For nearly a hundred years, the role of the propeller has never been lacking, but rather a lot of "deformation". In addition to the common styles, different types of marine propellers also include variable pitch propellers, counterpropellers, guide vanes, pod propellers, water jet propellers, etc.,

The history of propellers can be traced back to the records in "Tiangong Kaiwu", which was found on the chariots of the Yellow Emperor. In the Tang Dynasty, Li Wei installed a human paddle wheel on the side or the side of the ship, called the "paddle ship" or "wheel ship" (this is the origin of the