Design of a Symmetrical Quad-rotor Biplane Tail-Sitter Aircraft without Control Surfaces and Experimental VerificationHongyu Wang, Xun Zhao, Hui Bai, Cunyue Lu, Baomin Zhang and Cong LiMATEC Web Conf., 151 (2018) 04009DOI: https://doi.org/10.1051/matecconf/201815104009