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
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Sparker Reference Guide

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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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Topics

Combustible Gas Indicator?

Last post by Technician1002
Replies: 5
by BowerR64 » Wed Mar 26, 2014 10:53 pm

First post

Is there any cheap sniffer thing we could mount to the top that would signal or show an LED when the gas is at its best mix?

There are a few...

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The gas sensor used to detect Carbon Monoxide, Natural Gas, etc are generally based on the same semiconductor sensor. If you get the datasheet, you...

5 Replies

4775 Views

Last post by Technician1002
Thu Mar 27, 2014 8:11 pm
1:1 C/B Ratio

Last post by Zeus
Replies: 9
by Kilash » Sun Jan 05, 2014 12:36 pm

First post

I have a build in mind that involves the barrel and chamber being of the same pipe. The projectile would be located halfway in the pipe, creating the...

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Just right click the program, and select Run as administrator , I run it all the time on 64 bit computers

9 Replies

6131 Views

Last post by Zeus
Wed Mar 26, 2014 8:38 pm
Is a fitting stronger then a pipe?

Last post by BowerR64
Replies: 6
by BowerR64 » Thu Mar 13, 2014 1:57 am

First post

Say a 4 tee versus a 4 pipe in the same class sch40

Say i make a cannon using a tee or one using just pipe and a cap.

What are the weaker parts to...

Last post

No flag but that sounds cool, maybe a skull and cross bones on the side of it. The tennis balls seem light enough and im thinking about painting them...

6 Replies

4312 Views

Last post by BowerR64
Mon Mar 17, 2014 4:28 am
Should i paint it?

Last post by BowerR64
Replies: 3
by BowerR64 » Tue Feb 25, 2014 7:00 am

First post

Ive built about 15 of these carbide guns now (mostly smaller pistols) im getting a little better at it. I decided this time to make a rifle. The 1/2...

Last post

I went with tactical black.

The body and handle are a textured black has a kind of gritty texture to it not really rough but not smooth and shiny....

3 Replies

2337 Views

Last post by BowerR64
Wed Feb 26, 2014 8:04 pm
My Big Bang pop guns

Last post by jackssmirkingrevenge
Replies: 18
by BowerR64 » Sat Feb 01, 2014 4:49 am
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First post

My friend has a big bang cannon when i checked it out it was so simple i figured i could make something like that with PVC. His is one of the...

Last post

Did you see the class room example on the youtube videos?

Yes... must be awesome to have a professor who is a member of the Bloods!
18 Replies

11524 Views

Last post by jackssmirkingrevenge
Wed Feb 26, 2014 8:34 am
My first spud gun! Need input please

Last post by jackssmirkingrevenge
Replies: 10
by AnCap » Thu Feb 06, 2014 12:22 am

First post

Thanks a lot to this website, and a few other sources, I've been motivated to make my first ever spud gun. I decided on a propane injected...

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I would say a flyback transformer is overkill for a simple combustion, even a piezo ignitor from a cigarette lighter is sufficient to give reliable...

10 Replies

5593 Views

Last post by jackssmirkingrevenge
Sat Feb 08, 2014 8:17 am
Q's re: my 1st. attempt

Last post by Gleedaniel13
Replies: 2
by teebone66 » Sat Feb 01, 2014 3:24 am

First post

I've had a go at my first one and it has worked a few times thus far.
Any input re: the following greatly appreciated.
Ignition - Well I guess you...

Last post

Syringe fuelling FTW! Science is always a better idea than chance.

Because of that piezo lighter the much important of matches turned it into less....

2 Replies

2588 Views

Last post by Gleedaniel13
Sat Feb 08, 2014 4:12 am
Best way to syringe gas in?

Last post by jimmy101
Replies: 2
by teebone66 » Mon Feb 03, 2014 2:03 am

First post

I'm wondering what goog ways there are to inject butane into a chamber with a syringe might be.
I have seen some clips of guys using screws to block...

Last post

Do you have a needle for your syringe? If you do any small hole can be used as the injection port. I've even used a 1mm diameter hole (which a...

