Instrumentationeasy#414
The heading indicator (directional gyro) uses a gyroscope with its spin axis:
A
Vertical
B
Horizontal, aligned with the desired heading direction
CorrectC
Aligned with the earth's rotational axis
D
Perpendicular to the wings
Explanation
The directional gyro spin axis is horizontal, set to align with the magnetic compass heading for stable directional reference.
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