Knot Operating Limitations Turbulence 
AV Web
JULY 23, 2025
The single biggest change is the increase in the maximum stall speed for airplanes a Sport Pilot can operate. 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 ).
Pilot Institute
JANUARY 15, 2025
V-speeds can be defined using any type of airspeed, such as knots or miles per hour, but the designation remains V unless a Mach number is used then it becomes M. VLO Maximum landing gear operating speed. VMO Maximum operating limit speed. In the Cessna 172, you can fly with 10 degrees of flaps below 110 knots.
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