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

945020 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

305469 Views

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

Topics

Combustion spud gun problem

Last post by saefroch
Replies: 32
by da007man » Sat Apr 23, 2011 4:29 am
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HI, I just made a combustion type spud gun with a piece of 80mm PVC (combustion chamber) and a long piece of 32 mm PVC(barrel). I use a piezoelectric...

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So don't double-post...

Double-posting is acceptable when you have something significant new to add. If you had just edited the post instead of...
32 Replies

11729 Views

Last post by saefroch
Thu Jun 23, 2011 9:54 pm
Ideas for igniters

Last post by evilvet

by evilvet » Wed Jun 22, 2011 1:27 am

This came across my desk from another forum

I don't do combustion as Mr plod takes a rather dim view in this part of the world. Perhaps some of...

0 Replies

4590 Views

Last post by evilvet
Wed Jun 22, 2011 1:27 am
chamber diameter and length combination?

Last post by cfb_rolley
Replies: 8
by cfb_rolley » Fri Jun 17, 2011 3:42 am

First post

So I was about to start embarking on my next cannon design since my very first DWV cannon developed a crack (and therefore I had to stop using it...

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hmm, didn't think of that either, thanks for that one.

8 Replies

2591 Views

Last post by cfb_rolley
Sat Jun 18, 2011 10:06 am
The BAO-585

Last post by lukemc
Replies: 2
by lukemc » Sun Jun 12, 2011 12:29 pm

First post

After a long hiatus from the spudding industry I decided to make my last summer before college a good one and invest in a top-o-the-line combustion!...

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In a bit! doing some damage shots with ice and will get back to you

2 Replies

3451 Views

Last post by lukemc
Fri Jun 17, 2011 2:09 pm
Home made sparker systems?

Last post by shmoesus
Replies: 6
by shmoesus » Sun Jun 12, 2011 6:26 pm

First post

Hi, I need some help again!!
Ok so I am trying to make a sparker system for my new combustion system but here is the catch, I dont want to buy...

Last post

Thanks I'll just use the disposable camera.

6 Replies

2489 Views

Last post by shmoesus
Mon Jun 13, 2011 2:52 am
Help dismantling an electric BBQ igniter

Last post by warhead052
Replies: 11
by eXodus31337 » Sat Jun 11, 2011 5:08 pm

First post

I'm dismantling an electric BBQ igniter so I can fit it in the wooden handle of my spud gun.

I'm both ignorant and the biggest wuss when it comes to...

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Ah ok. Yeah, just use a regular sparker. It would be easier, but may not yield take a bit more time to fire off.

11 Replies

3559 Views

Last post by warhead052
Sun Jun 12, 2011 5:19 pm
chamber to barrel connection design

Last post by saefroch
Replies: 4
by JDP12 » Thu Jun 09, 2011 11:38 pm

First post

So i'm currently working on a gun, that I don't quite want to reveal yet. It's going to be based upon a video game gun, and will have a 1 barrel, and...

Last post

extra surface providing drag to the flow I thought I showed that this isn't a factor with any reasonably smooth surface...

Depending on what you're...

4 Replies

2803 Views

Last post by saefroch
Fri Jun 10, 2011 3:34 pm
Automatic potato gun found on youtube

Last post by jackssmirkingrevenge
Replies: 15
by metalmeltr » Wed Jun 08, 2011 10:39 am
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15 Replies

8596 Views

Last post by jackssmirkingrevenge
Thu Jun 09, 2011 11:46 pm
Micro Pump Combustion

Last post by PVC Arsenal 17
Replies: 8
by PVC Arsenal 17 » Tue Jun 07, 2011 12:17 am

First post

Most of my previous projects to date have been powered by HPA or CO2. That's all well and good, but expensive and difficult to use at times. I...

Last post

Interesting thoughts, I was wondering if something like that was taking place. The problem seems to have gone away after I lubricated the combustion...

