On Sun, 1 Jul 2018 13:05:42 -0400, "Mr. Luddite"
wrote:

On 7/1/2018 11:54 AM, wrote:
On Sun, 1 Jul 2018 06:47:08 -0000 (UTC), Bill
wrote:

wrote:
On Sun, 1 Jul 2018 02:15:43 -0000 (UTC), Bill
wrote:

Keyser Soze wrote:

Fretwell's point on industrial gases is...absurd.


What is absurd on the industrial gases? Columbine and at least one other
mass attack had rigged propane bombs, which luckily failed to explode.

Those were just kids who flunked chemistry or never watched Myth
busters. The gas inside the tank is not particularly dangerous.


They tried to use a small explosive to rupture the tank I think. Did not
rupture. And a fast leaking tank is a bomb. Couple years ago, in Dublin,
Ca near me, a minister was blown through the glass patio doors when the
tank developed a giant leak.

A slow leak is a much worse explosion. It is all about involving as
much volume of fuel air mix as possible. If you insert the gas into
the HVAC system it is a lot more effective than just breaching the
tank in one room. That is simple middle school science. Maybe I am
more aware of this because I heard a house go up when I was a kid and
there was nothing left but the 1st floor deck when we got there.
Pieces of the house were spread out over a whole block. Everyone in
the house died. The FD determined one stove burner was on simmer.



I live in a *very* rural area right now. Last year around July 4th
someone shot a 20 lb propane tank with a gun in a field about a half
mile or so from my house. The explosion was deafening and we and all
our neighbors felt our houses shake.


There was more going on than simply shooting the tank.
Where was the ignition source?
My bet, some distance away.
OTOH a friend of mine did 3 inner tubes full of Oxy/acetylene and
brought the cops from 3 miles away. He wanted to do it in front of my
house but I wouldn't let him. +