Analysis and Recommendation of Separation Requirements for Rotorcraft Operation at Airports and Heliports

Low-speed rotorcraft operations at airports and heliports are investigated to better understand and quantify the potential hazards associated with various types of rotorwash flowfields. Mathematical models for various types of rotor-induced flowfields are developed. These models are utilized in conjunction with hazard analysis models to evaluate the potential for rotorwash-related accidents in various operational scenarios. Correlation with available flight test and laboratory experimental data is provided wherever possible. The result from the analysis effort is a recommendation of separation requirements for rotorcraft operations at airports and heliports. Recommendations are also provided for future research that would aid in the elimination of safety factors used in the development of recommended separation criteria.