Three questions RE your post #1120 explaining the BUSS scale:
3. At the bottom of your post you write:
but the AOA limit (in Alternate and Direct Law) is a function of MACH, ...
Does the BUSS take Mach effect into account?
I've to revise that one, with the - AOA limit - I meant to say AOAsw (stall warning)
and for your information, I found today, switching to the BUSS comes with a backup stall warning too.
based on Flap/Slat configuration only and
NOT MACH.
Seems to be logical since you switched of all AIR DATA.
With S/F retracted the AOAsw is 8.6
° while in CONFIG FULL it will be 13.6°.
The FCOM:
The backup speed scale is based upon AOA and depends on the Flap/Slat configuration.
1// The RED FAST area: Indicates the excessive speed range.
2// The AMBER 'fast' area: is representing excessive speed range
while keeping an appropiate margin to the maxium structual speeds.
3// The GREEN area indicates the safe speed range.
4// The GREEN Target symbol: This symbol indicates the optimum target speed.
5// The YELLOW line: This fixed reference line, next to a yellow triangle, indicates the aircraft's current speed.
6// The AMBER 'slow' area: indicates too low speed while keeping a appropiate margin to the stall speed.
7// The RED SLOW area: indicates the speeds that are lower than the stall speed.
I did send you some detailed information for your valuable graphs.