Issues in creating surface on shell structure

Hi all,
Is there any way to make a surface as shown in the figure.When i try to draw surface from point 1 to 2 and 2 to 3, it gives straight lines instead of curves Basically i’m trying to mesh quarter span surface and add load case only for that portion
Any help would be nice :slight_smile:

Thank you
3. Doubly curve (28.7 KB)