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

640682 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

214916 Views

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

Topics

dwv fittings

Last post by psycix
Replies: 10
by q » Wed Mar 12, 2008 3:10 pm

First post

well, i realized that i bought dwv fittings for my spud gun that i posted pic of. the wye fitting is dwv. Are these things like death or will I be ok...

Last post

thanks for the input guys. i will be tearing this thing down this weekend and rebuilding with pressure rated fittings. Even if there is a very small...

10 Replies

2505 Views

Last post by psycix
Thu Mar 13, 2008 4:37 pm
First Timer w/ a metering system??

Last post by q
Replies: 19
by q » Thu Mar 06, 2008 2:41 pm
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First post

Whats up folks. Newb here.

Questions I have:

1. I made a metering system exactly like what spudtech guy uses with 6 of 3/8 brass and 2 ball...

Last post

crap...

well i just inspected my wye fitting and it si in fact a dwv fitting. With a combustion chamber of this size should I be worried about this...
19 Replies

6030 Views

Last post by q
Wed Mar 12, 2008 7:47 am
ignition coil -> spark plug

Last post by Matheusilla
Replies: 3
by nick753159 » Mon Mar 10, 2008 9:44 pm

First post

well, I'm trying to wire a new ignition system for my gun, and its not working out that well.
the system has a 9 volt battery, automotive ignition...

Last post

You also need a capacitor. I'm pretty sure it gets placed between the coil and the battery on the negative side (earth side, same as spark plug...

3 Replies

2055 Views

Last post by Matheusilla
Wed Mar 12, 2008 6:27 am
Ignition coil

Last post by ralphd
Replies: 19
by elitesniper » Mon Mar 10, 2008 3:38 pm
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hey guys, can any of you explain to me how to biuld an igntion coil that can be run by a camera circuit, as said here

Last post

I understand you want something small but a 65kv stungun is the way to go. It cost me $18 total. $2 was for the camera flash I found at a Salvation...
19 Replies

5822 Views

Last post by ralphd
Tue Mar 11, 2008 11:50 am
More Temp. in closed combustion chamber

Last post by benstern
Replies: 1
by jimmy101 » Sun Mar 09, 2008 8:16 pm

First post

Following up on my Temperature in a closed combustion chamber post of several weeks back.

I've used the accoustic techniquie to measure the...

Last post

Good work man!! I always love to see science and research used to better our knowledge of spudguns.

Next time try multiple gauges spaced out along...

1 Replies

1047 Views

Last post by benstern
Sun Mar 09, 2008 8:25 pm
Ignition Coil Question

Last post by nz_cannons
Replies: 16
by revans » Wed Feb 27, 2008 2:41 am
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First post

I have put together a camera circuit as an spark ignition (this one here):

and have wired it up to an ignition coil as shown in the tutorial (this...

Last post

It's all good bro just get it and see. Ive yet to find a coil that doesn't do something and ive got a shitload of differnt types around.
16 Replies

4993 Views

Last post by nz_cannons
Sat Mar 08, 2008 5:25 pm
Noob Questions...of course

Last post by Ragnarok
Replies: 20
by tyrant_bb » Wed Mar 05, 2008 10:13 pm
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First post

I haven't made any spud guns yet, but I definitely plan on making some soon once the weather warms up. Of course, I have a few questions.

First of...

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i know for a fact that it is under 1.2:1 because I extended the barrel on my spray and pray from 1.6:1 to 1.2:1 and it got quieter and poer increased...
20 Replies

5538 Views

Last post by Ragnarok
Sat Mar 08, 2008 2:15 pm
first mini... not sure about fuel

Last post by cenzo188
Replies: 3
by cenzo188 » Fri Mar 07, 2008 5:33 pm

First post

This is my first mini combustion. I used an old pill bottle, a pen tube, and a BBQ lighter salvaged from my first conbustion (which failed). Only...

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hey, thanx. 4 cc's worked just fine. I shot a sharpened q tip a centimeter into my garage door!
now off to do more shooting

3 Replies

2177 Views

Last post by cenzo188
Sat Mar 08, 2008 1:37 pm
My first metered propane cannon :)

Last post by q
Replies: 12
by q » Thu Mar 06, 2008 10:24 pm

First post

24in of 3 sch40 coupled to 26 of 1.5 sch40

made my own regulator from an inline pneu-trol valve which i rigged to have a psi gage hooked onto it....

