The turn coordinator in a helicopter is used to indicate:

The turn coordinator in a helicopter is used to indicate:

• A. Roll rate
• B. Yaw rate
• C. Pitch rate
• D. Heading

Answer: (B)

The main idea is that a turn coordinator shows how fast the helicopter is turning around the vertical axis—that is, the yaw rate. The gyro is mounted at a tilt so it responds to yaw and, to some extent, roll, but the information you rely on from this instrument is the rate at which your heading is changing as you turn left or right. It helps you judge how quickly you’re changing direction and ensures you fly coordinated turns. It does not give you a direct reading of pitch rate or your current heading; those come from other instruments.

The main idea is that a turn coordinator shows how fast the helicopter is turning around the vertical axis—that is, the yaw rate. The gyro is mounted at a tilt so it responds to yaw and, to some extent, roll, but the information you rely on from this instrument is the rate at which your heading is changing as you turn left or right. It helps you judge how quickly you’re changing direction and ensures you fly coordinated turns. It does not give you a direct reading of pitch rate or your current heading; those come from other instruments.