Velocity on a V-n Diagram is typically measured in which unit?

In the context of a V-n diagram, which is used in aerodynamics and flight dynamics to plot the relationship between velocity (V) and load factor (n), the unit of velocity is typically measured in knots-equivalent airspeed. This is because knots are a standard unit of measurement for airspeed in aviation, and equivalent airspeed takes into account various factors, such as air density and compressibility effects, which are critical for performance calculations at different altitudes and air conditions.

Equivalent airspeed provides a more accurate representation of aircraft performance, especially during takeoff, landing, and maneuvers where aerodynamic properties are significantly influenced by air density. Using knots as the unit of measure allows pilots and engineers to communicate and interpret data efficiently, keeping in mind the operational context of aircraft performance.

In contrast, other options like knots-true airspeed and kilometers per hour (KPH) may not provide the necessary adjustments for varying air density, which limits their reliability in a V-n diagram format where precise performance metrics are vital. Therefore, knots-equivalent airspeed is the unit that aligns best with the principles governing the V-n diagram's application in aviation.