What type of wing design does the Boeing 787 utilize?

The Boeing 787 utilizes raked wingtips as part of its wing design, which contributes significantly to the aircraft's performance and efficiency. Raked wingtips are characterized by their upward and outward extension from the wing's trailing edge. This design helps to reduce drag and enhance fuel efficiency by improving aerodynamics, allowing for better lift-to-drag ratios, especially during cruise flight.

The raked wingtips on the 787 also help in achieving greater aerodynamic efficiency across various speeds and conditions, enhancing overall performance. Additionally, this design allows for the use of a lighter wing structure, as it can handle aerodynamic loads more effectively, contributing to the aircraft's overall weight savings.

Other wing types mentioned in the choices, such as swept wings and delta wings, are common in different aircraft designs but do not provide the same benefits as raked wingtips in terms of efficiency and performance specifically tailored to the characteristics of the Boeing 787.