AERODYNAMIC PARAMETER ESTIMATION OF THE CG CONTROLLED AIRPLANES

The aim of this work is investigation of the air forces and their moments acting on the hang gliders. The hang gliders have elastic and flexible structure so the distribution of the air forces is characterised by the shape of the sail surface and the sail surface is either determined by the air force distribution. This research work is built. on the theoretical calculations and practical measurings. The results of this investigation can be applied principally to flight mechanical calculations of the hang gliders

IDENTIFICATION OF STRUCTURAL DAMPING OF A HELICOPTER ROTOR BLADE

In the elastic motion of helicopter rotor blades the structural damping also has an important role, The purpose of this article is the investigation of the mathematical model of the structural damping and the estimation of the parameters of this model. The parameter estimation is based on measurings (the first three natural oscillations were measured)