Abstract: The technical programme and measurement system of experimental investigation of unsteady dynamic characteristics are introduced. The unsteady lift characteristics of a delta wing with leading edge sweep angle 60° are investigated, when the wing is rapidly pitching up at incidence from 0° until 90°. The experimental results show that the maximum lift coefficient C y max and stall incidence are increased with increased pitch up rate, when the wing is rapidly pitching up. The influences of reduced frequency, average incidence, the oscillating amplitude and pitch axis location on the unsteady instantaneous force produced by oscillating wings are investigated too.

Key words: wings, oscillations, unsteady flow, dynamic characteristics