Induced Velocity (Momentum Theory) Calculator

Induced Velocity (v_i):

Thrust (T):

Density of fluid (ρ):

Propeller disk area (A):

Freestream Velocity (v₀):

How This Is Calculated

$$ v_i = \frac{T}{2 \rho A v_0} $$ where:

v_i = Induced Velocity (m/s)

T = Thrust (N)

ρ = Density of fluid (kg/m³)

A = Propeller disk area (m²)

v₀ = Freestream Velocity (m/s)

Assumptions

The system is in steady state.
Flow through propeller is purely axial.
The flow is inviscid.
Fluid flow is irrotational.
Propeller blades are thin relative to the span of the propeller.

Related Calculators

Helix Angle

Helical Tip Velocity

Induced Drag

Propeller Efficiency

Torque