MOD 8.4

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Which type of stability is concerned with the way the restorative forces act with regard to time?

Negative dynamic stability

Dynamic stability (correct)

Positive static stability

Static stability

What type of stability does a ball possess when it tends to roll back down to its original position after being rolled up the side of a valley?

Positive static stability (correct)

Negative static stability

Positive dynamic stability

Neutral static stability

What type of stability does a ball possess when it has no tendency to return to its original position after being released from the top of a slope?

Negative static stability (correct)

Positive static stability

Neutral static stability

Negative dynamic stability

What type of stability does a body possess when the restorative forces that tend to bring it back to its position of equilibrium neither increase nor decrease in amplitude with time?

Neutral dynamic stability Signup and view all the answers

Which axis of an aircraft is also known as the yaw axis?

The Vertical axis Signup and view all the answers

Which axis of an aircraft passes through the centre of gravity and extends parallel to the wing span?

The Lateral axis Signup and view all the answers

What is the control of movement (roll) about the longitudinal axis of an aircraft?

Ailerons Signup and view all the answers

Which axis of an aircraft is a straight line through the fuselage, passing through the centre of gravity?

The Longitudinal axis Signup and view all the answers

Which axis of an aircraft is controlled by the elevators connected to the control column?

Lateral Axis Signup and view all the answers

What is the term for the unwanted yaw in the opposite direction of a roll, caused by the drag of the downward moving aileron on the higher wing in the roll and the additional lift of the wing?

Adverse Yaw Signup and view all the answers

Which method can be used to counteract the adverse yaw in an aircraft?

Applying more rudder input in the same direction as the roll Signup and view all the answers

What is the term for the unwanted roll in the same direction as a yaw, due to the faster outer wing in the turn generating more lift?

Unwanted Roll Signup and view all the answers

Which of the following is true about longitudinal stability in an aircraft?

Longitudinal stability is determined by the center of gravity with respect to the center of lift. Signup and view all the answers

Which statement accurately describes the effect of a downdraft on an aircraft trimmed for a given airspeed?

The nose will drop, the airspeed will increase, and the tail load will increase. Signup and view all the answers

Which factor primarily provides lateral stability in an aircraft?

The dihedral angle of the wings. Signup and view all the answers

What is the purpose of the elevators on the tail plane in an aircraft?

To provide longitudinal stability. Signup and view all the answers

Which of the following statements is true about the directional stability of an aircraft?

The amount of directional stability is directly proportional to the size of the vertical fin and the distance the fin is located aft of the C of G. Signup and view all the answers

What is the purpose of the vertical fin in an aircraft?

To provide stability about the vertical axis. Signup and view all the answers

What is the effect of the corkscrewing slipstream on an aircraft?

It pushes the tail to the right. Signup and view all the answers

What is the cause of the yawing moment in an aircraft following the failure of an engine?

The decrease in thrust and increase in drag on the side with the failed engine. Signup and view all the answers

Which of the following factors primarily affects lateral stability in an aircraft?

Dihedral Signup and view all the answers

What is the purpose of dihedral in an aircraft?

To provide lateral stability Signup and view all the answers

How does sweepback affect the lateral stability of an aircraft?

Increases lateral stability Signup and view all the answers

What is the purpose of the vertical fin in an aircraft?

To provide directional stability Signup and view all the answers

Which of the following factors primarily affects the ability of the pilot to counteract the yawing moment due to asymmetric thrust?

All of the above Signup and view all the answers

Which of the following is true about the minimum control speed (VMC)?

It is the minimum speed at which directional control can be maintained following engine failure Signup and view all the answers

What is the effect of torque on an aircraft?

It causes the aircraft to roll in the opposite direction of the propeller rotation Signup and view all the answers

What is Dutch Roll and Spiral Instability?

A form of dynamic instability that requires an automatic yaw damper for correction Signup and view all the answers

What is the purpose of the vertical fin in an aircraft?

To provide directional stability Signup and view all the answers

What is the term for the tendency of the aircraft to roll in the opposite direction to that in which the propeller is rotating?

Torque Signup and view all the answers

MOD 8.4

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Questions and Answers

Which type of stability is concerned with the way the restorative forces act with regard to time?

What type of stability does a ball possess when it tends to roll back down to its original position after being rolled up the side of a valley?

What type of stability does a ball possess when it has no tendency to return to its original position after being released from the top of a slope?

What type of stability does a body possess when the restorative forces that tend to bring it back to its position of equilibrium neither increase nor decrease in amplitude with time?

Which axis of an aircraft is also known as the yaw axis?

Which axis of an aircraft passes through the centre of gravity and extends parallel to the wing span?

What is the control of movement (roll) about the longitudinal axis of an aircraft?

Which axis of an aircraft is a straight line through the fuselage, passing through the centre of gravity?

Which axis of an aircraft is controlled by the elevators connected to the control column?

What is the term for the unwanted yaw in the opposite direction of a roll, caused by the drag of the downward moving aileron on the higher wing in the roll and the additional lift of the wing?

Which method can be used to counteract the adverse yaw in an aircraft?

What is the term for the unwanted roll in the same direction as a yaw, due to the faster outer wing in the turn generating more lift?

Which of the following is true about longitudinal stability in an aircraft?

Which statement accurately describes the effect of a downdraft on an aircraft trimmed for a given airspeed?

Which factor primarily provides lateral stability in an aircraft?

What is the purpose of the elevators on the tail plane in an aircraft?

Which of the following statements is true about the directional stability of an aircraft?

What is the purpose of the vertical fin in an aircraft?

What is the effect of the corkscrewing slipstream on an aircraft?

What is the cause of the yawing moment in an aircraft following the failure of an engine?

Which of the following factors primarily affects lateral stability in an aircraft?

What is the purpose of dihedral in an aircraft?

How does sweepback affect the lateral stability of an aircraft?

What is the purpose of the vertical fin in an aircraft?

Which of the following factors primarily affects the ability of the pilot to counteract the yawing moment due to asymmetric thrust?

Which of the following is true about the minimum control speed (VMC)?

What is the effect of torque on an aircraft?

What is Dutch Roll and Spiral Instability?

What is the purpose of the vertical fin in an aircraft?

What is the term for the tendency of the aircraft to roll in the opposite direction to that in which the propeller is rotating?

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