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SpudFiles Potato Gun Commercial

Last post by quinn whitsitt
Posted in Combustion Cannons
Replies: 15
by PCGUY » Tue Oct 29, 2013 10:54 pm » in Combustion Cannons
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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...

Last post

thank you for creating this website is there anything i can do to help
15 Replies

1201337 Views

Last post by quinn whitsitt
Fri Feb 09, 2024 2:38 pm
Sketchup Model Library

Last post by mrfoo
Replies: 152
by dewey-1 » Tue Mar 24, 2009 12:12 pm
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First post

Over the last year I have made a lot of CAD drawings for
Pneumatic Launchers.

I have imported several of them into Sketchup format.
Here is the link...

Last post

Bollocks. Dewey put them out in the hope that, and I quote

some of you can make use of these!

There's absolutely nothing wrong with using them,...
152 Replies

626200 Views

Last post by mrfoo
Mon May 20, 2024 11:17 am
Solvent Welding Course Recommended For ALL

Last post by Technician1002
Replies: 46
by sgort87 » Fri Aug 04, 2006 8:18 pm
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First post

Originally posted by DR on the Spudtech forums:

IPEX Solvent Cements ONLINE Course can be found here:

It is recommended that you download and...

Last post

Your earlier post about just scoring the surface, has me wondering if that is why OATEY makes a brush tool that scores the inside of a fitting, and...
46 Replies

336505 Views

Last post by Technician1002
Thu Dec 02, 2010 5:04 pm

Topics

equation

Last post by sgort87
Replies: 8
by mcheesey » Mon May 15, 2006 5:36 pm

First post

is there any equation i should use to find how big to make my chamber and barrel?

Last post

Actually his chamber volume would be 150 cubic inches. His barrel would then need to be 100 CI for the best performance. (according to the 1.5:1 Law...

8 Replies

3306 Views

Last post by sgort87
Wed May 17, 2006 12:53 am
need some info on a muffler

Last post by badkitty
Replies: 11
by badkitty » Mon May 15, 2006 10:34 pm

First post

i didnt want to say silencer,as i hear its illegal to own ...lol....but i made one tonight...14inches long...4 lines of 14 , 3/8'' holes right to...

Last post

well i mactually over it now...i dont need it....but my last post was about the sounds each fuel makes.

11 Replies

4110 Views

Last post by badkitty
Tue May 16, 2006 10:09 pm
C:B Ratios

Last post by Pete Zaria
Replies: 1
by cannon freak » Tue May 16, 2006 9:38 pm

First post

I was just interested in how the chamber to barrel ratios are formulated, im pretty knowledgeable in math and chemistry but I just can't find any...

Last post

Dude... use the search, you would have found 50 threads on this topic in a matter of seconds.

that should answer your question.

The perfect c:b...

1 Replies

1042 Views

Last post by Pete Zaria
Tue May 16, 2006 9:45 pm
First Piston Valve help

Last post by sgort87
Replies: 11
by SpudStuff » Mon May 15, 2006 6:53 pm

First post

I am currently trying to build a barrel sealing piston valve for a mini pnumatic. My problem is that the air leaks out of the barrel most of the...

Last post

Okay, okay. I left out the tee. Geez. Sorry.

11 Replies

3499 Views

Last post by sgort87
Tue May 16, 2006 9:05 pm
Easy to make piston valve, hopefully!!

Last post by SpudStuff
Replies: 11
by Jakal444 » Mon May 15, 2006 4:12 pm

First post

Well, I have always known how useful bike hand pumps are, they are essentially ready made pistons with a removable one way valve at the end.
I use...

Last post

yes it will if you make it like this

Parts List: (The numbers in the diagram correspond to the list; all parts are SCH 40 PVC)

01] 2 90 degree...

11 Replies

4673 Views

Last post by SpudStuff
Tue May 16, 2006 7:26 pm
Building a new ignition, need input

Last post by taranathicus
Replies: 5
by Pete Zaria » Mon May 15, 2006 5:41 pm

First post

Background:
I have an ABS combustion canon with metered propane injection, dual 1/4 spark gaps (made of steel bolts and washers), 80mm chamber fan,...

Last post

i just wrote a hot to on that last week if you have problems with the crappiness of the drawing message me and ill help

5 Replies

2364 Views

Last post by taranathicus
Tue May 16, 2006 4:08 pm
sparker

Last post by FiveseveN
Replies: 9
by Darkside 6ix » Sun May 14, 2006 2:20 pm

First post

i need some ideas of how to make you own spaker. now dont start giving my **** about just getting it off of a barbeque. i already know that but just...

