Helicopter Aerodynamics

This section will cover Helicopter Aerodynamics. Most of the topics covered apply to all helicopters, but with extra emphasis on the Robinson R22 and R44 helicopters.

Current Content



An airfoil is any surface that produces a useful aerodynamic force. Here are some examples of uses of those aerodynamic forces: Lift Negative Lift Stability Thrust Control When talking about airfoils it is important to know ...
Helicopter Torque

Helicopter Torque

A basic rule of Newtonian physics is that for every action there is an equal and opposite reaction . So when you have the action of the rotation of the main rotor blades of a helicopter - the reaction will cause the body of the helicopter to move in...
Three Axes of Flight

Three Axes of Flight

When maneuvering in the air, the helicopter moves around the Three Axes of Flight which all act through the helicopter's center of gravity (CG): Longitudinal Axis (Roll or Bank) Lateral Axis (Pitch) Vertical Axis (Yaw) Video The...

Future Topics

  • Generation of Lift
  • Types of Drag
  • Translating Tendency/Drift
  • Transitional Lift and ETL
  • Transverse Flow Effect
  • Retreating Blade Stall
  • Settling with Power (SWP) or Vortex Ring State (VRS)
  • Loss of Tail Rotor Effectiveness (LTE)
  • Low G Mast Bumping
  • Autorotations
  • And more…

Relevant Books