🫡🫡🫡 Airspeed Indicator Markings The Airspeed Indicator (ASI) is a vital flight instrument that displays an aircraft’s speed relative to the surrounding air. Its dial is marked with specific colored arcs and lines to help pilots quickly identify safe operating speeds and critical limits during all phases of flight. Key Details Color-Coded Markings: * White Arc: Indicates the flap operating range (lower limit is stall speed with flaps down, upper limit is max flap speed). * Green Arc: Normal op

What is EAS-Equivalent Airspeed? Indicated Airspeed (IAS): The reading on the airspeed indicator, not corrected for instrument error, position error, or altitude. Calibrated Airspeed (CAS): IAS corrected for instrument and position errors. Equivalent Airspeed (EAS): CAS corrected for compressibility effects. It's the speed at which the air passing over the aircraft produces the same dynamic pressure as it would at sea level in the International Standard Atmosphere (ISA). True Airspeed (TAS): The