MikeC
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All concrete is waterproof, actually. No need for sealant. Q> what is the Hoover Dam made from?
seepage shafts
All concrete is waterproof, actually. No need for sealant. Q> what is the Hoover Dam made from?
Not an engineer, but I have two considerations. (1) The Gambino family had a lot of control in the construction industry, especially cement, when the Twin Towers were put up. So we cannot assume that everything was built according to specifications. Just because we don't know about Mafia involvement in the steel, does not mean it didn't exist; (2) Possibly any heat from burning material would be funneled into the narrow space of elevators, and when a gas is funneled into a narrow space, it is hotter. That's all.
I have nothing except a few books, an empty computer, and maybe there's an English library fifty miles away. And forty years previous engineering experience.not because I particularly like it, but because it's part of my job.
I have nothing except a few books, an empty computer, and maybe there's an English library fifty miles away. And forty years previous engineering experience.
I suggest you don't like it.
Where did the potential energy go, if not into the basement hotspots?
I should have said some of the energy. It's true that I disregarded the absorption of energy that way.Where does the energy of an earthquake go? Consider that the WTC collapses registered as small earthquakes, doesn't that suggest quite a bit of the energy ended up in the ground for quite some distance around the site. Partly as heat, but partly as kinetic energy - the falling debris theoretically pushes the planet very very slightly, and practically pushes whatever it lands upon. It did not fall upon an infinitely large infinitely rigid flat surfaced body.
I should have said some of the energy. It's true that I disregarded the absorption of energy that way.
But my point with demonstrating the bound of the energy as 1200 tons of steel at melt temperature was merely to make the point that that was the available energy, and a proportion of that amount would have to be found in the basement as heat around the foundation slab.
Summary: The flow is not steel because the structural steel would fail well below the melting temperature. The flow is likely to be a mixture of aluminum, aluminum oxides, molten glass and coals of whatever trash the aluminum flowed over as it reached the open window. Such a flow would appear orange and cool to a dark color.
Stephen D. Chastain
but this is very misleading, if not flat out incorrect. 1000 F (or 537 centigrate) is just shy of the -annealing point- of soda-lime glass (actually 546 C, or 1015 F), well prior to softening. Softening, which doesn't even equate to melting, takes place at 726 C (or 1340 F), which is the point at which the glass will sag and deform, not 'flow' like a liquid. The heat required to get plate-glass in a state in which it would homogeneously flow with molten aluminum would likely be in the 1000 C + range at least. As for the 'coals of trash' theory, that's a very interesting, if not rather basic supposition, but also rather easily tested. Show me an aluminum/carbon-residue mixture at temperatures below 1000 C that glows red-hot even when poured from a considerable height, and I'll be convinced the pouring flow of molten orange out of the tower just prior to its collapse isn't suspect.The emissivity of plate glass is .937 It begins to soften at 1000 F and flows around 1350 F. Silica has an emissivity of .8
Show me an aluminum/carbon-residue mixture at temperatures below 1000 C that glows red-hot even when poured from a considerable height, and I'll be convinced the pouring flow of molten orange out of the tower just prior to its collapse isn't suspect
yar, but in order to account for the massive flow (I don't think Lee was wrong in speculating it at several tons, given the scale) of pure-orange substance, the silver-hot aluminum would of had to have homogenized, at least to some extent, with these ambiguous materials. In the case of plastics and ash-residues such a homogenization is vaguely plausible, though I don't know enough about the capacities of plastics and molten metals to 'mix'. Still, for the entirety of the massive flow to be just the right mixture of homogenized aluminum and debris to achieve the same glowing-orange hue throughout its pour is unlikely on the border of impossible, which would suggest 'just the right mixture' isn't at all required, and about any mixture of molten aluminum and plastics/carbon residues can achieve this effect. That's why I suggested such a premise should be exceedingly easy to test, and either prove or disprove promptly.
I agree testing is in order for several issues regarding what was observed on 911 . . . including the ability of minimally trained pilots to hit the towers, the necessary parameters to produce and sustain hotspots, the ability to progressively collapse steel reenforced buildings, etc . . .yar, but in order to account for the massive flow (I don't think Lee was wrong in speculating it at several tons, given the scale) of pure-orange substance, the silver-hot aluminum would of had to have homogenized, at least to some extent, with these ambiguous materials. In the case of plastics and ash-residues such a homogenization is vaguely plausible, though I don't know enough about the capacities of plastics and molten metals to 'mix'. Still, for the entirety of the massive flow to be just the right mixture of homogenized aluminum and debris to achieve the same glowing-orange hue throughout its pour is unlikely on the border of impossible, which would suggest 'just the right mixture' isn't at all required, and about any mixture of molten aluminum and plastics/carbon residues can achieve this effect. That's why I suggested such a premise should be exceedingly easy to test, and either prove or disprove promptly.
