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questions.

Other 9/11 topics of a technical nature.

Re: questions.

Postby femr2 » Sun Aug 02, 2009 10:01 pm

iconoclast wrote:...but density of each object seems important, ie.. a piece of paper shouldn't be able to go through a piece of steel no matter how fast it's going...

Always useful to understand that you can cut through steel with "air". It just has to be going fast enough.

i have another question... if it's so easy to bring down buildings like the ones on 911 with fire, why don't demolition companies set up controlled burns instead of using explosives?
it only took like an hour for wtc1 and 2 to come down, it would save demolition companies a lot of time and money to just set some fires in the right areas...
other buildings have burned much longer and didn't collapse, i realize all buildings are not equal, so what were the wtc buildings so deficient in that say for example the Beijing Hotel fire was not?(among numerous other examples)

I try not to mention the "D" word here :)
I'm gathering a few video's to highlight failed demolitions, but here's a hilarious one:
http://www.youtube.com/watch?v=-duOjP-cevk
(Reminds me of NIST stating...following initiation, total global collapse was inevitable)
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Re: questions.

Postby iconoclast » Mon Aug 03, 2009 1:05 am

Always useful to understand that you can cut through steel with "air". It just has to be going fast enough.


i did a google and youtube search on this and came up with nothing, can you find a link for me?

I try not to mention the "D" word here
I'm gathering a few video's to highlight failed demolitions, but here's a hilarious one:
http://www.youtube.com/watch?v=-duOjP-cevk
(Reminds me of NIST stating...following initiation, total global collapse was inevitable)


i saw this in the other thread, it's pretty funny, and doesn't make sense compared to the 911 collapses. could it be structural differences or faulty construction that made the wtc buildings crumble like they did?
... or maybe size?
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Re: questions.

Postby femr2 » Mon Aug 03, 2009 2:22 am

iconoclast wrote:i did a google and youtube search on this and came up with nothing, can you find a link for me?

Sure, but consider the effect of an 'explosion'. To 'slice' it'll have to be some pretty fast moving air, and very focussed, but that's not the point. Any material with mass moving fast enough will suffice. Air, water, paper (aka wood), ...

saw this in the other thread, it's pretty funny, and doesn't make sense compared to the 911 collapses. could it be structural differences or faulty construction that made the wtc buildings crumble like they did? ... or maybe size?

To make conclusions would be a bit rash. Of course the construction was different. Of course the mass was different. Of course the scale was different. Suggesting faulty construction as an absolute no-no in my opinion. Excuse the tone, but...a ludicrous suggestion. But again, the point is that in absolutely no way whatsoever was "total global collapse inevitable after initiation", which irrespective of changes in scope makes a mockery of the NIST assumptions post initiation of each WTC Tower descent. It also highlights a few fundamental issues with any crush-down or crush-up scenario. A point to keep in mind is that the building in the failure clip would appear to be constructed of materials much more prone to 'crumbling' relative to the steel framework of the Towers, in which only concrete flooring and a few partition walls were capable of 'crumble'. Another point would be that the 'tipping' cap does not suddenly drop vertically, but humerously does a bit of rolly-polly, in stark contrast to the behaviour of each 'tipping' tower cap. The first clip in the thread you looked at is even more damning for the crush-down and crush-up hypotheses, as a decent period of near free-fall ensues before arrest.

Another very important factor to bear in mind is that, as with all tall buildings, specific information relating to how one might go about bringing them down was known whilst they were still om the drafting table. The execution of each descent was, to put it mildly, expertly accomplished...IMO :)
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Re: questions.

Postby iconoclast » Tue Aug 04, 2009 5:08 am

Sure, but consider the effect of an 'explosion'. To 'slice' it'll have to be some pretty fast moving air, and very focussed, but that's not the point. Any material with mass moving fast enough will suffice. Air, water, paper (aka wood), ...


i was under the impression that explosives create jarring shockwave effects using chemicals and heat, that move materials outward breaking them at weak areas in a general way rather than targeted cutting or piercing.
but after thinking about it for a while i tend to agree with you, there's probably a way to do it under special conditions.

To make conclusions would be a bit rash. Of course the construction was different. Of course the mass was different. Of course the scale was different. Suggesting faulty construction as an absolute no-no in my opinion. Excuse the tone, but...a ludicrous suggestion.


i guess so, but i try to rationalize things without going too far into the crazy zone.
over at the jref forum they are claiming that the failed demo building held together because it was a strong well built reinforced concrete structure, which seems odd to me, my understanding is that concrete is more likely to break apart than steel, but maybe it's because the wtc buildings had so many connections and this building was more solid and less tall, i think around 80ft.
this building was built in 1928, i'm surprised it held up so much better than more modern buildings.

