On the maximization of control power in low-speed flight

Abstract

The present work extends existing knowledge on the subject in two directions: (i) on theoretical side by allowing for the deflections of multiple control surfaces, that gives more options to obtain the desired forces or moments with less risk of flow separation or aeroelastic effects; (ii) on the application side by considering not only minimum drag but also maximum drag (e.g. for fast descent) and maximum control moments for emergencies, such an engine-out condition. These applications are made to a FW, extending the scope of the literature that concentrates mostly on minimum drag for pitch trim in cruise. Thus the present paper is also a contribution to the expanding literature on various aspects of the BWB aircraft.