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...

Last post

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

630118 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

212851 Views

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

Topics

Barrel to chamber size?

Last post by mattyzip77
Replies: 7
by KS-collector » Thu Sep 22, 2011 3:44 pm

First post

Im no math wiz, so can anyone double check this ratio for me? Barrel is 3 inches wide, 3 ft long. Chamber is 6 inches wide, 15 inches long. That...

Last post

The wiki knows all!! Also, look at other members c b ratio. I would say your close enough. Also try running different figures through GGDT. Welcome...

7 Replies

3049 Views

Last post by mattyzip77
Thu Sep 22, 2011 5:51 pm
Is it a water bottle or a gun?

Last post by pneumaticcannons
Replies: 13
by pneumaticcannons » Sat Aug 06, 2011 8:40 pm

First post

This is my first combustion cannon and I thought, why make it the same as the rest when it can be unique. And given the freedom of desighn with...

Last post

Thats pretty cool. Its like a 1x flap-piston hybrid.
I guess it is. I never actually thought of it that way. i didn't even know the what a flap...

13 Replies

7309 Views

Last post by pneumaticcannons
Sun Sep 11, 2011 5:19 am
The PPK-7000

Last post by jhalek90
Replies: 13
by ovie707 » Fri Aug 12, 2011 7:00 pm

First post

Hey Spudfiles, I've been a member on this website for quite some time now, but I'm just now getting around to building and posting a cannon. I'm so...

Last post

i found krylon fusion to be worth every penny for painting PVC pipe.

Rustoleum works as well, but it tends to scrape off easier than kyrlon fusion...

13 Replies

6965 Views

Last post by jhalek90
Fri Sep 09, 2011 6:47 pm
3/2 way valve for fuel meter

Last post by POLAND_SPUD
Replies: 2
by jakethebeast » Thu Sep 08, 2011 9:00 am

First post

Hi! just found my old spray and pray spudgun, its like 4 years old but it has been on my warm workshop so i think its still safe to use :) no im...

Last post

It looks like a direct acting valve and it has all 3 ports threaded... that means it is universal so it can be either normally open or normally...

2 Replies

1504 Views

Last post by POLAND_SPUD
Thu Sep 08, 2011 10:16 am
A couple of (newbish?) questions

Last post by Crna Legija
Replies: 13
by Xalexalex » Sun Aug 28, 2011 7:10 am

First post

Hello everyone!
I'm planning on building my first spud cannon. Wanting to do something more advanced than a plain spray-and-pray, I began to do some...

Last post

I'll check the other threads to get some inspirations =)
Thank you all!

ahhh finally :D

13 Replies

3992 Views

Last post by Crna Legija
Mon Aug 29, 2011 2:14 am
my second cannon

Last post by vblock
Replies: 16
by vblock » Tue Apr 19, 2011 9:22 pm
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Hey everybody, this is my new cannon. Im still deciding on a name though.

The Specs are.
The chamber. 4 inch diameter, solid core abs. 24 long....

Last post

i like your name for the cannon Mattyzip77 sounds pretty siick,
16 Replies

7369 Views

Last post by vblock
Thu Aug 25, 2011 8:11 pm
My first, dangerous, spudgun

Last post by Crna Legija
Replies: 5
by Tobin » Sat Jun 18, 2011 9:23 am

First post

This was the first gun, ive made it togheter with a friend. At the beginning it was just a ordinary spray-and-pray. But after som time i added a...

Last post

Nice work there bud keep it
Up for you u get a cookie and a dollar

You should read the date before posting to make sure your not kicking up a dead...

5 Replies

4302 Views

Last post by Crna Legija
Wed Aug 24, 2011 1:54 am
Flow restriction

Last post by jsefcik
Replies: 12
by jsefcik » Fri Aug 19, 2011 3:41 pm

First post

I would like to shoot tennis balls out of my air cannon,
But I have one problem which is, I have a female 1 1/2 adapter if i go up to 2 1/2 for my...

Last post

I think ill wait, money would be better used in my piston cannon

12 Replies

3198 Views

Last post by jsefcik
Sat Aug 20, 2011 1:18 am
Third cannon help.

