As an aside, is there a condition of flight that will allow the plane to stall without the stall warner going off? For example, a skidding turn so that the airflow over the stall warner is disrupted?
That's a very interesting question, and one I hadn't thought about before. Most of the aeroplanes/gliders I have flown do not have stall warners anyway, but ....
I would hazard a guess and say that in a skidding turn where the stall warner equipped wing (there's usually only one) is on the outside of the turn, it would be quite possible that the inside wing could stall before the warner (on the outside wing) reaches it's trigger AoA.
Whilst on the subject of slipping turns: I fly a cessna 172, and if high on finals for any reason, often use crossed controls to lose excess height. (Please note that I don't do this in the turn onto finals, but when the wings are level). I find this effective, but again, is there any danger of spinning?
There's always a danger, but it is actually not "that" easy to spin from a slipping turn as the yaw is away from the spin. That said don't try to check this out low down
SS