Last post

Any page might be confusing if you don't understand how these things work.
And there's plenty of them out there. Just google Flyback driver , Marx...

9 Replies

3166 Views

Last post by FiveseveN
Tue May 16, 2006 8:52 am
Where do you buy your Cannon Supplies?

Last post by Benny
Replies: 6
by SkunkWerX » Thu Feb 09, 2006 7:30 pm

First post

Where does everyone shop for parts?

I'll list some of the items and places that come to my mind,
please add to it, and we can help each other find...

Last post

i buy from k&d.

6 Replies

3924 Views

Last post by Benny
Tue May 16, 2006 6:19 am
Types of pipe(warning Australians)

Last post by Benny
Replies: 6
by rna_duelers » Mon May 15, 2006 5:57 am

First post

PVC CLASS RATINGS IN AUSTRALIA..... I was looking at the preaasure rating on Austrailain pipes class9,12 and 18 and although our class 18 is the...

Last post

no, thanks now i know what the hell class 18 ect means, thanks mate.

6 Replies

2024 Views

Last post by Benny
Tue May 16, 2006 6:10 am
i need HELP!!!

Last post by ProfessorAmadeus
Replies: 14
by ProfessorAmadeus » Sun May 14, 2006 9:35 am

First post

Im having trouble with my modded sprinker valve and i got the exact same kind as in the How-To and followed all the diretions but when i fill my...

Last post

yeah it works, it actualy works. thanks for all the help

14 Replies

3936 Views

Last post by ProfessorAmadeus
Mon May 15, 2006 8:56 pm
The 3 shot cannon, just an idea.

Last post by Jakal444
Replies: 13
by Jakal444 » Fri May 12, 2006 4:42 am

First post

I had an idea for a cannon that should be able to fire 3 shots semi-auto. It has one large pressure chamber (about 90 cm of 1 pipe), with three ball...

Last post

Well asking me about the type of fittings that you have is rather pointless, since over here it is a different system (gray PVC), but im sure some...

13 Replies

5043 Views

Last post by Jakal444
Mon May 15, 2006 8:30 pm
Typical hybrid fuel?

Last post by fred_roux
Replies: 2
by cannon freak » Mon May 15, 2006 5:14 pm

First post

Hey Im new to this, and just found the site a couple of days ago and I was just wondering if any one here has built some really big and powerfull...

Last post

I use metered propane and it works fine 8)

2 Replies

1749 Views

Last post by fred_roux
Mon May 15, 2006 8:03 pm
a sprinkler valve alternative

Last post by Darkside 6ix
Replies: 9
by A-98 » Sun May 14, 2006 6:52 pm

First post

i am building my first pnuematic potato gun and srinkler valves pose a large problem for me.
my first problem is that i dont have a 24v power source....

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i duno if any u guys watch mythbusters but like last night they had a giant pnuematic chicken cannon. they used a huge butterfly valve with an...

9 Replies

3630 Views

Last post by Darkside 6ix
Mon May 15, 2006 7:41 pm
schrader valve

Last post by A-98
Replies: 13
by A-98 » Fri May 12, 2006 8:41 pm

First post

i have a guestion about installing a shrader valve. i have a automobile type one (it has a bulb on the bottom that seals) and i dont have a drill big...

Last post

lol...yeah it was at 10:30 that i wrote that..i get dilusional at that late hour(its not that late but i was tired any way)

any way i k new that...

13 Replies

4372 Views

Last post by A-98
Mon May 15, 2006 6:57 pm
Axe Injection

Last post by Jakal444
Replies: 7
by CS » Wed Apr 06, 2005 10:08 pm

First post

I was using Axe today when the nozzle popped off and i was wondering if you could use a meter thing similar to a propane one. You would slide a clear...

Last post

This is interesting, I really need to know if this can be done.
I have tried it with clear tubing and the spray just becomes a liquid inside the...

7 Replies

2993 Views

Last post by Jakal444
Mon May 15, 2006 5:42 pm
using a car ignition coil for a really hot sparkl

Last post by jrrdw
Replies: 12
by taranathicus » Mon May 08, 2006 12:36 pm

First post

I made a really simple drawing of how to wire a car ignition coil for use in a spud gun. I have tried this to great success. though it did take me a...

