How much air pressure can a standard 2 liter soda bottle hold before you get into the danger zone?

They seem plenty safe at 120 PSI to me, but I want to know how high I can get it before I start Kerrying my butt with plastic shrapnel. Are they good for 150 PSI?

 

No idea. But I do think you need a hobby. Or a new one, as the case may be...

 

Truck Modifications: Starts at 1,000 dollars.
Soda Bottles: .79 dollar each.
Booze: At least 40 dollars to do it right.
Crime: Doesn't Pay.
Pyrotechnics: Have you seen the price of gas recently?
Paintball: 100 X (Days Played) + 400 = Too Many Dollars.
Sports: Football season isn't here for another three months.
Television: 40 dollars a month.
Women: @#%^&$ dollars.

So I can find a woman and try to kill myself again, or have hours of fun with a 2 liter soda bottle and an air compressor. Hmm...

 

If you have some old carpet you can just put it over the soda bottle while filling it with compressed air- if the bottle blows up the shrapnel is caught- try some bottles and take notes of the burst pressure- then reduce the pressure by 20% and you should be good to go. (I'd verify each bottle with 15% over "operating pressure" with the carpet on before using it for live launches)
Have you tried it with the bottle filled 3/4 with water before applying the air)
AlpineRAM

 

I didn't do the math...

Plus they come with soda in them

 

Exactly how are you constructing these anyway ??

 

Standard hose fittings are the same threads as standard soda bottles.
Air compressor fittings have the same threads as hose fittings.
And teflon tape.


At 120 PSI a 2 liter bottle will go around 25 feet in the air... I don't know what they'd do at 150 PSI. I also don't know what they'd do if you filled them up with water.

 

I'd be impressed if you could get a glass beer bottle 25 feet in the air

Another thought... any way to make an aluminum can work?

 

I think they are supposed to go farther if you fill them partially with water...just make sure you are at least 15 ft away from them before you try this...not that I would know or anything

 

A guy here at work bored out a six inch diameter reactor vessel stud years ago to beer can size. He would dump two baby food jars of black powder and then cram about four beer cans in it as hard as he could and set it off. It would rain aluminum twinklies for about ten minutes. How far did they go up?

 

They go a lot higher with water in there, I did it in grade school and it went like 50-60 feet high I think. What works even better, is you put jello in there and let it harden into gelatin, and then they go like 100 feet high.

 

How do you acquire this knowledge???

"Hey Bubba, this water sucks...lets put Jello in it and see what happens" "Hold my beer, and watch this. SHOOOOOOOSH!!!!!!

Chris

 

I used to use 120-130 psi in soda bottles for the retracts in my giant scale R/C warbirds. I saw them go up to 175 on a hot day in the sun so we went to aluminum tanks. There was a photo of one that went off inside the fuselage of a large AT-6 and it looked like it got shot down by a direct hit from AA fire

I tryed max pressure in the shop by leaving my 12 volt high pressure compressor on. It went off at 190 with the biggest bang ever heard. Knocked the dust off the ceiling. If that had happened in the plane it would have been all over. We wrapped them with filiment tape and got to 220 psi which created and insane bang. The aluminum can are much safer.

 

you guys need to find something better to do with your time.....but while your at it put mentos in the coke....shake it up....then bounce it off the ground.......you gotta see that

 

Hey Begle! Fill 'em up to the neck and Hydrotest each one to max avail pressure before flying them, especially with kids around.
Some of them have flaws or thin spots that will blow on filling with air .
I flew one down the street and it was so scratched & gouged up from the road-rash that it failed early while hydrotesting it.. Glad it split with water in it than water&air! It's those new clean ones that let loose early that can ruin your day .

Those sucker's will hold a BUNCH of pressure before letting loose!
Depends on the batch/brand/temperature etc.

K.