Originally Posted by
CaptainSandL
1. If it slows down sufficiently will it actually stall or simply sink; or are they the same thing?
If the wings are rigidly attached to the body, then for them to reach the AoA for a stall in level flight would presumably require the entire aircraft to be pitched up correspondingly.
Otherwise, as it slows down, it simply stops flying and becomes an aerostat, albeit a heavier-than-air one, with only the downward thrust from the vectored fans to (partially) offset the negative buoyancy.