Advance Ratio Calculator

Advance Ratio (J):

Freestream Velocity (v_0):

Propeller rotational speed (n):

Diameter of the propeller (D):

How This Is Calculated

$$ J = \frac{v_0}{nD} $$ where:

J = Advance Ratio (Dimensionless)

v_0 = Freestream Velocity (m/s)

n = Propeller rotational speed (rev/s)

D = Diameter of the propeller (m)

Equation Assumptions

The system is in steady state.
Fluid is incompressible.
The flow is at the propeller disk is uniform.
The fluid behaves as an ideal gas.
There are no propeller interaction effects.

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Power Coefficient

Thrust Coefficient