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Merged Freefall is not evidence for Controlled Demolition

Wow free fall. Is that a joke.


The idiocy is that there was so little resistance. Most of each tower was pristine and supposedly undamaged.

I discussed the resistance of WTC7 in the OP, and I point out that the interior collapse load overcomes it. Read the OP. Also, again I say this discussion is only about WTC7. No derails. If you wish to discuss WTC1 and 2 collapse progression, use the search function or index and find the appropriate thread: there are several.
 
So yes..the free fall = CD argument essentially fails. It is however pretty hard to not say that the collapses happened alot faster then one would expect from a resistant structure. This is what implies that there was some other forces involved..one of which could have been CD.

It doesn't imply. It demands.
 
lexicon008, it is a refreshing change to encounter a poster here who at least sympathizes with, or assigns a significant likelihood to, 9/11 "Truth" claims of CD and who is able to hold differentiated views on single topics, agreeing with counterclaims when those seem well supported.
Thanks for that.

You're welcome.



It's pretty sad when a group that pretends to be of technical professionals doesn't define its terms, wouldn't you say?

It happens on both sides sadly, but yes, they should be more clear.


Nope. Do you know that part of the north wall, which supposedly fell oh so neatly, actually fell across the street and on top (on the roof) of another highrise there, damaging that other building so severely it had to be demolished in turn? Debris from WTC7 also crossed the street to the west, slamming high into the Verizon building and contributing to the Verizon's >1 billion damage bill.
This is pretty damned different from "into the footprint" and a major deception (lie), in my opinion. You can't possibly say "into foot print" or even "pretty damn close to footprint", if you destroy and majorly damage buildings on the other side of at least two streets!

Ok i'll give you that but only because classical CDs have the opportunity wrap the structure and surrounding area to lessen damage and possibility of errant materials. And the fact that the structure was not predemolished so had far more mass and material to eject ;)




But back to the point I made:

You had previously agreed that the "freefall" argument isn't valid, and I had asked you what you make of the fact that Gage and, supposedly, his 1900+ A&E, push that argument anyway. You handwaved this question, saying it's just one argument, and perhaps not central.

Now you agree that several other of the arguments Gage and his supposed 1900+ make about WTC are also invalid, or at least weak or ill-defined.

Is it maybe time for you to step back and assume that Gage does not present good arguments for a CD of WTC7 - period? And if he doesn't - who else does? Do any good arguments exist - at all?

I think not.

And as i have said..while i find the idea of a CD possible..i find it improbable based on a number of reasons. I am not however, an engineer nor an architect. I also don't have access to all the materials they have.
You however must also realize that the AE group has not been given access to the remaining materials for testing purposes. Nor were they given the technical data used for the simulations. In an open discussion, those items need to be available to both sides. Perhaps if they were given the information they want many of them would change their minds and drop the issue?
 
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And as i have said..while i find the idea of a CD possible..i find it improbable based on a number of reasons. I am not however, an engineer nor an architect. I also don't have access to all the materials they have.
You however must also realize that the AE group has not been given access to the remaining materials for testing purposes. Nor were they given the technical data used for the simulations. In an open discussion, those items need to be available to both sides. Perhaps if they were given the information they want many of them would change their minds and drop the issue?
Although I find the CD theories to be baseless, I do think NIST should release it's data for their simulation of the collapse. It would be very useful to have it.
 
Except he doesn't. All four points are fully in agreement with observed reality:
- He compares models to the behaivious he describes, i.e. average acceleration over several seconds - both align sufficiently


wrong, when he speaks of freefall, he said it did not happen.
sunder - "the analysis shows a difference in time between a free fall time, a free fall time would be an object that has no...uh... structural components below it. And if you look at the analysis of the video it shows that the time it takes for the...17...uh...for the roof line of the video to collapse down the 17 floors that you can actually see in the video below which you can't see anything in the video is about...uh... 3.9 seconds............And you had...you had a sequence of structural failures that had to take place and everything was not instantaneous."



so structural failures had to take place and everything was not instantaneous implies there should have been structural resistance throughout the whole fall and no instantaneous/freefall/g moment.

-- The failure was indeed not instantaneous, as acceleration increased gradually from 0 to about g over a serious span of time.
true but what would the lead NIST investigator say about g.

sunder - "And you had...you had a sequence of structural failures that had to take place and everything was not instantaneous."

he equates freefall with instantaneous meaning there was NO structural resistance.

- Of course there was structural resistance - since acceleration was well under for most of the fall as well as on average
of course.

- Once this period of progressive failure of vertical supports lower in the north wall had practically finished, there was no, or negligible, net resistance from that sub-assembly
hum, it would be nice if they kept that steel so we could analyze that hypothesis.
so are you saying "about g" like you stated above or "g".
 
wrong, when he speaks of freefall, he said it did not happen.

