Rotor Performance Calculator

Calculator to calculate rotor performance for helicopter, propeller and wind turbine applications. This tool also comes as an executable for download.

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Air Density, ρ_air: Unit:

Rotor RPM, Ω:

Rotor Radius, R: Unit:

Vertical Advance Ratio, λ_C:

Solidary Ratio, σ:

Airfoil Angle of Attack, α_C: Unit:

Number of Rotors, N:

Airfoil Lift Slope, a: Unit:

Airfoil Drag Factor, K:

Airfoil Zero Lift Drag Coefficient, C_D0:

Inflow, λ:

Rotor Pitch, θ: Unit:

Thrust Coefficient, C_T:

Power Coefficient, C_P:

Thrust, T: Unit:

Power, P:

Efficiency:

Helicopter Efficiency:

Rotor Flow State

Advance Ratio

Inflow

Pitch (deg)

Power Coefficient

Efficiency

Hover Efficiency

Vc/vh

v/vh(Normal and Vortex Ring)

v/vh(Windmill Break)

v/vh(Turbulent Wake)

v/vh(Autorotation)

References:

[1] http://www.eiteog.com/EiteogBLOG/No4EiteogBlogThrust.html

[2] http://www.eiteog.com/EiteogBLOG/No11EiteogBlogThrust.html

[3] http://www.eiteog.com/EiteogBLOG/No16EiteogBlogThrust.html

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Disclaimer: Eiteog makes every effort to provide information which is as accurate as possible. Eiteog will not be responsible for any liability, loss or risk incurred as a result of the use and application of information on its website or in its products. None of the information on Eiteog's website or in its products supersedes any information contained in documents or procedures issued by relevant aviation authorities, manufacturers, flight schools or the operators of aircraft, UAVs.