The Lifting System of a PrandtlPlane, Part 2: Preliminary Study on Flutter Characteristics

Abstract

In this part of the paper, a preliminary flutter analysis of the PrandtlPlane 250-seat aircraft is presented. The analysis is performed on the structural solution obtained after that the constraints of maximum static stress, structural instability under compression loads, minimum aileron efficiency, aeroelastic effects on load distribution and flutter conditions were satisfied. A new flutter analysis is performed in order to try to find the main parameters affecting the flutter characteristics of the system. The results show that flutter does not appear to be critical and, also, that this system allows one to position tanks on the tips of the front wing, with a flutter speed improvement.