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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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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

1563430 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

751029 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

408704 Views

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

Topics

First 12kJ railgun shot

Last post by jackssmirkingrevenge
Replies: 29
by rp181 » Thu Jan 21, 2010 8:05 pm
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First post

I fired off a shot today, and had quite bad results. This was probably due to the fact
projectile fit could have been better (see pics)
error in...

Last post

Actually, Its opposite magnetic principles.

Fair enough, I might have oversimplified the science ;)

For those of you who remember what I'm...
29 Replies

8614 Views

Last post by jackssmirkingrevenge
Mon Jan 25, 2010 1:16 am
Pop-sci has been on here...

Last post by ramses
Replies: 12
by john bunsenburner » Sun Jan 24, 2010 3:49 am

First post

The last Popular Science magazine i've been reading had not one but TWO spudgun related reports!

One was of a hydrogen powered launcher, along the...

Last post

Apparently you didn't read the table of contents. They gave a link to A Pneumatic Hot-Dog Cannon

It uses a tiny solenoid valve to actuate an air...

12 Replies

3569 Views

Last post by ramses
Sun Jan 24, 2010 7:58 pm
Cool photos, post your own

Last post by rcman50166
Replies: 11
by linuxexorcist » Thu Jan 21, 2010 10:44 am

First post

I thought it would be interesting to see what cool images this community has generated, so if you've got a photo that is just awesome, put it up...

Last post

Oh I didn't know someone was replying to my post. Sorry for the Delay. It is from a Pumpkin Chunkin contest in Greyledge farms in CT. The ammo is...

11 Replies

4447 Views

Last post by rcman50166
Sun Jan 24, 2010 10:47 am
Spudgun in the News

Last post by inonickname
Replies: 35
by ralphd » Thu Oct 23, 2008 11:30 am
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I guess the Police have eliminated all crime and need things to do.....

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if your gun is small enough to carry in a non-suspicious container, never heard of pedestrians or bikers carrying a guitar case, or a back pack...
35 Replies

13164 Views

Last post by inonickname
Sun Jan 24, 2010 9:10 am
This Sucks!!!

Last post by paaiyan
Replies: 10
by jeepkahn » Sat Jan 23, 2010 4:51 pm

First post

:twisted: :D

Behold the power of Vacula ...

Did this while bored at work today... Used my aspirator/vacuum pump to crush a 30gal brake cleaner...

Last post

Well the effectiveness is limited by the strength of the vacuum, the ease of movement of the piston, the amount of ventilation in the rear, the...

10 Replies

3834 Views

Last post by paaiyan
Sun Jan 24, 2010 12:45 am
PVC dye

Last post by Technician1002
Replies: 12
by jagerbond » Wed Jan 20, 2010 7:55 pm

First post

Anyone dyed PVC before? We've been experimenting with some dye formulas and stumbled on something that seems to work quite well.

Check out the...

Last post

For adding printing and full color photos, the PVC should work with a dye sublimination printing process. I haven't tested it on pipe, but it works...

12 Replies

6690 Views

Last post by Technician1002
Thu Jan 21, 2010 3:54 pm
Question for users of GGDT...

Last post by btrettel
Replies: 5
by D_Hall » Wed Jan 20, 2010 9:35 am

First post

We all know GGDT gets wonky in the transonic region.

Question: Does GGDT tend to over or under estimate velocities? I suspect I know the answer, but...

Last post

D_Hall, you might find this thread helpful for this purpose:

on another note, concern heating and cooling of the gases in the barrel, when looking...

5 Replies

4702 Views

Last post by btrettel
Wed Jan 20, 2010 3:05 pm
Hey guys! Long time

Last post by The Blight
Replies: 7
by The Blight » Sun Jan 17, 2010 7:31 pm

First post

I still recognize some user names on here, so everyone can't have left.

For all of those that don't know me, I used to post regularly on the...

Last post

Doesn't seem like theres that many left actually, but I guess so.

7 Replies

6128 Views

Last post by The Blight
Mon Jan 18, 2010 7:00 pm
The Theory of High Speed Guns by Arnold Seigel (a book)

Last post by D_Hall
Replies: 3
by btrettel » Fri Jan 08, 2010 4:30 pm

First post

Here comes yet another thread I bet only one or two will be interested in... I figure D_Hall might find this useful for the light gas gun simulation...