8 Replies

4283 Views

Last post by PVC Arsenal 17
Thu Jun 09, 2011 4:06 pm
continuous camera tazer

Last post by jimmy101
Replies: 6
by big_boom » Mon Jun 06, 2011 4:26 am

First post

hi
so i was trying to make an ignition source from a disposable camera, but somehow, sometimes as soon it is sparks, it just keeps recharging. on...

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250K is high enough value it won't need a switch, but will continuously bleed the capacitor down at a slow rate.
Not for a typical disposable...

6 Replies

2423 Views

Last post by jimmy101
Tue Jun 07, 2011 4:22 pm
propane meter

Last post by Crna Legija
Replies: 18
by sprayandprayboy » Sun Jun 05, 2011 7:57 pm
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hi all im new here. i have a gun that was spray and pray but i changed it to propane and it doesnt work :x i used the fuel tool

and it still...

Last post

ahhh yea i got is mixed up :oops:
18 Replies

3913 Views

Last post by Crna Legija
Mon Jun 06, 2011 11:11 pm
Al/H2O Reactions

Last post by inonickname
Replies: 42
by DYI » Sun Feb 20, 2011 12:06 pm
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First post

Firstly, I'd like to point out a slight inconsistency in the posting rules regarding explosive propellants :

Solid propellant: Any substance...

Last post

Well, if your magical construction is up for another shot...

Another coin? :lol:
42 Replies

19257 Views

Last post by inonickname
Sun Jun 05, 2011 4:44 am
combustion cannon

Last post by shiny455
Replies: 2
by shiny455 » Fri Jun 03, 2011 12:26 am

First post

i built this a couple years ago now but only just started using syringe fuelling and a piezo to ignite it. roughly 1.2m barrel, 7.6L chamber and 5.3L...

Last post

yeah ill film it and post it up on here not sure when ill get around to it though i dont think it would be much appreciated if i shot it at home and...

2 Replies

2280 Views

Last post by shiny455
Fri Jun 03, 2011 12:34 am
Help with my gun

Last post by Crna Legija
Replies: 5
by bennettjackson » Tue May 31, 2011 10:18 pm

First post

hey everyone, i know this might be a bit much to ask for but is anyone willing to help me out if i send them my gun(detachable barrel so not too big)...

Last post

yeah, for how long?

idk your the one doing it

5 Replies

1983 Views

Last post by Crna Legija
Thu Jun 02, 2011 6:52 am
small breech loading gun mounted on homemade tank

Last post by warhead052
Replies: 14
by Runningman5 » Tue May 31, 2011 1:20 am

First post

After searching the internet and not finding what I wanted; I built this cannon for the tank I am putting together. Has anyone seen anything like...

Last post

Try ebay, or try the paper towels and bb rounds.

14 Replies

6984 Views

Last post by warhead052
Wed Jun 01, 2011 6:06 pm
Advanced combustion cannon w/ break action breach load

Last post by Combustionjunction
Replies: 11
by jook13 » Wed Mar 16, 2011 11:43 pm

First post

Its been a long time since I have posted on this forum. I recently got my tax return and decided it was time to start building again :twisted: .
I...

Last post

Looks good try using a difrent fuel propane might be to hard to ignite with a small spark try body spray see if that works if it does try propane...

11 Replies

7933 Views

Last post by Combustionjunction
Tue May 31, 2011 11:50 am
Old PVC cannon, still safe?

Last post by jimmy101
Replies: 6
by dippert » Sat May 28, 2011 11:40 am

First post

I built a cannon a few years ago. The chamber is 4 sch40 PVC from McMaster. It's been sitting in my garage at my apartment for the last 2 years....

Last post

Well,PVC does not readily degrade when exposed to sunlight (ultraviolet radiation) due to natural UV inhibitors present in the material. Short-term...

6 Replies

2623 Views

Last post by jimmy101
Mon May 30, 2011 10:24 am
post launch ventilation?

