fillet root of propeller blade to hub in Rhino

Discussion in 'Software' started by malit92, Dec 4, 2017.

  1. malit92
    Joined: Nov 2013
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    Location: Philippines

    malit92 New Member

    Hello,

    Id like to ask for an advice on how to fillet root of propeller blade to the hub. Ive already tried "fillet edge" and "variable fillet radius" but still doesnt work.

    -m
     
  2. DCockey
    Joined: Oct 2009
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    Location: Midcoast Maine

    DCockey Senior Member

  3. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    It is possible that, if the hub is a closed surface, the program can not create the joining surface. Try a hub formed by several pieces, as many pieces as blades has the propeller.
     
  4. DCockey
    Joined: Oct 2009
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    Location: Midcoast Maine

    DCockey Senior Member

    TANSL, have you used Rhino? Rhino can create a fillet between a closed surface and another surface.
     
  5. TANSL
    Joined: Sep 2011
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    TANSL Senior Member

    @DCockey, I'm glad to know, I'll try. Yes, I use Rhino but I thought, without checking, that this option was not possible.
    Sometimes it has happened to me that an option is not possible with an object but it is possible when the object is broken into its parts.
    What we do know at this moment is that what @malit92 wants to do, with Rhino, is not possible or at least it is not possible in the way he wants to do it. Let's not stop exploring, therefore, any suggestion.
     
    Last edited: Dec 5, 2017
  6. tspeer
    Joined: Feb 2002
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    Location: Port Gamble, Washington, USA

    tspeer Senior Member

    How about:
    1. create offset surface from the blade and intersect with the hub to define the hub edge of the fillet,
    2. create an offset surface from the hub and intersect with the blade to define the blade edge of the fillet,
    3. create section curves connecting the hub and blade edges, making the curves tangent to the hub and blade surfaces at the edge,
    4. generate the fillet surface by using the sweep-two-rails command with the edge curves as rails.

    That should give you good control over the size and shape of the fillet. One way to generate the sections would be to use a freeform control points curve with the end points on the edge curves and the control points on the intersection between the blade and hub. That would generate what is basically a cubic curve with the right tangents on the ends.
     

  7. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    So, from what I see, if I have understood it correctly, it is not a simple Rhino command that does everything automatically.
     
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