\r\nof measuring how a winglet, which is able to change its shape during

\r\nthe flight, is efficient. Conventionally, winglets are fixed-vertical

\r\nplatforms at the wingtips, optimized for a cruise condition that the

\r\nairplane should use most of the time. However, during a cruise, an

\r\nairplane flies through a lot of cruise conditions corresponding to

\r\naltitudes variations from 30,000 to 45,000 ft. The fixed winglets are

\r\nnot optimized for these variations, and consequently, they are

\r\nsupposed to generate some drag, and thus to deteriorate aircraft fuel

\r\nconsumption. This research assumes that it exists a winglet position

\r\nthat reduces the fuel consumption for each cruise condition. In this

\r\nway, the methodology aims to find these optimal winglet positions,

\r\nand to further simulate, and thus estimate the fuel consumption of an

\r\naircraft wearing this type of adaptive winglet during several cruise

\r\nconditions. The adaptive winglet is assumed to have degrees of

\r\nfreedom given by the various changes of following surfaces: the tip

\r\nchord, the sweep and the dihedral angles. Finally, results obtained

\r\nduring cruise simulations are presented in this paper. These results

\r\nshow that an adaptive winglet can reduce, thus improve up to 2.12%

\r\nthe fuel consumption of an aircraft during a cruise.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 136, 2018"}