section_path: Design
section_name: Design
paragraph_text: Design
  
  The Boeing 787 Dreamliner is a long-haul, widebody, twin-engine jetliner, designed with lightweight structures that are 80% composite by volume; Boeing lists its materials by weight as 50% composite, 20% aluminum, 15% titanium, 10% steel, and 5% other materials. Aluminum has been used throughout the leading edges of wings and tailplanes, titanium is predominantly present within the elements of the engines and fasteners, while various individual components are composed of steel.
  
  External features include a smooth nose contour, raked wingtips, and engine nacelles with noise-reducing serrated edges (chevrons). The longest-range 787 variant can fly up to 7,565 nmi (14,010 km; 8,710 mi), or the even longer Qantas QF 9 flight between Perth and London Heathrow, over 7,828 nmi (14,497 km; 9,008 mi). Its cruising airspeed is Mach 0.85 (488 kn; 903 km/h; 561 mph). The aircraft has a design life of 44,000 flight cycles.