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

1955808 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

534569 Views

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

Topics

right ratios

Last post by boilingleadbath
Replies: 9
by kimmimaru1227 » Thu Dec 20, 2007 9:11 pm

First post

i was wonderin about my gun and a problem arose..... need the right propane to air ratio..so if anyone knows it plz tell.

Last post

Ya know, there's a fairly good chance that the 4.9% test velocities where actually higher than the 4.6% tests... latke's data had a large standard...

9 Replies

3389 Views

Last post by boilingleadbath
Fri Dec 21, 2007 4:01 pm
My launcher

Last post by ralphd
Replies: 7
by ralphd » Tue Dec 18, 2007 10:28 pm

First post

This is my first and it went through many changes. I have a 3 chamber that's about 115.5 cubic inches and my barrel is about 34.5 @ 1 1/2 dia. It...

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Well, it's not separated. When I went out to buy a ignitor I couldn't find one that had a nut to secure it and I didn't think it was necessary after...

7 Replies

3302 Views

Last post by ralphd
Thu Dec 20, 2007 12:44 pm
CB Ratios

Last post by ralphd
Replies: 3
by ralphd » Mon Dec 17, 2007 8:51 pm

First post

I first read that 1.5 to 1 is optimal so that is what I designed for. It was OK but when I switched to metered propane and a combustion the gun...

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Well, I guess I can always go to 2 . I didn't install a camlock but I can remove it easily. Another projectile I wanted to launch is tennis balls and...

3 Replies

2320 Views

Last post by ralphd
Tue Dec 18, 2007 1:06 pm
Advance combustion doesnt work??

Last post by cwazy1
Replies: 15
by cwazy1 » Sun Dec 16, 2007 4:14 pm
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So i built my second advanced combustion for a friend and im debugging right now and it seems like its not lighting the propane mixture??

my chamber...

Last post

yeah okay, its the fan, no fan=no shot. i added a fan and it works great now. =)
15 Replies

6192 Views

Last post by cwazy1
Mon Dec 17, 2007 8:28 pm
8" PVC combustion chamber

Last post by shiftyguy
Replies: 16
by shiftyguy » Tue Dec 11, 2007 11:56 am
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Has anyone tried an 8 combustion chamber, and reduced it down to 4 and then down to 2 for the barrel?

It sounds like fun. probably could get a hell...

Last post

To answer an earlier question, I work at a demolition company, so i get loads of interesting stuff.....

I think It will be an 8 PVC with a propane...
16 Replies

5508 Views

Last post by shiftyguy
Sun Dec 16, 2007 7:46 pm
new spudgunner

Last post by rp181
Replies: 22
by rp181 » Thu Dec 13, 2007 9:02 pm
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hey all, this is my first post, though ive been reading the forums for about a month. Everyone here seems smart and helpfull =)

About two weeks ago,...

Last post

i have a hack saw, but i might as well have them cut in 30 sec then me cutting :). they usually cut other stuff for free
22 Replies

8760 Views

Last post by rp181
Sun Dec 16, 2007 11:17 am
Not Mini, but certainly not Cannon either

Last post by bigbob12345
Replies: 7
by xequa » Thu Dec 13, 2007 12:14 am

First post

I want to build a potato pistol... a little handheld. Not a mini made out of garbage & tape.... but a 2 chamber made of fittings, and some kind of 1...

Last post

Just use primer and cement

7 Replies

2849 Views

Last post by bigbob12345
Thu Dec 13, 2007 10:30 pm
saftey of acetlene or oxygen in Sch80

Last post by JDP12
Replies: 42
by bigbob12345 » Sat Dec 01, 2007 10:31 am
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Would it be safe to use acetlene or oxygen if I used Sch80 pipe

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ah okay.. then thats what happens.. but it pretty much detonates very quickly, thanks for clarifyin that DYI.

haha... i just had a chemistry test...
42 Replies

16992 Views

Last post by JDP12
Thu Dec 13, 2007 7:22 pm
Silverdooty's Last Combustion

Last post by origin unknown
Replies: 13
by bluerussetboy » Sun Dec 09, 2007 3:29 pm

First post

On 11/16/07 a man I knew as Big Graham Rogers passed away. Spudfiles knew him as Silverdooty. In these parts he was known simply as Big or the cranky...

