Results 14 to 19 of 19
12-22-2012, 10:02 PM #14Professional Member
- Join Date
- Feb 2004
- Pacific NW
approx 4 million btu per ton of tnt
approx 1000 btu per cu ft, so 4000 cu ft of NG per ton tnt
about 9-1/2 cu ft of air per cu ft NG, right?
so, 42,000 cu ft of house for a ton of TNT for NG blast (aka air-fuel bomb)
Say big house, 8 ft ceiling, 4000 sq ft house including basement, etc = 32/42 approx 3/4 Ton of TNT equivalent.
at 50 ft away, about 8 psi overpressure or wind speed like a Fujita F4 tornado ripping thru the neighborhood which is what the damage indicated.
To actually plan for the level of damage seen and to acheive the stochiometric mix at ignition would imply an intelligence way above what the perps obviously are lacking .. stupidity is no defense for murder, esp when evil intended.... concur with charging sentiments of previous posters
12-23-2012, 08:40 AM #15Professional Member
- Join Date
- Jan 2007
- Mn the state where absolutey nothing is allowed
great post, i too was tring to do the math. i cant speak for tnt equivelent but having a background as a "gas guy" i seen many vidios and the results of houses purposfully blown up and the data these tests reveil.
its harder than youd think to reach a level between LEL and UEL in a house esp one that large.
the creeps that did this were either very smart or very lucky.....
from the reports it sounds like the 2lb regulator was removed and bypassed and a valve in the gas fireplace missing. so gas at 2 psi through probably 1/2 or 5/8" copper for 7-8 hours to bring a 3 story 4000 sq ft house with minimal air changes to between 5-15% gas.
before thr microwave was set to start the ignition source.
someone did a lot of research.....
i hope they fry.my boss thinks its possible to repeal the laws of physics
12-23-2012, 09:42 AM #16
Hang um high."Better tell the sandman to stay away, because we're gonna be workin on this one all night."
"Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."
"Just get it done son."
01-01-2013, 11:46 PM #17
01-02-2013, 12:25 AM #18
The idiots changed the digital tstat to a mechanical tstat that can generate a spark.
Stupid. Why not just program the stat to call for heat at a certain time. The ignition of the furnace would ignite the gas filled house.
01-04-2013, 09:58 AM #19