WTC Simulation Part 2 - Journey to the Final Result: From Failures to Findings (2022-2024)

[@kevinbarbeau]

Seeing all of these floors get flattened against each other and knowing that over 2000 people were inside of the two towers at the same time is pretty horrifying.

[@itz.bbhrains2]

Actually only around 1000 people were in each tower still devastating but i guess it takes a load off the mind.

[@henryford2950]

I suspect the number was actually far less, but to each their own.

[@kevinbarbeau]

@@itz.bbhrains2 My bad yeah, I meant 2000 across both, if I remember correctly around 600 people were trapped in the south tower and around 1400 in the north tower

[@itz.bbhrains2]

@@kevinbarbeau mhm

[@KaiKostack]

A quick reminder: This video is focused on scientific simulations and does not endorse any conspiracy theories. See the video description for details.

[@SomeAverageYoutuber]

I’m the final simulation, will both towers be simulated simultaneously or will they be simulated separately?

[@toyoprev]

Will you also be doing a simulation of the planes hitting the towers

[@KaiKostack]

@@SomeAverageKZbinr The towers are simulated separately because otherwise it would be too much for the computer and the simulation would take forever.

[@KaiKostack]

@@toyoprev That is not planned at the moment, but I would not rule out the possibility of trying it out at some point.

[@toyoprev]

@@KaiKostack ok thank you

[@dylbie]

Incredible work! The 'Component Tests' part is absolutely amazing. I can see you were having the same issues that I encountered whereby the initial shock of the collapse makes the tower fail at the base. Incredibly difficult to solve but it looks like you've sorted it. This has to be one of the most complex simulations ever done. You should win some kind of prize for this project.

[@RagingKoala]

I love how the sliced segment at 6:16 of the South Tower-even though it’s still not quite as accurate as it should be-is still very close to how the collapse actually progressed. Especially with the core still remaining after the initial collapse as it did remain in both towers for a few seconds afterwards. Can’t wait to see the final results!

[@AndyHappyGuy]

Can't wait for the final video!

[@BetweenTwoTowers]

Hi, Amazing work. im the Co-founder and admin of the 9/11 Archive and 9/11 Media Preservation Group. id really like to get a chance to hear from you. as well as if theres any resources you need we'd gladly assist in any way. we have full sets of building plans as well as im in contact with several Port Authority Engineers who worked on the complex. thanks.

[@KaiKostack]

Thank you very much and thank you for the offer of help! I think I have most of the documents that have ever been publicly available. Here is what springs to mind: I was particularly missing high-resolution drawings of the underground levels with the PATH terminal, I only have low-resolution files "SKA10-84" ff. There is a "Masterplan" named pack in good resolution, but that is from 1963 and the terminal was still missing from it. I am also missing complete drawings of buildings 3 to 6, including sections. I only have the early draft from 1963 with all the buildings, which probably also changed after that. These drawings may already be somewhere in my archive, but that is really a lot of files. If they have ever been published, then perhaps a keyword that I could search for would help me. What would be particularly helpful is if any drawings were available as vectors, Autocad, DWG, DXF, etc. Almost all the plans I have are bitmaps. Source data is always the most accurate and then the resolution doesn't matter. But don't feel pressured to get all of this now. This project is about showing how the collapse behaves in principle, we don't need every detail for that.

[@BetweenTwoTowers]

@KaiKostack I have two PDFs that were released by the Port authority which pretty much cover everything your looking for except WTC 6, there isn't really any public info on it unfortunately. I can send them via email or if your on discord.

[@KaiKostack]

@@BetweenTwoTowers Please send it to the email address in the channel info and I'll take a look. Thank you.

[@laurencebois5119]

I remember seeing a video of the moment one of the towers fell where it seems as if the entire upper section of the facade was being supported by a single column

[@TatersEatsCrayons]

I think i know what you’re talking about. I think it was a part of the core that was still standing before the rubble from the bottom took it out

[@toyoprev]

@@TatersEatsCrayons in both collapses a section of the core stayed standing for about 10 seconds and then fell down I think in the first collapse it was something like 60 stories of the core

[@TatersEatsCrayons]

@@toyoprev yeah it looked about half the tower height

[@laurencebois5119]

@@TatersEatsCrayons I remember that one too, but the one I was talking about happens at the top. I found the clip, about 30 seconds in to it, the section of the facade above the impact seems to fail in a V-shape to a point in the impact site. kzbin.info/www/bejne/qKG0aZymn8xkmJI

