Originally Posted by CONF iture
I understand Vs1g = 1.06 Vs but I'm not sure about VɑMax = Vs1g ?
Would you have the reference ?
What I get from the FCOM is VɑCLMax = Vs1g
Apologies - I quoted incorrectly from memory from the A330 FCOM which actually says in 3.04.10: "The FCOM uses VS for VS1g".
However, the explanation preceding that statement makes it quite clear IMHO that VɑMax is identical to VS1g:
Because the A330 has a low-speed protection feature (alpha limit) that the flight crew cannot override, the airworthiness authorities have reconsidered the definition of stall speed for this aircraft.
All the operating speeds must be referenced to a speed that can be demonstrated by flight test. This speed is designated VS1g.
Certification flight tests to determine the reference stall speed are conducted with all airplane systems functioning as designed, i.e. in normal law. VɑMax is the minimum speed that can be demonstrated by flight test in normal law for A320 and A330.