![Energies | Free Full-Text | Comparison of Power Coefficients in Wind Turbines Considering the Tip Speed Ratio and Blade Pitch Angle Energies | Free Full-Text | Comparison of Power Coefficients in Wind Turbines Considering the Tip Speed Ratio and Blade Pitch Angle](https://www.mdpi.com/energies/energies-16-02774/article_deploy/html/images/energies-16-02774-g001.png)
Energies | Free Full-Text | Comparison of Power Coefficients in Wind Turbines Considering the Tip Speed Ratio and Blade Pitch Angle
What would a formula look like for calculating the rotor blade tip speed on a helicopter? I.e. a blade on an R44, or a blade on a micro helicopter that's only 360mm. -
![drag - At what rpm does the tip of a 54" propeller start to incur mach losses? - Aviation Stack Exchange drag - At what rpm does the tip of a 54" propeller start to incur mach losses? - Aviation Stack Exchange](https://i.stack.imgur.com/0cdls.jpg)