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Build a three-dimensional wing from airfoil sections and export it as CAD geometry. The planform is defined by four splines — leading edge, trailing edge, dihedral and twist — that you drag directly, rather than by a fixed set of numbers, so a hydrofoil, a sailplane panel and a propeller blade are all the same tool.
Root and tip take any airfoil from the 1,600+ profile library, or a custom shape you built in the Kulfan canvas. Sections between them are lofted from the CST parameters rather than from resampled point clouds, so the surface stays mathematically continuous at whatever resolution you export.
The outboard end closes with a rounded tip cap whose end tangents follow the leading- and trailing-edge rails, so it continues the planform instead of kinking off it. Trailing-edge thickness is set in millimetres, because a knife edge is not manufacturable and a slicer will not print one.
STEP gives a solid with real surfaces for Fusion 360, SolidWorks, Onshape or FreeCAD. STL gives a triangle mesh for slicers, CNC toolpathing and print preview. Section count controls the loft density on both. Generating geometry is free and needs an account only so the design can be saved.
Templates cover the common cases — surf and pump hydrofoils, RC wings — sized from real designs rather than from round numbers, so you can scale one to your span and area instead of starting from a blank planform.