Reviewer Lesson No. 10 BALANCING AND RIGING 11-07 LC

What is the purpose of positive static stability in aircraft design?

• A. To improve fuel efficiency
• B. To assist in maintaining dynamic stability
• C. To decrease pilot workload

What axis runs from wingtip to wingtip?

• A. Vertical axis
• B. Longitudinal axis
• C. Lateral axis

Which movement is associated with the longitudinal axis?

• A. Yaw
• B. Roll
• C. Pitch

The vertical axis affects which type of stability?

• A. Directional (Yaw)
• B. Lateral (Roll)
• C. Longitudinal (Pitch)

What does static balance mean for a control surface?

• A. It resists movement during flight
• B. It is stable when rotated
• C. It stays still when supported at its center of gravity

What indicates an underbalance in a control surface?

• A. Trailing edge goes up, minus sign
• B. Trailing edge goes down, plus sign
• C. Trailing edge goes down, minus sign

What describes dynamic balance?

• A. The ability to balance during painting
• B. Static positioning of control surfaces
• C. Balanced forces in a rotating object to minimize vibration

What type of static stability continues to move away from its original position after disturbance?

• A. Neutral static stability
• B. Negative static stability
• C. Positive static stability

If an aircraft pitches up after turbulence and keeps pitching up, it shows:

• A. Neutral static stability
• B. Positive static stability
• C. Negative static stability

What should be done if a control surface gains weight from repair?

• A. Replace the entire surface
• B. Ignore it
• C. Rebalance or check the balance