PPRuNe Forums - View Single Post - AF447 Thread No. 3
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Old 28th May 2011, 21:25
  #459 (permalink)  
gums
 
Join Date: Jun 2009
Location: florida
Age: 81
Posts: 1,610
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Back to some aero for the newbie posters/questioners here

One poster asked if it was possible to get into a stall and not be able to recover.

Answer? Yep.

So see this old post from thread 2 once we got thru all the search procedures, pinger characteristics, FDR construction, etc.

http://www.pprune.org/tech-log/44963...ml#post6432295

It is entirely possible that even full nose down elevator commands in Direct law could not provide a high enough pitch coefficient to break the stall. This could be due to the THS being trimmed almost all the way to a nose up command and the relatively small surface area of the elevators. Until I see a good pitch moment chart as the one I posted for the Viper, I'll reserve further speculation and only say that it is indeed possible.

I also point out the "golden arm" test pilot's description of the "ride" when in a fully developed deep stall. Any resemblance to the AF447 profile from 35,000 feet to impact is purely coincidental, heh heh.

Gums sends...

post seemed to be edited by "janitor" for a crass "You Tube" reference. LOL.

Last edited by gums; 28th May 2011 at 22:01.
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