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I feel sorry for you and his family that he died. Let him rest in peace with spuds always.

13 Replies

3706 Views

Last post by origin unknown
Tue Dec 11, 2007 8:36 pm
science project

Last post by jimmy101
Replies: 11
by monkeyman » Sat Dec 08, 2007 2:30 pm

First post

for my science project, I want to find the optimum air to propane ration when firing a spud gun, how can I go around finding how much propane do I...

Last post

Hate to tell you this but the methods you have choosen are really not adequate for doing even a half-ass job of measuring performance versus fuel...

11 Replies

3868 Views

Last post by jimmy101
Tue Dec 11, 2007 12:12 pm
Static Guard and Oust = Dont Work!?

Last post by shiftyguy
Replies: 10
by cameronfield » Thu Dec 06, 2007 11:05 am

First post

So, after reading this forum for a while I noticed that most people either use propane, butane, or an aerosol. For aerosols, most people seem to use...

Last post

I use oust 95% of the time, i had challenges getting it to light and had to change it to using a camera flash ignighter, and I had less than 5%...

10 Replies

4164 Views

Last post by shiftyguy
Tue Dec 11, 2007 11:32 am
SPUDr my version of the SPNKr

Last post by Novacastrian
Replies: 29
by paintballninja » Thu Nov 29, 2007 2:11 pm
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hey folks, i'm new to this forum & this recreation/hobby whatever catagory it's placed under, anyway, a friend & i were watching the special features...

Last post

I have built like 15-20 combustions and two hybrids, also a Piston co-axial pneumatic. That's like one to twenty!

Where the hell do you get your...
29 Replies

9716 Views

Last post by Novacastrian
Tue Dec 11, 2007 1:36 am
Combustion Competition

Last post by DYI
Replies: 22
by xXunderXcoverXx » Sun Dec 09, 2007 1:55 pm
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So this is my first post and new to spudfiles but I'm not new to spudding. Ive built a pneumatic gun that will be on here soon and as human male...

Last post

I will now point out a simple fact that I have pointed out inummerable times before, and post it in large font so that you may notice it a bit better...
22 Replies

6853 Views

Last post by DYI
Sun Dec 09, 2007 7:38 pm
Recently completed

Last post by MikeNice
Replies: 9
by MikeNice » Sat Dec 08, 2007 4:25 pm

First post

This is my most recently completed cannon. It's actually a Christmas Gift for my step brother back east. My Step mother asked me to build it for him...

Last post

Do you need a barrel support or is it pretty sturdy as it is?

I've never used a barrel support in there and it has never been a problem. None of...

9 Replies

4660 Views

Last post by MikeNice
Sun Dec 09, 2007 12:17 pm
Pressure rated for chamber? ignitor?

Last post by Jimy-Jonz
Replies: 17
by Jimy-Jonz » Sat Dec 08, 2007 12:14 pm
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im new to making combustion guns. i have make a big pneumatic, mini pneumatic, and a mini combustion. i was wondering if the combustion chamber has...

Last post

...Your chamber seems like it may be Polycarbonate, that would be fine to use.
If it has a bit of give like you said i don't see any reason not to...
17 Replies

5375 Views

Last post by Jimy-Jonz
Sun Dec 09, 2007 4:57 am
schrader valve

Last post by MrCrowley
Replies: 5
by monkeyman » Sun Dec 09, 2007 1:40 am

First post

if i have this on my propane meter.

is this the schrader valve that I need to get the gas from the meter into the chamber

(the one that is 1/4...

Last post

Yeah it should work.

5 Replies

2492 Views

Last post by MrCrowley
Sun Dec 09, 2007 3:09 am
Full auto combustion

Last post by jackssmirkingrevenge
Replies: 37
by Ragnarok » Tue Nov 27, 2007 7:35 pm
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As I mentioned in another thread, I'm working on plans for an auto combustion - and I'll have an nice little animation soon for you to look at soon....

