Author Topic: Building a spud gun: Tips / Tricks?  (Read 8788 times)


POTATO LAUNCHER
SPUD GUN
TATER CANNON
SPUDZOOKA

Call it what you will, but the result is the same: forgetin' AWESOME


      


Disclaimer: you MUST check your local state and city legislation before even bothering with building a potato launcher. Some states have outright outlawed spud guns (California), whereas some states recognize them as firearms (parts of Florida). If you want to read more, go HERE, but keep in mind that it may not be legal to build, own or fire potato launchers in your area. They should be treated as firearms as well: finger off the trigger until ready to fire, don't point at anything you don't want to hurt, and keep it unloaded until ready to fire.

A lot of people know what a spud gun is already, but JUST in case you don't know, you should probably crawl out from under the rock you're living under here is the definition by wikipedia:
Quote
A spud gun (also known as a potato cannon or a spudzooka) is a pipe-based cannon which uses air pressure (pneumatic), or combustion of a gaseous fuel, to launch projectiles at high speeds. They are built to fire chunks of potato, as a hobby, or to fire other sorts of projectiles, for practical use. The projectile can be dangerous and result in life-threatening injuries, including cranial fractures, if a person is hit.

THE PROJECT
My dad and I MIGHT build a potato launcher modified to launch tennis balls for our dog. We have a couple ideas in mind, and I've been working on putting together information to build it, as well as talking to people who have experience with potato launchers in general. I've created this topic both to learn more about potato launchers, and maybe inspire some members of the BL community to either post their already made spudzookas or create their own. If I do go through with the creation of a potato cannon, I'll see about posting pictures of it. If you have knowledge of pneumatics, potato cannons or air compression powered weaponry, please share it here (for science), and maybe learn something from someone else as well.

If you you're interested in building a potato launcher and want a good place to start, take a look through these links:
How to build a spud gun
Electric powered spud gun
Launch supersonic spuds with a PVC cannon! <-- recommended
25mm pneumatic sniper rifle
Formufit.com  (website specializing in PVC piping)


AdinX's to-do list & planned features:
mounted tennis ball launcher, maximum range of 100ft, below 15lbs, air compression + simple firing mechanism
• complete blueprints for entire project
• purchase materials for entire project (projected cost: $80)
• Assemble quadropod mount for launcher (solid PVC structure, weights in bottom of legs, estimated height: 3')
• Assemble double rotary joints for launcher mount (up-down/left-right)
• Assemble air chamber (preferably max of 300 PSI capacity)
• Assemble release mechanism (probably going to use a sprinkler valve like in the 3rd link)
• Assemble primary barrel
• connect air chamber, release mechanism and barrel
• test fire at 50PSI
• test fire at 100PSI
• test fire at maximum capacity
• go to local park, attach cannon to tripod, take dog off leash, fire at will
« Last Edit: January 16, 2014, 09:00:12 PM by AdinX »

You could do it more simply with just a combustion chamber pipe, a grill igniter, and a barrel pipe.
Oh and something to plug/cover the combustion chamber after applying the flammable stuff.


You could do it more simply with just a combustion chamber pipe, a grill igniter, and a barrel pipe.
Oh and something to plug/cover the combustion chamber after applying the flammable stuff.
To my understanding of my local laws, that's illegal. However I think compressed air is okay where I live (still checking)

That and using a gas just seems way more dangerous than I'm willing to go for, considering it's only launching tennis balls, however someone else could take this to heart for their own project.

I have two cannons. One is air powered (pump or compressor) and the other is combustible (usually hairspray).

Both can do > 300 feet easy.

Put a potato on the end of a real gun.

360 noscope someone's house

To my understanding of my local laws, that's illegal. However I think compressed air is okay where I live (still checking)

That and using a gas just seems way more dangerous than I'm willing to go for, considering it's only launching tennis balls, however someone else could take this to heart for their own project.
Oh, lame. Its a lot simpler and inexpensive

Put a potato on the end of a real gun.

then watch as the gun blows up in your hands

buy a old disused bazooka, plug up one end, and load it with gunpowder and potatos

then watch as the gun blows up in your hands
thats not how guns work

then watch as the gun blows up in your hands
This isn't a 1940s cartoon.

you can never have too much compressed air

I have two cannons. One is air powered (pump or compressor) and the other is combustible (usually hairspray).

Both can do > 300 feet easy.
pics?
for science

Just have something like a modified leaf blower, and a system where tennis balls drop down into the chamber which fires them out.
let gravity do the work.

My cousin actually made a spud cannon that shot a bagloads per shot, but he only fired it once cause my aunt's a killjoy.