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

954970 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
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Last post by quinn whitsitt
Fri Mar 01, 2024 10:52 am

Topics

advanced combustion ?

Last post by super spuder
Replies: 7
by super spuder » Fri Sep 28, 2007 3:54 pm

First post

for a while now i have been making pneumatic cannons, and have made some pretty powerful ones. But i was getting tired of always having to shoot by...

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well i cant buy anything online :? all i have is what i can get intown, speaking of what i got intown, i got all the parts to make a propane metering...

7 Replies

4649 Views

Last post by super spuder
Sat Sep 29, 2007 9:06 pm
Making the process a bit easier

Last post by pyromaniac
Replies: 22
by CS » Sun Sep 23, 2007 6:20 pm
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In chase of the ever elusive goal...

For me I find both the loading of the projectile, and the venting of the chamber two slight annoyances.

Today...

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You need your chamber to be sealed off to put the oxygen in right? You could change the way the piston is put in. You could move it to the tee and...
22 Replies

7440 Views

Last post by pyromaniac
Sat Sep 29, 2007 6:41 pm
Sorry I bin away but i had a disaster!!!

Last post by super spuder
Replies: 17
by Bubba05 » Thu Aug 02, 2007 9:22 pm
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Jeeze its bin awile but i had a catastrphic malfunction of a heater and my house burnt down!! and my cannon witch was under my bed got toasted nicley...

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sorry that this is kinda an old topic, but i just came across it today cause i am not in here to much in the summer. Hope the insurance works out, i...
17 Replies

5362 Views

Last post by super spuder
Sat Sep 29, 2007 1:55 pm
combus. cannon material(s)

Last post by MrCrowley
Replies: 15
by trainengineer » Thu Sep 27, 2007 10:11 am
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Hi all......
Wow....ya'll get serious w/this stuff.......
I am new to cannons and computer's.......ha.ha......
I need to build a potatoe cannon...

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For the last goddamn time stop double posting! Get it in your head, I can't give you a proper warning because I have to go and pack for SF, but if...
15 Replies

4351 Views

Last post by MrCrowley
Fri Sep 28, 2007 11:11 am
C:B Ratio's Tell me what works for you

Last post by williamfeldmann
Replies: 8
by shiftyguy » Thu Sep 27, 2007 6:46 am

First post

I have herd allot about C:B Ratios and every body uses something different, (probably due to what they found for free) I would like to hear about...

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Uh, is the correct answer no :wink:

I agree this is basically a dead arguement. There has been more than enough studying done on C:B ratios.

There...

8 Replies

2665 Views

Last post by williamfeldmann
Fri Sep 28, 2007 10:32 am
Preliminary design - long range golfball cannon

Last post by MortarArmy
Replies: 9
by MortarArmy » Wed Sep 26, 2007 3:33 pm

First post

Working out the details on a new cannon and looking for some feedback

Here's what ive got in mind, and im hoping for at least 350yds. My current...

Last post

this next gun is going to have a big ass mofo of a fan, thing sounds like a vacuum cleaner when its running.

how does ammo type, fan speed and spark...

9 Replies

6171 Views

Last post by MortarArmy
Thu Sep 27, 2007 5:58 pm
Disposable Camera Stun-gun for igniter

Last post by shiftyguy
Replies: 5
by shiftyguy » Mon Sep 17, 2007 6:21 am

First post

I am new to this forum.. I say hello to all.

I have been using the BBQ igniter however i have found this a poor sparker, and it always seems after a...

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Again an update. I had installed a fan & camera/coil igniter to the chamber, and i had thought the additional power was due to the fan, however my...

5 Replies

4375 Views

Last post by shiftyguy
Thu Sep 27, 2007 6:21 am
my first spud gun

Last post by jimmy101
Replies: 5
by 94celica » Tue Sep 25, 2007 7:54 pm

First post

hi im new here, well yesterday i made a potato gun, it has a 4in I.D. chamber that is 20in long and the barrel is 2in I.D and is 20in long, is this...

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Read up on CB Ratio on the Spud wiki;

For a generic combustion spudgun you want the chamber volume to be 50% to 100% of the barrel volume, that...

