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

641307 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

215043 Views

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

Topics

Combustion AT4 (or similar)

Last post by zephir
Replies: 9
by zephir » Sat Jan 19, 2008 4:25 am

First post

I saw the completed pneumatic AT4, but wouldn't a combustion version of the same model be better? (more realistic)

If I decided build the combustion...

Last post

Although I admire your innovation
Thank you

severe loss of power
Ya, I know. many recoil-less rifles have the same problem. those are a cross...

9 Replies

3138 Views

Last post by zephir
Fri Jan 25, 2008 5:20 am
my first combustion cannon. scrap pipe

Last post by invalid-username
Replies: 24
by asianinvasion07 » Tue Dec 18, 2007 7:45 pm
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ok, ive picked up my parts for building my cloud which is being discussed in the bb/airsoft threads...

the plumbing supply store a block from my...

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i tried to make a tennis ball launcer wit the barrel and combustion chamber like that but it did not work. for ignition buy a piezo ignitor just...
24 Replies

6599 Views

Last post by invalid-username
Fri Jan 25, 2008 4:57 am
cold weather

Last post by Deterrent
Replies: 11
by thebergs2010 » Thu Dec 06, 2007 4:35 pm

First post

how bad is it really to shoot a potato gun (with hairspray) in like 29 degree weather...i heard 32 degrees is pretty much the lowest you should go,...

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Oh well, that's better than nothing :)

Edit: I'm having trouble getting ABS pipes, are there other suitable plastics that don't break in the cold?

11 Replies

3109 Views

Last post by Deterrent
Thu Jan 24, 2008 8:39 am
Temperature in a closed combustion chamber

Last post by bigbob12345
Replies: 3
by jimmy101 » Wed Jan 23, 2008 5:44 pm

First post

So, continuing on with interesting things that can be learned from the closed combustion chamber...

Looking at the piezo trace I see a high...

Last post

These tests were done very well
Nice job :thumbright:

3 Replies

1472 Views

Last post by bigbob12345
Wed Jan 23, 2008 8:39 pm
Studies with a closed chamber

Last post by jrrdw
Replies: 14
by jimmy101 » Mon Jan 21, 2008 12:55 pm

First post

I've been working, slowly, on a technical combustion spud gun for several months. The Tech gun is specifically desigend for doing measurements on the...

Last post

The automotive compressor tester has been mentioned before. It should work. (BTW they are not for static pressures, they are peak recording gauges, a...

14 Replies

3695 Views

Last post by jrrdw
Wed Jan 23, 2008 6:17 pm
new gun, where can i get flint?

Last post by jimmy101
Replies: 8
by jackh » Mon Jan 21, 2008 11:10 pm

First post

built my first two guns this weekend. 1st was 2 ft of 3 in combustion chamber to 4 ft of 1.5 in barrel. 2nd was 4 ft of 4 in combustion chamber to 4...

Last post

You should be able to get the flints anyplace that sells lighters.

Most bodegas have'm for smokers who use zippo lighters, look for zippo fuel to...

8 Replies

2649 Views

Last post by jimmy101
Wed Jan 23, 2008 4:09 pm
my first cannon- propane fueled w/ spark plug ignition

Last post by bigbadbrad
Replies: 17
by turbocoop » Tue Jan 01, 2008 9:09 pm
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First post

I was bored one weekend so I started looking up potato cannons online and drew up some plans and heres what I came up with-
Its made entirely out of...

Last post

wow great start. that looks close to ours. you dont need any of that resistor crap. and you can run it off an 6v camping battery just fine. We...
17 Replies

7421 Views

Last post by bigbadbrad
Wed Jan 23, 2008 10:55 am
Rambos Little Brother

Last post by starman
Replies: 16
by utz » Sun Jul 15, 2007 9:34 pm
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Here is another creation that I came up with. Basic combustion, but again attention to detail make this gun special. 3 chamber with 1.5 barrel. New...

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I like the drilled out knob and backside of the intake valve...save a little weight here and there plus looks the part. The aluminum look is also the...
16 Replies

10220 Views

Last post by starman
Tue Jan 22, 2008 9:34 pm
The Black Ops

Last post by RedAplle
Replies: 7
by RedAplle » Tue Jan 22, 2008 8:07 am

First post

Hello,
I'm new on this so nice forum :D.
So my name is Tom, I'm 16 and I'm living in New-Caledonia (in the South Pacific :P).
So the Black Ops was my...

