Momentum Theory CalculatorDescriptionThis calculator estimates the induced velocity and power consumption of an ideal, hovering helicopter rotor. EquationsThe following equations are used to estimate the induced velocity \( v_i \) and power consumption \( P \) from the input air density \( \rho \), rotor radius \( R \), and thrust \( T \). \[ A = \pi R^2 \] \[ v_i = \sqrt{T / 2\rho A} \] \[ P = T v_i \]For more details including the derivation of these equations see our article on momentum theory. |