**Directional Stability & Control**

**Directional Static Stability**

- What is the effect of the fuselage on the directional stability of an airplane?
- What is the effect of wing dihedral on the directional stability of an airplane?
- What is the effect of wing sweep on the directional stability of an airplane?
- Does it make a difference if the sweep is aft or forward?
- What is the effect of the vertical stabilizer on the directional stability of an airplane?
- What is the effect of a dorsal fin on the directional stability of an airplane?
- What is the effect of a ventral fin on the directional stability of an airplane?
- Describe any propeller effects on the directional stability of an airplane.

**Directional Dynamic Stability**

- Describe damping in yaw.
- Describe directional divergence.
- What is
*adverse aileron yaw*and how can it be avoided? - What causes spiral divergence?
- Describe spiral divergence.
- What causes Dutch roll?
- Describe Dutch roll.