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Simple Donut?

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  • J Offline
    JClements
    last edited by 28 May 2008, 20:10

    I am puzzled why this ring shape doesn't produce a symetrical "donut". Note the "pinching" 180° from each other.Ring


    SubDived - simple ring.skp

    John | Illustrator | Beaverton, Oregon

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    • S Offline
      solo
      last edited by 28 May 2008, 20:14


      http://img258.imageshack.us/img258/930/donutvl6.jpg

      http://www.solos-art.com

      If you see a toilet in your dreams do not use it.

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      • J Offline
        JClements
        last edited by 28 May 2008, 20:24

        Solo, thanks.

        Next step. I've been trying to see how to replicate the outlet port for a pump using Subdivide ... if it is possible. See the red outline in the attachment.
        SubDivide Shape Derivatives - Example for  pump.jpg

        It is basically a spiral-like tube that surrounds a cylinder (where the impeller is located); its beginning diameter is equal to the depth of the cylinder, then expands to diameter at the discharge-end (where it would connect to a pipe).

        I thought the shapes (in the attached skp) would work, but I am obviously not "getting it".

        Any help you lend on how to visualize how to construct the beginning geometry would be appreaciated.


        SubDivide Shape Derivatives, pump.skp

        John | Illustrator | Beaverton, Oregon

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        • R Offline
          remus
          last edited by 29 May 2008, 05:43

          If you draw the cyliner first, then draw a blocked out version of the portal on to the outside of the cylinder, to use as the proxy.


          outlet port.skp

          http://remusrendering.wordpress.com/

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          • I Offline
            igor
            last edited by 3 Jun 2008, 00:17

            isnt that a turbo? like for cars? basicly an exhaust driven fan that boosts preassure in the cylenders and there fore boosts speed and efficiency. am i right?
            good luck with it, what ever it may be.

            The genius switch has no "off" position
            Intelegence is natrual, it takes real effort to be ignorant

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            • B Offline
              Buzzer1001
              last edited by 3 Jun 2008, 00:21

              iGor - check the spelling in your signature. Kind of ruins the point (unless it's intentional) when you misspell "intelligence" and "natural". ☀

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              • J Offline
                juju
                last edited by 3 Jun 2008, 11:12

                @igor said:

                isnt that a turbo? like for cars? basicly an exhaust driven fan that boosts preassure in the cylenders and there fore boosts speed and efficiency. am i right?
                good luck with it, what ever it may be.

                It looks like a centrifugal pump. Principal of the a turbo is much the same.

                Save the Earth, it's the only planet with chocolate.

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                • J Offline
                  JClements
                  last edited by 3 Jun 2008, 15:57

                  Yes, it is a centrifugal pump.

                  The hard part to draw is the discharge "Tube/pipe". Its diameter changes from where it connects to the body and ENLARGES significantly at the outlet end where there is a flange to which piping is connected (as shown with the red outline). Thus, the posting about whether the subdivision script could be used to speed up the drawing process of the discharge "Tube/pipe".

                  John | Illustrator | Beaverton, Oregon

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