could be, but most all plastics that can melt do so at less than 300 degrees centigrade, most infact at much, much lower temperatures, and all reach combustion at temperatures less than 600 degrees centigrade (Polycarbonate, though having a very low melting point, doesn't burn until it reaches temps of 580 degrees +, but the average seems to be around 350-450 C), and all these combustion points are lower than the melting point of aluminum and the estimated temperatures of the fires. Considering the fires had burned for roughly an hour when the flow began, its highly improbable that the flow was a large quantity of molten plastic, as any plastic in such close proximity to the fires would combust rather than remain liquified. If you've ever tossed plastic wrap onto a fire (which you really shouldn't do) you know that it appears to start melting for a moment, before rapidly blackening/crumbling.
But that "pour" was immediately below roughly seventy tons of aircraft fragments heated red hot. Only five neurones need to be put to use.
It has to be molten aluminum because of its low melting point and proximity to a source of both heat and aluminum. This liquid could certainly drag glass fragments, which have the same density, with it.
I agree.
Please explain to me how these scattered fragments of aluminum managed to melt, coalesce, and pool in such a quantity against an exit point that tons upon tons of it would go pouring out of the building more or less all at once.
A post back you insisted it could have been just about anything, now you agree that it has to be molten aluminum? That was a quick turn.
I don't think you need to get down to "carbon-residue" - simply stuff that is burning. If there's a small stream of aluminum, then it can carry along burning debris, and indeed spark new fires as it goes along and collects debris, then the whole lot finds its way out of the building.
I mentioned this earlier as "embers", which I think lee misinterpreted as "sparks", suggesting they would go up, not down. But I was thinking more along the line of chunks of burning debris.
External Quote:ember - definition of ember by the Free Online Dictionary, Thesaurus ...
www.thefreedictionary.com/ember
A small, glowing piece of coal or wood, as in a dying fire. 2. embers The smoldering coal or ash of a dying fire. [Middle English embre, from Old English merge.] ...
Consider the scale of the event, SR. You've got a relatively continuous flow lasting a couple of minutes which makes it all the way from the impacted floor to the ground largely 'unbroken'. Its not a continuous stream of course, but the volume of materials required to go from the 80th' or so floor to the ground and -still- be pouring would have to be quite large. Keep in mind that the video Mick posted is by no means the only one, and only features brief, slow-mo glimpses of particular events he was emphasizing. In other, fuller videos of the event, you can see the stream lasts quite a while.
And certainly you're not wrong, aluminum is a prominent metal. I wager the only aluminum in my own office is in the laptop/chair, but there is a lot of it kicking around most buildings. I'm not saying there wasn't lots of aluminum in the towers, or that the planes weren't made of aluminum, or that molten aluminum wasn't present in the towers. I'm saying that I fail to see why a bright-orange flow gushing profusely out of the impact-site mere moments prior to the building's collapse and long after the impact is 'obvious', not suspect, and doesn't warrant a little more investigation than an untested supposition of aluminum.
Mick has shown us plenty of 'verniage' videos of towers being collapsed by taking out a single floor at a mid-to-high point in an effort to point out how the Tower collapses more resemble verniage demolition than an explosive demolition. He's not wrong in that, the tower collapses (obviously excluding building 7) do seem to better resemble a verniage demolition. So if the collapse resembles a verniage demolition, and there's video evidence of a large amount of molten orange substance pouring out of the impacted floors in the moments leading up to this verniage style collapse, isn't it worth considering/investigating what that substance really was, and running tests to prove it was just aluminum and crud? The whole 9/11 investigation has been full of bold suppositions around extremely important issues with no actual experiments/demonstrations/disclosure of data. When people ask 'What the hell..? Why all this secrecy/inadequacy/general dicking around by the authorities...?' the general reaction is to label them as mentally ill or supremely stupid as quickly and as loudly as possible.
Discussing, exploring, testing and investigating every possible aspect of that horrible event should be in the very ethos of North America. That it's not, and that in the United States, and even here in Canada, it was being treated like old news and taboo to mention as early as 2002, is and has been highly disturbing to me. I wasn't a 'conspiracy theorist' when it happened, or in the months afterward. George Bush was just a source of comedy and then grave dismay, Dick Cheney just another brutal old white guy. I just watched horrified like everyone else, first the tower-collapses, and then later in the day building 7, which inspired in my family an almost immediate chorus of 'Oh my God, they blew it up.'. It was the way the American media/authorities handled the situation that left me with little to no doubt something highly suspect was going on, and it wasn't until we were a few years into rampaging wars that I started to actually research the subject.
