ATPL Principles of Flight and Aerodynamics 2

Question 1

Positive static stability in an aircraft means that after a disturbance, the aircraft will:

Accepted Answer

Initially develop restoring forces toward the original attitude

Answer

A statically stable aircraft generates restoring forces that initially move it back toward its trimmed equilibrium position after a disturbance from that position.

Question 2

Dutch roll is a lateral-directional oscillation that involves coupling of:

Accepted Answer

Roll and yaw axes

Answer

Dutch roll is a coupled rolling and yawing oscillation that is common in swept-wing aircraft with low directional stability relative to lateral stability.

Question 3

Wing dihedral angle primarily provides stability about the:

Accepted Answer

Longitudinal axis (lateral/roll stability)

Answer

Dihedral creates a restoring rolling moment when the aircraft sideslips, since the lower wing develops more lift, providing positive lateral stability.

Question 4

Adverse yaw in conventional aircraft is caused by:

Accepted Answer

Differential aileron drag during a roll input

Answer

The downward (lift-producing) aileron creates more drag than the upward aileron, yawing the nose toward the rising wing and opposing the intended turn direction.

Question 5

The primary purpose of a yaw damper in a modern transport jet is to:

Accepted Answer

Automatically damp Dutch roll oscillations with small rudder inputs

Answer

Yaw dampers sense yaw rate via gyroscopes and apply small automatic rudder corrections to suppress Dutch roll oscillations inherent in swept-wing jets.

ATPL - Airline Transport Pilot License Practice Test

ATPL - Airline Transport Pilot License Practice Test

ATPL Principles of Flight and Aerodynamics 2