Which consequence results when a bird increases airspeed without adjusting wing geometry?

💡 Explanation

When a bird increases airspeed at constant geometry, the effective angle of attack at the wingtips increases due to lift increasing with speed. This elevated angle exceeds the critical angle, causing stall due to flow separation that disrupts lift. Therefore stall risk increases at the tips, rather than lift increasing, or drag decreasing which require optimized matching of airflow.

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