Transitioning to Alpha Systems AOA
Correlation of angle of attack (AOA) by means of differential pressure was identified by the US Air force in the early 1970’s. Devices made for the General Aviation market utilized those principles since the 1980’s. To create additional display systems (LED bar graph) that could be seen in the pilots’ peripheral vision, DepotStar, Inc. continue to offer improvements, kits and displays that aid the pilot for safer flight.
DepotStar in 2007 re-introduced an upgraded AOA system with new smaller mechanical differential gauges encompassing a new easier/faster to 
scan face, new calibration procedures, better LED bar graph readouts and updated software under the new name of "Alpha Systems AOA".
Since 2007, response and interest in our system has sparked or ignited the "AOA flame". The FAA in the General Aviation (GA) aircraft market has for the past 50 years focused on the use of Airspeed as the primary method for pilots to determine the amount of lift available. In 1920, the Wright Brothers first identified (with a piece of yarn and protractor) that their aircraft would ALWAYS Stall at the same Angle. This term today is known as "Angle of Attack".
The US Military needed to identify and solve the problem of the high number of fatalities in carrier landings. Air speed IS NOT giving the appropriate information, instantaneously, that would assist the pilots in safer approaches, reducing accidents. The military aircraft manufacturers went back to the little known device, they found that a wing, mounted on the nose of the aircraft (now mostly jets) would give them the Angle of Attack (AOA) information, repeatably for the amount of lift for the airfoil design unique for each aircraft. AOA and air speed fed into the "air data computer" together gave the manufacturers a way to develop, up front, either a display, stick shaker, throttle quadrant override, or now days, the computer takes over the flight systems and won't let the pilot get the aircraft in an unusual attitude/AOA that could put the pilot at risk giving him or her real lift available information.
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