I attached part file and I want to create lofted bend or lofted form to produce the part which I want. I keep on trying to make lofted bend but it says bend radius is too big. I need to make end loft bend in my design can anyone please help me.

Also, that lofted bend part need to flatten so that I can cut on plasma, I am unable to make a flatten.

Please give me some ideas on that.

Thank you.