Directional Stability Flashcards
1
Q
What is directional stability?
A
it is the stability around the VERTICAL or NORMAL AXIS
2
Q
the most important features that affects directional stability are..
A
vertical tail surface (fin and rudder)
keel effect and sweepback also contribute to directional stability
3
Q
How does the vertical tail help?
A
If the airplane yaws from its course the airflow strikes the vertical tail surface from the side and pushes it back to its original flight
4
Q
What must be done for the tail surface to function properly?
A
the side area of the plane close to the centre of gravity must be GREATER than the side area of the airplane forward of the C.G
