Garmin AOA System Owner's Manual - Page 7

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Garmin AOA System Owner's Manual
OVERVIEW
The Garmin AOA (Angle of Attack) System is designed to improve the pilot' s
awareness of the approximate available remaining lift of the aircraft' s wings. The
system calculates the approximate AOA (acute angle between the wing chord line and
the relative wind) using pitot, AOA, and static air pressure inputs.
When correctly calibrated, the system provides a visual approach AOA reference,
as well as increasing caution and warning annunciations as the AOA approaches the
wing' s maximum coefficient of lift (CLmax).

SYSTEM DESCRIPTION

The Garmin AOA System is comprised of three components; the GI 260 Indicator,
the GAP 26 Probe, and the GSU 25 Air Data Computer. The GAP 26 sends pitot and
AOA air pressure to the GSU 25. The GSU 25 measures the air pressure inputs from
the probe and from an independent static source. The GSU 25 then calculates the AOA
information and sends it to the GI 260. The GI 260 displays the AOA information to
the pilot via ten color-coded LED annunciators. When calibrated correctly (refer to
the AOA System Installation Manual for calibration instructions), the system indicates
AOA during critical phases of flight. The system also provides awareness of AOA
trends toward the target AOA for an approach, as well as visual alerting of critical
AOA. When connected to an audio panel or compatible audio system, the GI 260
issues aural alerts of increasing frequency when the system approaches the critical
angle of attack.
190-01773-00 Rev. A
GI 260
AOA Indicator
Pressure
GAP 26
Air Data Probe
Pressure
Pressure
Pneumatic
AOA System Owner's Manual
GSU 25
Static
Air Data Sensor Unit
AOA
Pitot
RS-232
AOA System
AOA System
AOA
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