Helicopter height–velocity diagram (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Helicopter height–velocity diagram" in English language version.

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europa.eu

Helicopter Airmanship Training Leaflet HE2 (PDF). European Helicopter Safety Team. 2011. p. 15. Retrieved 19 October 2020.

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.
Chapter 11: Helicopter Emergencies and Hazards. 6 MB page 11-8. Main page. Rotorcraft Flying Handbook, FAA Manual H-8083-21A. Complete manual, 84 MB, Washington, DC: Flight Standards Service, Federal Aviation Administration, U.S. Dept. of Transportation, 2012.