When the alula feathers stall at high angles of attack, which aerodynamic consequence occurs?

💡 Explanation

As angle increases, the alula's slot effect creates a small vortex, implementing boundary layer energization of main wing, because adding energy delays stall. Therefore stall postponement occurs, rather than increased lift directly, because turbulence near leading edge changes, because stall occurs near wing tip when stall is unhindered.

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