Drag reduction efficiency of ships

The present invention relates to a drag reduction efficiency of ships, comprising a hull (1) and a propeller (2), the bottom of the hull (1) provided with guide grooves (11), the propeller (2) is located (11) within the guide groove mounted on the hull (1), the hull (1) is provided with a rear arc swirler (12), the hull (1) located on the left side wall of the submerged tail water tank along with left diagonal (13), the hull (1) right side wall provided with a tail at right oblique cis underwater tank (14). When this ship sailing forward vortex formed smaller tail, back on the hull drag force is smaller, you can increase the forward speed and power efficiency of navigation, faster, more efficient ship back maneuvers, shift to a more flexible Convenience. Compared with the same level of naval ships, in the case of the same power output, such ships existing ordinary vessels and warships set sail on speed, speed, turning speed, the speed back maneuvers should have further improved than that, more obvious advantages, the effect is more prominent.