Mistakes in your design: 0.-The profiles are too complex , should be simplyfied. 1.-Your profiles are open and is shown in the points when you are going outside from the sketch. 2.-There is no parametrization in your design = You have to remake the design every single time that you need to change NACA profile. 3.-You can import any Naca profile using excel review the file (GSD_PointSplineLoftFromExcel) in your cpu located located in ; C:\Program Files (x86)\Dassault Systemes\B21\intel_a\code\command 4.-Your current design will have many problems when you will ran the simulation in CFD due to tangency - missing in your design. Parametric design will save you a lot of time for multiple iterations in CFD. 0.-Generate and axis, translate the axis 350 rotate the same axis 60deg and displace the axis 50 1.-Divide the profile in 2 Upper and Lower (you should work in wireframe not in sketch) 2.-Translate the profiles (Upper & Lower) axis to axis use afinity (Wireframe) 3.-repite same steps for the winglet (use tangency when you are using Multisection surface betzen the winglet and the wing). 4.-Join all the surface 5.-Apply Close surface , (all the part should be tangent at this point with no issues to apply future radius) Now should be ok for simulation> Good lcuk! My experience ; Cabine leader for interior design & Simulations.