To reduce a weight of a blade while securing performance of boat rowing action and steering action of a paddle.SOLUTION: A blade 10 as a blade 10 mounted on a shaft 20 of a paddle includes a front face 11a raking water, and a back face 11b facing the front face 11a, and has a pore-forming region 12 formed with pores 13 for communicating the front face 11a and the back face 11b. The blade 10 has in the front face 11a and the back face 11b, a wavy region 14 in which protrusions 15 and recesses 16 extending an almost longitudinal direction of the blade 10 are alternately formed to generate lift force. The blade 10 has projections 17 for removing water, formed on the back face 11b.SELECTED DRAWING: Figure 2
ブレード及びパドル
2023-07-28
Patent
Electronic Resource
Japanese
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |