My question is how precise is the stall warning vane in detecting the stagnation point on the wing? The lift transducer is an LVDT so electrically speaking it is a continuous signal. But when approaching a stall, could the vane be held in between center and full deflection for a few seconds? (The vane is spring loaded to center, not sure of the exact force required to move but feels very light to touch). Or maybe a better question: If the airflow at the stagnation point is 0 (vane center), does the airflow around the stagnation point slowly increase (vane in between center and full deflection) or is it pretty much full speed (vane instantly deflects to full position)? The aircraft is of the 707 variant.