The serrated trailing edge of a wind turbine blade - also called DinoTail (Siemens), feathered, sawtooth - helps improve airflow over the surface, resulting in less turbulence, better aerodynamics and reduced noise as the blade cuts through the air. Inspired by the rough edges on an owl's wings, the same trick is used on jet engine housings.

Cross section through the trailing edge of a wind turbine rotor blade produced from high modulus glass fibre reinforced epoxy over a balsa wood core. The two halves are bonded with two-part epoxy.

Cross-section through a wind turbine rotor blade, showing the balsa wood core, carbon fibre spar cap top and bottom, shear webs bonded with two part epoxy adhesive, and high modulus glass fibre epoxy skin. Altogether, it makes a very strong, light and enduring structure.