Hi all here is the result and how to is not perfect but ok

Equiangular Spiral: this is how i have done it is: project equal lines distance on curve cone ? the nember off lines is equal to Equiangular Spiral times 8 in this case 32 line to make 4 turne ESpiral .
from the top view draw lines to divide circles in 8 pices equal ,
start tracing from out in with (truepointcurve) every quater turne, step down one cirle,
to the end be patient.



projected Equiangular Spiral on dome





spring created by projecting normal spiral on dome and egg