Quote : "
NAV is therefore NOT an automatic flight mode - it is (as Hand Solo mentioned) an FD function (and therefore provides the "bars" on the PFD for the PF to fly?)"
NO ! As said earlier, the FMGS is comprised of several parts : The FD and the AP share the same modes. When you switch from FD flying to A/P engagement, the A/P takes all the modes that you are using at its engagement.The FD command bars do not change. On the FMA, one line is added over the FD status :
AP1 0r 2 over
1 FD 2 in normal OPS.
Quote :"
"...
is there ever a situation where V2+10 (or the initial climb speed) would be greater than the speed for the selected flaps configuration, so that it would be necessary to clean up earlier in the climb?"...
No. It never does. On the 'BUs (hello, TP !
), the flap selections are shown on the speed tape and give you the margins with the Vfs.