True Airspeed Indicator, 3 1/8" 55-300 mph/ 60-260 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 posit