Retractable water rudder structure embedded in rudder

The invention relates to a water plane retractable water rudder, in particular to a retractable water rudder structure embedded in a rudder. The retractable water rudder structure embedded in the rudder comprises the rubber (1), a water rudder (2) and a hinge inhaul cable (3), wherein a rudder beam (11) and a rib structure are arranged on the rubber (1); the water rudder (2) is arranged in the rubber (1) and can rotate up and down; and the hinge inhaul cable (3) is arranged in the rubber (1) to control the retraction of the water rudder. When the water rudder (2) begins to work, the hinge inhaul cable (3) is loosened, and the water rudder (2) rotates downwards and reaches a working position and then rotates with the rubber (1) to control the course of an airplane. When the water rudder (2)finishes working, the hinge inhaul cable (3) is tightened, and the water rudder (2) is pulled to retract into a placing position in the rudder (1). according to the retractable water rudder structureembedded in the rudder, b