How it Works - (cont.)
The Alpha Systems AOA utilizes a time prove method to detect and sense the AOA by means of a custom designed probe that measures changes of pressure, when mounted in “clean air flow” (undisturbed air), calibrated to the aircraft, giving repeatable, accurate and instantaneous pressures over the aircrafts linear AOA range. These pressures are directly related to the AOA range of available lift, from Cruise up to Stall.
The AOA probe mounting plate comes from the factory at 8” by 8” square which allows the aircraft mechanic to locate an existing inspection cover that meets the clearance, setback, and undisturbed air criteria. Once the location is identified, the mechanic utilizes the inspection cover as a pattern, tracing the shape and mounting hole pattern of the cover to the AOA probe mounting plate. Once the AOA probe mounting plate has been trimmed and fit, the AOA probe / mounting plate replaces the inspection cover and gives a solid mount that holds the probe rigidly to the aircraft.
The Air Data Computer receives the pressures from the AOA probe through two
¼" hoses. These hoses allow the air data computer to sense instantaneously the pressures converting the raw air pressures into an electrical signal. The air data computer also provides power to the display, housing the audio warning beeper, and an I/O interface for a remote beeper or audio interface options.
Alpha S
ystems AOA produces many different displays that can be mounted in the cockpit, to be seen by a pilot in their peripheral vision. Configurations such as the 2.250 standard instrument panel mount , LED round, 4” X 1” vertical or horizontal LED display, the “ULTRA” 2.50” X 1”, 16 LED bar graph and the “LEGACY” chevron, LED driven display system.
Additionally, optional display mounting hardware kits have been designed such as the vertical or horizontal flush swivel dash mount, vertical dash mount bracket kits make it easier to mount the LED display up high in the cockpit or on top of the glare shield.