Morphing cross-medium unmanned craft

A morphing cross-medium unmanned craft, comprising a main hull, side hulls set on both sides of the main hull respectively, a rudder set at the rear of the main hull and a propeller set under or behind the main hull, a cross profile of the side hulls is an airfoil and the side hulls can be flipped relative to the main hull, and the rudder can rotate around the longitudinal axis of the main hull;

• when the two side hulls are flipped to both sides of the main hull and form a trimaran ship configuration with the main hull, the cross-medium unmanned craft is in a surface navigation mode;
• when the two side hulls are expanded relative to the main hull, the cross-medium unmanned craft is in a flight mode, and the two side hulls form the wings on both sides of the main hull;
• when the two side hulls are flipped to fit with the two sides of the main hull or are stored inside the main hull, the cross-medium unmanned craft is in the submergence mode, and the two side hulls form the outward rudder or lateral fins on both sides of the main hull;
• the propeller can perform different working mode switching respectively when the cross-medium unmanned craft is in water surface navigation mode, flight mode or submergence mode;
• the rudder can perform different orientation switching respectively when the cross-medium unmanned craft is in water surface navigation mode, flight mode or submergence mode.