Lofting offset curves following a curve?

Trying to loft these two circles together following the curves on the quadrants. Any ideas?

Try a 1 or 2-rail sweep.
Rail sweeps follow rail curves.
Loft does not follow curves.

Like @bigpiper246 says. Hard to say if that is what you want, also what the continuity relationship to the neighbouring surfaces shall be.

That’s exactly what I need. Sweep 2 didn’t work for me, but I was able to use NetworkSrf between the two “rails” and two cross-sections to I wanted.

what settings did you use for that sweep?

No settings. Just clicked the two rails and the three curves.
Sweep2Rails.3dm (2.1 MB)

The key to the Sweeps is to bias your selection clicks towards the corresponding curve ends. Otherwise the resulting surface will flip and self-intersect.