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How do I use the golden spiral to make a hermit crab shell in SolidWorks?

Question asked by Patricia McDonaldson on Feb 17, 2016
Latest reply on Feb 22, 2016 by Patricia McDonaldson

I am trying to make a hermit crab shell, but am having trouble perfecting it. I have what is pictured below by using a helix defined by pitch and revolution with a variable pitch and just trying different numbers for the pitch and diameter. I think I should try implementing the golden spiral equation for this project. I am having trouble completing the spiral in the center top of the shell. I am also having trouble getting the spirals/revolutions to touch the one under it, you can see there is a gap in between the swirls in the picture below, but when I make the pitch any lower to try to close the gap, the loft feature does not work. What can I do here?

Capture.JPG

I don't think I want the shell to be a flat spiral, like in the following picture.

Ulitka.JPG

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