Early on, pilots are taught that safety of flight depends on, among other things, a consistent flow of air across the airfoil and a positive angle of attack to produce lift. AOA is the angular difference between the wing’s chord line and the relative wind. Increase back pressure on the controls and lift increases, up to a point. Too steep an angle of attack, and that sweet lift-generating airflow goes haywire. Reduce the angle of attack, and the wing will fly once again. So vital is your awareness of the aircraft’s AOA at all times, the Wright brothers’ first airplane included a rudimentary AOA indicator built from a piece of wood and a length of yarn. So if the physics behind this are simple, why do these loss-of-control accidents occur?
Angle of Attack Guidance in the Panel
Key Takeaways:
- Loss-of-control accidents are frequent in general aviation, partly due to pilots relying on airspeed as an inadequate proxy for Angle of Attack (AOA), which doesn't account for varying flight conditions.
- AOA indicators provide precise, real-time awareness of stall margin regardless of aircraft weight, configuration, or bank angle, significantly improving safety over traditional methods.
- Despite FAA support and simplified installation through NORSEE, AOA indicators are not widespread in GA due to their absence in most small planes and pilot training that historically emphasizes airspeed, leading to unfamiliarity and resistance.
- Widespread adoption requires a shift in pilot training to integrate AOA use, increased demand from pilots, and broader inclusion by aircraft manufacturers and training organizations.
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