Help with surfacing please

Hello.
I’m new here, new to Rhino, played with Fusion but no expert and still very rookie stage.
I’m trying to design a plane around a 3 view to make a model of to build and fly.
I’m stuck on the surfacing, using the Sweep 2 Rails and also the Curve Network.
Whats happening is its tucking in on the curve. I want it sort of bulge out.
You

can see in the TOP view port it “tucking in”.

This is what i’m sort of aiming for.
I even drew another cross section to try surface too to bulge it out but then it tucked in again on the next cross section back so unsure what i’m doing wrong.
Capture1

take a look into this:
https://www.rhino3d.com/download/rhino/6/training-level-1