The Turn Needle in an aircraft’s Turn and Slip Coordinator instrument provides information about the aircraft’s rate of turn in degrees per second. It typically indicates the rate at which the aircraft is rotating or changing its heading in a horizontal plane.
Here’s the formula and its definition:
- Rate of Turn is the rate at which the aircraft is turning, measured in degrees per second (°/s).
- Horizontal Displacement of Turn Needle is the angular displacement of the turn needle from its centered position.
- Time is the duration over which the displacement occurs, typically measured in seconds.