WHAT IS VORTEX RING STATE? Vortex ring state is an especially dangerous condition for a helicopter because it typically happens close to the ground, especially in downwind approaches. The rapid and uncontrolled descent only takes place when three conditions are met: There is power (obviously), the helicopter is below effective translational lift, and the descent rate is more than 300 feet per minute. Take away any of those and VRS won't happen. AOPA.ORG/FT 31http://www.AOPA.ORG/FT