Last post

Thanks for the document and the inspiration to register at DTIC. :)

3 Replies

1635 Views

Last post by D_Hall
Sat Jan 16, 2010 6:57 pm
Question about steel pipe

Last post by artillerycreations
Replies: 5
by Heimo » Fri Jan 15, 2010 10:01 am

First post

I am going to be building a hybrid soon and I picked up a piece of steel pipe today to use for the chamber, I am looking at maybe a 5x -10x hybrid...

Last post

Your best bet is to clean off the pipe and inspect it. If something that big blew up at 10x and you where anywhere near it there would be hell to...

5 Replies

1892 Views

Last post by artillerycreations
Fri Jan 15, 2010 11:27 am
Easy DIY regulator

Last post by inonickname
Replies: 12
by MRR » Sun Jan 10, 2010 3:01 pm

First post

After watching some diagrams about regulators I decided to make my own.

The following device is based upon this little diagram:

My regulator...

Last post

800 psi wouldn't be out of the question for a 1/2 brass tee, so it could regulate CO2 if made well.

Considering the force exerted by high pressure...

12 Replies

5816 Views

Last post by inonickname
Tue Jan 12, 2010 10:23 am
Basic revolver action

Last post by Solar
Replies: 8
by tghhs » Mon Jan 11, 2010 8:33 am

First post

Hey guys,
I really like the asthetics of a revolver and always thought a combustion one with pre-loaded cartridges would be sweet.

But i really...

Last post

There are lots of ways to make a revolver action. I went through a process of different indexing mechanisms like ratchets and escapements with...

8 Replies

5148 Views

Last post by Solar
Tue Jan 12, 2010 4:38 am
5" pvc

Last post by CS
Replies: 3
by spudkid10 » Mon Jan 11, 2010 12:51 am

First post

This is kind of a stupid question, but I was wondering if anyone knew where I could buy five inch pvc? I want it for my next project, I'm planning a...

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Do you specifically need 5 pipe, or would 4 /6 pipe work? I will tell you with certainty 5 pvc plumbing is rare. I live in the desert so we have a...

3 Replies

1875 Views

Last post by CS
Mon Jan 11, 2010 6:32 am
where can i buy qev

Last post by MrPed
Replies: 5
by far_cry » Sun Jan 10, 2010 10:47 am

First post

does anyone know where to buy qev on the net include shipping world wide except eBay?

i found this in eBay

38 $ include shipping is that good...

Last post

I just bought this the other day:

But, I have yet to test it. When I get around to testing it I will let you how it goes.

5 Replies

2735 Views

Last post by MrPed
Sun Jan 10, 2010 9:35 pm
7 x 12 Mini lathe bargain

Last post by Demon
Replies: 25
by Demon » Sat Dec 26, 2009 8:03 pm
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Today, the price of the 7 x 12 mini lathe from Homier dropped (even if the price was low 450$, normally 500$) to 372$

I just bought one :toothy7:...

Last post

Nope, the tool was in a perfect state.

Its now fully cleaned and adjusted, i need to buy a grinder, cutting oil and a starter kit with some hss tool...
25 Replies

10910 Views

Last post by Demon
Sat Jan 09, 2010 2:08 pm
spudgun actually used by "pirates"!

Last post by jrrdw
Replies: 33
by jackssmirkingrevenge » Wed Jan 06, 2010 8:30 am
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First post

Have a look here , looks like a QEV pneumatic.

Wankers got exactly what they deserve in my organically grown sustainably farmed opinion :D

Last post

Ummmmm at this point it can go to Theopia, unless PCGUY or another mod whats it to go any further here, they can open it back up... other wise any...
33 Replies

8163 Views

Last post by jrrdw
Thu Jan 07, 2010 6:26 am
Vortex Ring Gun (NOT BBMG)

Last post by Tidbit77
Replies: 6
by Tidbit77 » Tue Jan 05, 2010 9:09 pm

First post

Once upon an English 9 class dreary ...I remembered a video I had seen of a large combustion powered vortex gun , kind of like those smoke ring guns...

