Welcome

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.

Helicopters

Flight Test Data: Estimating Frequency and Damping

Helicopter Abbreviations and Symbols

Helicopter Components

• Avionics
• Helicopter Engines
• Helicopter Landing Gear
• Helicopter Main Rotor Swashplate

Helicopter Flight, Control and Stability

• Collective Rigging for Autorotation
• Coordinated Turns
• Helicopter Autorotation
• Helicopter Climbs
• Helicopter Control Forces
• Helicopter Controls
• Helicopter Forward Flight
• Helicopter Ground Resonance
• Helicopter Lateral Flight
• Helicopter Off-Axis Control Responses
• Helicopter Stability

Helicopter Forces and Moments

Helicopter modeling and simulation

• Helicopter Linear Models

Helicopter Performance

Helicopter Rotors

• Helicopter Blade Modes
• Helicopter Flap Dynamics
• Helicopter Main Rotor Design
• Helicopter Tail Rotor Design
• Momentum Theory for a Hovering Helicopter
• Three State Dynamic Wake

Wind Turbines

Wind Turbine Airfoil Design

Wind Turbine Components

Wind Turbine Startup Process