Natural frequency in helicopters (Aeroelasticity & structural vibrations)
Friday, April 21st, 2006Here’s a video (Chinook Ground Resonance Test) that shows a chopper getting torn apart from a slow and steady spin. This occurs because the natural frequency of the blades and the frequency of the internal vibrations (engine, rpm of blades) coincide causing the stresses to amplify by huge amounts. There is nothing wrong [...]