BOEING: Keen spotter types will notice a difference between the now traditional Boeing 777 and its latest stable mate, the 777”300ER and 200LR. Both of the new derivatives are spouting raked wing tips, which Boeing claim, is expected to add 2% to fuel economy, saving as much as $140,000 per aircraft per year. The 6.5 ft extensions also improve take off field length and climb performance. At the other end of the scale the 500+ seat 747”400s used by JAL and ANA for high intensity short haul operations do not have the short wing tip turn-ups common to all other jumbos.
http://www.boeing.com