on how loud...

Last post

Do you have a stem removal tool for the schrader?

Yes, several. Visit an auto parts store. They come in several styles including valve caps with a...
95 Replies

29581 Views

Last post by battlelava
Thu May 17, 2012 8:49 pm
mapp gas shortage

Last post by jimmy101
Replies: 6
by Hashbrowwns 4flip » Wed May 09, 2012 8:05 pm

First post

I was reading posts and somebody had mentioned a mysterious mapp gas shortage. Evidently the major mapp gas supplier has issued a recall for faulty...

Last post

so no difference between MAP and MAPP ?
MAPP is a trademark, MAP isn't.

According to Wikipedia, MAPP production was discontinued in 2008.

The...

6 Replies

3717 Views

Last post by jimmy101
Wed May 16, 2012 1:45 pm
combustion help please

Last post by jimmy101
Replies: 15
by beastmode986 » Fri May 11, 2012 4:15 pm
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well i have a regular old combustion and i use hairspray as a propellant but i want to make it nicer. now i cant spend alot of money because im...

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Natas

That's pretty good approach but will end up being kind of expensive. You need a regulator and that alone is a significant cost.

That's what's...
15 Replies

6055 Views

Last post by jimmy101
Tue May 15, 2012 3:01 pm
zombie survival gun

Last post by RamboNucke
Replies: 18
by RamboNucke » Mon Mar 12, 2012 2:20 pm
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Here's my new special zombie survival spudgun. It fires 20mm polypropylene projectiles with a steel penetrator. The barrel is 28mm inner diameter so...

Last post

The N2O is from ammonium nitrate. It displaces water. When the bottle is full i get rid of the few drops of water and add about a soup spoon of...
18 Replies

7733 Views

Last post by RamboNucke
Tue May 15, 2012 7:02 am
Basic potato rifle

Last post by cfb_rolley
Replies: 17
by cfb_rolley » Sun Apr 29, 2012 2:35 am
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So I got my newest basic combustion rifle in to a working state today. 760mL chamber forms the stock, multiple barrels, peizo ignition housed inside...

Last post

Thanks, I think this is probably my best effort at building a cannon so far haha!
17 Replies

8988 Views

Last post by cfb_rolley
Sun May 06, 2012 4:40 pm
Right C:B Ratio For Aerosol

Last post by rustlerdude987
Replies: 9
by rustlerdude987 » Tue May 01, 2012 9:22 pm

First post

like the title says what is the correct C:B ratio for a Aerosol like engine starter i keep hearing .8:1 is then 1.5:1 is correct. Which one is it?

Last post

perfect thanks for the help guys!

9 Replies

3599 Views

Last post by rustlerdude987
Sat May 05, 2012 7:22 pm
My spark is unreliable.

Last post by jimmy101
Replies: 14
by Kdmann64 » Wed Feb 01, 2012 9:20 pm

First post

I have a standard gas grill igniter. First shot or two are always good, then the spark gets very weak. I'm using starter fluid as fuel. What should I...

Last post

You should try an electric grill sparker they are more reliable.

then a stungun? i think not!!

read up this

look at this website, this guy is...

14 Replies

5654 Views

Last post by jimmy101
Sat May 05, 2012 12:43 pm
How can these ratios be right?

Last post by DYI
Replies: 5
by djwilliams0822 » Fri May 04, 2012 12:06 pm

First post

I am wondering why do you think a 1.5:1 ratio will make more power than say a 4:1? I have a 4:1 and it has a lot of power. My thinking is the more...

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Jimmy covered essentially all the relevant points.

It also needs to be ascertained whether the poster is looking at optimal CB for a given barrel,...

5 Replies

2499 Views

Last post by DYI
Fri May 04, 2012 3:26 pm
Spark Plugs

Last post by Bowman
Replies: 27
by Bowman » Tue May 01, 2012 4:25 pm
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Well, I'm still in the design process of making a Semi-Automatic combustion launcher. The original design used a piezoelectric BBQ ignition system...

Last post

if u want easy to install. id say this one is really easy :-)

There aren't any electrodes so I assume you use these:

Also, I found something...
27 Replies

12580 Views

Last post by Bowman
Thu May 03, 2012 5:41 pm
chamber radius caomparisons?

Last post by Fnord
Replies: 3
by Hashbrowwns 4flip » Wed May 02, 2012 5:23 pm

First post

Hi guys I am a noob and I did try and find answers before I asked this but since I was un successful has anyone done or notice any difference between...

Last post

Unless your chamber is unusually long and skinny/short and fat, you won't notice the difference, especially if you add a chamber fan. If in doubt,...

3 Replies

1771 Views

Last post by Fnord
Wed May 02, 2012 5:58 pm
Is it a nono to discuss silencers on the forum ?

Last post by jackssmirkingrevenge
Replies: 3
by natas » Fri Apr 27, 2012 8:35 pm

First post

im just asking before i start a tread about silencers, since i know its illegal in some states in usa.

Last post

Just make sure your baffles are aligned :D

3 Replies

2272 Views

Last post by jackssmirkingrevenge
Mon Apr 30, 2012 12:53 am
Barrel To Chamber Ratio

Last post by natas
Replies: 2
by rustlerdude987 » Wed Apr 25, 2012 10:18 am

First post

i was wondering if some one could check my chamber to volume ratio. my barrel is 2.5 inch by 48 inches and my chamber is 3 inch by 24 inches. i got...

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go to burntlake.com they have a wery usefull calculator for cb ratios

2 Replies

1731 Views

Last post by natas
Wed Apr 25, 2012 10:43 am
Semi-Automatic Combustion Cannon Concept

Last post by Bowman
Replies: 20
by Bowman » Sat Apr 14, 2012 8:37 pm
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Well I'm new to the world of spud guns so I am not really sure of what would be the proper materials for a build such as this. I've been toying...

Last post

I was thinking about just mixing the air and propane before I put it in the gun. Then building a custom tank on the gun itself that has a fan in it...
20 Replies

10013 Views

Last post by Bowman
Tue Apr 17, 2012 10:18 pm
authentic mortar

Last post by battlelava
Replies: 18
by battlelava » Wed Feb 29, 2012 8:12 pm
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I've been looking at a replica mortar system but I have no idea were to start with a drop fire system. Any ideas

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Found a 2 slide in Female threaded output and a plug :O so im going to make it a mortar/booby trap for airsoft workin out some numbers in HGDT now...
18 Replies

6797 Views

Last post by battlelava
Sun Apr 15, 2012 3:42 pm

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