Last post

Ok, you should expect a physical result around late February, I'm very busy at the moment with a huge science fair project and midterms.

6 Replies

4852 Views

Last post by Tidbit77
Wed Jan 06, 2010 7:13 am
Darts, aerodynamic jump, and freeflight....

Last post by jeepkahn
Replies: 6
by jeepkahn » Sat Jan 02, 2010 3:40 pm

First post

Stumbled across this article for KE round flight characteristics, and thought it might come in handy for those of us that are into advanced...

Last post

My only concern with porting is that if you have a tight fitting projectile and the porting isn't perfectly calculated, then there will be a breaking...

6 Replies

4036 Views

Last post by jeepkahn
Tue Jan 05, 2010 10:01 am
Combustion Vortex Block

Last post by inonickname
Replies: 5
by kjjohn » Sun Jan 03, 2010 1:08 pm

First post

I was doing some research for my upcoming pulse jet project (I'll be starting as soon as I'm done with my piston hybrid), when I thought of an idea....

Last post

Pulse jets are very touchy. If you choke the airflow or exhaust the engine will not appreciate it and stall immediately. You will not be able to use...

5 Replies

2106 Views

Last post by inonickname
Sun Jan 03, 2010 8:13 pm
large low velocity projectiles and safety issues

Last post by chinnerz
Replies: 5
by jackssmirkingrevenge » Fri Dec 18, 2009 10:40 am

First post

bad luck but it can happen :?

Last post

Talk about realistic gameplay...

i loled :P

5 Replies

1568 Views

Last post by chinnerz
Thu Dec 31, 2009 9:30 pm
Sch 10 aluminum pipe for golf balls?

Last post by D_Hall
Replies: 36
by D_Hall » Mon Feb 02, 2009 7:22 pm
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Has anybody tried it?

mcmaster part num: 4561T512

Schedule 10
Pipe Size 1-1/2
Length 36
Inside Diameter 1.682
Outside Diameter 1.9
Wall...

Last post

LOL... Sorry, the hybrid is still a ways off (although I'll use the same breech and barrel assembly when that time comes). This one was just...
36 Replies

14322 Views

Last post by D_Hall
Tue Dec 29, 2009 11:55 pm
Keeping Mini Vortexes at Hand

Last post by clemsonguy1125
Replies: 3
by thedeathofall » Tue Dec 29, 2009 2:28 pm

First post

Alright, so its been a looong while since I have made any serious posts here. I'll be honest, I have been really busy. I have been away at school...

Last post

I use the same type of attachment for attaching guns to my wall

3 Replies

3734 Views

Last post by clemsonguy1125
Tue Dec 29, 2009 8:33 pm
Homebuilt Phototransistor Chronograph

Last post by jimmy101
Replies: 18
by boyntonstu » Wed Nov 18, 2009 1:20 pm
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A FEW POINTS:

1. Start Audacity recording and note the time of the shot on your watch.
Go to your PC and stop recording a minute later.
Look back...

Last post

Like rp181 said. Any incandescent will probably work OK. Fluorescents are out. Sun light will probably be the best thing other than IR LEDs.
18 Replies

13906 Views

Last post by jimmy101
Tue Dec 29, 2009 3:57 pm
Universal Sight / Accessory Mount

Last post by jagerbond

by jagerbond » Sun Dec 27, 2009 4:31 am

Happy Holidays to everyone.

I got a couple of requests for these and figured I would post to let everyone know they are now available. This...

0 Replies

2816 Views

Last post by jagerbond
Sun Dec 27, 2009 4:31 am
How does the venturi effect work?

Last post by jimmy101
Replies: 7
by kjjohn » Fri Dec 25, 2009 4:19 pm

First post

I have heard of the venturi effect, and I know it can help alot with fuel metering. I also know that it has something to do with a pressure...

Last post

thats what a propane torch does. You need to make an adjustable one, and play with until it is good.
That's what a lab Bunsen burner is. Trivially...

7 Replies

12442 Views

Last post by jimmy101
Sat Dec 26, 2009 12:41 pm

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