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Boeing 737 MAX

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Boeing 737 MAX
File:Boeing 737 MAX computer-generated image.jpg
Artist's conception of the Boeing 737 MAX
Role Narrow-body jet airliner
National origin United States
Manufacturer Boeing Commercial Airplanes
Introduction 2017 (scheduled)
Status Under development
Developed from Boeing 737 Next Generation

The Boeing 737 MAX is a new family of aircraft being developed by Boeing Commercial Airplanes. The new family is based on the Boeing 737 Next Generation family, which it is to replace. It will be the fourth generation of the 737 family. The primary change is the use of the larger and more efficient CFM International LEAP-1B engines. The airframe is to receive some modifications as well. The 737 MAX is scheduled for first delivery in 2017, 50 years after the 737 first flew. Boeing has firm orders for the 737 MAX totaling 1,064 as of January 31, 2013.[1]

Development

Since 2006, Boeing has discussed replacing the 737 with a "clean-sheet" design (internally named "Boeing Y1") that could follow the Boeing 787 Dreamliner.[2] A decision on this replacement was postponed, and delayed into 2011.[3]

In 2010, Airbus launched the Airbus A320neo, a single-aisle jet aircraft which incorporated a new engine to improve fuel burn and operating efficiency. The decision was met with positive reaction by many airlines, which began making major orders for the improved aircraft, notably from AirAsia and IndiGo.[4][5][6] This put pressure on Boeing and on August 30, 2011, the company's board of directors approved the Boeing 737 MAX project. Boeing has stated that the 737 MAX will provide a 16% lower fuel burn than the current Airbus A320, and 4% lower than the Airbus A320neo.[7] Boeing expects the 737 MAX to meet or exceed the range of the Airbus A320neo.[8] The first 737 MAX aircraft is scheduled to be delivered in 2017.[7]

The three variants of the new family are the 737 MAX 7, 737 MAX 8 and 737 MAX 9 which are based on the 737-700, −800 and −900ER, respectively,[9] the best-selling versions of the 737 Next Generation family.[1] Boeing has stated that the fuselage lengths and door configurations from the Boeing 737 Next Generation family will be retained on the 737 MAX variants.

Customers

Initially, the customers for the 737 MAX were not disclosed, except for American Airlines. On November 17, 2011, Boeing released the names of two other customers – Lion Air and Aviation Capital Group. At that time, Boeing reported 700 commitments from 9 customers for the 737 MAX.[10][11] Then on December 13, 2011, Southwest Airlines announced they would be the launch customer for the 737 MAX with a firm order of 150 aircraft and 150 options.[12] In December 2011, Boeing had 948 commitments and firm orders from 13 customers for the 737 MAX.[13][14]

In January 2012, Norwegian Air Shuttle announced an order for 100 Boeing 737 MAX airliners, along with 22 Boeing 737-800 and 100 Airbus A320neo aircraft. This is the first European order for the 737 MAX and the entire order is valued at $11.4 billion.[15][16] In July 2012 Virgin Australia announced an agreement to order 23 MAX aircraft.[17][18] Later that same month, Air Lease Corporation (ALC) announced an order of 75 MAX aircraft.[19] Then on on July 12, 2012 United Airlines announced an order for 100 Boeing 737 MAX 9 and 50 737-900ER aircraft, with the total order valued at $14.8 billion.[20]

Boeing 737 MAX-9 display model, September 2012

In late July 2012, Aeromexico announced an agreement to order 90 737 MAX 8 aircraft.[21] In August 2012, Singapore Airlines' subsidiary Silk Air announced an agreement to order 31 737 MAX 8 along with 23 737-800 aircraft.[22][23] In September 2012, Ireland's air leasing company Avolon announced a firm order on 10 737 MAX 8s, 5 737 MAX 9s and 10 Next-Generation 737-800s.[24]

