777-300ER
The 777-300ER ("ER" for Extended Range) is the B-market version of the −300. It features raked and extended wingtips, a new main landing gear, reinforced nose gear, and extra fuel tanks.[163][164] It also has a strengthened fuselage, wings, empennage, and engine attachments.[87] The standardGE90-115B turbofan is the world's most powerful jet engine in service, with a maximum thrust of 115,300 lbf (513 kN).[163] Its maximum range is 7,930 nautical miles (14,690 km),[165] made possible by higher MTOW and increased fuel capacity.[156][157] The −300ER can fly approximately 34 percent further than the −300 with a full load of passengers and cargo.[87] Following flight testing, aerodynamics refinements have reduced fuel burn by an additional 1.4 percent.[80][166]
The first −300ER was delivered to Air France on April 29, 2004.[67][167] The −300ER is the best-selling 777 variant, having surpassed the −200ER in 2010,[1] and since its launch the model has been a primary driver of the twinjet's sales past the rival A340.[95] Using two engines produces a typical operating cost advantage of around 8–9 percent for the −300ER over the A340-600,[168] along with a 20 percent fuel burn advantage over the 747-400.[81] Several airlines have acquired the −300ER as a 747-400 replacement amid rising fuel prices.[81] As of June 2012, −300ER deliveries to 24 different customers totaled 345, with 267 unfilled orders.[1] Operators had 281 aircraft in service as of July 2011.[145] The −300ER's direct Airbus competitors have included the A340-600HGW and the upcoming A350-1000.[95][157]
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