Aircraft prop blades

[Stiglr]

For wings I try to get a cross section of the airfoil. This I extrude and "thin" all the way out to the tip, taking care to segment for easy isolation of flap and aileron cutouts as I go. This normally creates one inner wing, one center wing, and an outer wing.

On the fuselage join end, I'll usually describe the join area on the fuselage with vertices, and cut it out to make a hole. Then, manually create the faces between the join area and the inner wing. If there's a scallop between the fuselage weld and the inner wing, I may need to do a Knife cut or two and drag/scale the rows of vertices to fit, using the front (head-on) view as a guide.

On the wingtip end, I use an odd method, but it seems to work for me, better than trying to simply round off a airfoil shape:

After extruding the wing all the way to the start of the rounded tip, I first draw an outline of the tip in Top View using the Line tool (not a poly). This I copy and paste directly below the original outline, then position and rotate both outlines to create the proper taper of the wingtip. I Merge the outlines and the outer wing into one object, weld the tips' innermost vertices to the closest corresponding vertice on the open ends of the outer wing, then manually create the top, side and bottom faces of the wingtip, one at a time, taking care to create the faces by selecting vertices counterclockwise, so as not to create inward-looking faces. (you're usually well advised at some point to make the whole object one sided, so you can see any facing problems as you create them.)