If you show by picture,it would be great. If it is secret,just show only the area which the dimensions were doubled. I think it's better. And what we want to know is what happen before that.
First of all I have to say that I am quite an expert in creating wing,but I have some experience in creating airfoil(blade in jet-engine). I ever work at Chromalloy(Thailand) before as Reverse Engineer. I am not quite sure about your 3d curve because from my experience I prefer to use 2d curve...
My version I use is CatiaV5R17, but I'm not certain which version you have now.http://files.engineering.com/getfile.aspx?folder=67fbac93-6f32-47eb-9e5e-5d72139a81a4&file=Mymethod.doc
I am not sure that it is necessary to use 3d curve for your case or not, but for me, if I can,I will create plane in 3d space first and sketch on that plane instead.
I think ,for me,I am going to use the circles telling leading edge & trailing edge radius to control leading edge and trailing edge profile and I am going to link 2 circle with line(length),but you have to change it to be construction element as well.