Which feature specifically enhances the aerodynamic performance of the Boeing 787?

The feature that specifically enhances the aerodynamic performance of the Boeing 787 is the raked wingtips. Raked wingtips are designed to improve the aircraft's efficiency by reducing drag and enhancing lift at various speeds. The unique shape extends the effective wingspan without increasing the overall size of the wings, allowing for smoother airflow over the wings, thus improving overall aerodynamic characteristics.

This design choice plays a crucial role in optimizing the performance of the Boeing 787, contributing to its fuel efficiency and range. The improved aerodynamics also facilitate better performance during takeoff, cruise, and landing phases, which is vital for long-haul flights, where efficiency is paramount. Consequently, the raked wingtips not only benefit flight dynamics but also support the operational economics of the airplane by reducing fuel consumption.