There's several tons of it pouring off the side of a huge skyscraper...
Stop you there. The plane impacted the building first. Around each impact point the structure of the plane would shear and the sheared-off pieces would continue straight on, spinning from coupled rotational accelerations. The parts not in direct collision with floors and columns and beams would continue straight on to the far end of the building on each floor. The denser parts exited the far side. Typical photos of that corner show that behind the window spaces is a huge jumble of material - office and aircraft fragments. That's visual evidence.the airplane impacted the building in a powerful, massive explosion
An object glowing orange is hotter than 1000C full stop. It's a law of physics. But the burning office was also hotter than 1000C. It is also orange.Can you demonstrate molten aluminum glowing orange at temps below 1000C simply by mixing in carbon-residues/plastics?
An object glowing orange is hotter than 1000C full stop. It's a law of physics. But the burning office was also hotter than 1000C. It is also orange.
That group of burning floors was fed by air from a gash to the outside, and then helped by a central chimney that also helped to induce a fast through flow of air. A muffle furnace with seventy tons of aluminum fragments, and an hour to burn, will definitely get you a few tons of melt. By the time the melt began (it wouldn't be immediate!) I reckon the floor had already begun to sag.
Pulling shit out of my arse? That's polite. It's a visual estimate, based on the visual evidence. No claims to any figure or great accuracy - how much do you estimate?Where do you guys get that there are tons of it? Comments like this show that you have know idea what you're talking about and are just pulling shit out of you ass.
Stop you there. The plane impacted the building first. Around each impact point the structure of the plane would shear and the sheared-off pieces would continue straight on, spinning from coupled rotational accelerations. The parts not in direct collision with floors and columns and beams would continue straight on to the far end of the building on each floor. The denser parts exited the far side. Typical photos of that corner show that behind the window spaces is a huge jumble of material - office and aircraft fragments. That's visual evidence. The first response of the floors was to bow in the increased temperatures of the fire. This bowing allowed a lake of the material to collect. It was probably the concentration of mass in that area which caused the bowed floor to detach and destroy the stability of the column line to which it was attached and then initiate collapse. The explosion of the fuel didn't occur immediately upon impact. Time was required for fuel to disperse, ignition to occur, and then internal pressure to build up to thermobaric propensities. Then shazam.
An object glowing orange is hotter than 1000C full stop. It's a law of physics. But the burning office was also hotter than 1000C. It is also orange.
That group of burning floors was fed by air from a gash to the outside, and then helped by a central chimney that also helped to induce a fast through flow of air. A muffle furnace with seventy tons of aluminum fragments, and an hour to burn, will definitely get you a few tons of melt. By the time the melt began (it wouldn't be immediate!) I reckon the floor had already begun to sag.
the burning office was also hotter than 1000C
An object glowing orange is hotter than 1000C full stop. It's a law of physics. But the burning office was also hotter than 1000C. It is also orange.
Note these are ideal/theoretical values, that means that in 'real life' they are lower - because heat always equalizes with what's around it, doesn't it? It flows from hot to cold, doesn't it? Thermodynamics, isn't it? Cigarettes, matches, oven elements and a lot more things have lower than 1000c temperature, yet all are orange glowing. I'd like to see someone lead solder a copper pipe joint using a cigarette end - and lead solder liquifies at about 330c. Jazzy should fit that one into his video of him and 16lb hammer and concrete pulverizing.External Quote:For more theoretical/ideal values, consider this table (which also includes a few temperatures other than for gas/oxidixer mixtures):
[TABLE="align: center"]
[TR]
[TH]Fuel and Oxidizer type[/TH]
[TH]Temperature (Celsius)[/TH]
[/TR]
[TR]
[TD]Fluorescent light[/TD]
[TD]60-80[/TD]
[/TR]
[TR]
[TD]Incandescent light[/TD]
[TD]100-300[/TD]
[/TR]
[TR]
[TD]Cigarettes - unventilated conditions[/TD]
[TD]288[/TD]
[/TR]
[TR]
[TD]Cigarettes - ventilated[/TD]
[TD]400-780[/TD]
[/TR]
[TR]
[TD]Cigarettes - insulated and smoldering [/TD]
[TD]510-621[/TD]
[/TR]
[TR]
[TD]Stove element[/TD]
[TD]>550[/TD]
[/TR]
[TR]
[TD]Match[/TD]
[TD]600-800[/TD]
[/TR]
[TR]
[TD]Tungsten halogen light[/TD]
[TD]600-900[/TD]
[/TR]
[TR]
[TD]Candle flame[/TD]
[TD]600-1,400[/TD]
[/TR]
[/TABLE]