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The aim of this paper is to present the performance analysis for an inverted joined wing aircraft demonstrator. Its configuration is said to offer lower drag in comparison to conventional aircraft, resulting in L/D ratio improvement and better performance in general. Moreover, the solution with wings inverted, i.e. with the front wing located above the aft wing, seems to give an even better L/D ratio for a wider range of angles of attack. This paper aims at presenting an aeroplane's performance analysis, beginning from the determination of fundamental aircraft aerodynamic characteristics on the basis of wind tunnel tests, to the assessment of powered aircraft characteristics. Such an analysis will answer the question whether the proposed propulsion unit is suitable in this specific case, which means that it will determine if the climb ratio and maximum endurance are adequate. It is crucial to assess these factors before flight tests are initiated as they have a direct influence on the safety of th...

PREDICTED PERFORMANCE OF THE INVERTED JOINED WING SCALED DEMONSTRATOR