PROBLEM TO BE SOLVED: To provide a propeller with large torque having a shape that can make a propeller provide large rotation torque.SOLUTION: At a cross section of a maximum chord length part 3B of a vertical lift-type blade 3, a front edge is shaped into a spherical surface and a curved surface is shaped from the diameter part thereof to a rear edge so that a water flow passing along a rear face flux line V along the curved rear face 3G thereof crosses at 30 to 45 degree relative to a chord center line K of the blade on the rear edge 3G.SELECTED DRAWING: Figure 3


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    Title :

    風水車用のプロペラ


    Publication date :

    2020-03-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F03B MACHINES OR ENGINES FOR LIQUIDS , Kraft- und Arbeitsmaschinen oder Kraftmaschinen für Flüssigkeiten / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F03D Windkraftmaschinen , WIND MOTORS



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