2 Replies

4160 Views

Last post by jimmy101
Mon Feb 03, 2014 4:06 pm
Newport butane refill cans

Last post by jackssmirkingrevenge
Replies: 3
by Jose Arcadio Buendia » Sat Jan 25, 2014 4:23 pm

First post

I bought a 250ml/139g Newport butane refill can. I measured with a syringe 9.5ml of butane for a ~3.2% mixture in my 290ml chamber combustion cannon...

Last post

Propane is a slightly more energetic fuel anyway, it's not a bad thing :)

3 Replies

2721 Views

Last post by jackssmirkingrevenge
Fri Jan 31, 2014 6:49 am
Glue for aluminum barrel into plastic chamber

Last post by nibbler125
Replies: 3
by teebone66 » Tue Jan 28, 2014 5:26 am

First post

I'm hoping to insert and seal barrels in the following scenarios:
Aluminum into plastic pill bottle.
Aluminum or copper into soda or Gatorade...

Last post

Yeah 5 minute epoxy should work just fine, rough the metal and plastic surfaces with sandpaper to help the glue stick. Also im assuming you are...

3 Replies

2933 Views

Last post by nibbler125
Fri Jan 31, 2014 1:49 am
second combustion gun

Last post by nibbler125
Replies: 4
by nibbler125 » Sun Jan 26, 2014 1:09 am

First post

Ok so I took a break from spud gunning but now I decided to come back and what better of a way then with an over under design. The gun is made with...

Last post

Looks great! Nice simple combustion gun. Do you use propane/butane or is this a spray n' pray?

Its spray and pray at the moment but there is lots...

4 Replies

4470 Views

Last post by nibbler125
Sun Jan 26, 2014 11:07 am
The Driver *video update

Last post by deathbyDWV
Replies: 2
by deathbyDWV » Fri Jan 10, 2014 7:58 pm

First post

Advanced Combustion GB Launcher

Hi spudfiles, I used to frequent this site with my creations but then things came up... (girlfriend, jeep, work) But...

Last post

Thanks man! Nice to hear from you again.

2 Replies

4594 Views

Last post by deathbyDWV
Sat Jan 11, 2014 10:50 am
.50 cal machine gun style gun from SPUD COMMANDER

Last post by PeteS
Replies: 7
by SPUD COMMANDER » Mon Sep 30, 2013 7:15 pm

First post

Our first gun we built. It was built from a 24 x 4 combustion chamber and a 50 barrel. It does pack quite a punch. We also mounted it on a lumber...

Last post

only because of him putting it out here!
How much difference did the burst disks make for this cannon?

Oh and nice cannon, looks like fun.

7 Replies

22744 Views

Last post by PeteS
Tue Jan 07, 2014 5:29 am
Whats your favortite fuel?

Last post by jimmy101
Replies: 13
by vng21092 » Sat Dec 28, 2013 7:30 pm

First post

Would you guys recommend butane? Or propane? Or something else...

Last post

so my chamber is 1 1/4 pipe x 6 inches, the volume is 7.36 inches which equals .121 liters, which is 121 ml? so I'm suppose to be using (3/100) * 121...

13 Replies

7417 Views

Last post by jimmy101
Tue Dec 31, 2013 2:28 pm
my paint became conductive?

Last post by vng21092
Replies: 5
by vng21092 » Fri Dec 27, 2013 8:00 pm

First post

I don't know how to explain this honestly, I had the chamber painted, had the bolts installed to create a spark gap. The spark gap formed flawlesssly...

Last post

yes sir but ONLY to show to paint was conductive, even with two wire the result was the same

5 Replies

3228 Views

Last post by vng21092
Sat Dec 28, 2013 2:18 pm
My second combustion cannon

Last post by Jose Arcadio Buendia
Replies: 3
by Jose Arcadio Buendia » Thu Dec 26, 2013 1:20 pm

First post

This is my second combustion cannon:
Update:

I bought some pipe and made barrel extension; I sanded down the division in the coupling so there...

Last post

How did you attach the fan to the plug?

Looks like tubes wedged into the cap.

It is pieces of tube from a windex bottle. I wrapped some tape...

3 Replies

3398 Views

Last post by Jose Arcadio Buendia
Fri Dec 27, 2013 8:47 am
teach me how to science?

Last post by jackssmirkingrevenge
Replies: 8
by vng21092 » Mon Dec 23, 2013 12:38 pm

First post

ok so wierd thing, The first picture is my firing chamber from the outside, the second is an internal view, the spark generates.... but under one...

