helix

 From:  Michael Gibson
3447.5 In reply to 3447.2 
Hi Morten, also as Steve mentioned above, when you use more turns, the sloping nature of the spiral is distributed over a wider area and ends begin to resemble a circle more closely in its starting tangent.

But it will still have a sloping aspect to it and not be identical to a circle tangent at the start and end.

- Michael