This thesis work to develop a useful tool for the preliminary design of a supersonic civil aircraft, fitting within the European project "MORE & LESS" ("MDO and REgulations for Low-boom and Environmentally Sustainable Supersonic Aviation"). As a matter of fact, subsonic aviation is undergoing rapid and deep developments to be more efficient, performant and, the most important, sustainable. On the other hand, travelling faster than the speed of sound appears necessary to connect people from around the world in an ever-faster way. In such a scenario this project, coordinated by Politecnico di Torino and funded by the European Union, poses the problem of reviewing the environmental impact of supersonic aviation.