the airspeed when that plane crashed was 250kts or less.
planes flying at less than 10k feet are required to slow to 250kts or less. that rule goes until the planes reach 3000 feet, when planes are usually going 200 kts or less.
but as you can see there's a big tower of smoke.
now, let's pretend like fuel that's been ignited doesn't get put out that easily.
http://www.cbc.ca/canada/calgary/story/2008/07/09/balzac-truck-fire.html
that's a overturned truck, with gasoline and diesel.
when you read the link it says
It took crews two hours to bring the fire under control.
2 hours to put out the flames of 10k liters of gasoline. a 737-800 can carry around 26,000 liters of gasoline. i'm not familiar with what plane flight 93 was, but a 737-800 is usually reserved for regional flights within the US, so it's a good comparison point, it's also one of the newer models of the plane, and the largest in the 737 family. i just used the 737-800 cuz its the one i'm most familiar with...
so it should've taken fire crews around 2 hours to bring it under control, and a bit longer to actually put it out. yet when news crews showed up there was no fire. no waterlines around the floor, no firemen working their assess off to pick up the mess, and the crater wasn't full of water. i've seen firemen going at it with a small car fire, and they used at least 10,000 gallons of water, not all of it evaporates, some of it runs off, and in the middle of a field, i would expect one muddy mess....
but yeah, i'm probably just over thinking it...
