Discussion
A general aviation airplane is in steady and level flight. The airplane is prone to adverse yaw. Which one of the following options best describes the deflections of aileron and rudder to achieve a coordinated right turn?
Answer: B
The deflections are left aileron down, right aileron up, rudder right.
To roll right, the right wing must lose lift and the left wing gain it, so the right aileron goes up and the left aileron goes down. The down-going left aileron increases the left wing's lift and also its induced drag, which yaws the nose to the left, away from the turn: this is adverse yaw.
Right rudder counters it and keeps the turn coordinated (no sideslip). The options with left rudder would add to the adverse yaw, and the options with left aileron up would roll the airplane to the left.
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