The flight mechanical model of tilt-rotor UAV is the basis of designing flight control rate and analyzing flight characteristics. Based on the engineering reality. the nonlinear flight mechanics model of a new configuration tilt-rotor UAV is set up. Features and advantages of the new type rotor-craft are analyzed compared with the traditional tilt-rotor. https://www.roneverhart.com/Whirlwind-Direct-2-Direct-Box-p14308/