Vortex ring state (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Vortex ring state" in English language version.

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faa.gov

  • Helicopter Flying Handbook, FAA-H-8083-21A (PDF). U.S. Dept. of Transportation, FAA, Flight Standards Service. 2012. pp. 11-8–11-12, 11-17–11-20.
  • "Helicopter Emergencies and Hazards" (PDF). Federal Aviation Administration (FAA). Retrieved 16 April 2023. Vortex ring state (formerly referenced as settling-with- power) describes an aerodynamic condition in which a helicopter may be in a vertical descent with between 20 and 100 percent power applied, and little or no climb performance. The previously used term settling-with-power came from the fact that the helicopter keeps settling even though full engine power is applied.
  • Federal Aviation Administration (December 2019), "11: Helicopter Emergencies and Hazards" (PDF), Helicopter Flying Handbook, United States, p. 9, ISBN 978-1-61954-992-0{{citation}}: CS1 maint: location missing publisher (link)

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