The effects of stochastic atmospheric disturbances on the performance of various helicopter rotor systems was investigated in order to determine their gust sensitivity. A statistical description of turbulent excitations which permits sufficiently accurate simulation of helicopter oscillatory behavior resulting from gust disturbances was developed. Results show that during low altitude flight and slow speed flight the gust vector distribution over the helicopter is very nonuniform. At any instant therefore, the individual rotor blades are affected by very different gust velocities which leads to different responses of the blades. In conclusion, the investigations pursue the important objective of elaborating and clarifying possibilities for improvement of the flight characteristics of the investigated rotor systems, in so far as the inclusion of special gust reduction systems on helicopters is possible and profitable.
Investigation of the Oscillatory and Flight Behavior of Rotor Systems in Relation with Atmospheric Turbulence Untersuchungen Zum Schwingungs- und Flugverhalten von Hubschraubern Unter Atmosphaerischer Turbulenz
1979
72 pages
Report
Keine Angabe
Englisch