This paper presents results of a flight-test experiment of a UH-1H helicopter encountering the vortex wake of a C-54 airplane. The helicopter was instrumented to record the pilot control inputs, determine the upset experience, and measure critical loads within the rotor system. During the flight-test program 132 penetrations of the vortex wake were made by the helicopter at separation distances from 3/8 to 6-1/2 nautical miles. Test results indicated that the helicopter upsets and the vortex induced blade loads experienced were minimal and well within safe limits. The upsets were very mild when compared to a typical response of a small airplane to the vortex wake of the C-54 airplane.
Flight-test experience of a helicopter encountering an airplane trailing vortex
Annual National Forum of the American Helicopter Society ; 1976 ; Washington, DC
1976-01-01
Miscellaneous
No indication
English
Gust experience of helicopter and airplane in formation flight
Engineering Index Backfile | 1954
|Helicopter Response to an Airplanes Trailing Vortex
AIAA | 1977
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