Originally posted by DeepThought
After playing on their site for a while, which is more fun than the subject area sounds, I did a quick literature search and found a paper on the effect of vertically travelling fires [1]. In the abstract they have the following sentence:[quote]The collapses of the WTC complex buildings in 9/11 as well as other partial collapses like the ones of the Win ...[text shortened]... papers/download/2018-effect-of-vertically-travelling-fires-on-the-collapse-of-tall-buildings.pdf
Thank You for approaching this with a great measure of professionalism. I realize its not an easy topic to discuss in that manner. I'll give [1] a read.
Did you get a chance to look at my very simplified analysis on page 3? I am aware that the plane would be carrying a very large amount of kinetic energy, but I do think that a large portion of it would be absorbed in the plastic deformations of the perimeter and interior structure. I just wonder if there is anything you can add to it, or take away from it. I admittedly could be missing major things, but my idea was to keep it very simple and start from there if anything in it seems suspicious.
I'll just paste it in here for your convenience.
Here is another ( admittedly basic) analysis that I myself just did, that I feel should raise's some question. The plane impacted the northern face of WTC 1, meaning it flew over WTC 7.
Follow the link to the image:
https://en.wikipedia.org/wiki/File:World_Trade_Center_911_Attacks_Illustration_with_Bird%27s-eye_Impact_Locations.svg
Now conservation of Momentum dictates some of the impact debris should have been blown out laterally to the sides ( East and West) and most to the South, and much less than other directions to the North.
Now see Layout of WTC Complex from the following link.
https://upload.wikimedia.org/wikipedia/commons/1/1e/WTC_Building_Arrangement_and_Site_Plan.svg
Using simple kinematics and other known geometric parameters ( with one unknown postulated parameter - Namely the height of impact) I come to the following result:
Height of WTC 1 = 1,362 ft = y1
Hieght of WTC 7 = 743 ft = y7
Distance between North face of WT1 and South Face of WTC 7 = 370 ft = d ( See link in previous post above to NIST report for parameters verification)
I'm estimating the plane hit at approx 1000 ft = y1' [3] on WTC 1 and using basic kinematics ( neglecting air resistance) The lateral velocity[1] of the ejected material in the Northern direction is can be calculated as follows:
V_North = d*Sqrt( 2*(y1'-y7)/g) = 370[ft]*Sqrt(2*(1000 [ft] - 743[ft])/32.2[ft/s²]) Equation1
V_North = 1500 ft/s (Supersonic Velocity)...I guess Air Resistance should be accounted for, but it would act to retard the impending damage from debris to WTC 7. [2] The question I have is does this make sense? Most of the energy from the hit should have been dissipated in the Southern direction? Its certainly not conclusive, but it seems odd
Edit [1] - I do realize there could ,and most likely were, other components to the velocity of the ejected debris other than purely lateral.
Edit[2] - I will also add that the ejected material would hit lower than the top floors on WTC 7 unless lift at these high speeds was probable.
Edit[3] - Change variable from y1 to y1' in definition and Equation 1
If you demonstrate some obvious flaws and tell me I don't have a leg to stand on I'll let it go. Its a tiring and most likely fruitless pursuit. My general mistrust of authority puts me in these positions. Even though I don't have much of a background for the really complicated analysis ( I'm confident I could take it a bit further than I have), I still like to do sanity checks. However, I'll trust your judgement in this matter over my own as long as you could help me to make sense of your reasoning.
As a note: I would like to say that if you read through the Paper from CTBUH that I posted earlier does not agree to some extent with the NIST report. Why do they go out of there way to state that this disagreement does not lend any credibility with 911 Truth Movement?