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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 bank by changing wing Angle of Attack (AoA) and lift, but their deflection also creates adverse yaw due to differential drag, necessitating rudder input for coordinated flight.
  • Rudder is critical for countering adverse yaw and maintaining coordination, particularly at high AoA where aileron use for bank correction can inadvertently lead to a stall or spin.
  • Properly coordinated turns require simultaneous application of rudder, ailerons, and elevator (often in the "RAE" sequence) to manage bank, counteract yaw, and maintain altitude, while improper use can cause hazardous slips or skids.
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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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