M8.4 Stability

For an aircraft be in to fly straight and steady along a flight path the forces acting on it must be in .....?

• Dynamic equilibrium

• Static equilibrium

• Dynamic balance

• Propulsion equilibrium

What is the behavior of oscillations in neutral dynamic stability?

• They dampen over time

• They continue indefinitely

• They get worse over time

• They stop immediately

What is the significance of the area or size of the tail surfaces?

• It affects the color of the aircraft

• It affects static longitudinal stability

• It determines the speed of the aircraft

• It influences the fuel efficiency

What is the result of a larger frontal area presented by the forward-going wing?

• Greater drag

• Less drag

• Increased speed

• Decreased lift

What is the angle between the sideslip angle and the aircraft centreline called?

• Wind direction

• Normal Angle

• Sideways Angle

• Sideslip Angle

The Keel Effect is a type of which stability?

• Lateral stability

• Longitudinal stability

• Balanced stability

• Rotational stability

What design factors can make an aircraft laterally stable? (Select all that apply)

• Dihedral

• Keel effect

• Sweep-back

• Weight distribution

When does a Dutch roll occur?

• When lateral stability is greater than directional stability

• When the aircraft is on the ground

• When the engines are off

• When the aircraft is at maximum speed

What is a disadvantage of increasing the size of the vertical stabiliser?

• Improved fuel efficiency

• Increased weight and drag

• Enhanced speed

• Reduced stability

What is a side effect of increased stability at high speeds?

• Enhanced maneuverability

• Reduced maneuverability

• Increased fuel consumption

• Decreased lift