[@TatersEatsCrayons]

@@laurencebois5119 ah i just watched the clip i see what you mean thats interesting

[@lugiamastero13]

Amazing this video shows a lot of details i have figured out about the collapses over the years. I noticed that the floors fell first the exterior peeled away and then the core remained for a few moments before the bottom cracked and crumbled. One thing i always remembered about the south towers collapse is when the top section of the building that thing dissappears behind the dust then a fat chunk of the exterior pops out mostly intact from what once attatched to the top block near the roof

[@james_fisch]

That's precisely what I think of when looking at simulations of the collapses with a careful eye due to my morbid fascination with its mechanism. The south tower's collapse is interesting watching so many floors tilt, disappear into a cloud of dust, with what I assumed was the top floors exterior columns breaking apart from the roof and hat truss when coming out of the cloud. I've tried figuring out in my head how those pulled apart like that for years, and it wasn't until the final bit in this video where it really began to make sense. I think Kostack has said before that after they've finished simulations of the Twin Towers, WTC7 would be coming up. I'm really interested in seeing how that turns out as it seems for a lot of people, visualizing how the collapse happened internally prior to its shell collapsing is difficult when the smoke obscured the south face of the building.

[@7249xxl]

did you take into account the different strength levels the towers had? They are comprised of 3 components each varying in column thickness and truss complexity. This is why each part was labeled because the upper most outer sections were 1 think 2/3rds thinner then the parts in the base. This could solve your shock propagation issue as the base

[@lajoswinkler]

You are on a good lead, but things were more complex. Each of the three sections also had tapering of column box walls throughout their heights AND throughout the perimeter at each floor. But yes, shock propagation seen in the simulation seems to originate in columns being simple rods of identical properties when they're supposed to be difficult to squish/bend boxes.

[@lajoswinkler]

It is possible you are seeing structural failures way down the model because your basic column elements are just rods which makes the whole model so tight. Columns of these towers were, unlike what lying nutters preach, not solid steel, but _steel boxes with walls that tapered towards the top_ , being few millimetres thick at upper floors. Also, thickness of outer column walls varied across each floor. It was quite an elaborate system designed to maximize lateral load capabilities. You can find these blueprints in the final investigation done by NIST. This arrangement played a huge role in the behaviour during the collapse and it's why the lower parts remained connected while the tops were crushing their way down. Growing pile of falling mass against growing resistance. All in all, you're making better and better simulations each year. Keep up the good work. As models are improved, as computing power available to individuals gets higher, so will this model approach the observed reality of that terrible day.

[@WasFakestCenturyAesthetics]

lol it's "nutty" to think that these total, rapid, vertical skyscraper failures had something in common with 99.9% of other total, rapid, vertical skyscraper failures in history...but totally not nutty to come up with a brand new unprecedented skyscraper collapse phenomenon with no reference to any physical evidence or physical experiment solely in order to conform to your desired conclusion.

[@adamk203]

@@WasFakestCenturyAesthetics it's nutty to think that a group of people went through such insanely elaborate steps and spent trillions of dollars to "put on a show" of controlled demolition.

[@WasFakestCenturyAesthetics]

@@adamk203 oh hey there! It's the guy who said he had "loads of examples" of skyscrapers collapsing in such a preposterous manner but then couldn't name a single one! How are ya

[@adamk203]

@@WasFakestCenturyAesthetics except that I never said that. I said there were plenty of examples to search for, but you expect me to be your personal genie and provide them for you. Never mind that that is a complete straw man to begin with and you completely dodged my comment. Conspiracy theorists can’t form a proper argument it seems…

[@WasFakestCenturyAesthetics]

@@adamk203 lol you're incredibly dishonest

[@MFitz12]

Fascinating stuff. The models of things that didn't happen are as fascinating as what actually happened. That tease at the end is not enough. Eager to see the final result.

[@Frontier327]

Thanks for all your work on this.

[@lideng7736]

Actually, when I was in college, I really liked science classes. I passed the exam with my hard work and got 100 points. I also really liked science.I love science too. Thank you.

[@IanZeAlien]

I remember seeing the 1.0 version of the WTC collapse simulation videos from years ago. I'm so glad this popped up randomly for me. Been wanting to see a very detailed simulation of the collapses, as well as the neighboring damage, to see how it "looked like" under the smoke and fire.