5 Replies

1874 Views

Last post by jimmy101
Wed Sep 26, 2007 11:20 am
Weak 4" Bore Cannon

Last post by Dornep
Replies: 5
by Dornep » Tue Sep 25, 2007 8:22 pm

First post

I've built a 4 bore cannon using an 8ft section of SDR-26. It has an on board propane meter made of a 12 x 1/2 galvanized steel nipple, and an 80mm...

Last post

EDIT**

I think I have it just about figured out now... Tried shortening the chamber volume by a few inches and injected 60PSI like I did the other...

5 Replies

2045 Views

Last post by Dornep
Wed Sep 26, 2007 11:10 am
One entry Cannon.

Last post by Redcoat
Replies: 14
by Redcoat » Sun Sep 23, 2007 2:30 am

First post

Hi all,

I know people have done this but i wasn't sure if I remembered correctly. It's not something I've dabbled in. It will be my first Combustion...

Last post

Okay everyone! It's done!!!!! Works really well too!!!!! :D :D :D :D .

Unfortunately all my tests were done in the pitch black night. aka five...

14 Replies

3182 Views

Last post by Redcoat
Wed Sep 26, 2007 3:43 am
ABS with Metered Propane

Last post by psycix
Replies: 21
by Canadian Spudder » Thu Sep 20, 2007 6:47 pm
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First post

(I'm a long time reader first time poster so bare with me here ) =)

Well, I have been using a basic combustion canon for over a year now, and I...

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I think a burst disk is useful on combustions wich are long and small diameter chamber. This is because the pressure is builded up more slow in those...
21 Replies

6266 Views

Last post by psycix
Tue Sep 25, 2007 10:08 am
my private coin challenge

Last post by jackssmirkingrevenge
Replies: 15
by hyldgaard » Tue Sep 25, 2007 4:34 am
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Hi, I'm a long time reader but first time poster, so please bare with me and my not so good english :oops:

Well, here's the idea: in a couple of...

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A QEV is by far more convenient to use than a burst disk, again there's many copper QEV cannons on the site built using European fittings, you...
15 Replies

4270 Views

Last post by jackssmirkingrevenge
Tue Sep 25, 2007 9:46 am
New combustion cannon

Last post by super spuder
Replies: 15
by super spuder » Sun Sep 23, 2007 7:59 pm
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well i have not posted any of my guns on here for a while because no one liked me using ABS for pneumatics, so i was bored today and i had found a...

Last post

i want to put a propnae metering system on this one now :twisted:
15 Replies

6176 Views

Last post by super spuder
Mon Sep 24, 2007 7:20 pm
Boom

Last post by Redcoat
Replies: 12
by rebalgray » Sun Sep 23, 2007 1:00 am

12 Replies

4643 Views

Last post by Redcoat
Mon Sep 24, 2007 4:19 am
Cooling Down the Gun

Last post by Redcoat
Replies: 23
by Saboo » Thu Aug 30, 2007 9:09 pm
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I have a combustion gun that requires petrol to fire a small home made pellet that lots like a penut into quarter inch copper pipe. What methods of...

Last post

Well I've given him a massive bollocking, He said he's left Spudfiles for good becuase he thinks your all losers . He didn't even know how a...
23 Replies

6425 Views

Last post by Redcoat
Mon Sep 24, 2007 2:56 am
a few basic questions

Last post by irishguy
Replies: 18
by irishguy » Fri Sep 21, 2007 8:36 pm
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how long should my combustion chamber be if im using a 4ft 2inch barell and the standered orange pvc pipe chamber and also will butane work

Last post

cant seem to find preshure rated in ireland at lest not localy the only choices are this orange pvc-u and black stuff that is only for down pipes
18 Replies

5091 Views

Last post by irishguy
Sun Sep 23, 2007 7:30 pm
The Last Blast

Last post by HaiThar
Replies: 25
by mark.f » Wed Aug 02, 2006 9:30 am
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First post

Cannon Name- The Last Blast
Type of Cannon- Metered Propane Combustion
Chamber Size- ~4 x 22
Barrel Size- 2-1/2 x 60
-Combustion
--Metered...

