Wingtip devices configured to extend from the outboard ends of aircraft wings are designed to effectively reduce induced drag, but they necessarily produce form and skin-friction drag, and they may produce interference and compressibility drag. The present disclosure describes a scythe-shaped wingtip device (or ‘winglet’ or ‘extending member’) suitable for reducing the induced drag of an aircraft wing while minimizing other types of drag. A cutout in the wingtip device reduces the wetted area of the wingtip to minimize non-induced drag while the wingtip device still reduces induced drag like a conventional wingtip device. The cutout is configured in a trailing edge of the wingtip device.