This is the essence: "the analysis shows a difference in time between a free fall time" - meaning: The entire collapse took longer than complete free fall would have.
He then goes on to explain what "free fall time" is, and why they also expected the collapse to take longer than a complete free fall.

The original myth was that the entire building collapsed "at virtually free fall speed", which is what he seems to be addressing.
 
This is the essence: "the analysis shows a difference in time between a free fall time" - meaning: The entire collapse took longer than complete free fall would have.
He then goes on to explain what "free fall time" is, and why they also expected the collapse to take longer than a complete free fall.

The original myth was that the entire building collapsed "at virtually free fall speed", which is what he seems to be addressing.

he speaks of free fall in general and describes what it means when free fall occurs.
sunder - " a free fall time would be an object that has no...uh... structural components below it."
 
he speaks of free fall in general and describes what it means when free fall occurs.
sunder - " a free fall time would be an object that has no...uh... structural components below it."

No, like I said, he goes on to explain what he means by "free fall time", after stating that the collapse took longer than "free fall time":
 
No, like I said, he goes on to explain what he means by "free fall time", after stating that the collapse took longer than "free fall time":

but it hit "free fall" which means according to sunder that the building or a "object that has no...uh... structural components below it."

I get what you are saying but he was using averages. the orginal question dealt with the nist report claims 40% slower than freefall based on a single data point. after chandler brought up his math, nist had to break it up into 3 stages and low and behold.......free fall. and what did sunder say about free fall " a free fall time would be an object that has no...uh... structural components below it."

from nist webpage: 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.

sounds like sunder slipped there don't ya think!! columns buckling is providing resistance and the model does not show "free fall."


http://www.ae911truth.org/en/news-s...ve-that-the-skyscraper-came-down-by-fire.html
 
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but it hit "free fall" which means according to sunder that the building or a "object that has no...uh... structural components below it."
No, in the original context that is his definition of the time for a complete free fall.

the orginal question dealt with the nist report claims 40% slower than freefall based on a single data point. after chandler brought up his math, nist had to break it up into 3 stages and low and behold.......free fall.
NIST didn't "have to" break the collapse up in stages. They went beyond the scope of the report to add that section ("for discussion purposes"), but it didn't change any of their conclusions including the measured collapse time.

from nist webpage: 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.

sounds like sunder slipped there don't ya think!! columns buckling is providing resistance and the model does not show "free fall."
No, I don't. The acceleration gradually increased and fluctuated g for a duration (what NIST calls "stage 2"), which just shows that at that point in time, the structural support(of the perimeter wall) would have been neglible, which is consistent with most of the internal structure having already collapsed and likely serving as an extra down-pull.

If there was a slip on NIST's part, it would be that they went beyond the scope of the report in hope to clarify things about the collapse progression to people who do not understand the technicalities anyway.

Hasn't this been discussed at great length already?
 
but it hit "free fall" which means according to sunder that the building or a "object that has no...uh... structural components below it."

I get what you are saying but he was using averages. the orginal question dealt with the nist report claims 40% slower than freefall based on a single data point. after chandler brought up his math, nist had to break it up into 3 stages and low and behold.......free fall. and what did sunder say about free fall " a free fall time would be an object that has no...uh... structural components below it."

from nist webpage: 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.

sounds like sunder slipped there don't ya think!! columns buckling is providing resistance and the model does not show "free fall."


http://www.ae911truth.org/en/news-s...ve-that-the-skyscraper-came-down-by-fire.html

NIST, sunder, etc. are not germane to the OP, Senenmut. I show there that freefall is no more proof of a controlled demolition than not-freefall, therefore there was freefall or not is not proof of CD according to the OP.

If you disagree, please show your work. References to experts and other prior work will not make your case. Facts and reasoning will. If it helps any, I believe NIST was wrong to state there was any set period of freefall, because there is no proof that there was constant freefall. This is stated in the OP. Feel free to go to the femr2 thread linked to in the OP for plenty of research material on what the actual acceleration profile looked like, and none of the detailed profiles there (including the NIST profile) look like a step function: instant, constant free fall.
 
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No, in the original context that is his definition of the time for a complete free fall.

free fall is free fall. period. I don't think you understand the word. if there was resistance all the way down then what? if there was resistance all the way down then for x amount of feet NO RESISTANCE, then what. if there was resistance all the way down then for x amount of feet NO RESISTANCE then resistance again, then what?



NIST didn't "have to" break the collapse up in stages. They went beyond the scope of the report to add that section ("for discussion purposes"), but it didn't change any of their conclusions including the measured collapse time.
ok? they did break it up after chandler called them out though didn't they?



