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Subject: Boeing 737 MAX
Date: 10 Aug 2018 06:31:35 -0700
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https://en.wikipedia.org/wiki/Boeing_737_MAX
The Boeing 737 MAX is an American narrow-body aircraft series designed and
produced by Boeing Commercial Airplanes as the fourth generation of the Boeing
737, succeeding the Boeing 737 Next Generation (NG).
In summer of 2011, the objective was to match the A320neo 15% fuel burn
advantage, but the initial reduction was 10-12%; it was later enhanced to 14.5%:
the fan was widened from 61 inches to 69.4 inches by raising the nose gear and
placing the engine higher and forward, the split winglet added 1-1.5%, a
relofted tail cone 1% more and electronically controlling the bleed air system
improves efficiency.
The program was launched on August 30, 2011. The first flight was on January 29,
2016. It gained FAA certification on March 9, 2017. The first delivery was a MAX
-8 on May 6, 2017 to Malindo Air, which put it into service on May 22, 2017. The
737 MAX is based on earlier 737 designs. The MAX is re-engined with more
efficient CFM International LEAP-1B powerplants, aerodynamic improvements (most
notably split-tip winglets), and airframe modifications.
The 737 MAX series is offered in four lengths, typically offering 138 to 230
seats and a 3,215 to 3,825 nmi (5,954 to 7,084 km) range. The 737 MAX 7, MAX 8,
and MAX 9 replace, respectively, the 737-700, -800, and -900. Additional length
is offered with the further stretched 737 MAX 10. As of June 2018, the Boeing
737 MAX has received 4,649 firm orders.
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. It should deliver at least
1.5% improvements in fuel economy or even more if the proposed laminar flow
surface treatment meets expectations. A MAX 8 with 162 passengers on a 3,000 nmi
(5,600 km) mission will have up to a 1.8% better fuel burn than a
blended-winglet-equipped aircraft and even 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.
Role
Narrow-body twin-engine jet airliner
National origin
United States
Manufacturer
Boeing Commercial Airplanes
First flight
January 29, 2016
Introduction
May 22, 2017 with Malindo Air
Status
In service
Primary users
Air Canada
Southwest Airlines
Lion Air
Air China
Produced
Number built
162 as of June 2018
Program cost
Unit cost
MAX 7: US$96.0 million
MAX 8: $117.1M
MAX 200: $120.2M
MAX 9: $124.1M
MAX 10: $129.9M as of 2018
Developed from
Boeing 737 Next Generation
The 737-700, -800 and -900ER, the most widespread versions of the previous
737NG, are replaced by the 737 MAX 7, MAX 8 and MAX 9, respectively (FAA type
certificate: 737-7, -8, and -9). The 737 MAX 8 entered service in May 2017, and
the MAX 9 entered service in March 2018. The MAX 7 is expected to enter service
in January 2019, followed by the MAX 200 later in 2019, and the MAX 10 in 2020.
Boeing forecasts that 60-65% of demand for the airliner will be for the 737 MAX
8 variant, 20-25% for the MAX 9 and MAX 10, and 10% for the MAX 7.
Variant 737 MAX 7
Seating 138 (8J + 130Y) to 172 max
Length 116 ft 8 in / 35.56 m
Wingspan 117 ft 10 in / 35.92 m
Wing Area 1,370 sq ft (127 m2)
Overall height 40 ft 4 in / 12.3 m
Max takeoff wt 177,000 lb / 80,286 kg
Max ldg weight 145,600 lb / 66,043 kg
Fuel capacity 6,820 USgal / 25,817 L, excluding ACT
Cruising speed Mach 0.79 (453 kn; 839 km/h)
Range 3,850 nmi / 7,130 km
Ceiling 41,000 ft (12,000 m)
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