Why blades are a special kind of ODC
A blade's length is the main challenge. Its overhang beyond the trailer changes how the vehicle turns, and every curve, roundabout and village junction has to be checked in advance. The blade's surface must be protected from scratches and stress, and support points have to follow the manufacturer's guidance.
Tower sections, nacelles and hubs bring their own problems: tower sections are wide and heavy, and nacelles are tall and heavy. Each component is planned separately.

