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How fast were the planes going?

HeyLeroy

Vegan Cannibal
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Oct 14, 2005
Messages
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I've done some preliminary investigoogling but I can't seem to find a reference to an estimate of how fast the planes that hit the two WTC towers were travelling. Can anyone provide a reference? Thanks. It's the last bit of info I need to refute a troofer in a letter to my local paper.
 
Why don't you estimate it yourself, there are enough videos around, the length of the plane is known, count frames and you can estimate, there will be an error margin of course. What's so special about that speed ?
 
NIST stated AA11 flew 443 MPH and UA175 flew 542 MPH.

(page 108 in the Final Report on the Collapse of the World Trade Center Towers)
 
I found this, from wikipedia;

"The planes hit the towers at very high speeds. Flight 11 was traveling roughly 490 mph (790 km/h) when it crashed into the 1 WTC, the north tower; flight 175 hit 2 WTC, the south tower, at about 590 mph (950 km/h)."
 
Why don't you estimate it yourself, there are enough videos around, the length of the plane is known, count frames and you can estimate, there will be an error margin of course. What's so special about that speed ?

Thanks so much for your ever-helpful input, einsteen, but I was looking for something from an official source. I'd like to stay away from guesstimates.

Thanks, Bell and Josh, just what I'm looking for.

What's 'special' about the info, einsteen, is that someone wrote a letter to my local paper expressing incredulity at the towers being brought down by 'isolated kerosene fires'. I agreed, and mentioned that he forgot that both towers were also struck bu jumbo-jets, which is how the aviation-grade kerosene, also known as jet-fuel, was deposited there. I just wanted to know at what speeds the planes impacted the towers. these planes were approximately 300,000 pounds each, and that could possibly induce a little bit of structural damage to a building, don't you think?
 
To give you an idea of just how fast the planes were travelling here is a recent video of an RAF Harrier flyby in Afghanistan (Warning some harsh language as the planes fly over)...


...also 2 others here...



...having watched these videos it then gives you an idea of the kinetic energy involved when something many times the size of those harriers hit the WTC etc.
 
Last edited:
Here's the letter I'm responding to:


:words:

The rough draft of my letter:

Mr. Bxxxxx, reading your letter I agree on one point: The two World Trade Center towers were certainly not brought down by isolated kerosene fires. You fail to mention that both towers were struck by 150 ton jumbo jets traveling at hundreds of kilometers an hour. This explains the presence of aviation-grade kerosene, also known as jet fuel. Call me naïve, but when I witness two 300,000 pound planes strike two buildings, and those buildings collapse, I’m convinced it’s because of the planes. As are the legions of physicists, mathematicians, structural, mechanical, civil and chemical engineers who have studied this occurrence intensively. In what area of expertise do you hold a degree?
You state that almost half of Americans believe US government involvement in this atrocity. You are either mistaken or lying. The most recent Scripps Howard survey shows that 36% (not even half-way between 25% and 50%) of Americans believe the US government was either “very likely” or “somewhat likely” involved.
Do you believe the US government was involved? Are you implicating all 435 Members of Congress, all 100 Senators, and every member of the President’s Office? Or just the Bushies?
I’m no fan of the Bush administration, but I cannot believe that they attempted to murder upwards of 20,000, and did murder almost 3,000 of their fellow citizens. For what purpose? To justify a war? If that is so, why didn’t Mr. Bush authorize the planting of WMDs in Iraq? That certainly would’ve silenced many of his critics.
So how, exactly, was the US government involved? The notion that explosives were used to demolish those buildings is absurd. It sure didn’t work in 1993. At 133.8 meters (439 feet), the J. L. Hudson building in Detroit is the world record holder of being the tallest structural steel building ever imploded by controlled demolition, on 24 October 1998. It took a 12 person crew 24 days to place the 1,240 kgs (2,728 lbs) of explosives, run over 11,000 meters (36,000 feet, or almost seven miles) of detonation cord, and torch-cut most of the building’s steel beams. This is after a 21 person crew took three months to investigate the building and prepare the implosion design. WTC towers One and Two were 3.1 times taller than the Hudson building, and tower Seven was 1.46 times taller. How big would the crews have to have been to rig these three buildings? How long would it have taken? Remember, those buildings were open basically 24 hours a day, seven days a week. Did no one who worked there ever notice the fresh drywall and wet paint that would have been necessary to conceal those explosives?
Again, who in the US government was involved, and how, exactly?

And edited to meet the 300 word limit:

Reading Mr. Bxxxxx’s letter I agree the World Trade Center towers were not destroyed by isolated kerosene fires. Both towers were struck by 150 ton jumbo-jets traveling at 714 kph and 874 kph. This explains the presence of aviation-grade kerosene, or, jet fuel. Call me naïve, but when I witness two 300,000 pound planes strike two buildings, and those buildings collapse, it’s likely because of the planes. The physicists, mathematicians, metallurgists, structural, mechanical, civil and chemical engineers who’ve studied this agree.
He states almost half of Americans believe in US government involvement in this atrocity. He’s mistaken. The most recent Scripps-Howard survey shows 36% of Americans believe the US government was either “very likely” or “somewhat likely” involved.
How was the government involved, exactly? I’m no fan of George Bush, but I can’t believe he attempted to murder 20,000 US citizens and did murder almost 3,000.
To think explosives were used is absurd. It sure didn’t work in 1993. At 133.8 meters, Detroit‘s Hudson building holds the world record for tallest structural steel building ever imploded. After a 21 person crew took three months to investigate and another four to prepare the implosion design, a 12 person crew took 24 days to place 1,240 kgs of explosives in 4,118 separate charges, lay over 11,000 meters (seven miles) of detonation cord, and torch-cut the building’s steel beams. WTC One and Two were 3.1 times taller than the Hudson; tower Seven was 1.46 times taller. When the exterior walls were looked at in cross-section, two-thirds of the surface area was outside of the buildings, precluding access. How big were the crews that rigged those buildings? How long did it take? Those buildings were open 24/7. Did no one who worked there notice the fresh drywall and paint used to conceal the explosives?
 

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