The vortex ring state (VRS) is a dangerous aerodynamic condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor, causing severe loss of lift.

One of the most dangerous situations a helicopter pilot can get into is called Vortex Ring State. Learn what it is, how to prevent and how to get out of it.

Air vortices can form around the main rotor of a helicopter, causing a dangerous condition known as vortex ring state (VRS) or "settling with power". In this condition, air that moves down through the rotor turns outward, then up, inward, and then down through the rotor again.

What is a Vortex Ring? Vortex Ring, (a flight condition also sometimes called ‘settling with power’ or ‘power settling’) is a flight condition in which a helicopter that is receiving power from its engine (s) loses main rotor lift and subsequently experiences loss of control.

2023年7月30日 · Vortex Ring State (VRS) is a critical aerodynamic phenomenon that can occur during helicopters’ descent. It is a dangerous condition characterized by a significant loss of lift and control, leading to a potential loss of aircraft stability.

Vortex ring state (formerly referenced as settling-with-power) describes an aerodynamic condition in which a helicopter may be in a vertical descent with 20 percent up to maximum power applied, and little or no climb performance.

2019年7月1日 · Vortex ring state, or settling with power, is like punching the down elevator button for a helicopter. When a helicopter descends too fast in its own downwash, the rotor blades become less effective, and a rapid descent begins. If too close to …

2023年7月27日 · Vortex ring state is an especially dangerous condition for a helicopter because it typically happens close to the ground, especially in downwind approaches.

2017年11月22日 · What is Vortex Ring State? Vortex ring state is a dangerous condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor causing severe loss of lift. Essentially, the helicopter starts descending into its own downwash.

2021年9月26日 · Vortex Ring State (VRS) is one of the most hazardous conditions a helicopter pilot can be in. While it’s part of all the helicopter pilot training syllabuses in the world, it is still present in (fatal) accident reports and discussed widely in the helicopter industry.