On October 1, 2012, Gol Transportes Aéreos confirmed a firm order of 60 737 MAX 8s.[25][26][27] On October 3, United States/Ireland's air leasing company GECAS finalized a firm order of 75 737 MAX 8s, plus 10 737-800s.[28][29] On that same day, an unidentified airline announced a commitment to 22 Boeing 737 MAX 8s.[30] On October 11, 2012, Alaska Airlines announced a firm order of 50 Boeing 737s, 20 737 MAX 8, 17 737 MAX 9, plus an additional 13 Boeing 737-900ER Next Generations.[31] On October 30, 2012, Russia's Aviation Capital Services announced a commitment to buy 35 Boeing 737 MAXs.[32]

On November 4, 2012, Kuwait's ALAFCO finalized a firm order for 20 Boeing 737 MAX 8s.[33] On November 5, 2012, Aeromexico finalized its order of purchasing 90 Boeing 737 MAX 8s and 9s, 60 of which are firm, and 30 are options.[34][35] On November 14, 2012, SilkAir finalized its order for 54 Boeing 737s (31 Boeing 737 MAX 8s, plus 23 Boeing 737-800s).[36]

On December 6, 2012, Icelandair committed to order 12 Boeing 737 MAX aircraft (8 MAX 8s, and 4 MAX 9s).[37][38]

On January 2, 2013, air leasing company Aviation Capital Group (ACG) has confirmed a firm order for 60 737 MAX aircraft, 50 of which are the MAX 8, and 10 which are the MAX 9.[39] After this order, the Boeing 737 MAX surpasses the 1,000 order milestone.[40]

On February 7, 2013, American Airlines finalized its order for 100 Boeing 737 MAX of the MAX 8 variant.[41] On February 13, 2012, Icelandair finalized its order for 12 Boeing 737 MAX, which later was increased to 16 aircraft (9 Boeing 737 MAX 8s, and 7 Boeing 737 MAX 9s).[42] On April 9, 2013, Turkish Airlines announced plans to order 50 737 MAX aircraft including 40 MAX 8s, and 10 MAX 9s.[43]

Design

As production standard, the 737 MAX will feature the Boeing Sky Interior with overhead bins and LED lighting based on the Boeing 787's interior, as well as winglets.[44]

New wingtip device on the 737 MAX

A new type of wingtip device is to be introduced on the new 737 versions. Resembling a three-way hybrid between a blended winglet, wingtip fence, and raked wingtip, Boeing states that this new design should deliver an additional 1.5% improvement in fuel economy over the 10–12% improvement already expected for the 737 MAX.[45]

The manufacturer plans no modification in the flight deck as it wants to maintain commonality with the 737 Next Generation family. Boeing also plans to add more fly-by-wire systems to the 737 MAX family, although Albaugh said that changes would be "very minimal." Boeing has confirmed that fly-by-wire controls will be added to the spoilers.[46]

Engines

Boeing spent most of 2011 evaluating two fan diameters of the CFM International Leap-1B engine: 66.1 in (168 cm) or 68.1 in (173 cm), both of which would require few changes to the landing gear to maintain a 16.9 in (42.9 cm) ground clearance beneath the engines. Boeing Commercial Airplanes CEO, Jim Albaugh, stated the larger fan diameter would produce less fuel burn, but because it is bigger, it produces more drag and is heavier, and would need more extensive airframe changes.[47]

Both fan diameters are an increase from the 61.8 in (157 cm) CFM56-7B engine on the Boeing 737 Next Generation. The updated airliner is also expected to feature external nacelle chevrons for noise reduction, similar to those on the 787 and 747-8. While the smaller Leap-1B engine would have a lower bypass ratio and higher specific fuel consumption (SFC) than the baseline 78 in (198 cm) Leap-X and 80.7 in (205 cm) Pratt & Whitney PW1100G engine options for the A320neo, the smaller engine will weigh less and create less drag on the airframe. The 66.1 in (168 cm) engine integrated on the airframe would offer an SFC improvement of 10–12% over the current 737NG CFM56-7B engine. Industry sources report that assessments are underway to revise the tail cone, natural laminar flow nacelle and a hybrid laminar flow vertical stabilizer for additional fuel burn decrease and drag reduction.[48]