Last post

Why can you only do it up to 50 PSI pneumatic??

Because it's in PVC, and it's not pressure rated...

The green light is the LED for the fan :D....

7 Replies

3403 Views

Last post by RedAplle
Tue Jan 22, 2008 8:45 pm
Change PSI at lower Tempratures... Use the Ideal Gas Law?

Last post by bigbadbrad
Replies: 4
by bigbadbrad » Tue Jan 22, 2008 3:03 pm

First post

In our second generation cannon we decided to convert from Axe Body Spray to a Propane fuel. We figured a better, cleaner burning, fuel would yield...

Last post

I can get 69 PSI in the chamber no problem. even if I charge the meter to 80, release half of the 69 PSI, charge the meter again to 80 and release...

4 Replies

1419 Views

Last post by bigbadbrad
Tue Jan 22, 2008 5:20 pm
French spudgun+ Introduce myself...;)

Last post by Kiwi
Replies: 16
by Kiwi » Mon Jan 21, 2008 5:31 pm
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hi all...

I am a french supdgun-maker, and...It's like when i didn't understand how to make an igniter on french forums...:P

sorry for bad english,...

Last post

On franch board, we saw the 1,2 ratio was bad, and the 1,7 is the best...(for me, very powerfull...350m FANless)
16 Replies

6847 Views

Last post by Kiwi
Tue Jan 22, 2008 12:03 pm
Fan Size and Placement

Last post by ralphd
Replies: 7
by BlackWater18 » Sun Jan 20, 2008 2:57 pm

First post

Hi,

I'm building a new potato cannon and I decided that I wanted to up my cannon a little and put a fan in it. Not really fancy, just to try...

Last post

Try Staples for a fan. I found some in their computer department..pretty cheap too but free is also good.

7 Replies

2411 Views

Last post by ralphd
Mon Jan 21, 2008 6:40 pm
my newest cannon

Last post by mark.f
Replies: 6
by larsul » Mon Jan 07, 2008 9:41 pm

First post

as a kid i always toyed around with the basic combustion cannon, nothing special. but after discovering spud files a few weeks back and seeing where...

Last post

I should also point out that the perfect propane percentage is 4.19%, not 4.02% or 4.03% - which I see hanging around a lot.

Actually, I would...

6 Replies

3632 Views

Last post by mark.f
Mon Jan 21, 2008 5:58 pm
Fixed size barrel, what CB ratio max's the muzzle Velocity?

Last post by jimmy101
Replies: 10
by jimmy101 » Fri Jan 18, 2008 12:43 pm

First post

For a fixed size barrel, what CB ratio maximizes the muzzle velocity?

This question is, in a sense, the opposite of the question Latke's CB studies...

Last post

I've analyzed Latke's 0.75 gasket slug data the same way I did the 1.5 spud data.

The results indicate (and as SpudBlaster suggested) that for...

10 Replies

2706 Views

Last post by jimmy101
Mon Jan 21, 2008 11:41 am
First Cannon Mk1b

Last post by Spitfire
Replies: 7
by Spitfire » Sun Jan 20, 2008 12:25 pm

First post

This is my first cannon that i bulit.
Mk1-First Cannon
b-2nd minor change
Here it is nova.

I am planning on putting propane metering on this week,...

Last post

Store? West Rand plumbing supplies :wink:

Um, Barrel is 2in diameter, 4.9ft length
Chamber, 4.3in dia, 13in length.
all parts of it are comletely...

7 Replies

2632 Views

Last post by Spitfire
Mon Jan 21, 2008 7:58 am
New PB Combustion (I'm back :D)

Last post by frogy
Replies: 24
by frogy » Sun Jan 13, 2008 11:30 am
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First post

Phew!

It's been forever since I posted here...

Last time I visited was 8/9/2006!

I haven't saw many members I remember from the past either :)...

Last post

Posted another gun update...

The gun is now complete!!!

I may take off the grip and repaint it... I chopped the hell out of it while I was trying...
24 Replies

7375 Views

Last post by frogy
Sun Jan 20, 2008 9:55 pm
What Gauge Wire For Stun Gun?

