A flight investigation has been conducted to study the behavior of three advanced-technology airfoils in the three-dimensional, unsteady-flow environment of the helicopter main rotor. Three sets of instrumented main-rotor blades were flown on an AH-1G helicopter. Each set employed one of three airfoils developed with significantly different design technologies. Data are given on performance, rotor loads, and the measurements of chordwise pressure distribution at 90 percent blade radius. The pressure data are compared with theoretical distributions calculated for two-dimensional, steady flow.
Rotor-airfoil flight investigation - Preliminary results
In: American Helicopter Society, Annual National Forum ; 1978 ; Washington, DC
01.01.1978
Sonstige
Keine Angabe
Englisch
NTIS | 1979
|