PPRuNe Forums - View Single Post - Using GPS ground speed to resolve Unreliable Airspeed
Old 26th May 2019, 01:48
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itsnotthatbloodyhard
 
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Originally Posted by yanrair
Simple example if AF447 had maintained existing pitch at 3 deg. NU, 70%N1 power (approx) and GS 460 kts (whatever it was at the time of failure) nothing would have happened. Safe flight for the foreseeable future. If GS fell by 30 kts say, then apply thrust back to 460 GS and readjust power to 72% and so on.
If anyone thinks this wouldn’t work perfectly please say why.
Because the thrust required would’ve been more like 95% N1 than 70%, and because any changes in the wind would have you chasing the GS in a way that could be quite detrimental. Still better than what happened, though!
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