The blended winglet sculpture outside the Museum of Flight.  The blended winglet is an option that current aircraft operators can purchase to upgrade their existing fleet of Boeing aircraft.  &lt;br /&gt;
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Winglets minimizes wing vortexes and decreases induced drag.  Adding winglets to older model aircraft typically decreases the fuel used, which increases the range and fuel efficiency.  The blended winglet, seen here, is an upgrade to Boeing's original winglet design first seen on Boeing 747-400 and C-17 aircraft.  Instead of an angular transition from the wing to the winglet surface, a more gradual, curving transition.