Last post

and his groin as the recoil buffer.

Made me think for this for some reason:

8 Replies

6058 Views

Last post by jackssmirkingrevenge
Tue Dec 24, 2013 1:40 pm
Injection Port

Last post by jimmy101
Replies: 7
by vng21092 » Sun Dec 22, 2013 3:49 pm

First post

Whats the best way of turning a hole that goes through 2 layers of pvc pipe into a fuel injection port? the hole is around 1/4 inch in diameter
For...

Last post

You can also use a standard tire stem (from a car tire). A rubber stem costs a buck or so, a nice metal one perhaps $2. Get a stem removal tool and...

7 Replies

7164 Views

Last post by jimmy101
Mon Dec 23, 2013 4:21 pm
Cannon ignition question

Last post by jackssmirkingrevenge
Replies: 2
by vng21092 » Fri Dec 20, 2013 5:16 pm

First post

Would this create a spark gap? The first image is the chamber, that is a stripped solid piece of 12 gauge wire. The second image is a screw cap with...

Last post

Looks good, make sure you have around 1/4 between bolt and wire.

2 Replies

2371 Views

Last post by jackssmirkingrevenge
Sat Dec 21, 2013 8:42 am
Spare parts Copper Combust

Last post by jackssmirkingrevenge
Replies: 2
by tigerblues28 » Tue Dec 17, 2013 11:56 pm

First post

I saw the Ghetto combustion cannon contest start up in October/November so I picked up a lighter and gave it a go. Turns out, after the JB Weld...

Last post

Shame it's not a hybrid :)

2 Replies

2319 Views

Last post by jackssmirkingrevenge
Wed Dec 18, 2013 7:52 pm
O-Rings in combustion cannons

Last post by wyz2285
Replies: 6
by vng21092 » Sat Dec 14, 2013 3:05 pm

First post

Would O-Rings melt inside of a combustion cannon when it's fired?

Last post

PVC doesn't burn, or melt, so O-rings won't either. Indeed a PVC closed chamber doesn't even warm up significantly during and after firing.

EDIT:...

6 Replies

4466 Views

Last post by wyz2285
Sun Dec 15, 2013 5:47 pm
Question about setup for Combustion cannon

Last post by mark.f
Replies: 3
by vng21092 » Wed Dec 11, 2013 1:29 pm

First post

Is a coaxial setup more/less/equally as efficient as a setup where the barrel is at the end of the chamber? Also, I understand that a silencer...

Last post

Just don't buy it with little flowers. :lol:

3 Replies

3418 Views

Last post by mark.f
Thu Dec 12, 2013 5:22 pm
Want to build first combustion cannon

Last post by jackssmirkingrevenge
Replies: 7
by vng21092 » Mon Dec 09, 2013 8:46 pm

First post

Is PVC strong enough to safely handle the expansion of the gas/fuel when ignited? Also, can the chamber be the same size pipe as the barrel as long...

Last post

I'm not saying it will explode, but an unprimed joint is weaker than a primed one. You might want to try it out from behind cover for the first could...

7 Replies

4118 Views

Last post by jackssmirkingrevenge
Thu Dec 12, 2013 4:35 pm
Hybrid fuel mixing and cold weather

Last post by PeteS
Replies: 2
by PeteS » Sun Dec 08, 2013 11:38 am

First post

Ignition seemed a little flaky in my tests this morning. It was a moderately cold 28 F. It always fired but sometimes took a few button pushes over a...

Last post

That makes sense. I bet the mix was a bit on the rich side. Thanks.

2 Replies

1886 Views

Last post by PeteS
Sun Dec 08, 2013 1:13 pm
Fuel choise

Last post by jackssmirkingrevenge
Replies: 4
by GeoNet » Sun Dec 01, 2013 7:44 am

First post

Hello guys! Im new to spudfiles but not new to spudguns. And right now im making my second one! Just few days back I ordered bbq ignitor from ebay...

Last post

And one more question. Has someone made any dosage system to lighter refillers? My budget isnt that big that I could buy real propane tank and...

4 Replies

3504 Views

Last post by jackssmirkingrevenge
Mon Dec 02, 2013 6:25 am

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