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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.

October 18, 2021. Check out our new helicopter autorotation calculator.

October 3, 2021. Check out our new helicopter hover power calculator.

September 27, 2021. Check out our new coordinated turn calculator.

September 22, 2021. Check out our new momentum theory calculator.


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

Wind Turbines

Wind Turbine Airfoil Design

Wind Turbine Components

Wind Turbine Startup Process

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