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originally posted by: Salander
a reply to: samkent
Oh Sam! The comments of Rather and Jennings are not all we truthers have. Those comments and observations are but 2 tiny pieces of straw on a very large pile of straw that is the metaphorical haystack that is the case against the official story.
Lordy, Sam. There are missing airplanes, wrong airplanes. There are impossible cell phone calls. There is near free-fall rates of collapse. There is magnificent cover-up. There is Vigilant Guardian, Project Hammer, heads of the commission stating in public they were set up to fail, and so much more. The haystack of facts that contradict the official story is huge.
originally posted by: Salander
a reply to: firerescue
One does not need to be an expert to watch CD or porno. It's just watching pictures, and most people are capable of recognizing the pattern of CD once you've seen it. I know I am. That free-fall characteristic is a big clue.
In a video, it appears that WTC 7 is descending in free fall, something that would not occur in the structural collapse that you describe. How can you ignore basic laws of physics?
In the draft WTC 7 report (released Aug. 21, 2008; available at wtc.nist.gov...), NIST stated that the north face of the building descended 18 stories (the portion of the collapse visible in the video) in 5.4 seconds, based on video analysis of the building collapse. This time period is 40 percent longer than the 3.9 seconds this process would have taken if the north face of the building had descended solely under free fall conditions. During the public comment period on the draft report, NIST was asked to confirm this time difference and define the reasons for it in greater detail.
To further clarify the descent of the north face, NIST recorded the downward displacement of a point near the center of the roofline from first movement until the north face was no longer visible in the video. Numerical analyses were conducted to calculate the velocity and acceleration of the roofline point from the time-dependent displacement data. The instant at which vertical motion of the roofline first occurred was determined by tracking the numerical value of the brightness of a pixel (a single element in the video image) at the roofline. This pixel became brighter as the roofline began to descend because the color of the pixel started to change from that of the building façade to the lighter color of the sky.
The approach taken by NIST is summarized in Section 3.6 of the final summary report, NCSTAR 1A (released Nov. 20, 2008; available at wtc.nist.gov...) and detailed in Section 12.5.3 of NIST NCSTAR 1-9 (available at wtc.nist.gov...).
The analyses of the video (both the estimation of the instant the roofline began to descend and the calculated velocity and acceleration of a point on the roofline) revealed three distinct stages characterizing the 5.4 seconds of collapse:
Stage 1 (0 to 1.75 seconds): acceleration less than that of gravity (i.e., slower than free fall).
Stage 2 (1.75 to 4.0 seconds): gravitational acceleration (free fall)
Stage 3 (4.0 to 5.4 seconds): decreased acceleration, again less than that of gravity
This analysis showed that the 40 percent longer descent time—compared to the 3.9 second free fall time—was due primarily to Stage 1, which corresponded to the buckling of the exterior columns in the lower stories of the north face. During Stage 2, the north face descended essentially in free fall, indicating negligible support from the structure below. This is consistent with the structural analysis model which showed the exterior columns buckling and losing their capacity to support the loads from the structure above. In Stage 3, the acceleration decreased as the upper portion of the north face encountered increased resistance from the collapsed structure and the debris pile below.
The items on the roof did not come down at the same time.
Like how you have to push the false narrative “evidenced by the levelness of the roofline as it came down,“ which is not supported by the video evidence in anyway.
Again, WTC 7 collapse was nothing like a CD.
originally posted by: drommelsboef
The hollow shell theory is an oldie. And the most ridiculous one ever. To simplify things if the facade falls with f(t) and i(t) is the interior collapse then the difference d(t)= | i(t)-f(t)| is a measure of the connection. If this is small then heavily connected etc.
If the facade is heavily connected then d(t) is small which means i(t) is what we see from the outside, i.e the video evidence. If this is the case d(t) is in fact a small wave added to the internal collapse. This can increase the collapse a bit but still means i(t) is near g.
If the facade is not heavily connected then f(t) can be anything. The extreme opposite is indeed thd hollow facade theory. How would that behave ? Just drop an empty shell and it will fall over, twist and rotate.
But since f(t) is measured as near g, symmetrical and horizon level there can only be a heavy connection between facade and the internal building.
In other words the near g fall is for the whole building.
So they see here buckling for floors 7 to 14, that is 8 floors, which is consistent with the free-fall time observed; NCSTAR1-9, Ch.12.5.3 p. 602 (668 pdf)
What, you don’t like there is no proof of CD? You don’t like the questions your false narrative cannot answer.
You don’t like the list of questions you cannot answer with any credibility.
How would a floor to floor CD system you claim must have existed survive WTC 7’s building damage and wide spread fires?
I have cited NIST’s answer how the facade reached the rate of free fall. You have not provided a rebuttal.
If the facade did not collapse at slightly different rates of over its length and width, why is it a big deal the north face was used as the reference to measure the rate of collapse.
Can you cite any physical evidence or effects of CD?
WTC 7 does not ever look like a CD.
After 60 percent of the interior of WTC 7 collapsed before the witnessed movement of the north face of the facade, the facade could not fall at the rate free fall in the middle of the facade’s collapse? Is that a false statement?
Most of the floor system was gone when the facade began to collapse!