Quote:
Originally Posted by YCW
What determines the rate is the overall mass of steel, not how many coils there are (according to the Swift technician). Obviously on a linear spring, the coils need to be evenly spaced (regardless whether they are straight or barrel).
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I'm pretty sure it has nothing to do with the material's mass and a lot to do with its shear modulus. Given equal spring displacement, more coils result in less strain per unit length of wire.
This means the wire in the swift spring has to twist more than the generic spring for a given displacement.
I'm not expert in this application but in general, less turns must be paired with thinner/weaker wire to get the same spring constant. At some point it impacts lifespan of the spring.