Maybe move the S shape from the horizontal to the vertical plane. Then, you can handle the bend by dynamically changing the height of the pylons. It's still an

Maybe move the S shape from the horizontal to the vertical plane. Then, you can handle the bend by dynamically changing the height of the pylons. It's still an issue that at bends of this diameter, the approximation sin(x) = x is pretty accurate, which means it takes 300m of height difference to deal with 300m of thermal expansion. It might be workable to change that to e.g. 100 bumps of 3m.