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Where did you get the Adapter for the propane tank. I got myself a tank like that today, and the place that had the tank did not have the adapter,...

12 Replies

4418 Views

Last post by q
Fri Mar 07, 2008 1:34 pm
making your projectile go further

Last post by SpudUke5
Replies: 43
by ROCK SOLID » Wed Mar 05, 2008 6:14 am
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Well i am new to this forum and to spud guns and i've only built one but i am

going to build more but my neighbor also has a spud gun and he said he...

Last post

Well that changes everything now :lol:

Ohhhhh i get it :D
43 Replies

9163 Views

Last post by SpudUke5
Fri Mar 07, 2008 1:11 am
Wiring 9 volt batteries

Last post by Shango
Replies: 6
by Shango » Thu Mar 06, 2008 7:13 pm

First post

Iamb a newbie at spudguns and am going to build a pneumatic jobbie. I have to wire three 9 volt batts together. my question is how do you make the...

Last post

OK, I'll chech the how to. Thanx Turbo

6 Replies

2466 Views

Last post by Shango
Thu Mar 06, 2008 8:16 pm
Propane tanks, and meters

Last post by Spitfire
Replies: 2
by Spitfire » Wed Mar 05, 2008 11:46 am

First post

Last week i built a propane meter for my combustion.

Here it is with my chamber ( The meter has been shortend since)

I then go looking for a...

Last post

I havent brought that adapter yet.

Im going to go to a gas factory today and check if they got, they must have

2 Replies

1316 Views

Last post by Spitfire
Thu Mar 06, 2008 7:40 am
Micro Advanced Combustion)(almost)

Last post by starman
Replies: 17
by elitesniper » Mon Feb 18, 2008 9:16 pm
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First post

The MAC, my first combustion, uses peizo ignition,chamber fan,9.5x2 inch chamber, will get 3/4sch40 40'' barrel giving it a 1.5:1 ratio, everything...

Last post

thanks for the compliments guys, do you guys think the epoxy is strong enough to hold the handle and project box in place even after many recoil and...
17 Replies

7229 Views

Last post by starman
Tue Mar 04, 2008 3:05 am
Rate of propane diffusion in air

Last post by jimmy101
Replies: 7
by jimmy101 » Wed Feb 27, 2008 2:10 pm

First post

For several years I've wondered how fast a shot of propane will diffuse in a combustion chamber. To get the fuel to ignite it has to be pretty close...

Last post

Not sure what you mean by more realistic . The injection method is basically what happens when you inject with a syringe, which is how I fuel my...

7 Replies

3296 Views

Last post by jimmy101
Mon Mar 03, 2008 6:38 pm
Clear Chamber Combustion Video Fun

Last post by jimmy101
Replies: 18
by jimmy101 » Wed Feb 27, 2008 2:37 pm
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So, after measuring the approximate rate of propane diffusion in air , I figured the long, skinny and clear combustion chamber would make for some...

Last post

On a related note, I wanted to respond to something you said in another thread but I've not been able to find it. Somewhere you mentioned that you...
18 Replies

5691 Views

Last post by jimmy101
Sat Mar 01, 2008 12:35 pm
Pressure Gauge Placement and Other Propane Stuff

Last post by Spitfire
Replies: 16
by revans » Tue Feb 26, 2008 2:00 am
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Hey guys, I've looking at making a propane injection system and after looking at tutorials and other people's launchers I've deduced that:
1) The...

Last post

Oh no. Its Shade netting that i put over the reducer, it had a habit of breaking and sending pieces to far off places. But since ive done that iv had...
16 Replies

6335 Views

Last post by Spitfire
Sat Mar 01, 2008 12:02 pm
how to install a bbq igniter?

Last post by bigbob12345
Replies: 12
by austin_palmeri » Tue Feb 26, 2008 6:10 pm

First post

ok so i have my combustion chamber and barrel assbly all complete now to install the bbq igniter. i was hoping someone could give me step by step...

Last post

My igniter is mounted directly inside my chamber and protrudes about 2 in to ensure the best possible ignition. A quality igniter should have a screw...

