Technical Note A Note on Torsional Dynamic Scaling

摘要

The usefulness of Mach-scaled wind tunnel models models to support rotor- craft design is well accepted whether for performance estimation (Refs. 1- 2) or to provide design information for such characteristics as aeroelastic stability, loads, and vibration (Ref. 3). Formidable challenges still remain, however, in designing and testing Mach-scaled must be able to complete a test program without structural failure and dynamic scaling requires that the first five modes, at least, be properly scaled (Ref. 4).