Indicated Airspeed Pitot Tube Thrust 
AeroSavvy
OCTOBER 26, 2020
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.
Air Facts
MAY 5, 2025
This particular 172 normally cruised at 120 mph indicated airspeed, but with the ice it would barely do 90 mph and that required full throttle! It was also destroying the propellers air foils causing a loss of thrust. This would mean our actual indicated airspeed would have been much higher that what we saw on the gauge.
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