Watercraft has boat hull and movably mounted drive element which has blade that is vertically submerged in water and moves over certain distance in position parallel to longitudinal center line of boat hull through water

摘要

The watercraft has a boat hull (100) and a movably mounted drive element (110) which has a blade (121) that is vertically submerged in the water (101) and moves over a certain distance in the position parallel to the longitudinal center line of the boat hull through the water. The movement of the blade generated a drive of the boat hull in the water. The drive is generated by a blade element that is movably mounted to the lateral side of the boat hull.