The blade: I made a profile of the blade with three splines, and then a green cross section of the blade in the middle. I then copied the cross section and changed those to fit the three splines. There's a Spline/Patch CrossSection and Surface on top. With the red splines guiding the features, it's quite easy.
The head: It's just a lathed curve with lots of cut polygons, extrusions, and vector adjustments, with a NURMS on top. I'm not skilled, and it took me about two hours.
Any tips you have?