Turn coordination is available at or above which speed and in which axis?

Turn coordination is available at or above which speed and in which axis?

• A. 40 KIAS, pitch axis
• B. 60 KIAS, roll axis
• C. 50 KIAS, yaw axis
• D. 70 KIAS, yaw axis

Answer: (C)

Turn coordination in a UH-60S is achieved by balancing the yaw induced by the tail rotor with the bank you establish in the turn, so the helicopter slides or skids as little as possible. To do this effectively, you rely on the pedals to provide the proper yaw input as you roll into the turn with the cyclic. But the ability to use that yaw control reliably depends on airspeed. At around 50 knots indicated airspeed and higher, tail-rotor authority becomes sufficient and the rotor inflow allows the pedals to produce the needed yaw moment without fighting rotor wash chaos. That makes a coordinated turn possible, and the turn-and-slip indicator ball stays centered. So the best match is using the yaw axis (pedals) at or above 50 KIAS. The other options mix the wrong axis or the wrong minimum speed, which doesn’t reflect when yaw control becomes reliably effective for coordination.

Turn coordination in a UH-60S is achieved by balancing the yaw induced by the tail rotor with the bank you establish in the turn, so the helicopter slides or skids as little as possible. To do this effectively, you rely on the pedals to provide the proper yaw input as you roll into the turn with the cyclic. But the ability to use that yaw control reliably depends on airspeed. At around 50 knots indicated airspeed and higher, tail-rotor authority becomes sufficient and the rotor inflow allows the pedals to produce the needed yaw moment without fighting rotor wash chaos. That makes a coordinated turn possible, and the turn-and-slip indicator ball stays centered.

So the best match is using the yaw axis (pedals) at or above 50 KIAS. The other options mix the wrong axis or the wrong minimum speed, which doesn’t reflect when yaw control becomes reliably effective for coordination.