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Old 6th Jul 2012, 09:56
  #75 (permalink)  
sensor_validation
 
Join Date: Jul 2009
Location: UK
Posts: 133
Quote:
Is 60 kt really too low cut-out for widebody?

Originally Posted by ECAM_Actions View Post
It would seem not slow enough. :ugh
As discussed at length before it is 60kt 'apparent airspeed' derived from pitot tubes which will all be significantly under-reading at high angle of attack. I'm sure someone can post a calculated trace of actual speed through the air, taking into account vertical and ground speed and estimated wind.

Why 60kt? To read a 10:1 turndown in airspeed in range 30-300 needs a 100:1 turndown on the pressure sensor - so just double the lower value to make sure we can measure it?
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