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(Popular Mechanics)   In the new movie Flight, the pilot turns his airliner upside down to save it from an uncontrolled descent. Is that really possible? Here comes the aeronautical science   (popularmechanics.com) divider line 5
    More: Interesting, aeronautical science, landing gear, flight controls, catastrophic failure, blood  
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8522 clicks; posted to Geek » on 06 Nov 2012 at 11:02 AM (2 years ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-11-06 02:22:32 PM  
1 votes:
Probably the best real-life account of how well a large aircraft (and pilot) can manuever in extreme circumstances and survive.
http://en.wikipedia.org/wiki/Federal_Express_Flight_705 

/Rolled the plane to stop a guy who was wailing on him with a hammer.
2012-11-06 12:31:08 PM  
1 votes:
No...It's not possible to do what is shown in the movie.

Yes, you can barrel roll and airliner, but it is not a barrel roll shown in the movie. It's an aileron roll. The difference is that in a barrel roll, a constant gravity is maintained, meaning things don't go flying about the cabin even when inverted. A barrel roll doesn't maintain a constant gravity, thus stuff flies about the cabin... as seen in the movie. The barrel roll actually gains altitude, the aileron roll losses altitude. Wings, when not stalled, always produce lift. If you turn them sideways, they produce lift sideways. If you turn them upside down, they produce lift towards the ground. So, rolling a plane upside down would actually make it fall faster unless the nose was pitched radically upwards using the angle of attack alone to produce lift. Commercial airliners do not have enough thrust to overcome gravity, and wing lift with angle of attack alone.

Denzel Washington would have killed his passengers faster, no save them.

Let's not even think about the weird outside aileron roll that would have resulted from trying to perform an aileron roll with the controls in full nose down deflection. 

I want to throw things at the TV ever time I see that crap.
2012-11-06 12:06:19 PM  
1 votes:

farbekrieg: Do the needful: I flew inverted once over Macho Grande.

Over macho grande?


I'll never get over Macho Grande.
2012-11-06 11:49:45 AM  
1 votes:

Do the needful: I flew inverted once over Macho Grande.


Over macho grande?
2012-11-06 11:32:50 AM  
1 votes:

fluffy2097: what?

No.

You pull back on the stick to leave a dive.

If you have stalled, you point the nose at the ground until you have sufficient airspeed to pull back on the stick and return to level flight.

If you're stuck in a flat spin in a commercial airliner, you stick your head between your legs and kiss your ass goodbye.

/really no other options to my knowledge.


In this case, the plane's elevator controls are jammed in the "nose down" position due to a mechanical failure, so rolling the aircraft would be the right thing to do. Assuming you had enough airplane left to initiate the maneuver with by the time you were done with the violent pitch-down.
 
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