True Airspeed Indicator, 3 1/8" 0-180 mph/ 155 knots, TSO

United Instruments True Airspeed Indicator measures differential pressure developed between the pitot tube and static pressure system. Indicated airspeed is displayed on the outer scale in MPH and on the inner scale in Knots. Manually rotatable outer dial is set to correlate outside air temperature with altitude to provide true airspeed reading in dial cutout. Setting knob is at 5 o'clock position. 3-1/8" instrument round mount with 1/8-27 ANPT rear pitot and static ports. United Airspeed indicators are available in a variety of ranges up to 300 mph. Specify range when ordering. Meets FAA TSO C2b.