No, I don't. The acceleration gradually increased and fluctuated g for a duration (what NIST calls "stage 2"), which just shows that at that point in time, the structural support(of the perimeter wall) would have been neglible, which is consistent with most of the internal structure having already collapsed and likely serving as an extra down-pull.
does the computer sim show free fall? your just making stuff up and have no forensic evidence (steel beams from those locations that show bucking and such). we can watch the vid showing the collapse but can only speculate to what is going on in the inside. neglible is resistance therefor sunders remark about "a free fall time would be an object that has no...uh... structural components below it" would be incorrect. are you going against the lead investigator of wtc 7 from the NIST and say that resistance can = free fall along with physics in general?

If there was a slip on NIST's part, it would be that they went beyond the scope of the report in hope to clarify things about the collapse progression to people who do not understand the technicalities anyway.

Hasn't this been discussed at great length already?
sure...sounds like some good spin to me.
 
NIST, sunder, etc. are not germane to the OP, Senenmut. I show there that freefall is no more proof of a controlled demolition than not-freefall, therefore there was freefall or not is not proof of CD according to the OP.

If you disagree, please show your work. References to experts and other prior work will not make your case. Facts and reasoning will. If it helps any, I believe NIST was wrong to state there was any set period of freefall, because there is no proof that there was constant freefall. This is stated in the OP. Feel free to go to the femr2 thread linked to in the OP for plenty of research material on what the actual acceleration profile looked like, and none of the detailed profiles there (including the NIST profile) look like a step function: instant, constant free fall.
it is proof of what sunder said:
"a free fall time would be an object that has no...uh... structural components below it."

he is an "expert" considering he was the lead investigator for wtc 7. my reasoning in sound......free fall = no structural componets below it.

but yeah, I agree with you that a controlled demo can be non FF or part FF or just about any combination of non FF and FF that one would like if you so desired in your construction of your demo.
 
it is proof of what sunder said:
"a free fall time would be an object that has no...uh... structural components below it."
Great, take it up with Sunder.

he is an "expert" considering he was the lead investigator for wtc 7.
Great, take it up with Sunder.

my reasoning in sound......free fall = no structural componets below it.
This is incorrect. Freefall can also mean that forces resisting are equaled by forces pulling plus the affect of gravity. If you disagree, show your work.

but yeah, I agree with you that a controlled demo can be non FF or part FF or just about any combination of non FF and FF that one would like if you so desired in your construction of your demo.
That's nice, I don't care what CD can be, although I think you'd be hard pressed to find CD's that are above FF, since that means the interior is collapsing first, although there are examples. I think one was the Hudson building in Detroit. Have fun playing around, freefall CD won't disprove that non-CD can also be freefall.
 
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free fall is free fall. period. I don't think you understand the word. if there was resistance all the way down then what? if there was resistance all the way down then for x amount of feet NO RESISTANCE, then what. if there was resistance all the way down then for x amount of feet NO RESISTANCE then resistance again, then what?
The resistance is matched and overcome by the load applied by the interior collapsing first. Please reread the OP.
 
I notice you quote Sunder alot, Senemut. So do you agree with his overall assessment on the collapse of building 7?

You also seem to think that the 2,5 seconds of freefall NIST measured was constant and not fluctuating, this is why NIST introduced the word "average" into their assessment of stage 2 because it may have been possible for "faster than freefall" being measured. May the more educated correct me if I am wrong about these two points but this is what i gathered from reading their report.

Correct me if i am wrong Senemut but by your understanding of freefall; are we to take that 8 floors just disintegrated into dust and offered no resistance? How much explosives would be required for that? If so what material would have been powerful enough for that? Remember that this material must not cause any loud sounds and completely destroy 47 columns in a matter of a millisecond(well at least according to your understanding).
 
I notice you quote Sunder alot, Senemut. So do you agree with his overall assessment on the collapse of building 7?

You also seem to think that the 2,5 seconds of freefall NIST measured was constant and not fluctuating, this is why NIST introduced the word "average" into their assessment of stage 2 because it may have been possible for "faster than freefall" being measured. May the more educated correct me if I am wrong about these two points but this is what i gathered from reading their report.

Correct me if i am wrong Senemut but by your understanding of freefall; are we to take that 8 floors just disintegrated into dust and offered no resistance? How much explosives would be required for that? If so what material would have been powerful enough for that? Remember that this material must not cause any loud sounds and completely destroy 47 columns in a matter of a millisecond(well at least according to your understanding).
Thanks for your second paragraph. I'd like Senunmut to focus. On that, that is the gist of OP point nr. 1: free fall is not demonstrably constantly achieved.
 

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