Building for the biggest "Boom" sound

[rootuser]

Hello everyone,

I'm fairly new to spud guns so please bear with me.

I have built a rocket launcher type cannon already and it works fine. I have a general idea of how to put things together at this point.

My question is:

I would like to build a pneumatic launcher that is basically designed to make the biggest "boom". I am actually not concerned with launching any kind of projectile from it really, and accuracy is not at all needed. Since fire = bad in California's dry climate, I would like to stick to pneumatic to do this. CO2, Air, whatever I don't really mind. I am trying to make as big a noise as possible without the use of combustion essentially.

[Ranger]

A burst disc make a lot of noise, I have a little 3/4" burst disc Here that makes a big bang.

[kydavies]

use a ball valve in combonation with a burst disk


edit damn it Ranger you beat me to the post while i was doing my drawing


use a ball valve and a burst disk its safer

[clemsonguy1125]

Also use a short barrel

[rootuser]

Thanks for the quick response. I'm not sure I understand how the burst disk is inserted and re-inserted etc but I am sure I Can figure it out. Is there any video any place or sound file anyone has so I can hear one of these?

[SpudFarm]

I'm not sure I understand how the burst disk is inserted and re-inserted

Look in the "hybrid showcase" sub-forum and you will see alot of burst disk guns. They are not pneumatic but you can use the disk setup from them.

Unions is what's used the most.

[Ranger]

Here's Where I got my idea. Also some of his videos

[youtube][/youtube]

[youtube][/youtube]

Basically (well technically ) Its a piece of duct tape inbetween a coupler and another piece of pipe. When air is applied the tape bursts and makes a loud POW!

Hint. Sand the coupler and the pipe so that they are a very loose fit this way the duct tape will not be hard to load.

@kydavies:

[Technician1002]

On this page there is a sound recording of a 1 inch fast piston valve dry fired at 80 PSI. A burst disk will have more of a pop sound as it opens faster. Fast piston valves are loud with a short barrel. Burst disks are even louder.
http://www.spudfiles.com/forums/present ... 21108.html The sound file is a wav near the bottom of the first post saved as a zip file. A larger cannon will make a bigger sound.

[Gun Freak]

Well I'll tell you what, when I put a 2" tee with a hole in the middle on the end of my 1.5" GB barrel, it makes the most piercing bang I have ever heard at 60 psi, I don't dare go 100 psi.... it is a 2" piston valve with a massive 2" chamber BTW.

[kydavies]

Ranger, a ball valve in combo with a burst disk is mych safer cause you know when its going to go off

[hi]

Yep, short barrel and burst disk is going to make a lot of noise. definently have a valve behind the burst disk so you know when its going to fire.

[Gun Freak]

With a tee muzzle break on the end...