Unit 2 : Helicopter Aerodynamics

  1. Momentum Theory for Hovering

  2. Momentum Theory for Climbing Flight

  3. Figure of Merit


  1. Blade Element Theory

  2. Expression for Induced Velocity

  3. Tip Losses

  4. Performance of Ideally Twisted Constant Chord Blade

  1. Vortex Representation of the Rotor and Its Wake

  2. Actuator Disk Vortex Theory

  3. Wake Structure for Optimum Rotor

  1. Flow States of the Rotor

    • Normal Working State

    • Vortex-Ring State

    • Turbulent Wake Stater

    • Windmill Brake State

  2. Vertical Descent Performance

  3. Autorotation

  1. Compressibility Effects

  2. Ground Effect in Hover

  3. Ground Effect in Forward Flight