Editing Wide-body aircraft (section)

=== Engines ===
[[file:General Electric GE90 displayed at Farnborough Air Show 2008.jpg|thumb|The [[General Electric GE90]] is the most powerful [[turbofan]] engine.]]

As jet engine power and reliability have increased over the last decades, most of the wide-body aircraft built today have only two engines. A [[twinjet]] design is more [[fuel-efficient]] than a [[trijet]] or [[quadjet]] of similar size.{{citation needed|date=January 2019}} The increased reliability of modern jet engines also allows aircraft to meet the [[ETOPS]] certification standard, which calculates reasonable safety margins for flights across oceans. The trijet design was dismissed due to higher maintenance and fuel costs compared to a twinjet.{{citation needed|date=January 2019}} Most modern wide-body aircraft have two engines, although the heaviest wide-body aircraft, the Airbus A380 and the Boeing 747-8, are built with four engines. The upcoming Boeing 777X-9 twinjet is approaching the capacity of the earlier Boeing 747.<ref name="Bus"/><ref name="Tina"/>

The Boeing 777 twinjet features the most powerful jet engine, the [[General Electric GE90]].<ref name=120119PR>{{cite press release |url= https://www.geaviation.com/press-release/ge90-engine-family/record-year-worlds-largest-most-powerful-jet-engine |title= Record Year For The World's Largest, Most Powerful Jet Engine |date= January 19, 2012 |publisher= GE Aviation}}</ref> The early variants have a fan diameter of {{convert|123|in|cm|0|order=flip}}, and the larger GE90-115B has a fan diameter of {{convert|128|in|cm|0|order=flip}}.<ref>{{cite press release |url= https://www.geaviation.com/press-release/ge90-engine-family/ge90-115b-fan-completing-blade-testing-schedule-first-engine-test |title= GE90-115B Fan Completing Blade Testing; On Schedule For First Engine To Test |date= June 17, 2001 |publisher= GE Aviation }}</ref> This is almost as wide as the {{convert|3.30|m|in|0}} [[Fokker 100]] fuselage. Complete GE90 engines can only be ferried by outsize cargo aircraft such as the [[Antonov An-124]], presenting logistics problems if a 777 is stranded in a place due to emergency diversions without the proper spare parts. If the fan is removed from the core, then the engines may be shipped on a Boeing 747 Freighter.<ref>{{cite news |title= GE strives to identify Air France engine fault |url= https://www.flightglobal.com/news/articles/ge-strives-to-identify-air-france-engine-fault-203826/ |work= [[Flight International]] |date= January 3, 2006 }}</ref>
The [[General Electric GE9X]], powering the Boeing 777X, is wider than the GE90 by {{convert|6|in|cm|0|order=flip}}.

The {{convert|560|t|lb}} [[maximum takeoff weight]] of the Airbus A380 would not have been possible without the engine technology developed for the Boeing 777 such as contra-rotating spools.<ref>{{cite book | url = https://books.google.com/books?id=KcaYjPhRnWUC&pg=PA105 | title = Airbus A380: superjumbo of the 21st century
|author1=Guy Norris |author2=Mark Wagner | year = 2005 | publisher = Zenith Imprint | isbn = 9780760322185 | pages = 105–115 }}</ref> Its [[Trent 900]] engine has a fan diameter of {{convert|116|in|cm|order=flip}}, slightly smaller than the GE90 engines on the Boeing 777. The Trent 900 is designed to fit into a Boeing 747-400F freighter for easier transport by [[air cargo]].<ref>{{cite book | url = https://books.google.com/books?id=KcaYjPhRnWUC&pg=PA111 | title = Airbus A380: superjumbo of the 21st century
|author1=Guy Norris |author2=Mark Wagner | year = 2005 | publisher = Zenith Imprint | isbn = 9780760322185 | page = 111 }}</ref>