Parametric whirl flutter study using different modelling approaches

Abstract This paper demonstrates the importance of assessing whirl flutter stability propeller configurations with a detailed aeroelastic model instead local pylon models. Especially growing use electric motors for propulsion in air taxis and commuter aircraft becomes an important mode instability. These often include which are powered by lightweight located at remote locations, e.g. wing tip. gives rise to instability called flutter, involving gyroscopic modes engine. The driving parameters this dynamics mounting structure. Using generic tip lifting surface, parameter studies on carried out. consists dynamic MSC.Nastran beam coupled unsteady ZAERO ZONA6 aerodynamic strip theory aerodynamics. focus influence different substructures (ranging from engine mount stiffness global dynamics) propeller. results show strong level detail behaviour. coupling surface is major importance, as it can stabilise mode. Including aerodynamics into analysis also change stresses including level.