PPRuNe Forums - View Single Post - AF 447 Thread No. 11
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Old 25th October 2013 | 01:45
  #456 (permalink)  
Machinbird
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Joined: Jul 2009
: ATP+Mil
Posts: 1,587
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From: Not far from a big Lake
Clandestino,
You are being a naughty boy. You are trying to spin this thread up to max RPM by using poorly researched and poorly supported comments.

FYI, the AOA probe on my F-4 would be alive with normal wind over the deck on the ship and was also good for over 750 knots worth of Q. I don't think anyone is going to make serious money re-inventing that item.

AF447 IAS if it could have been accurately read never got below 150 KT after the departure from controlled flight, so I do not understand this fascination with an AOA able to operate at 5 knots. The only way an airborne jet is going to do that is by climbing vertically, and then only briefly, and most guys flying heavy iron know that is a really bad idea. The AOA probes were functioning, but there was no way to present that information to the crew in AF447.

Bloggs is right when he says
Some bright spark thought that aeroplanes couldn't fly below 60KIAS so decided that they'd turn the stall warning off below that. Bad decision. If the aeroplane's in the air and below stall speed/above stall AoA, keep the stall warning on!
Even BEA thought that EASA should review that concept.

Originally Posted by Clandestino
pilots of yesteryear occasionally lost control too.
Sure, several times, but we also knew how to regain control.

Quote:
I think that this was the Captains crucial error. (Well apart from leaving the flight deck at all given the proximity of the Inter Tropical Convergence Zone and the associated radar visible thunderstorms, which were a mere 10 minutes ahead).
Originally Posted by Clandestino
It was done this way millions times before and hundred of thousand times after without any adverse consequence so what is the problem with it?
Well, it seems that someone finally had a problem with it, didn't they?

Quote:
Originally Posted by Machinbird
The aircraft was in roll direct. He apparently he had no prior experience in flying in Alt2b Law in the simulator at altitude and likely, no experience in flying in Direct law at altitude. As a result, his mental model of the aircraft response was out of calibration and his control inputs were well beyond appropriate for roll.

Originally Posted by Clandestino
No they were not. He put roll under control pretty efficiently and way before stall warning went off third and the longest time.
So 30 seconds worth of beating snakes with a side stick is your definition of efficiently gaining control? Wow!
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