Pilot's Life Blog

APRIL 9, 2024

In short, an airspeed indicator measures the ram pressure and compares it to static pressure to determine how fast a plane is moving. Moving air from outside feeds into the pitot tubes and fills a pressure diaphragm. True airspeed (TAS) is the difference between the indicated airspeed and actual speed.

Pitot Tube 52

Pitot Tube Indicated Airspeed True Airspeed Calibrated Airspeed 52

AeroSavvy

OCTOBER 26, 2020

The Honeywell SI-800 Airspeed/Mach Indicator has been a standard instrument on the Boeing 737, 747, 757, and 767 for decades. Boeing stopped installing the stand-alone indicator in favor of modern, reliable flat panel displays. Digital Data Airspeed The Indicated Airspeed (above 30 knots) is displayed in a digital format.

Pitot Tube 52

Pitot Tube Indicated Airspeed Knot Altimeter 52

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! A few minutes later, we heard the center controller clear a Trans Missouri Airlines commuter plane for the VOR Runway 30 approach to Jefferson City. What had happened?

VOR 52

VOR Weather Approach Runway 52