But again, the point is that in absolutely no way whatsoever was "total global collapse inevitable after initiation", which irrespective of changes in scope makes a mockery of the NIST assumptions post initiation of each WTC Tower descent. It also highlights a few fundamental issues with any crush-down or crush-up scenario. A point to keep in mind is that the building in the failure clip would appear to be constructed of materials much more prone to 'crumbling' relative to the steel framework of the Towers, in which only concrete flooring and a few partition walls were capable of 'crumble'.


yeah, i agree.

Another point would be that the 'tipping' cap does not suddenly drop vertically, but humerously does a bit of rolly-polly, in stark contrast to the behaviour of each 'tipping' tower cap. The first clip in the thread you looked at is even more damning for the crush-down and crush-up hypotheses, as a decent period of near free-fall ensues before arrest.


right, what surprises me is how it holds together after hitting the solid earth, whereas the wtc buildings come apart in on themselves, i always since the beginning of my research expected the wtc buildings to partially become crushed and have large portions remain somewhat intact, ie like the two failed demo clips posted.

Another very important factor to bear in mind is that, as with all tall buildings, specific information relating to how one might go about bringing them down was known whilst they were still om the drafting table. The execution of each descent was, to put it mildly, expertly accomplished...IMO


in 93 the terrorists(supplied with real bombs by the fbi) thought they could bring the tower down with a truck bomb so i wonder how expertly it needed to be done, however i do tend to think it was expertly done.
i lean towards a highly sophisticated controlled and intentional process more than i lean towards a natural process resulting from fires.

you're pretty smart femr maybe you can give me a guess on what happend in these two clips from my original post. you've most likely seen these clips before but i've yet to get a good answer.


5: http://www.youtube.com/watch?v=IX9gdRST6zM
can anyone explain this squib/pressurized air way below the collapse?

3: this is a newer video of wtc7, an odd veritcal line of what looks like black smoke is poofed out as collapse starts.
why such a straight line? i don't understand how the smoke would just come out of those windows and none of the other nearby areas.
http://www.youtube.com/watch?v=3ujWitEr-Ww&
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Re: questions.

Postby femr2 » Tue Aug 04, 2009 11:49 am

iconoclast wrote:...but after thinking about it for a while i tend to agree with you, there's probably a way to do it under special conditions.

Cool.

i'm surprised it held up so much better than more modern buildings.

They don't make 'em like they used to :) But seriously, there cannot be direct comparisons drawn in my opinion, though the reason for posting it is simply to highlight that total global collapse is NOT inevitable after initiation, that descent through the path of greatest resistance is NOT the obvious route, that a tipping cap does NOT always then drop vertically, and basically that getting a building to drop through it's footprint is very difficult indeedy...

right, what surprises me is how it holds together after hitting the solid earth, whereas the wtc buildings come apart in on themselves, i always since the beginning of my research expected the wtc buildings to partially become crushed and have large portions remain somewhat intact, ie like the two failed demo clips posted.

Indeed. The total lack of any kind of 'pile driving' mass at the base is a big give-away in the WTC events. The catch-22 for the Official narrative is that in order for each descent to have occurred in the times witnessed, an enourmous pile driving mass is required. The lack of such a mass simply highlights the nature of each descent.

in 93 the terrorists(supplied with real bombs by the fbi) thought they could bring the tower down with a truck bomb so i wonder how expertly it needed to be done, however i do tend to think it was expertly done.

If the truck had been placed differently, it is probable that the tower would have come down in a manner much more akin to 'tipping over', causing inconceivable levels of destruction to neighbouring structures. Given the scale of each Tower, the actual destruction caused the absolute minimum of collateral damage to surrounding structures. Incredibly well done.

maybe you can give me a guess on what happened in these two clips from my original post. you've most likely seen these clips before but i've yet to get a good answer.

I'll give it a whirl...

5: http://www.youtube.com/watch?v=IX9gdRST6zM
can anyone explain this squib/pressurized air way below the collapse?

Each Tower was essentially constructed as three separate 'stacked' buildings, with the mechanical floor regions used to separate each section. The mechanical floor regions were substantially stronger than the other floors, and in order for an even descent progression to occur it would be important to weaken each mechanical floor region in advance of any descending tower portions above. I have recently started the following thread highlighting the diagonal ejecta seen on the face of WTC 1, which may be of interest:
http://the911forum.freeforums.org/wtc-1-diagonal-slice-t193.html
My bottom-line simple view is that the tower was effectively 'sliced' diagonally under the mechanical floor regions to ensure that there was no possibility of arrest during the descent. Such 'slicing' would invoke slow, but steady internal descent, with a definite guiding motion in one direction...much like felling a tree. The additional weakening of the mechanical floor regions themselves is pretty clear:
http://the911forum.freeforums.org/wtc-2-mechanical-floor-damage-t183.html
I could guesstimate lots of additional detail, but etc... :)

3: this is a newer video of wtc7, an odd veritcal line of what looks like black smoke is poofed out as collapse starts.
why such a straight line? i don't understand how the smoke would just come out of those windows and none of the other nearby areas.
http://www.youtube.com/watch?v=3ujWitEr-Ww&

I've just uploaded a very high resolution copy of the WTC descent, which shows the progression of the shockwave through the building on the other side of the building:
http://www.youtube.com/watch?v=Bx2Kx2AkXEg
It would be important to weaken both sides in order to bring the building down symmetrically, which explains the similar ejecta progression on the side you reference. If you think about how you would plan a demolition, taking core resistance into account, and that you'd be attempting to ensure, for WTC 7, that the outer walls 'fold in' over the internal structure, then it makes a lot of sense...

