On Thursday, April 14, 2016 at 7:05:36 AM UTC-4, Bruce Hoult wrote:

Stable slips or skids and dihedral don't make any difference to this.

I was thinking that in a slip/skid, the direction of the relative wind across the airfoil changes (more diagonal flow), and the effective cross-section of the airfoil (shape) changes, and that this might raise or lower the AOA (or both raise and lower at different points along the wing). I was thinking that this may cause a discrepancy between what the AOA sensor is measuring and what the wing was actually experiencing. Maybe not a significant error, since AOA is a warning device.

Also of concern would be how slip/skid affects the AOA sensor itself.

I've seen more than one Youtube video where the stall horn is blaring for the entire final approach, and the pilot is either deliberately or erroneously ignoring it.

Is an AOA indicator (at below critical AOA) useful for optimizing powered flight, minimizing fuel consumption, maximizing rate of climb?