On Tue, 13 Apr 2010 08:40:09 -0400, wrote:

On Tue, 13 Apr 2010 08:37:16 -0400, dgk wrote:

On Mon, 12 Apr 2010 10:27:26 -0400, wrote:

On Mon, 12 Apr 2010 09:17:36 -0400, dgk wrote:

On Fri, 09 Apr 2010 08:58:02 -0400, wrote:

On Fri, 09 Apr 2010 08:45:32 -0400, dgk wrote:

On Tue, 6 Apr 2010 20:34:49 +0000 (UTC), Elmo
wrote:

Anyone know at what PSI a typical plastic soda bottle explodes?

I've built a home carbonation system. The gauges say I've put in 150PSI of
C02 into the Trader Joe's (admittedly thick) carbonated water bottles.

Nothing happened (with respect to explosions).

Yet, as I dig on the web, I find that plastic soda bottles are supposed to
explode at 120 to 150psi.
http://community.nbtsc.org/wiki/HomeMadeSoda

Obviously I need more data.

Do you have data points showing when soda bottles explode?

PS: If there's a soda or carbon dioxide related newsgroup for home
carbonation, please let me know.


Particularly on topic for me because I have an Air Horn on my bicycle:

http://www.amazon.com/Delta-Airzound.../dp/B000ACAMJC

It uses what appears to be a slightly thicker version of a soda
bottle. It is a very effective horn, in fact, a bit too loud.

RTFM - it has a volume control.

That's no volume control - it's an on/off switch. They can say
whatever they want but I own one. Any touch strong enough to release
the air causes enough noise to make someone jump.

I own 2 on bicycles and one hand held I use as a backup on my boat.
There is a VOLUME CONTROL on the side. It is a little knob connected
to a cam that squeezes the air tube to reduce volume.

Once again...

RTFM

I'll take a look - that would be a good thing. I don't recall that I
ever saw a manual.

It's one of the bright red or orange bits on the side. Just a little
lever attached to a cam that constricts the hose as you rotate it.



You are correct and you have made my life a little bit better. That
horn was really too loud and now I can attenuate it so the target
doesn't die of a heart attack. It gets so messy when that happens.

I have to attach it to my new bike. I don't bother using it during the
winter because there aren't that many joggers clogging the bike lanes.
Now they're out in full force.