It is difficult to determine the exact time of the origin of Chinese paddles, and the earliest age of paddles can not be verified. It is said that Lu Ban saw the fish wagging its tail in the water and cut the wood into paddles.
According to the textual research of ancient books in China, Mimi's earliest age appeared in the Han Dynasty at the latest. According to Liu Xi's Ming Shi in the Eastern Han Dynasty, the word "sculling" has been explained, and it is believed that the force generated by it is along the ridge of the ship.
The shape of an oar is a bit like an oar, but it is bigger. Usually supported on the oar eaves of the stern or ship's side. One end enters the water in a bow shape, and the other end is tied to the boat. Shake the cornice rope by hand to make the paddle board extending into the water swing left and right. When the paddle swings, the pressure difference between the front and rear parts of the boat in contact with water will form a thrust to push the boat forward, just like a fish wagging its tail. The ancients had the saying that "one paddle has three paddles", and thought that the efficiency of paddles could reach three times that of paddles, because the change from paddles to paddles actually changed from intermittent paddles to continuous paddles, which improved the efficiency.
This kind of propulsion tool is superior to rowing. It is a continuous propulsion tool and has the function of steering a ship. Some experts in Britain believe that the invention of the propeller was inspired by the paddle, while Europeans were inspired by China's use of the paddle and invented the propeller. British experts have a point. The blades of a propeller that does not rotate intermittently are very similar to those of an oar that glides in the water.
Of course, manual drawing is also indispensable.