¶ Mechanism
The gyro in the attitude indicator is mounted in a horizontal plane and depends upon rigidity in space for its operation. The horizon bar represents the true horizon. This bar is fixed to the gyro and remains in a horizontal plane as the aircraft is pitched or banked about its lateral or longitudinal axis, indicating the attitude of the aircraft relative to the true horizon.
This instrument is used to know about the attitude of the aircraft without any visual reference.
With it, the pilot can know if the aircraft is:
- pitching
- banking
¶ Aspect
The attitude indicator displays a picture of the attitude of the aircraft.
There is also a miniature aircraft (yellow) and horizon bar representation. The horizon is displayed using a white line which separates the instrument in two parts:
- the blue one which represents the sky
- the brown one which represents the earth.
¶ Use
The relationship of the miniature aircraft to the horizon bar is the same as the relationship of the real aircraft to the actual horizon. The instrument gives an instantaneous indication of even the smallest changes in attitude.
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Note that the little orange triangle on the top shows the bank angle with the white graduation.
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