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Originally Posted by Looger
yep, straight out of my ass.
http://www.9-11commission.gov/report/911Report_Ch1.pdf
The hijackers attacked at 9:28. While traveling 35,000 feet above eastern
Ohio, United 93 suddenly dropped 700 feet.
also:
At 9:32, a hijacker, probably Jarrah, made or attempted to make the following announcement to the passengers of Flight 93:“Ladies and Gentlemen:Here the captain, please sit down keep remaining sitting.We have a bomb on board. So, sit.” The flight data recorder (also recovered) indicates that Jarrah then instructed the plane’s autopilot to turn the aircraft around and head east. 75
The cockpit voice recorder data indicate that a woman, most likely a flight
attendant,was being held captive in the cockpit. She struggled with one of the hijackers who killed or otherwise silenced her.
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Shortly thereafter, the passengers and flight crew began a series of calls from GTE airphones and cellular phones.
also:
9:41 Transponder is turned off
so, how much altitude can a plane drop in 4 minutes, well admittedly, quite a bit. but don't cell phones have to be below 10,000 feet to work reliably? i guess it comes down to how far off the ground 93 went in those 4 minutes, i'm honestly not sure how much altitude it had when the transponder was lost.
from your own link,
http://www.consumeraffairs.com/news0...cell_air2.html
Who would want airline passengers to be able to make cell phone calls at 30,000 feet? Another federal agency, the Federal Communications Commission, seems to be the leading backer of the idea.
seems like a lot of research is being done to make cells work at higher altitudes, why bother when dozens of calls worked with networks seven years older?
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Cell phones are used at 30,000 feet every day, including then.
Obviously passengers aren't supposed to use their cells, but pilots and airlines are well aware that it happens . . . . hence the debate with real pilots contributing in that CNN link I provided you.
Maybe you should take that poll at the CNN link . . . . . seven per cent say yes, that they've used their cell phone in flight.
After all, 30,000 feet is less than six miles - 10 kilometres - from multiple towers in a saturated area with clear line of sight.
Lastly, a recent Carnegie Mellon Institute survey found that cell phone companies log an average 1-4 calls per commercial airline flight in the northeast USA every day.
http://www.cmu.edu/PR/releases06/060228_cellphone.html
Cowperson, above, has some good FAA links on their policy towards cell phones, they clearly do work at lower altitudes reliably.
Where do you get "lower altitudes" from the links I provided?
If they work at "lower altitudes" then clearly the plane itself isn't the issue - only distance from the tower, as would be the case for any call, and the technology to hand off from one tower to the next are the issues.
Its the latter point where you might have a chance. Otherwise you're toast.
The latter is interesting given the speeds being travelled are obviously a lot faster than your car. My understanding is a cell call from a plane uses more resources than a normal call on the part of the cell company in terms of handing off to other towers.
Here's a company marketing ways to block cell phone calls. Its given up on the airline market because of the impact of the 9/11 calls. Obviously they would be very tech savvy and know a bull**** story if they saw one:
http://www.cell-block-r.com/MSegments.htm
i assume that it's possible that cell phones can interfere with flight controls, which is why the FAA has been leary of their use in the past.
The primary issue appears to be interference with navigation equipment.
Cowperson