I'm lost. Ignoring for the moment the fact that I'm just a student so have no idea what I'm talking about, as to (2) I'm with Johnm - wing always stalls at the same angle so entirely possible that IAS could be higher but the wing still stalls in the climb (depending on angle of attack). However, running out of elevator authority at 60kt at all angles of attack doesn't make sense to me if stall in, say, s+l isn't until 50kt....?
LB.