I suggest these features are discussed in more detail on a WTC 7 thread here.
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Re: questions.

Postby iconoclast » Wed Aug 05, 2009 3:54 am

though the reason for posting it is simply to highlight that total global collapse is NOT inevitable after initiation, that descent through the path of greatest resistance is NOT the obvious route, that a tipping cap does NOT always then drop vertically, and basically that getting a building to drop through it's footprint is very difficult indeedy...


i agree with this statement and pretty much everything else you posted.

My bottom-line simple view is that the tower was effectively 'sliced' diagonally under the mechanical floor regions to ensure that there was no possibility of arrest during the descent. Such 'slicing' would invoke slow, but steady internal descent, with a definite guiding motion in one direction...much like felling a tree.


i think i understand your position, for the sake of considering both sides and the natural collapse theory could you speculate how this anomalous ejection of material in the clip i posted could somehow have been created naturally?
ie a way that doesn't involve intentional weakening of the structure?
this clip seems like overwhelming evidence of something going on that is not consistent with the official story.
imo, the toughest clip i've seen yet to rationalize and connect with oct.

I've just uploaded a very high resolution copy of the WTC descent, which shows the progression of the shockwave through the building on the other side of the building:
http://www.youtube.com/watch?v=Bx2Kx2AkXEg


wow... so this is the other side of the building eh? maybe if it happend on one side you could partially explain it away as being caused by the fires.
i'm not that researched enough to know all of which floors were burning but i'm pretty confident that fires don't burn in straight lines on each side of the building, fires tend to move around and spread in such ways that these patterns don't seem to agree with.

this helps me further form my opinion, thanks for that vid clip, i'd never seen that one before.
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Re: questions.

Postby femr2 » Thu Aug 06, 2009 4:22 am

iconoclast wrote:
My bottom-line simple view is that the tower was effectively 'sliced' diagonally under the mechanical floor regions to ensure that there was no possibility of arrest during the descent. Such 'slicing' would invoke slow, but steady internal descent, with a definite guiding motion in one direction...much like felling a tree.

i think i understand your position, for the sake of considering both sides and the natural collapse theory could you speculate how this anomalous ejection of material in the clip i posted could somehow have been created naturally?

There have been numerous suggested explanations, such as air pressure, HVAC funnelling , etc...but none of the 'natural' suggestions really stack up.

Achimspok (and Peterene ?) have performed studies of the 'squib' ejecta from WTC1 in detail, and I think the closest I could get to suggesting something other than 'explosives' would be, as per the studies mentioned, that descent of the internal core in advance of the primary wave of destruction could cause some similar ejecta. I'll locate the video links unless Peterene beats me to it...

It has also clearly been shown, by a method termed "motion detection by subtraction", that the major 'squib' ejecta events cannot be due to air pressure caused by the descent of the cap itself, as the initial ejecta occurs before any vertical cap motion. The air pressure theory is a ludicrous suggestion in the first place, which requires us to go through the hoops (spend our time) proving the suggestion wrong, but it's done now, so that one is out of the window (Pardon the pun :) )

A factor I think has been missed is the sheer scale of the ejecta. The physical dimensions of each 'squib', the velocity at which they occur, and as I've mentioned, the strategic placement.

I'm not able to suggest a cause which could be explained by gravity driven and unassisted 'collapse'.

IF such ejecta was caused by an 'inert' mechanism, then it would imply that every single 'collapse' hypothesis was also woefully incorrect.

http://www.the911forum.freeforums.org/what-caused-wtc2-s-66-pre-collapse-coordinated-smoke-puffs-t20.html

Perhaps a new thread should be posted to look at each 'squib' in isolation...if there is not one here already. Will have a trawl.
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Re: questions.

Postby peterene1 » Thu Aug 06, 2009 11:51 am

Achimspok did the whole analysis. (I'm more restriced to the story on the inward bowing and WTC7).

Anyway, these are his video concerning the dust jets.

http://www.youtube.com/watch?v=G54HRMUcPGE

http://www.youtube.com/watch?v=WPtgp0RMFT4

http://www.youtube.com/watch?v=acTcwA_YHuA
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