[@robertdallara4981]

Definitely seeing the banana peeling / wedge-in effect of the top section in that last simulation there, just like in the real collapse videos! Might be good to "color code" the columns of the top vs bottom section so we can more easily discern the behavior of both the perimeter and core columns during the collapse. It would also tell us how intact the top section remains throughout the whole collapse. It will be very interesting to see what the final simulation will show happening to the core columns of both the top and bottom sections...

[@hengineer]

I took an engineering ethics class in 2004. The Design and Construction was part of the ethics discussion and I distinctly remember a video regarding the cross structural beams and how they weren't designed for the different loading the way heat expanded them, not to mention the changes with regards to making the buildings even economically viable for rent. It was a very fascinating discussion I remember having but the video itself was also very interesting (not to mention I remember the fireproofing that was supposed to be installed around the structural beams was short-changed by the contractor who was supposed to install it).

[@Thorvald9666]

Yet people are like "bUt WhY dId WtC 7 fAlL??" as it gets swiss cheesed by terminal velocity steel girders.

[@BobKermanKsp1]

oh, and they also miss the fact it was burning for hours

[@HAWAIISURF808]

@@BobKermanKsp1 so regular fires melt steel beams now?

[@BobKermanKsp1]

@@HAWAIISURF808 Yes, especially when they're burning for several hours on multiple floors on a building that has been hit by debris from what was the tallest tower in the entire north (and i'm pretty sure southern) american continent, and is very unstable because of that

[@HAWAIISURF808]

@@BobKermanKsp1 a regular fire will not melt steel, and even after being crushed by part of the tower that does not mean it would collapse straight down as it did.

[@BobKermanKsp1]

@@HAWAIISURF808 sure steel won't melt, but it will weaken, like, it'll weaken a lot, weakening as much as 50% in 1000°F-2000°F temperatures, which so happens to be the temperature of an average building fire

[@ashtondoublet8334]

Wow, even if these aren't the final products, they still are extremely accurate and remarkable. Makes me continue to question how in the world Will Jimeno and John McLoughlin survived underground and between both towers. Keep doing the great work you do Kostack Edit: also if you read this Kostack, have you considered studying and make an animation of the Pentagon collapsing on 9/11, it may be hard because there's little footage of the collapse, but it may be another interesting project for you to consider in the future.

[@BobKermanKsp1]

*sigh* **opens comments and goes to "newest" tab**

[@LetsGame-fs2qg]

It’s so cool your using your WTC 7 model from your older vids

[@scottreed240]

Incredible work!

[@Averagebloxy]

This project has gone a long way and this honestly kinda reminds of teardown with all the voxels and stuff

[@viktorrietveld]

Blender? Brave man!

[@Billythe406]

I would like to see a version where just the TOP section collapses. I want to see if it still would fall in a “freefall”. But man, awesome work!

[@OSTARAEB4]

I remember the North Tower peeled back as if in slow motion and plumed skyward with smoke analogous to old WW2 ships belching smoke through their stack. It was surreal. They were there and then they weren’t. Eternal RIP memory.

[@fujirari]

Thank you for the time it took to put this together

[@awedelen1]

fascinating

[@Akareyon]

Again, amazing animations! Your poor CPUs... tasteful soundtrack too. Will the final model be open sourced?

[@sheldoncampbell2139]

the simulation is showing a collapse from the ground floors for WT1 and 2?

[@TheOakleysworld]

Nobody ever talks about those giant spheres on 9/11, just about the planes. Makes you wonder...🤔

[@Damidas]

What giant spheres are you referring to?

[@TheOakleysworld]

@@Damidas exactly.

[@therealtony2009]

The people forget about the giant bullseyes painted onto the towers

[@JosephTobin1]

The south tower was leaning at a angle of almost 3 degres when it fell. It was almost imperceptable except if you were within a 5-6 block radius. Perhaps this can help a bit

[@yoloyuno]

part 2 less goo

[@michlo3393]

Was there a lot of goo in part 1?

[@VojtaTravnik-cj2xo]

how much time do these renders take on average?

[@Arkadiusz-l9j]

Nuclear controlled demolition. Each tower had radio controlled mini nuclear devices 50 metres under the fundaments. The towers where pulverized.

[@franc8023]

US: "what are you doing with my inside job??"

[@Mr.Alex1995]

Omg new collapse simulation!

[@Fernandosampaio_]

Another banger!!! 🎉🎉

[@TEMPLE7D]

Remains were found on the roof of that orange building before they demolished it.

