Rowing with fluid flow driven by orifu00cdcios and / or cavities and / or reliefs and / or textures.

摘要

The invention belongs to the technical field of Naval Engineering and Sport rowing boats for propulsion.The oars are characterized by a combination of orifices (3) (6) (7) (8) (9) (10), cavities (2), grooves (4) (11) and textures (1) to (5), along the surface of the shoulder and / or cane, who, through their so, insertion and positioning, determine the specific behavior, and Out of the water.Through the conditioning of the variability of resistance of rowing along the stroke allows you to improve its efficiency propulsiva in constant adaptation to the effort of the rower and improving efficiency on the whole.The passage of water through several holes 3) (6) (7) (8) (9) (10), the great majority are inclined in relation to the normal rowing, but successively aligned with the direction of water during the stroke, may make the resistance to movement.The existence and alignment of grooves (4) (11) on the surface of the man makes his slide in the water with the textures (1) to (5), on its surface, a general decrease of friction.