PPRuNe Forums - View Single Post - United Flight 93, What actually happened ? [somewhat edited by JT]
Old 10th Aug 2006, 20:35
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nugpot
 
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Originally Posted by SUPERMNNN
Assuming that you don't know anything about Flight 93, assuming you want to land on that airport with a 757, how do you approach the run way? What is your flight path? Given that you are at 7000 ft altitude above New Baltimore? (see #48)

Additional question:
1. For a normal landing, where 6400 ft and 5800 ft should be in altitude, assuming the ground is leveled?
2. What's the time difference between these two points?
First a question of my own. The altitude given by the transponder would probably be on standard setting. In other words it would be height above mean sea level. What is the elevation of the crash site/airport that you talk about? In other words, what was the aircraft's true height above ground?

Now to your questions. An average glidepath angle would be 3 degrees. You can compute the rest of your answers from that.

An airliner configured for landing, should be doing in the region of 120-140 kts, which would be just more than 2 nautical miles per minute at a rate of descent of approximately 700-800 feet/min. So your 600 foot difference would be just under a minute and approximately 2 miles apart, but this supposes a fully configured aircraft flown at normal approach speeds. There are way to many assumptions here for my liking.
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