Last post by Lockednloaded
Replies: 2
by bennettjackson » Sun May 29, 2011 4:56 pm

First post

hey, does anyone know if after combustion there is still propane in the chamber hence the need to ventilate using a fan to get knew oxygen in the...

Last post

The product is co2 and water, and both of those would hamper the combustibility of the mix you add afterwards

2 Replies

1909 Views

Last post by Lockednloaded
Sun May 29, 2011 6:19 pm
check valve for syringe fueling

Last post by jimmy101
Replies: 4
by shiny455 » Sat May 28, 2011 5:55 pm

First post

i've had a pvc combustion for about a year now and it was originally a spray and pray but ive decided to use a syringe to fuel it. i got the syringe,...

Last post

COuple things that work well.

1. Install a schrader valve and then remove (permanently) the stem. A syringe needle fits through the valve body...

4 Replies

2264 Views

Last post by jimmy101
Sun May 29, 2011 3:45 pm
Need help with school project

Last post by mafaka
Replies: 39
by mafaka » Fri Apr 01, 2011 10:20 am
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First post

Hello spudfiles!
I have lurked around here for quite a while and have finally made an account so I could ask you guys a question.

I am doing a...

Last post

Hello again guys!
Sorry for the late update, the report for the project was handed in 2nd May and we got the best grade possible for doing it. (MVG...
39 Replies

13845 Views

Last post by mafaka
Thu May 26, 2011 5:30 pm
Nichrome Ignition

Last post by mobile chernobyl
Replies: 48
by Hubb » Tue May 17, 2011 7:24 pm
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I was looking at Larda's hybrid yesterday. The ignition system for this beast uses a thin wire connected to a low voltage source to ignite the...

Last post

Just get a nice little SCR and trigger it. I use them on my capacitor banks dumping many more volts than a standard photo cap without any problem....
48 Replies

15275 Views

Last post by mobile chernobyl
Wed May 25, 2011 10:23 pm
HHO as fuel?

Last post by Zeus
Replies: 10
by budabob07 » Sun May 22, 2011 8:48 am

First post

Would HHO work as a fuel in a standard PVC combustion gun? I'm guessing that the force of the explosion would shatter the PVC. Has anyone tried this?

Last post

Ah the big drama around that omnipresent poison DHMO. That was nearly banned out here (Aus). Possibly the best troll in existance, even better than...

10 Replies

3302 Views

Last post by Zeus
Sun May 22, 2011 6:37 pm
propane tanks

Last post by jimmy101
Replies: 4
by bennettjackson » Sat May 21, 2011 7:30 pm

First post

does anyone know how much propane is in a tank?

Last post

The standard Bernzomatic Propane cylinder contains 14.1oz (400g) of propane. It says so on the label.

Beyond that, how much propane is in a tank is...

4 Replies

3800 Views

Last post by jimmy101
Sun May 22, 2011 12:10 pm
Sureshot BL-525 and UHMW compound rounds

Last post by Technician1002
Replies: 15
by jagerbond » Mon Aug 03, 2009 6:01 am
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5 chamber
2.5 barrel
1.25:1 C:B ratio
All the Sureshot goodies, P-mount for fuel and site mount.

UHMW Compound Round
4.375 Length
265 grams
.5...

Last post

If you get the same results that I get with small diameter dense projectiles with a low mass sabot, you should be able to punch some holes in that...
15 Replies

8627 Views

Last post by Technician1002
Thu May 19, 2011 8:32 pm
Taser help

Last post by Hotwired
Replies: 1
by wyz2285 » Wed May 18, 2011 2:46 pm

First post

Hi everybody.
As taseres aren´t legal in my country, My dad bought me one in China.
To be able to pass the airport, I asked him to separed the taser...

Last post

Two wires for the battery two for an on/off switch.

Wouldn't take that long to work it out just by trial and error.

Just to be sure, you know the...

1 Replies

1289 Views

Last post by Hotwired
Wed May 18, 2011 3:16 pm

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