[@2WLITL]

Something might need to be corrected. WTC 3 split in half by the first tower that fell, and then when the other one fell it fully collapsed

[@jalenbarlow1303]

Read the description.

[@runesvensson1244]

I don't think the bottom of the towers collapsed as shown in the video.

[@mikakettunen7939]

How many polygons are in this sim all together to sim?

[@SomeAverageYoutuber]

Part 2 let’s go

[@CaseysRepository]

Here comes the people that think they are the smartest to exist

[@BrakeCoach]

7:51 nice detail on the plaza. Did the sphere actually land that far away from its place?

[@lainpika6901]

The music choice is annoying

[@damncat2793]

Have you stopped working on Dicing Engine? If so, could you please release a Demo version if you abandoned the project so other people can try it?

[@KaiKostack]

There is the idea to integrate it into an established game engine, but so far there has been no time.

[@jmoy4408]

Great!

[@four4eight]

This is amazing but is it just me or does each towers pile seem too high that in irl?

[@jackcrawford304]

Watching the floors stack almost perfectly at probably over 100 mph into a solid aluminum block knowing all the people inside… first time 9/11 content of any kind has nearly made me throw up… Absolutely sickening.

[@Ch3szdev]

The beamng devs need to hire you

[@お気に入りチャンネル]

I think you should add more smoke because at the footages of the collapse has more smoke,so much smoke that you cant even see the debris

[@MFitz12]

That would completely defeat the purpose of the models.

[@UncleBurrito15]

How stable is the simulation? How long can the structure hold itself with no external forces

[@KaiKostack]

Very stable. Without a trigger (or faulty setup) it would not collapse.

[@UncleBurrito15]

@@KaiKostack That's awesome. Having such a huge and heavy model stand up on its own in blender is quite a challenge. Would love to see more in the future.

[@lideng7736]

I hope you can turn all of this into a game. Thank you, author. I hope you can make a game. I will wait.

[@22YT_]

How do we get the world trade model?

[@Planes_man]

nice

[@michaelstrahan2.0]

Question: Did the upper floors collapse down onto the bottom floors?

[@MixyBacart]

0:52 ☠️☠️☠️

[@WarhammerWings]

These have me shaking my head. The Twin Towers never fell like that. Look at actual footage!!!!

[@MFitz12]

Did you not read the title? Or the description? Or follow the previous Twin Towers model videos? Context is everything.

[@grantfurr580]

The buildings did not collapse in this faction...the collapses started at the impact point and peeled the building apart as the debris fell you can see in a few videos that the bottom of the towers from about the 40th floor down was still intact when the debris started to hit the ground...

[@MFitz12]

Well yeah! Did you not read the title, or the description? These are not meant to be the accurate final models. _In this video, I present a series of later test simulations of the 9/11 World Trade Center (WTC) collapse. These simulations reflect different stages of the development process and are not intended to represent the final or most accurate models_ Congrats on completely missing the point.

[@AlexAguinaga-m5g]

Cada vez se confirma más que fue caída por los aviones y no por bombitas escondidas

[@lajoswinkler]

It was confirmed *back in 2005* that it was because of the combination of widespread structural damage and fire that was immediately ignited on so many floors. Neither of the events were included in the design. Their combination... absolutely outside of any design. There really isn't anything suspicious with this. Primary report by FEMA was badly done, but NIST's was totally fine. It's the relentless work of the conspiracy idiots that has sadly pushed the absurd narrative of "planted bombs" into the accepted mainstream. Just pure human idiocy. While we could discuss about political ramifications of this tragedy and possibly willful ignoring of signs by the state agencies, the physics alone is untainted. There is literally nothing suspicious about what happened that day.

[@andyjennings15]

That's not even how it fell....

[@superhuber]

shh don't ruin their narrative. WTC collapsed like a house of cards. The floors separated from the core without any resistance all the way to the ground and as a result everything land 15 floors underground. That's how it was and it all happened in accordance with the laws of physics.

[@MFitz12]

You probably should have read the title, and the description.

[@RagBrokeHisThumb]

Miss dicing engine

[@Ergoziser]

Please tell me, where is this scientific?.

[@user-dv4uo5oj4o]

In actual footage the spire started moving first.

[@MFitz12]

No. The perimeter columns on the west side bowed and buckled, causing the antenna to move. If you look at it from the wrong angle you don't see the important bit.

