page_title: Boeing 737 MAX
section_title: Aerodynamic changes
hierarchical_section_title: Boeing 737 MAX / Design / Aerodynamic changes
caption_attribution_description: Español: Boeing 737-8 MAX (N8704Q cn 36988/5788) at 2016 Farnborough Airshow (EGLF / FAB)
context_page_description: The Boeing 737 MAX is the fourth generation of the Boeing 737, a narrow-body airliner manufactured by Boeing Commercial Airplanes. It succeeds the Boeing 737 Next Generation.
  It is based on earlier 737 designs, with more efficient CFM International LEAP-1B engines, aerodynamic changes including its distinctive split-tip winglets, and airframe modifications.
  The new series was publicly announced on August 30, 2011. It took its maiden flight on January 29, 2016 and gained FAA certification in March 2017. The first delivery was a MAX 8 in May 2017, to Malindo Air, with whom it commenced service on May 22, 2017.
  The 737 MAX series has been offered in four variants, offering 138 to 204 seats in typical two-class configuration and a 3,215 to 3,825 nmi range. The 737 MAX 7, MAX 8, and MAX 9 are intended to replace the 737-700, -800, and -900, respectively. Additional length is offered with the further stretched 737 MAX 10. As of December 2019, the Boeing 737 MAX had received 4,932 firm orders and delivered 387 aircraft.
  In the aftermath of two fatal accidents, Lion Air Flight 610 and Ethiopian Airlines Flight 302, the 737 MAX was grounded worldwide in March 2019.
context_section_description: The split tip wingtip device is designed to maximize lift while staying in the same ICAO Aerodrome Reference Code letter C gates as current 737s. It traces its design to the McDonnell Douglas MD-12 1990s twin-deck concept, proposed for similar gate restrictions before the Boeing merger. A MAX 8 with 162 passengers on a 3,000 nmi (5,600 km) flight is to have up to a 1.8% better fuel burn than a blended-winglet-equipped aircraft and 1% over 500 nmi (930 km) at Mach 0.79.
  The new winglet is 9 ft 6 in (2.90 m) high. Other improvements include a re-contoured tail cone, revised auxiliary power unit inlet and exhaust, aft-body vortex generators removal and other small aerodynamic improvements. Aviation Partners offers a similar "Split-Tip Scimitar" winglet for previous 737NGs. It resembles a three-way hybrid between a blended winglet, wingtip fence, and raked wingtip.
caption: Boeing's new "split tip" winglet on the 737 MAX
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