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Old 18th March 2010 | 15:57
  #531 (permalink)  
HazelNuts39
 
Joined: Jul 2009
Posts: 1,682
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From: France - mostly
CAS and AoA

RE: CONF iture #521
Originally posted by PJ2: for any specific weight there is a direct, corresponding relationship between CAS and AoA regardless of altitude
IMHO that is not exactly true, but maybe good enough for practical purposes below Mmo
regards,
HN39

Example
An A330, 205t, cg as QF72, 235 kt CAS:

@ FL 350; M 0.7; AoA = 5.2 deg
FL 200; M 0.52; AoA = 6.1 deg
sealevel, M 0,36; AoA = 6.5 deg

This assumes that the lift coefficient/AoA relation derived from the QF72 maneuver corrected for Mach-effect per Prandtl-Glauert does not change with Reynolds.

Last edited by HazelNuts39; 1st April 2010 at 22:15. Reason: AoA corrected for Mach with P.-G.
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