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The aerodynamic conditions required for flutter vary with the structure's external design and flexibility, but can range from very low velocities to supersonic flows. Large or flexible structures such as pipes, suspension bridges, chimneys and tall buildings are prone to flutter. Designing to avoid flutter is a fundamental requirement for rigid airfoils (fixed wing aircraft and helicopters) as well as for aircraft propellers and gas turbine blades.
Prediction of flutter prior to modern unsteady [[computational fluid dynamics]] was based on empirical testing. As a result many pioneering designs failed due to unforeseen vibrations. The most famous of these was the opening of the original [[Galloping Gertie|Tacoma Narrows Suspension Bridge]] in mid 1940, which failed spectacularly 4 months later during a sustained 67
During the 1950s over 100 incidents were recorded of military or civilian aircraft being lost or damaged due to unforeseen flutter events. While as recently as the 1990s jet engine flutter has grounded military aircraft.
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