SIGMA-TEK STANDARD AIRSPEED EA5171

The Sigma Tek Standard Airspeed EA5171 is designed to have unrestrained movements. Equipped with a movable pointer and a fixed dial indicate, the EA5171 also has a zero index at the 12 o’clock position. The EA5171's temperature compensation is internal and has no external zero adjustment, while the pointer damping is internally adjustable. These Airspeeds are actuated by both ram air and an ambient atmospheric pressure obtained from the aircraft pitot and static pressure systems.