Last post by Bias_P11
Replies: 17
by frozenveinz » Thu Aug 18, 2011 1:20 am
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Okay so I am currently in the process of making my third cannon. My first was the basic potato cannon with hairspray and a piezio bbq igniter, then I...

Last post

Oh and spuds are low density projectiles. A high density projectile such as a magnetite slug needs a slightly higher C:B ratio. Use a sabot for stuff...
17 Replies

6949 Views

Last post by Bias_P11
Thu Aug 18, 2011 11:01 pm
Disconnecting leaky regulator

Last post by ovie707
Replies: 5
by ovie707 » Sun Aug 14, 2011 7:32 pm

First post

Hey guys I was wondering if any of you has had a problem with the regulator that hooks up to the propane leaking. I'm pretty sure its not the...

Last post

Also, I was wondering If it was a problem with the regulator for it to be leaking like that. Should i get a new one or is there a way to fix it?

5 Replies

1994 Views

Last post by ovie707
Thu Aug 18, 2011 2:35 pm
Cheap Spudgun Ignition

Last post by Mr.Tallahassee
Replies: 12
by Mr.Tallahassee » Sun Jul 17, 2011 9:57 pm

First post

I have come up with an ignition system for combustion OR hybrid cannons. It's made from an electric fly swatter and an ignition coil from a car. If...

Last post

Yeah. I thought about the HV output on the racket and looked over at my bank of ignition coils. :idea: Such fun toys they can be.

12 Replies

4589 Views

Last post by Mr.Tallahassee
Mon Aug 15, 2011 8:14 pm
Camera Flash Circuit questions

Last post by Hotwired
Replies: 20
by saefroch » Mon Jul 25, 2011 9:50 am
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First post

I know I've started threads like this before, but my questions are rather different this time.

1) I rewired my flash circuit, but now it isn't...

Last post

@hotwired, where did you get that potted coil? what size capacitor are you using instead of the main photoflash one? And because it's semi-relevent...
20 Replies

7112 Views

Last post by Hotwired
Fri Aug 05, 2011 8:34 pm
(Kinda)New Spudgunner

Last post by Enferno8
Replies: 17
by Enferno8 » Sun Jul 31, 2011 10:45 pm
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First post

Hey everyone, I'm new here and have a few questions I couldn't find answers to right off hand. So. My newest setup is a 7.5 ft. MAPP gas monster....

Last post

Oops, that was supposed to say it WAS shooting a max shot of 310 yards, not 410. About a 100 yard increase in max distance after all the leaks were...
17 Replies

3904 Views

Last post by Enferno8
Thu Aug 04, 2011 6:16 pm
Mixing Fan Performance

Last post by jsefcik

by jsefcik » Tue Aug 02, 2011 9:21 pm

The other day I was reading about how chamber fans increase power, and distance. Therefore I thought I would give it a try and gathered stuff around...

0 Replies

4460 Views

Last post by jsefcik
Tue Aug 02, 2011 9:21 pm
Propane meter

Last post by Technician1002
Replies: 1
by jsefcik » Tue Jul 19, 2011 4:59 pm

First post

After doing all the math for how long my propane meter,

I did an example ,
If I had a 15 inch piece of 4 inch pipe
using the volume formula

Then...

Last post

Gas compresses. If you make the pipe that size you will need to fill with Propane to 2 atm absolute pressure so whem injected into the chamber tt...

1 Replies

1242 Views

Last post by Technician1002
Tue Jul 19, 2011 6:09 pm
Mixing Fan Needed?

Last post by Moonbogg
Replies: 5
by jsefcik » Mon Jul 18, 2011 7:37 pm

First post

I have seen mutiple guns with mixing fans, I have seen multiple guns with out them and both guns work?

Do you need them or just make it easier for...

Last post

My first combustion has everything just about right, except it didn't have a fan. I made another one just like it but added a fan and I absolutely...

5 Replies

2320 Views

Last post by Moonbogg
Mon Jul 18, 2011 11:56 pm
Quick Question

Last post by Technician1002
Replies: 5
by nimane9 » Fri Jul 15, 2011 10:13 pm

First post

Hey, I'm new to the forums and I have a quick question. Theoretically could I use the same designs but different barrel sizes to make a tennis ball...

Last post

I have a couple of launchers with a variety of screw on barrels. Tennis balls is one of the sizes.

