mm43
@ OK465
It would seem that the major differences in ALT Laws are:-
ALT1:
Pitch attitude (Θ) protection lost.
Hi Speed and Stall speed are alternate.
ALT1A:
As ALT1 but Stall protection is lost.
ALT2:
As ALT1 but lateral normal law is lost and replaced by
lateral alternate (Roll = DIRECT; Yaw = Alternate)
ALT2A:
As ALT2 (Stall protection is lost)
ALT2B:
Pitch attitude (Θ) protection lost.
Hi Speed and Stall protection lost.
Bank angle protection lost
Source - A33Zab in AF447 Thread No.6, and in
ALT2B no Hi and Lo speed stability (= VMO2/ Vc prot),
as explained earlier in this thread.
Thanks for reposting this list.
When BEA and others like Clandestino state, that other UAS events had a positive outcome, can the difference to AF447 partially be found in this list? BEA does not state in which kind of Alternate Law the other events ended, i couldnīt find it at least. So all those events could be just in simple ALT 1, quite a difference to the ALT2B AF447 dropped to.