Last post

It's easy to kill a coil. Yes they are inductive, but if you understand polarity, then you will know what i meant. 12 volt negitive ground is...

12 Replies

11323 Views

Last post by jrrdw
Mon May 15, 2006 3:59 pm
gas leakage

Last post by Andrew52
Replies: 9
by adama » Sat May 13, 2006 7:57 pm

First post

Has any one had problems with fumes leaking out the back of the gun when they ram the projectile down?

I built a BBQ igniter into a cap for my gun...

Last post

yah i bet that would also be nice for fueling if using the spray n pray method

9 Replies

2846 Views

Last post by Andrew52
Sun May 14, 2006 10:22 pm
tight fit bullet

Last post by Andrew52
Replies: 23
by neilman88 » Tue Oct 25, 2005 8:30 pm
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ive noticed that the more snug the ammo is the louder and faster AND harder it shoots

this is because the explosions work even harder to get oxygen...

Last post

yah i learned that on one of my guns tripple a's fit snug in blowgun barrels and i took it up to a hunred psi and it only went like 20 feet
23 Replies

7988 Views

Last post by Andrew52
Sun May 14, 2006 10:20 pm
Recoil Question

Last post by sgort87
Replies: 11
by Atlantis » Fri May 12, 2006 10:26 pm

First post

Not really recoil but...I was wondering if I used Galfisk's pump-action design and used the force acting on the ammo to slide the bolt forward and...

Last post

Do you now? So by the flip of a switch, everything is activated?

The Proton Pack has been pretty practical so far. I'm not sure what you mean by...

11 Replies

3512 Views

Last post by sgort87
Sun May 14, 2006 9:32 pm
plans confuseing me

Last post by pyromanic13
Replies: 18
by pyromanic13 » Sat Apr 29, 2006 6:28 pm
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how does the bolt return to position? ........spring pushs the bolt (greenpart) forward and somehow the bolt returns to postion?

Last post

but do you think the air pressure would be high enough?/
18 Replies

4637 Views

Last post by pyromanic13
Sun May 14, 2006 8:38 pm
Triggered Burst Disk 3

Last post by FiveseveN
Replies: 11
by saladtossser » Mon Apr 24, 2006 6:13 pm

First post

here is my idea

Last post

Have any of you seen a resistive element go from cold to glowing in 0.001 seconds? You'll never see one, unless it's on a one-way train to vapor...

11 Replies

4747 Views

Last post by FiveseveN
Sun May 14, 2006 8:19 pm
Maximum speeds

Last post by boilingleadbath
Replies: 2
by shockwave » Sun May 14, 2006 12:01 pm

First post

Whats the maximum output velocity of a pneumatic powered by air (in theory, discarding all the other variables)? Allso what are the speeds for other...

Last post

To expand appon my quoted words there, here's a formula you can use to calculate the speed of sound of the air. (this is for room temperature)

(max...

2 Replies

1970 Views

Last post by boilingleadbath
Sun May 14, 2006 5:16 pm
propane powered gun

Last post by sgort87
Replies: 8
by death of doom » Fri May 12, 2006 7:23 pm

First post

hey i have a 40 scheduled combustion gun. i was wondering if it is ok to put a valve and then propane cylender on it. i have the y adapter as the...

Last post

Yes, and yes.

Apparently this message is too short to allow posting so I am typing this sentence down here.

8 Replies

2773 Views

Last post by sgort87
Sun May 14, 2006 1:22 pm
Hydrogen or oxygen used in an peumatic.

Last post by sgort87
Replies: 16
by rna_duelers » Sun Apr 30, 2006 6:37 am
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First post

Now i have been toying with the idea of using hydrogen or O2 in a pneumatic cannon as i heard it is cappable of reaching suppersonic speeds with with...

Last post

What the FORK is wrong with you Sam?!
16 Replies

6477 Views

Last post by sgort87
Sun May 14, 2006 1:20 pm
taking apart a long nosed lighter

Last post by mike4567
Replies: 10
by mike4567 » Sat May 13, 2006 6:00 pm

First post

can someone plzz tell me how to take apart a long nosed lighter and use the sparker on it..i have an old one that works i just need to know how to...

Last post

i dont know why i posted this here..sorry...i got it apart and on my mini and its fine..thanx guys..

10 Replies

16736 Views

Last post by mike4567
Sun May 14, 2006 12:27 pm

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