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PARIS — A mix of sprinkling system water and melted aluminum from aircraft hulls likely triggered the explosions that felled New York's Twin Towers on Sept. 11, 2001, a materials expert told a technology conference Wednesday.
Originally posted by Freedom_is_Slavery
In a controlled experiment carried out by Alcoa Aluminum , 20 kilos of molten aluminum was allowed to react with 20 litres of water, along with a small quantity of rust.
"The explosion destroyed the entire laboratory and left a crater 30 metres in diameter," Simensen said.
Originally posted by Freedom_is_Slavery
likely triggered the explosions that felled New York's Twin Towers on Sept. 11, 2001
Uploader Comments (JimLanphear) I have seen this reaction in person. Video doesn't do it justice. dmobbs01 3 months ago 4 @dmobbs01 -- You're right, it really doesn't. JimLanphear 1 week ago
Originally posted by Freedom_is_Slavery
In a controlled experiment carried out by Alcoa Aluminum , 20 kilos of molten aluminum was allowed to react with 20 litres of water, along with a small quantity of rust.
"The explosion destroyed the entire laboratory and left a crater 30 metres in diameter," Simensen said.
30 tonnes of aluminium
The official report on the causes of the collapse of the three buildings was drawn up by a commission appointed by the federal government and has since been supported by other publications.
The report came to the conclusion that the collapse was caused by heating and failure of structural steel beams in the centre of the buildings. "I believe that it is overwhelmingly probable that the theories regarding the cause of the collapse of WTC1 and WTC2 are wrong,
but that the report very likely came to the correct conclusion as regards WTC7," says Simensen.
"Why should we believe your alternative theory rather than the official explanation?"
"To put it as succinctly as possible: because the federal government commission did not take sufficiently into account the fact that the aircraft brought 30 tonnes of aluminium into each of the two towers."
The collision
"What sort of evidence do you have for the theory that you are putting forward?"
"I base my theory on comparisons I have made with parallel observable phenomena in the world of physics. Let us start with what I think must have happened when the planes struck the two towers.
They came in at high speed and at a low angle.
The only similar phenomenon that we have any knowledge of is meteors that hit the Earth.
What we know is that these drag material with them on their way through the soil layer.
The whole surface, including all its pores, is covered by the material that they carry along.
The innermost layer melts and turns into a glass coating on the surface of the meteor."
"I believe that similarly, the aircraft must have been covered by fragments of internal walls, ceilings and floors that collapsed around them and that the planes carried along with them as they penetrated the buildings.
Much of this material was plaster, a material with extremely poor heat conduction capacity.
All this debris probably formed a shield that kept the heat close to the aircraft and protected the rest of the building."
The fire
"So you believe that it was the aircraft themselves that became superheated, rather than the buildings?
"Yes I do. The disintegrated aircraft probably came to a stop near the centre of the buildings.
The materials along the track of the collision must also have burned.
But the really hot zone was where the aircraft came to a stop.
I believe that some of the aircraft's fuel tanks must have suffered major damage, but that most of them would have been cut in two when they met the steel beams in the buildings, and that the development of the fire was therefore fairly constant."
"I believe that the planes must have been lying in a sort of basin of material debris, with the floor of the basin two or three storeys below the one that they ploughed into.
The entire internal basin must have been heated by the burning fuel. Outside of the basin, the temperature would have been much lower."
"The aluminium alloy of the aircraft hulls, which also contains magnesium, melts at a temperature of 660o C. Experience gained from the aluminium industry suggests that it may have taken between half and three-quarters of an hour to reach such a temperature.
If molten aluminium is heated further to a temperature of 750o C, it becomes just as liquid as water.
I presume that this is what happened within the Twin Towers, and that the molten aluminium then began to run down into the floors below."
The explosions
"What happened then?"
"All the floors in the Twin Towers were equipped with sprinkler systems. All the water above the hot aircraft bodies must have turned to steam.
If my theory is correct, tonnes of aluminium ran down through the towers, where the smelt came into contact with a few hundred litres of water.
From other disasters and experiments carried out by the aluminium industry, we know that reactions of this sort lead to violent explosions."
"The aluminium would immediately react with the water, with the result of a local rise on temperature of several hundred degrees, in addition to the explosions that were due to the fact that these reactions release hydrogen.
Such reactions are particularly powerful when rust or other catalysts are present, which can raise the temperature to more than 1500o C."
"The aluminium industry has reported more than 250 aluminium-water explosions since 1980. [ex/]
www.sciencedaily.com...
www.physorg.com...edit on 22/9/11 by Freedom_is_Slavery because: LINKS
The collapse
"How could explosions in the centre of a building cause a whole tower to collapse?"
"Aluminium-water explosions are like dynamite explosions.
They were probably powerful enough to blow out an entire section of each building.
The top section would than fall down on top of the sections that remained below, and the sheer weight of the top floors would be enough to crush the lower part of the building."
The neighbouring building
"What happened in the case of the neighbouring WTC7 building?"
"WTC1 and WTC2 took huge amounts of aviation fuel, fragments of steel and, if my theory is correct, large quantities of molten aluminium when they collapsed.
When these materials and everything else fell some three or four hundred metres to the ground, they were squeezed between the upper and lower sections of the towers.
This led to the neighbouring buildings being bombarded by hot particles, fuel and probably also aluminium droplets.
Both large and small clumps of particles have since been found embedded in the walls of these buildings."
"WTC7 may have taken more of these impacts than the other buildings. At any rate, the building caught fire, which got out of control. In this case, the structural steel may have reached a temperature of more than 1000o C, over seven hours, and the 13th floor collapsed in the course of a minute.
In this case I do agree with the findings of the federal commission. Overheating of steel beams was probably the cause of the collapse."