| 摘要 |
PURPOSE:To improve the propulsion efficiency of a marine vessel by most effectively arranging fins in the back stream of an propeller so as to enable to effectively recover rotating energy capable of recovering. CONSTITUTION:The outside diameter position at propeller rotation is defined as 2 to the external form 1 of a valve. Plural fins 3 are radiately fixed to a valve 1 in the range of starboard upper side and arranged shorter than a propeller outside diameter position 2. Further plural fins 4 which reach the propeller outside diameter position 2 are arranged in a port lower side range. |
