What is the collective term for the fin and rudder and other surfaces aft of the centre of gravity that helps directional stability?
- Empennage and vertical stabiliser.
- Forward fuselage keel area.
- Effective keel surface.
Explanation
The effective keel surface is the collective term for the fin, rudder and other side areas aft of the centre of gravity that provide directional (weathercock) stability. Because most of this area lies behind the CG, a sideslip generates a yawing moment that turns the nose back into the relative airflow.
Jordi asking:
why not empennage?I got really confused with this question.
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