Continuing:
Quote from BYU physics teacher.
Just above that:
First, Thermite is not a high-explosive and burns quite slowly. Why would RDX or HMX would be used in leu of Composition 4?
If there were "cutter-charges" and the observed puffs would be the entire charge going off, not a squib. A squib is nothing more than an initator. The high-explosive would go off instantly so the puff would have to be due to a secondary-explosive (the cutter-charge) and not just a squib.
On the other hand, if he is trying to indicate the squibs ignite thermite: thermite is ignited by magnesium that deflagrates (burns with extremely high-temperature) and does not detonate. A squib would do nothing but scatter the thermite.
So, either way he has some errors that would certainly indicate a major error in his report which is unlikely to occur coming from an explosives expert.
It is highly doubtful that a simple fire would cause a building collapse. Like most accidents two or more factors usually combine (often found in aircraft accidents).
In this case we have the unique structure of very heavy concrete floors literally hung on brackets from the external shell of the building which acted as a pipe.
Do you have any idea of the energy the building absorbed due to the inertia of the aircraft? Don't you think that would cause major damage to the building causing a weak link?
Then we have a major load of fuel. A hugh flying incendiary missile carrying a close equivalent to napalm.
Then we have the ducting of the heat directly to the damaged "weak-link" area as the fuel ran down to lower floors. Puff came when the floor collapsed and the pancaking began. (Much powder powderized.)
Molten Iron? You have a blast furnace being oxidized by air pulled upwards. With the heat confined in the pipe and bleeding out the damaged section which creates a low pressure zone causing more air to rush in from below increasing the oxidation. Just like a blast furnace used to melt iron.
Quote from BYU physics teacher.
"I maintain that these observations are consistent with the use of high-temperature cutter-charges such as thermite, HMX or RDX or some combination thereof, routinely used to melt/cut/demolish steel.?"
Just above that:
Smoke/debris-jets: Did you observe puffs of smoke/debris coming out of the building? Please note for yourself the sequence and fast timing of observed puffs or “squibs.”
First, Thermite is not a high-explosive and burns quite slowly. Why would RDX or HMX would be used in leu of Composition 4?
If there were "cutter-charges" and the observed puffs would be the entire charge going off, not a squib. A squib is nothing more than an initator. The high-explosive would go off instantly so the puff would have to be due to a secondary-explosive (the cutter-charge) and not just a squib.
On the other hand, if he is trying to indicate the squibs ignite thermite: thermite is ignited by magnesium that deflagrates (burns with extremely high-temperature) and does not detonate. A squib would do nothing but scatter the thermite.
So, either way he has some errors that would certainly indicate a major error in his report which is unlikely to occur coming from an explosives expert.
No building before has had a jet-airliner full of kerosene crash into it that was built the way the WTC were.– no steel-beam high-rise had ever before (or since) completely collapsed due to fires! However, such complete and nearly symmetrical collapses in tall steel-frame buildings have occurred many times before -- all of them due to pre-positioned explosives in a procedure called “implosion” or controlled demolition. What a surprise, then, for such an occurrence in downtown Manhattan— three skyscrapers completely collapsed on the same day, September 11, 2001, presumably without the use of explosives.
It is highly doubtful that a simple fire would cause a building collapse. Like most accidents two or more factors usually combine (often found in aircraft accidents).
In this case we have the unique structure of very heavy concrete floors literally hung on brackets from the external shell of the building which acted as a pipe.
Do you have any idea of the energy the building absorbed due to the inertia of the aircraft? Don't you think that would cause major damage to the building causing a weak link?
Then we have a major load of fuel. A hugh flying incendiary missile carrying a close equivalent to napalm.
Then we have the ducting of the heat directly to the damaged "weak-link" area as the fuel ran down to lower floors. Puff came when the floor collapsed and the pancaking began. (Much powder powderized.)
Molten Iron? You have a blast furnace being oxidized by air pulled upwards. With the heat confined in the pipe and bleeding out the damaged section which creates a low pressure zone causing more air to rush in from below increasing the oxidation. Just like a blast furnace used to melt iron.