5 Replies

1985 Views

Last post by Technician1002
Fri Jul 15, 2011 10:58 pm
two mini's

Last post by jsefcik
Replies: 13
by jook13 » Wed Feb 06, 2008 3:05 am

First post

My brother and I each built a mini last weekend for fun. they should be self explanatory from the pictures. they are extremely powerful, I put a...

Last post

Its funnny, i made one like that one time way before i really got into spudguns. I sprayed carb cleaner into it, blew up into a million pieces was...

13 Replies

7275 Views

Last post by jsefcik
Mon Jul 11, 2011 11:33 am
M79 Thumper help

Last post by eXodus31337
Replies: 16
by eXodus31337 » Wed Apr 27, 2011 10:55 pm
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This is my first attempt at making a potato cannon. Esthetically, it's coming up nicely. What I'm having trouble with is the combustion. I understand...

Last post

although the front sight might get in the way when feeding potatoes. or not if i use another tube at load time...

i'll give it a try in balsa wood!
16 Replies

6965 Views

Last post by eXodus31337
Sat Jul 09, 2011 9:56 am
Combustion rifle.

Last post by warhead052
Replies: 5
by warhead052 » Thu Jul 07, 2011 4:48 pm

First post

My first combustion cannon, which shoots airsoft bbs pretty fast. Chamber is 3/4 pvc, and about 10 inches long. Butane is the main fuel. Here are...

Last post

Yeah it is, same one from my sprinkler valve rifle. I have had other designs on it, but this on looks the best. I just need to get to work on a 1/2...

5 Replies

4321 Views

Last post by warhead052
Fri Jul 08, 2011 8:28 am
First Good combustion (Update New Pics!)

Last post by mattyzip77
Replies: 7
by NECROMANCER » Fri Feb 15, 2008 9:09 pm

First post

Well im a new member, and i just built my good combustion spud gun.
Haven't fired any potatos yet but i will soon.Its very basic. Fires 1 1/2 nurf...

Last post

Nice, gun, very clean and simple, and I like the ignitor as well. I was going to try one on my first combustion, but wasnt sure if it woulda worked....

7 Replies

5932 Views

Last post by mattyzip77
Thu Jul 07, 2011 10:36 am
spud gun hairspray help

Last post by Insomniac
Replies: 5
by rexw7 » Mon Jul 04, 2011 5:10 am

First post

Hello Everybody

I'm kinda new to the spudfiles and i'm not English or American so please don't mind my language.I am building a new spud gun but...

Last post

As said before, simply explain to them that the main flammable component of hairspray, is the hydrocarbon propellant mix which is usually either...

5 Replies

3255 Views

Last post by Insomniac
Wed Jul 06, 2011 7:10 am
lubricant as a fuel in a spud gun

Last post by jsefcik
Replies: 6
by rexw7 » Tue Jul 05, 2011 11:15 am

First post

Hi Everybody

first i want to thank you guys for helping me with my spudgun problems.
secondly I have got a question is lubricant/contact spray a...

Last post

OK, i see what you mean

Edit by Moderator (MrCrowley): Don't double post (i.e., do not post replies consecutively in the same topic, edit your...

6 Replies

2868 Views

Last post by jsefcik
Tue Jul 05, 2011 6:08 pm
A little project I would like to do.

Last post by saefroch
Replies: 47
by warhead052 » Wed Jun 22, 2011 11:53 am
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So I came up with this idea, you guys are most likely going to tell me its stupid, and I should not do it, but I have a feeling it will work, and...

Last post

I don't suggest gasoline vapors, as I recall the vapor pressure is only about 4psi, so it's darned hard to fuel with gasoline. I did however manage...
47 Replies

16479 Views

Last post by saefroch
Sun Jun 26, 2011 2:24 pm
Sparker help.

Last post by saefroch
Replies: 1
by warhead052 » Sat Jun 25, 2011 4:25 pm

First post

I need some help taking that, with out ruining it, and allowing it to spark on screws instead of the metal box. How do I get the sparks to the screws...

Last post

Disconnect the leads. You'll notice that there are two bronze pieces sticking out of the igniter itself, one on the botton and one on the side. One...

1 Replies

1050 Views

Last post by saefroch
Sat Jun 25, 2011 5:29 pm

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