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All About Ailerons

Last month in this space we tackled “Proper Rudder Use,” pointing out that in many situations involving angles of attack (AoA) at or near the stall, rudder and not aileron should be the control used to maintain both heading and a wings-level attitude. We also explored how rudder is used to compensate for adverse yaw, and presented a simple exercise pilots can use to demonstrate both its proper and improper application.

Gemini Sparkle

Key Takeaways:

  • Ailerons control an aircraft's roll by changing wing angle of attack but generate adverse yaw due to differential drag, requiring coordinated rudder input to maintain heading and prevent slips or skids.
  • At high angles of attack near a stall, using ailerons to correct a drooping wing can dangerously increase that wing's angle of attack, potentially leading to a stall or spin; rudder should be used in this scenario to maintain wings level.
  • For most aircraft, initiating a coordinated turn involves a specific sequence of control inputs: rudder first, then ailerons to establish bank, followed by elevator to maintain altitude, commonly remembered as RAE.
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Last month in this space we tackled “Proper Rudder Use,” pointing out that in many situations involving angles of attack (AoA) at or near the stall, rudder and not aileron should be the control used to maintain both heading and a wings-level attitude. We also explored how rudder is used to compensate for adverse yaw, and presented a simple exercise pilots can use to demonstrate both its proper and improper application.

Of course, any complete discussion of how to use an airplane’s rudder must also include ailerons and the how and why of their workings, how they create adverse yaw and how we use rudder to maintain coordinated flight. Finally, we want to address an age-old question: Which to apply first when rolling into a banked turn: Rudder? Aileron? Both? Why?

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