Rotorcraft
Vuichard Ring Vortex Recovery Now FAA Approved
Developed by Claude Vuichard, the rotorcraft procedure to escape potentially perilous ring vortexes in now in the latest FAA Helicopter training handbook.

In the latest update of its Helicopter Flying Handbook the FAA for the first time has included the Vuichard safety technique for vortex ring state recovery, which the agency describes as an aerodynamic condition in which a helicopter could be in a vertical descent with 20-percent-up-to-maximum power applied and little or no climb performance.