georgephillip
Diamond Member
"After the east penthouse collapsed, several seconds elapsed, then the west penthouse began to collapse, at nearly the same time the roofline of the building developed a kink near the center, then all support across the entire width of the building was suddenly removed, a vertical swath of windows under the west penthouse were simultaneously blown out, the building suddenly went limp, and (within a fraction of a second) it transitioned from full support to freefall.
"I am not using the term 'freefall' loosely here.
"I used a video analysis tool to carefully measure the velocity profile of the falling building using CBS video footage from a fixed camera aimed almost squarely at the north wall.
"A video detailing this measurement is available at YouTube/user/ae911truth. I calibrated my measurements with the heights of two points in the building provided in the NIST Building 7 report released in August 2008, so I know the picture scale is good.
"My measurements indicate that with sudden onset the building underwent approximately 2.5 seconds of literal freefall.
"This is equivalent to approximately 8 stories of fall in which the falling section of the building encountered zero resistance.
"For an additional 8 stories it encountered minimal resistance, during which it continued to accelerate, but at a rate less than freefall.
"Only beyond those 16 stories of drop did the falling section of the building interact significantly with the underlying structure and decelerate."
Freefall and Building 7 on 9/11
911SpeakOut.org | The World Needs Truth
"I am not using the term 'freefall' loosely here.
"I used a video analysis tool to carefully measure the velocity profile of the falling building using CBS video footage from a fixed camera aimed almost squarely at the north wall.
"A video detailing this measurement is available at YouTube/user/ae911truth. I calibrated my measurements with the heights of two points in the building provided in the NIST Building 7 report released in August 2008, so I know the picture scale is good.
"My measurements indicate that with sudden onset the building underwent approximately 2.5 seconds of literal freefall.
"This is equivalent to approximately 8 stories of fall in which the falling section of the building encountered zero resistance.
"For an additional 8 stories it encountered minimal resistance, during which it continued to accelerate, but at a rate less than freefall.
"Only beyond those 16 stories of drop did the falling section of the building interact significantly with the underlying structure and decelerate."
Freefall and Building 7 on 9/11
911SpeakOut.org | The World Needs Truth