In November 2011, Boeing announced the selection of the 68.1 in (173 cm) fan diameter. Because of the larger fan diameter compared to the 737 Next Generation family, the nose landing gear will have to be lengthened by 6–8 inches (15–20 cm) to maintain the required ground clearance.[49][50] Firm configuration for the 737 MAX is currently scheduled for 2013.[46] On May 17, 2012, Boeing announced a further modification to the fan diameter with an increase to 69.4 inches (176 cm). The larger fan will be paired with a smaller engine core than previously identified as part of a series of design tweaks before the final configuration is set in mid-2013.[51]

Variants

  • 737 MAX 7 – Replacement for the 737-700 and 737-700ER
  • 737 MAX 8 – Replacement for the 737-800
  • 737 MAX 9 – Replacement for the 737-900ER

Specifications

Boeing 737 MAX design specifications
737 MAX 7 737 MAX 8 737 MAX 9
Seating capacity 126 (2-class, typical) 162 (2-class, typical) 180 (2-class, typical)
Overall length 110 ft 4 in  (33.6 m) 129 ft 6 in  (39.5 m) 138 ft 2 in  (42.1 m)
Wingspan 117 ft 9 in  (35.9 m)
Overall height 41 ft 0 in  (12.5 m)
Cruising speed Mach 0.79 (522 mph, 842 km/h)
Maximum take-off weight 159,400 lb  (72,303 kg) 181,200 lb  (82,191 kg) 194,700 lb  (88,314 kg)
Range fully loaded 3,800 nmi (7,038 km) 3,620 nmi (6,704 km) 3,595 nmi (6,658 km)
Engine (× 2) CFM Leap-1B
Fan tip diameter 69.4 in (1.76 m)

Sources: Boeing 737 specifications[52][53]

Orders

Boeing 737 MAX firm orders
Date of
initial order 		Country Customer Aircraft Type Orders
Dec 13, 2011 United States Southwest Airlines[n 1] 737 MAX 8 150[14]
Jan 24, 2012 Norway Norwegian Air Shuttle 737 MAX 8 100[16]
Feb 22, 2012 Indonesia Lion Air[n 2] 737 MAX 9 201[54]
Jul 6, 2012 Australia Virgin Australia 737 MAX 8 23[55]
Jul 3, 2012 United States Air Lease (ALC) 60 737 MAX 8, 15 737 MAX 9 75[56]
Jul 12, 2012 United States United Airlines 737 MAX 9 100[57]
Sep 20, 2012 Ireland Avolon 10 737 MAX 8, 5 737 MAX 9 15[58]
Oct 1, 2012 N/A Unidentified 737 MAX 57[1]
Oct 1, 2012 Brazil Gol Transportes Aéreos 737 MAX 8 60[26][27]
Oct 3, 2012 United States/Ireland GECAS 737 MAX 8 75[28][29]
Oct 11, 2012 United States Alaska Airlines 20 737 MAX 8, 17 737 MAX 9 37[31]
Nov 4, 2012 Kuwait ALAFCO 737 MAX 8 20[33]
Nov 5, 2012 Mexico Aeromexico 737 MAX 8 60[34]
Nov 14, 2012 Singapore SilkAir 737 MAX 8 31[59]
Jan 2, 2013 United States Aviation Capital Group 50 737 MAX 8, 10 737 MAX 9 60[60]
Feb 7, 2013 United States American Airlines 737 MAX 8 100[61]
Feb 13, 2013 Iceland Icelandair 9 737 MAX 8 ,7 737 MAX 9 16[62]
Totals 1,180
Notes
  1. ^ Launch customer of 737 MAX 8 variant.
  2. ^ Launch customer of 737 MAX 9 variant.

See also

Related development

Aircraft of comparable role, configuration, and era

References

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  62. ^ eTN, Staff. "Icelandair Group and Boeing finalize orders for 737 MAX". GlobeNewswire. Retrieved 11/14/2012. {{cite web}}: Check date values in: |accessdate= (help)

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