Last post by TurtleVVisperer
Replies: 4
by TurtleVVisperer » Mon Jan 14, 2008 6:54 pm

First post

So I got really frustrated with crappy push-button sparkers, so I bought a 400,000 volt stun gun off eBay for $25 with shipping. Now I want to...

Last post

Oh, your point about the size of the gap is really good. On the stun gun it is about 3/8 inch, I can adjust that in accordance with how much...

4 Replies

3671 Views

Last post by TurtleVVisperer
Tue Jan 15, 2008 5:06 pm
problems with my spudgun in cold weather ...

Last post by king edward
Replies: 10
by nightshot » Mon Dec 17, 2007 7:48 am

First post

hi, i´m new in this forum....
well, my spudgun dont shot anymore... i think is cold weather ...
is this true ?

and sorry for my bad english xD ..

Last post

My cannon was left at my father in laws during our cold weather, I let my 70 year old mother have a go on it out the back of his house and it blew...

10 Replies

3956 Views

Last post by king edward
Tue Jan 15, 2008 4:47 pm
m72a1

Last post by hi
Replies: 6
by quiggly17 » Mon Jan 14, 2008 11:44 pm

First post

well i was searching through youtube and came across this i thought it was worth putting on here

Last post

i loved the you add the normal amount of fuel then he throws it on the ground.

6 Replies

2937 Views

Last post by hi
Tue Jan 15, 2008 12:27 am
CbC (cardboard combustion)

Last post by Carlman
Replies: 13
by pizlo » Sun Jan 13, 2008 3:52 pm

First post

This is my combustion made from cardboard, ductape, hairspray and matches. I am aware of the dangers with fire and cardboard.
To start this off I'm...

Last post

its a rocket car :D

that looks quite amusing after you pointed that out lol

13 Replies

4349 Views

Last post by Carlman
Mon Jan 14, 2008 7:21 am
optimal fan placemeant in specialized cannon

Last post by psycix
Replies: 7
by singularity » Sun Jan 13, 2008 11:44 pm

First post

for quite some time now i have been working on my newest cannon the mortar mk 2. its basically an automated combustion cannon meant for airsoft...

Last post

When putting a fan near the barrel, all air from the chamber has to pass the fan to enter the barrel.
This is not good since the insane airflow on...

7 Replies

1855 Views

Last post by psycix
Mon Jan 14, 2008 6:56 am
The Nuker I

Last post by SpudFarm
Replies: 39
by Nuker » Wed Mar 28, 2007 7:51 am
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The Nuker I - Additional pictures @

Last post

read its two months old he dosent follow this post anymore
39 Replies

16592 Views

Last post by SpudFarm
Sun Jan 13, 2008 1:01 pm
coaxial combustion

Last post by jimmy101
Replies: 10
by Eddbot » Sat Jan 12, 2008 6:18 pm

First post

just wondering if anyone has ever made a coaxial combustion, and if so, how did it work out

Last post

it all depends on how you build it. if you put the barrel all the way down the chamber yeah you will save yourself from lugging however many feet of...

10 Replies

2314 Views

Last post by jimmy101
Sun Jan 13, 2008 12:17 pm
Medium Spud Gun

Last post by bigbob12345
Replies: 5
by The_Kangsta » Fri Jan 11, 2008 5:59 pm

First post

Hey
This is my medium spud gun that i made while i was bored. I made it with things i found around my house. The chamber is a vitamin container, the...

Last post

That looks like a very fun gun you got there.When you just throw a gun together from random parts they are alot more fun to screw around...

5 Replies

2095 Views

Last post by bigbob12345
Sat Jan 12, 2008 12:51 am
thinking about direct injection

Last post by F.E.A.R._Sniper
Replies: 15
by F.E.A.R._Sniper » Tue Jan 08, 2008 9:16 pm
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ok so i was thinking about building a combustion launcher from some 3/4 pvc and a 2 liter soda bottle. I just want it to shoot paintballs at a fairly...

Last post

Thanks for that info jimmy, it will be very helpful when i do get everything to build this monster
15 Replies

4400 Views

Last post by F.E.A.R._Sniper
Thu Jan 10, 2008 5:10 pm

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