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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.

September 9, 2023. We added calculators for advance ratio and inflow ratio.

July 9, 2023. We are in the process of creating pages describing helicopter malfunctions.

May 28, 2023. We added a page describing prebend in wind turbine rotors.

May 12, 2022. We added a page describing the Ingenuity helicopter on Mars.


Flight Test Data: Estimating Frequency and Damping

Helicopter Abbreviations and Symbols

Helicopter Components

Helicopter Flight, Control and Stability

Helicopter Forces and Moments

Helicopter Malfunctions

Helicopter modeling and simulation

Helicopter Performance

Helicopter Rotors

Other Rotorcraft


Helicopter Models

High Speed VTOL

Ingenuity Mars Helicopter

Personal Air Vehicles

V-22 Controls

Wind Turbines

Direct Drive Wind Turbines

Wind Turbine Airfoil Design

Wind Turbine Components

Wind Turbine Prebend

Wind Turbine Startup Process

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