The Lesics World Trade Center 9-11 Videos Explaining the Collapses for Lay People

[Axxman300]

I debated sticking these in a thread, but saw no reason to revive a dead topic.

Lesics is an engineering education channel whose goal is to explain complex engineering topics in easy to understand formats. Their 9-11 World Trade Center collapse videos are excellent resources. I'll post them in reverse order as they released these last two in the past week:

Solving the Mysteries of the WTC Collapse (Can Aluminum Cut Steel?):

https://www.youtube.com/watch?v=m-Haf79ygQY

How Did WTC-7 Collapse?:

https://www.youtube.com/watch?v=KMvCWFCoVN4

The Collapse of the World Trade Center:

https://www.youtube.com/watch?v=1NkBfLBov5Q&t=356s

The WTC-7 video is a standout. I learned a few things, and the graphics are top-notch.

(If someone wants to embed these into the thread that's cool. I'm technically handicapped)

 

[bknight]

I debated sticking these in a thread, but saw no reason to revive a dead topic.

Lesics is an engineering education channel whose goal is to explain complex engineering topics in easy to understand formats. Their 9-11 World Trade Center collapse videos are excellent resources. I'll post them in reverse order as they released these last two in the past week:

Solving the Mysteries of the WTC Collapse (Can Aluminum Cut Steel?):

https://www.youtube.com/watch?v=m-Haf79ygQY

How Did WTC-7 Collapse?:

https://www.youtube.com/watch?v=KMvCWFCoVN4

The Collapse of the World Trade Center:

https://www.youtube.com/watch?v=1NkBfLBov5Q&t=356s

The WTC-7 video is a standout. I learned a few things, and the graphics are top-notch.

(If someone wants to embed these into the thread that's cool. I'm technically handicapped)

Good videos, but like all the scientific and engineering information concerning the accident it will be disregarded by those who choose to stay willfully ignorant.

 

[Oystein]

...
The WTC-7 video is a standout. I learned a few things, and the graphics are top-notch.
...

Unfortunately, it has at least a couple of claims so dead wrong, I am not sure the remainder is worth much.

Error #1: He claims that columns 79-81 all buckled and collapsed due to them failing from the heat of fire. I am not aware that there exists any study that bears out that scenario. He ignores completely that all prevailing hypotheses start with floor/girder/beam failures, that left the columns unsupported, and then the columns buckled.

Error #2: He has the North wall columns above the transfer girders set off to inside the perimeter columns below those transfer girders. In reality, the top part of the wall was outside the bottom part.

Correcting for these errors would not change much of the rest of the video, but the fact that Lesics makes such glaring errors in the first place deprecates the video, in my opinion.

Also, in the "plane-crash" video, I had to cringe when he argued that a certain temperature was exceeded by the "jet-fuel fires" - ignoring, like too many Truthers, that most of the heat was fuelled by office contents.

 

[cjnewson88]

There's a few errors in those videos, nothing major, but enough for 9/11 Deniers to latch on to. As an example, his claim that WTC7 never reached free-fall, and that the only videos which do are those deliberately edited and 'sped up' is completely false.

 

[Mark F]

Unfortunately, it has at least a couple of claims so dead wrong, I am not sure the remainder is worth much.

Error #1: He claims that columns 79-81 all buckled and collapsed due to them failing from the heat of fire. I am not aware that there exists any study that bears out that scenario. He ignores completely that all prevailing hypotheses start with floor/girder/beam failures, that left the columns unsupported, and then the columns buckled.

Error #2: He has the North wall columns above the transfer girders set off to inside the perimeter columns below those transfer girders. In reality, the top part of the wall was outside the bottom part.

Correcting for these errors would not change much of the rest of the video, but the fact that Lesics makes such glaring errors in the first place deprecates the video, in my opinion.

Also, in the "plane-crash" video, I had to cringe when he argued that a certain temperature was exceeded by the "jet-fuel fires" - ignoring, like too many Truthers, that most of the heat was fuelled by office contents.

I suspect Lesics simplified things for their intended audience. These videos were not intended to be exhaustive and point-by-point but rather broad overviews for people largely illiterate on the topic. While not perfect, they are sufficient for that crowd.

 

[Oystein]

I suspect Lesics simplified things for their intended audience. These videos were not intended to be exhaustive and point-by-point but rather broad overviews for people largely illiterate on the topic. While not perfect, they are sufficient for that crowd.

Well, tales of Santa and the Christ child simplify things for their intended audience. While not perfect, they are sufficient for that crowd. Until, of course, someone in the crowd finds out those are dead wrong and call you out.