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Welcome to Spinning Wing. We aim to provide useful content about helicopters, tiltrotors, and wind turbines—machines with spinning wings. We are in the process of creating new articles. Feel free to let us know if you have any recommendations, comments or questions.

November 15, 2022. We added a discussion of helicopter rotor track and balance.

October 11, 2022. We added a discussion of important airspeeds for helicopters.

September 27, 2022. We added a page describing transverse flow.

September 18, 2022. We added a page describing retreating blade stall.


Flight Test Data: Estimating Frequency and Damping

Helicopter Abbreviations and Symbols

Helicopter Components

Helicopter Flight, Control and Stability

Helicopter Forces and Moments

Helicopter modeling and simulation

Helicopter Performance

Helicopter Rotors

Other Rotorcraft


Helicopter Models

Personal Air Vehicles

V-22 Controls

Wind Turbines

Direct Drive Wind Turbines

Wind Turbine Airfoil Design

Wind Turbine Components

Wind Turbine Startup Process

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