Last post

Oops...dead thread :x
25 Replies

14341 Views

Last post by HaiThar
Sun Sep 23, 2007 1:31 pm
New member - First propane gun

Last post by MortarArmy
Replies: 16
by MortarArmy » Mon Sep 17, 2007 12:05 am
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Started off as just the standard aerosol spay and pray gun, but that was getting old and messy. SO....less than 24hrs after its initial creation,...

Last post

well i added 2ft to the barrel, a ball valve and properly sealed everything 100% and now im up to 225yds. Verified with my portable GPS.

barrel made...
16 Replies

4538 Views

Last post by MortarArmy
Sun Sep 23, 2007 12:19 pm
sucsess

Last post by irishguy
Replies: 3
by irishguy » Sat Sep 22, 2007 6:02 pm

First post

Success my first cannon worked first time

Here is what I did ill levee things in approximate metric to save confusion I got an eye piece which is...

Last post

ill be taking it out tomarow for a test run but i have to find somwere to shoot it and get some one to video tape me hopfully not the cops

3 Replies

1765 Views

Last post by irishguy
Sat Sep 22, 2007 8:49 pm
Ratios? Please help

Last post by jimmy101
Replies: 18
by Potato Head » Sat Sep 15, 2007 4:20 pm
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Hi I am a rookie builder and I want to make the most powerful gun. I know that 1.5:1 is the best ratio. Can someone calculate the math for me so that...

Last post

Thanks so can you help me ?

Chamber : 4'' X 18'' = 226 ci.

my two first one were really not well made lol
:?
volume chamber = PiR 2 L =...
18 Replies

5637 Views

Last post by jimmy101
Sat Sep 22, 2007 12:34 pm
bbq vs. flint

Last post by Novacastrian
Replies: 16
by potato launcher » Tue Sep 11, 2007 9:35 pm
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i know this question is asked alot but what are your guys preferecne between the two, Thanks

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Whats the question? I would not use an inferior ignition device (flint), if i could obtain a bbq piezo :wink:
16 Replies

5741 Views

Last post by Novacastrian
Sat Sep 22, 2007 12:31 am
Oxygen/Mapp questions

Last post by Novacastrian
Replies: 5
by Dornep » Wed Sep 19, 2007 8:59 pm

First post

A few weeks ago I was showing my brother my combustion launcher and explained to him the concept of metered propane and my interest in building a...

Last post

Are you planning remote detonation?
That's a lot of fuel to have under your chamber :twisted:

5 Replies

2053 Views

Last post by Novacastrian
Fri Sep 21, 2007 11:11 pm
Mag-Lite Combustion

Last post by Dornep
Replies: 6
by Dornep » Tue Sep 18, 2007 11:45 am

First post

I just had an idea and I was wondering if anyone had tried it before.

I'm thinking of taking one of my Mag-Lites and making it into a mini coaxial...

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I would use the flash lights handle as the barrel, only pushing the projectile in about 3/4 of the way down.. Oh and I will probably try the mini mag...

6 Replies

2004 Views

Last post by Dornep
Thu Sep 20, 2007 9:24 pm
question about fan

Last post by Mr.Russ
Replies: 9
by Mr.Russ » Tue Sep 18, 2007 6:18 am

First post

hey guys, im looking to put a fan into my new combustion, and i was wondering if it matters if the wires run inside the chamber to connect the fan to...

Last post

okay. they have fans at the cheap shop down the road for me, the little personal ones. the fan blades are soft plastic, like thick glad wrap. One of...

9 Replies

2608 Views

Last post by Mr.Russ
Thu Sep 20, 2007 7:12 pm
curious question

Last post by jimmy101
Replies: 12
by jon_89 » Tue Sep 18, 2007 10:31 pm

First post

does the diameter of the combustion chamber matter? does a one inch chamber have a different effect than a two inch chamber.

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You really don't need a spherical chamber. Just use a chamber that has length approximately equal to the diameter. Much easier than a spherical...

12 Replies

3231 Views

Last post by jimmy101
Thu Sep 20, 2007 10:58 am

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