Calibrated Airspeed Knot Turbulence 
AV Web
JULY 23, 2025
The old limit was 45 knots calibrated airspeed (CAS) without flaps (V S1 ). The final rule raises this limit to 59 knots CAS (V S1 ). At the heart of these new, more capable LSAs is a fundamental shift in certification: a 61-knot limitation.
Pilot's Life Blog
APRIL 9, 2024
The sensor detects the amount of force from the pitot impact pressure and gives it airspeed indications by converting those values into speed. When properly calibrated, airspeed indicators are a highly accurate means of measuring the actual speed of a modern aircraft.
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