Last post

If it's all metal, why get rid of the heat at all? If the fuel/air mix is already hot then it will burn better, besides I doubt you're going to...
37 Replies

10407 Views

Last post by jackssmirkingrevenge
Sun Dec 09, 2007 1:50 am
2nd Potato Gun - A Few Quick Questions for You Pros :)

Last post by octane89
Replies: 33
by cameronfield » Tue Dec 04, 2007 11:43 am
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So some friends and I want to build an awesome potato gun. I have one that a friend and I built years ago, which works pretty well. Just your basic 3...

Last post

Propane can be pretty harmful if used incorretcly. Making one is simple, but like everything research is always helpful and quite neccessary.

There...
33 Replies

9464 Views

Last post by octane89
Fri Dec 07, 2007 10:40 pm
Finding 5" Parts?

Last post by bob-a-lu
Replies: 17
by cameronfield » Wed Dec 05, 2007 7:06 pm
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First post

I'm having trouble finding the following parts for my gun:

5 to 4 Converter
5 Threaded Cleanout
5 Threaded End Cap

Any suggestions?

Last post

like dyi said check www.mcmaster.com
17 Replies

14221 Views

Last post by bob-a-lu
Fri Dec 07, 2007 7:35 pm
1I65CM-M Shotgun (now with damage pic's)

Last post by foothead
Replies: 22
by Jack_Hogg » Sat Jun 23, 2007 6:55 am
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1 to 65cm Marble Shotgun

Shot with marble:

Shot with marble:

Shot with bb:

Shot with bb:

Full view:

Isometric view:

Gas flow:...

Last post

that thing's awesome.
22 Replies

8747 Views

Last post by foothead
Fri Dec 07, 2007 5:59 pm
Ondskehem: c926 .Carrot All metal breechloaded carrot-gun

Last post by Brian the brain
Replies: 20
by ondskehem » Mon Jul 09, 2007 7:17 am
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edit: closed thread.
Moderator please delete this.

Last post

Very nice!!.I love the square tubing!!
The breechloader is a piece of art.

On the next cannon, I hope you finish everything.By that I mean sanding...
20 Replies

11214 Views

Last post by Brian the brain
Fri Dec 07, 2007 5:51 pm
A few questions - DWV etc

Last post by Exploit101
Replies: 17
by Exploit101 » Fri Dec 07, 2007 12:21 am
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I recently bought all the parts for my spud gun, only to realise after I primed & cemented it that it says DWV and has nothing I can see that says it...

Last post

Haha, not like my cannon is anything special but sure, I'll take some pics or my awesome cement job! lol, It's all pretty, blue and red running down...
17 Replies

4069 Views

Last post by Exploit101
Fri Dec 07, 2007 1:41 am
Sprinkler Valve

Last post by ShowNoMercy
Replies: 11
by ShowNoMercy » Thu Dec 06, 2007 5:28 pm

First post

A few days ago some one was asking about a combustion with a breach loading feature. I was thinking about it and since a combustion requires a burst...

Last post

Ah I guess I misunderstood just how much pressure was put in first. Well then cancel that idea. Thanks for the help though.

11 Replies

2633 Views

Last post by ShowNoMercy
Thu Dec 06, 2007 10:17 pm
S.P.E.C.S the semiauto combustion prototype!!

Last post by Mr. Beaver
Replies: 11
by thespeedycicada » Mon Nov 26, 2007 9:18 pm

First post

Yes! its here!!...well sorta this is a prototype for testing reed movement and they are moving quite a bit! however this version is not meant to vent...

Last post

Its Shiny;)

I'm a 100% with you man!!

anyway nice looking thing you got there,
looks like a good start :), just about your voting options theyre...

11 Replies

8944 Views

Last post by Mr. Beaver
Thu Dec 06, 2007 2:32 pm
Problems with stun gun.

Last post by jimmy101
Replies: 28
by wangpushups » Thu Nov 29, 2007 4:28 pm
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It works but when i hold the trigger down it takes a while for the stun gun to warm up, and after about 30 sec. of me holding down the trigger it...

Last post

but a corona is better than a spark. oh well i guess my interests are lost on people like you. btw here is a link to a small TC that looks quite...
28 Replies

13709 Views

Last post by jimmy101
Thu Dec 06, 2007 9:28 am

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