Can somebody do the quick math how steep an A320 can dive at the maximum speed at which full spoilers are allowed? More or less than the -15° nose down flight path the envelope protection does allow?
from FL390 to FL100 it can descend a with speed brakes at .82/350 in 4 mts in 40miles. Average ROD 7000ft/mt. If you are landing straight then it can be done at 250kt gear down then 280kts. It may take a minute extra.