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Exploring the Intricacies of the Airspeed Indicator

Pilot's Life Blog

Aircraft contain all kinds of wonderous indicators and instruments to measure velocity, altitude, weather conditions, etc. However, the single most important aircraft instrument is probably the airspeed indicator. Moving air from outside feeds into the pitot tubes and fills a pressure diaphragm.

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The Classic Boeing Airspeed Indicator

AeroSavvy

Location of the Honeywell SI-800 airspeed indicator on a 757/767 panel Inputs All airspeed indicators need two air inputs. Ram air from a pitot tube and static (undisturbed) outside air from a static port, usually a hole on the side of the fuselage. Pilots set the bugs before takeoff and prior to landing.