2.2.1. Configuration Selection

Through a preliminary evaluation process in compliance with the given TLAR [5], some design possibilities were excluded. The remaining design possibilities are shown in Figure 2. In this assessment, the design possibilities were evaluated by performance, environment and economics as well as operational aspects. Since the focus of this work lies in the basic design of the aircraft, no detailed analyses of the individual structures and aerodynamics were performed. Nevertheless, this work is based on scientific evidence by using estimation formulas for the design according to reliable sources [11,14,17,18]. The aim of the configuration selection is to identify a performing concept and to place the performance in relation to the reference aircraft. In the following sections, the reasoning behind every decision is explained.

**Figure 2.** All investigated design possibilities listed by their category.