[@user-dv4uo5oj4o]

@@MFitz12 there are footage from all sides. And antenna started falling first. Despite official version claims that the destruction was initiated by sagging of floor trusses at the point where planes hit.

[@MFitz12]

@@user-dv4uo5oj4o - Yes, there is footage from all sides and I suggest you avail yourself of it. YOU ARE WRONG.

[@user-dv4uo5oj4o]

​@@MFitz12 you're just trying to justify the official version at any cost, ignoring what your eyes see. Read chapter 2 of FEMA report, where it is stated "Review of videotape recordings of the collapse taken from various angles indicates that the transmission tower on top of the structure began to move downward and laterally slightly before movement was evident at the exterior wall".

[@MFitz12]

@@user-dv4uo5oj4o - I am defending what happened. Accusing someone of _defending the official version_ is a hand-wave, a substitute for thinking. And why are you quoting FEMA??? FFS 🤦‍♂

[@TheBeefIsKing]

Not accurate at all

[@jalenbarlow1303]

Read the description. "In this video, I present a series of later test simulations of the 9/11 World Trade Center (WTC) collapse. These simulations reflect different stages of the development process and are not intended to represent the final or most accurate models. Instead, they provide a behind-the-scenes look at the iterative process required to enhance our understanding of such complex structural failures. By sharing these failed attempts and prototype simulations, my goal is to illustrate the challenges and learning experiences that were crucial for refining the model of the WTC collapse over time. This video offers a glimpse into the development journey, emphasizing the importance of experimentation and analysis in achieving more accurate results. Please note that this is not the final version of the World Trade Center collapse simulation but a collection of tests conducted during the research phase. A more refined and accurate simulation will be released soon."

[@ayrtonvillalobos4213]

Completely wrong simulation. Whoever made this depiction made it all up in their head. 💀

[@MFitz12]

Well yeah! Did you not read the title, or the description? These are not meant to be the accurate final models. Congrats on completely missing the point.

[@tylermanzi2190]

Cause we always assume bigger the builds then the stronger and better

[@oufukubinta]

It didn't happen like that - there were no bombs at the base of the building...

[@MFitz12]

Please read the title, and the description.

[@BobKermanKsp1]

Please do what Mfitz says

[@ewerybody]

So, WAS IT an INSIDE JOB then?!!? 😂

[@ewerybody]

just kidding! Awesome work!!! 👍

[@tylermanzi2190]

This proofs that the towers were weak 😢

[@lajoswinkler]

Not at all. This proves nothing of such matter. Towers were extremely resilient and that has been proven by the fact they remained standing for such long time after being ravaged by impacts and sudden multistorey office fires. What happened that day exceeded their design by way more than an order of magnitude. Classical buildings such as Empire State Building would've probably collapsed right after impact.

[@tylermanzi2190]

@lajoswinkler I just see that steel is a hard, flexible iron thing! Concrete is a strong stiff rock thing! Steel naturally can't hold a long time high heat wait then a concrete naturally can.

[@tylermanzi2190]

@lajoswinkler and the empire state building seems stronger then the towers due to the fact that it's a small bold concrete crowed building cause it provides more colloms to helps support the weight above if a top floor is damaged or burn

[@EthanF175]

this is not how the buildings collapsed.....this is just wrong

[@MATX_EDITZ]

it said in the title "failures and findings" not "accurate simulations"

[@EthanF175]

@@MATX_EDITZ ohhhh

[@盧璘壽로인수]

@@EthanF175 reading comprehension

[@盧璘壽로인수]

@@EthanF175 reading comprehension

[@jonathanperry6302]

lol impossible that would happen from a plane strike alone. Plain impossible. 😂

[@lajoswinkler]

And it did not. It happened because of sudden multistorey fire acting upon loadbearing elements under higher than normal stress. We saw the airplane strikes did not cause the collapses. The towers remained standing. The question is, why are you so willfully stupid and spewing bullshit?

[@BFGman04]

Prove it Come on, give me a reasonable answer instead of some assumption

[@Panzermanzer]

Well explain to us what happened since apparently you have a degree in physics and engineering

[@Guest-ok8fl]

You really think the impact of the plane crash alone can make these towers collapse?

[@Semper_The_Player]

They were more factors than the impact

[@Leg-xx5md]

Controlled Demolition, no such thing as a conspiracy theory. Now who was responsible for this horrific act, is another story.