Experimental Investigation Into Whirl Flutter Using W-Wing Aeroelastic Demonstrator in 2024

This paper discusses the recent accomplishments in the testing of the W-WING whirl flutter demonstrator.First, the paper gives a theoretical background on the whirl flutter phenomenon and outlines information about the demonstrator itself, past design and development activities and preparatory experiments including mass and stiffness measurements, modal tests and engine tests.The main focus is paid on the wind tunnel measurements.The wind tunnel test description includes the test equipment and methodology as well as the test result assessment methodology and examples of the results.Finally, the outcome and future activities are outlined.