Wanna make big loud bangs "safely"? - Page 3

Fenrys · 2004-01-10, 11:15 PM

The acid melts the aluminum, creating gas in the process.

Do NOT use indoors and do not stand anywhere near it. Acid goes spraying in every direction and the cloud of greyish-yellow smoke it creates will turn your lungs into pudding.

321 · 2004-01-10, 11:17 PM

Is this all legal

and I know it probably is but where could you do this?

Everay · 2004-01-10, 11:19 PM

well, like, outside your city? and thats not smart, dry ice and water is fine, because theres no gas that can kill you, but that right there, is just plain stupid

321 · 2004-01-10, 11:20 PM

Originally Posted by Everay

well, like, outside your city?

If you were talking to me:

What is the difference if it's outside my city or inside? Outside my city is another city

Everay · 2004-01-10, 11:22 PM

go further out, or do it in a empty street. here in my city, outiside the city, is like a 2 minuet drive, and a 30 min drive to my ranch. 10 min to the local paintball ranch.

Squick · 2004-01-10, 11:35 PM

Originally Posted by {BOHICA}Navaron

I don't think it would do anything. PVC is pretty damn strong, I doubt it would blow.

The water serves as an accelerant to the dry ice turning back into gas. Like Vic said, if you don't use water, sometime the ice goes right through the bottle.

Yeah, but the gas has to go somewhere right? If you use PVC cement you can make it 100% air tight. That is why I was wondering if you fill the thing 90% full of dry ice, then fill the rest of the space with a non compressable fluid (like water) then every bit of CO2 has that comes out of the dry ice will have to go somewhere, increasing the pressure.

I am by far not a physics major, but even if sublimation takes a lot of energy to happen, the inside will get super cold and sublimation will slow down, but energy will still get through the PVC.

And if you look at the books you see that heating something like a bar of copper from 0C to 300C will increase the length a very measurable amount; and the force produced by that expansion is absolutely insane, many many millions of PSI I do believe. So I would think the phase change of a substance should create similar forces. That is assuming the pressure to prevent dry ice from sublimating is not less then what it would take to burst a PVC pipe, but I would have no clue what either of those numbers are.

Now I'm gona have to find some dry ice just to see if I can make myself go deaf from 100 yards away...

Everay · 2004-01-11, 12:17 AM

well, the question is, how strong is that cement? because it may be able to keep gas at a normal PSI inside and out, but i dont think it would still hold the lid on if too much pressure was forced on it. so my guess is that the lid will go flying off.

Fenrys · 2004-01-11, 12:32 AM

Originally Posted by 321

Is this all legal

and I know it probably is but where could you do this?

It's legal as long as you don't use it for vandalisim.

Use anywhere isolated. The middle of an empty field, in the woods, ect.

It's a lot safer than bottlerockets and firecrackers.

Squick · 2004-01-11, 01:13 AM

Originally Posted by Everay

well, the question is, how strong is that cement? because it may be able to keep gas at a normal PSI inside and out, but i dont think it would still hold the lid on if too much pressure was forced on it. so my guess is that the lid will go flying off.

Good point, not sure... I was assuming it is the same as wood glue, where the bond is actually stronger then the wood itself.

I know I PVC glued a cap onto a tube once and later had to take it off, and I was absolutely unable to get it off even pounding on a small metal pipe I had on the inside of the cap, I ended up having to just cut the tube and buy another cap..

Doppler · 2004-01-11, 01:42 AM

I have never done this, *wink wink nudge nudge* because its vandalism, and simple assault. I whould never do anything like that oh no. Anyway, you will need.

Dry Ice

Paint cans partialy full or completely full.

Either use the pain cans with the plastic lid or the metal lid lightly pressed down. Go to the person who has offended you recently, plop the can down on the doorstep, pop the ice in close the lid, ring the bell and run like hell. Tape results with telephoto lens.

Everay · 2004-01-11, 01:51 AM

why ring the door bell? the paint can will knock for you.

SkunkPunk · 2004-01-11, 06:26 AM

hmmm can you eat it?, btw i found a safer way to make a loud bang safely, throw a grenade at your neighbors kids

Rayder · 2004-01-11, 11:05 AM

Sure! You can eat dry ice.

Everay · 2004-01-11, 11:39 AM

dry ice is frozen co2, i belive, not sure. co2 is harmful to the body, in it gas form though

Rayder · 2004-01-11, 11:56 AM

... Dry ice is solidified CO2. You never want to touch it without protection, why? Well CO2 is fucking cold, it will give you such a case of frostbite your foot will be in pain if your finger touches it.