The rotor wake of a helicopter comprises a system of interconnected vortical structures generated by blade tip circulation. The primary tip vortices dominate the near-field flow, convecting downstream ...

Helicopter wake vortices pose a significant and often underestimated danger to general aviation aircraft, capable of causing severe upsets, loss of control, and even structural damage. Unlike ...

Computational fluid dynamics performed by NASA Ames Research Center illustrates the variation in vortices caused by advancing and retreating rotor blades. Credit: NASA The FAA in the past conducted a ...

A European study into Vortex Ring State (VRS) – one of the helicopter industry’s most pernicious and persistent safety risks – has concluded there are only minor differences between the effectiveness ...

When rotor downwash hits the ground surface, the vortex circulation is outward, upward, around and away from the main rotors in all directions. Credit: U.S. Army Helicopter wake turbulence is more ...