Editing Boeing 747 (section)

==== 747-400XQLR ====
After the end of the 747X program, Boeing continued to study improvements that could be made to the 747. The 747-400XQLR (Quiet Long Range) was meant to have an increased range of {{Convert|7980|nmi|abbr=on}}, with improvements to boost efficiency and reduce noise.<ref name="Boe_747-400XQLR">[https://web.archive.org/web/20020306000939/http://www.boeing.com/news/releases/2002/q1/nr_020225h.html "Boeing Offers New 747-400X Quiet Longer Range Jetliner"]. ''The Boeing Company'', February 26, 2002. Retrieved: December 17, 2007.</ref><ref>[http://www.geae.com/aboutgeae/presscenter/cf6/cf6_20020325.html "GE's CF6 Engine Models Tailored For Boeing's 747-400XQLR Wide-Body."] {{webarchive|url=https://web.archive.org/web/20090611140416/http://www.geae.com/aboutgeae/presscenter/cf6/cf6_20020325.html|date=June 11, 2009}} GE Aviation, March 25, 2002.</ref> Improvements studied included raked wingtips similar to those used on the 767-400ER and a sawtooth engine nacelle for noise reduction.<ref>Steinke, Sebastian. [https://web.archive.org/web/20090410050853/http://www.flug-revue.rotor.com/frheft/FRH0205/FR0205c.htm "Boeing Proposes 747-400X Quiet Longer Range"]. ''Flug Revue Online'', May 2002. Retrieved: July 15, 2011.</ref> Although the 747-400XQLR did not move to production, many of its features were used for the 747 Advanced, which was launched as the [[Boeing 747-8|747-8]] in 2005.<ref>Kingsley-Jones, Max. [https://www.flightglobal.com/in-focus-boeing-747-8-technical-description-and-cutaway/107801.article "IN FOCUS: Boeing 747-8 technical description & cutaway"]. Flight Global, November 13, 2012.</ref>