12 Replies

10192 Views

Last post by bigbob12345
Sat Mar 01, 2008 9:26 am
A few questions

Last post by STHORNE
Replies: 12
by Mattmp36 » Thu Feb 28, 2008 1:30 am

First post

Ok, I built a potato cannon before, but I want to build another and I need your help. I have a few questions about the materials to use and...

Last post

If you're more concerned about the potato going the distance, i suggest ( like elitesniper, bigbob12345 and pizlo mentioned) making a pneumatic...

12 Replies

3561 Views

Last post by STHORNE
Thu Feb 28, 2008 9:33 pm
combustion auto on the market

Last post by Bubba05
Replies: 11
by jackssmirkingrevenge » Wed Jan 09, 2008 6:14 am

First post

Why hasn't a redneck engineer yet converted one of these to fire spuds :D

Last post

lol! yes i do sometimes astound my self with the bullsh*t that flows forth when im in a jam!
all in goo fun thoe boys!!

Bubba

11 Replies

2870 Views

Last post by Bubba05
Thu Feb 28, 2008 8:56 pm
Need Help with Ideas on Venting the Chamber

Last post by MaxuS the 2nd
Replies: 12
by MaxuS the 2nd » Wed Feb 27, 2008 6:33 pm

First post

Hey Guys.

I didn't particularly want to reveal any of it yet, but:

Right, so this is my first combustion. It's going to be advanced, with...

Last post

Thanks guys, I hadn't thought of that, that may be the way to go then.

12 Replies

2899 Views

Last post by MaxuS the 2nd
Thu Feb 28, 2008 3:45 pm
C:B ratio

Last post by jimmy101
Replies: 1
by Mattmp36 » Thu Feb 28, 2008 12:19 pm

First post

I have been trying to develop plans for a new spud gun. I am a little unsure if my calculations are right though. I thought of a 4 x 12 CC and a 1.5...

Last post

The simplest equation to calc CB ratio of your guns is just:
(4*4*12)/(1.5*1.5*60) = 1.4222
Or
(2*2*12)/(0.75*0.75*60) = 1.4222

Or
V chamber =...

1 Replies

1320 Views

Last post by jimmy101
Thu Feb 28, 2008 2:01 pm
LRTM-100

Last post by brogdenlaxmiddie
Replies: 10
by Killjoy » Tue Sep 25, 2007 2:40 am

First post

LRTM-100

L ong R ange T actical M ortar- 100 mm

Specs:
-4 diam barrel 5.5 feet long
-4 diam chamber 5 feet long
->Over 10 feet long

-Stun...

Last post

I like how you recycled some of the parts :D

10 Replies

5544 Views

Last post by brogdenlaxmiddie
Wed Feb 27, 2008 4:09 pm
Gun Plans

Last post by jook13
Replies: 21
by SpudChucker24 » Wed Feb 13, 2008 1:56 am
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Ok so i was just brain storming something for my next cannon and this is what i have. My goal here is to get pass 1000 feet (Hopefully is do-able...

Last post

Dear God this so makes me want to move into the middle of nowhere, where I can spud to my heart's content, with guns actually big enough to fire...
21 Replies

6134 Views

Last post by jook13
Tue Feb 26, 2008 1:54 am
Mini Spud made from a laser!

Last post by The_Crow681
Replies: 17
by rcman50166 » Fri Jan 25, 2008 10:10 pm
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I used an old cerca 1970 laser. Removed the laser tube, stuck in a barrel and chamber and had fun! In a certian conext I made a laser cannon! Video...

Last post

well i cant help wanting to be able to make something that kewl.
17 Replies

9382 Views

Last post by The_Crow681
Mon Feb 25, 2008 11:30 pm
My Piezo Igniter - Will it Work, and how to make it work?

Last post by fireman565
Replies: 4
by GeForce » Mon Feb 25, 2008 4:29 pm

First post

Firstly, Hello Spudfiles :)

Well i'm pretty much ready to start building, just received my last component which is the ignitor. I'm here to ask,...

Last post

Fit the ignitor through two layers of PVC (through a fitting) otherwise you may cause structural damage to the pipe.

I ended up just running two...

4 Replies

2569 Views

Last post by fireman565
Mon Feb 25, 2008 10:37 pm

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