Boeing 737 Max

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Boeing 737 Max

As far back as 2005 Boeing initiated project Yellowstone 1 (Y-1) to come up with an updated design building on the Boeing 737 Next Generation family. Incorporating technology from the Boeing 787 Dreamliner, the

737 Max tail cones

Tails of the Boeing 737 Max series. There are three different variants; the Boeing 737 Max 7, Boeing 737 Max 8 and Boeing 737 Max 9.

aim was to achieve fuel savings in the order of 20-25%. However, tests came back with results closer to 10%. It was found that you can’t build a smaller Boeing 787 which is designed for different usage such as lower cycles(take offs and landings) and carrying different systems for longer flights.

The project was shelved but not abandoned. New technologies had to be developed to enable the concept to become an actuality.

737 Max family

The Boeing 737 Max family of aircraft. Note the new winglets or wing fins. Weight is saved by a less robust structure required for two smaller fins.

On 11 August 2011 the Boeing board approved the 737 Max development project. The new family of Boeing 737s will adopt the same variant numbering system as the 787, namely Boeing 737 Max 7, Boeing 737 Max 8 and Boeing 737 Max 9. Details of each as known so far are shown below.

The new design will have some obvious visual differences which include:

737 Max Features Table

3d_blue_plane  A change to the tail cone to a more tapered aerodynamic shape
3d_blue_plane  Boeing 787 like engine nacelles with scalloped casing
3d_blue_plane  A split winglet with fins pointing up and down which reduces weight by a less robust structure required for two smaller fins
3d_blue_plane  Leap-1B engines with a larger fan diameter of 1.76 Metres (69.4 in)
3d_blue_plane  An increase of 8 inches in length to the nose wheel strut to accommodate the larger diameter engines
3d_blue_plane  A redesigned and lengthened engine pylon to further accommodate the larger engines
3d_blue_plane   A general strengthening of the air-frame structure
737max-winglet

The split winglet on the Boeing 737 Max requires less robustness which leads to weight saving.  Note also the Boeing 787 like scalloped engine nacelles.

Specs for the Boeing 737 Max

FAMILY
Boeing 737 Max
Variant
737 Max 7
737 Max 8
737 Max 9
Milestones
Maiden Flight Not yet known Not yet known Not yet known
Launch Delivery Not yet known 2017 Not yet known
Launch Airline Southwest Airlines Southwest Airlines Lion Air
Final Delivery None yet None yet None yet
Aircraft Built 0 0 0
In Current Service 0 0 0
Passenger Capacity 149 (1-class, high volume)
140 (1-class, average)
126 (2-class, average)
200 (1-class, high volume)
175 (1-class, average)
162 (2-class, average)
220 (1-class, high volume)
192 (1-class, average)
180 (2-class, average)
Power Plant CFM International CFM International CFM International
Model Leap-1B Leap-1B Leap-1B
Fan Tip Diameter 1.76 m (69.4 in) 1.76 m (69.4 in) 1.76 m (69.4 in)
Thrust 23,000–28,000 lbf (100–120 kN) 23,000–28,000 lbf (100–120 kN) 23,000–28,000 lbf (100–120 kN)
Dimensions
Fuselage
Fuselage Length 33.6 M (110 ft 4 in) 39.5 M (129 ft 6 in) 42.1 M (138 ft 2 in)
Overall Height 12.3 metres(40 ft 4 in) 12.3 metres(40 ft 4 in) 12.3 metres(40 ft 4 in)
Fuselage Width (Outside)
Cabin Width
Wing
Span 35.9 M (117 ft 9 in) 35.9 M (117 ft 9 in) 35.9 M (117 ft 9 in)
Wing Area
Dihedral
Sweep Back
Tail Fin
Aircraft Height
Tail Fin Height 12.5 M (41ft 0in) 12.5 M (41ft 0in) 12.5 M (41ft 0in)
Tail Fin Area
Rudder Area
Sweep Back
Undercarriage
Track
Wheelbase
Number of Nose-wheels 2 2 2
Number of Main-wheels 4 4 4
Cabin
Max. Certified Seating
Typical Seating (2 class) 126 162
Seats Abreast 6 6 6
Weights
Max. Ramp Weight
Max. Takeoff Weight 72,303 Kg (159,400 lb) 82,191 Kg (181,200 lb) 88,314 Kg (194,700lb)
Maximum Landing Weight
Max. Zero Fuel
Fuel
Capacity (Litres)
Speeds
Vmo/Mmo Velocity/Mach Maximum Operating speed
Cruise Speed IAS/Mach 842 Kph (522 mph) / Mach 0.79 842 Kph (522 mph) / Mach 0.79 842 Kph (522 mph) / Mach 0.79
True Airspeed (Kt)
Ceiling (Ft)
Range with Max Payload(nm) 7,038 Km (3,800 Nm) 6,704 Km (3,620 Nm) 6,658 Km (3,595 Nm)
Variant 737 MAX 7 737 MAX 8 737 MAX 9

If there is more you want to learn about this airliner, please visit: Boeing 737 Home, Boeing 737 Specs, Boeing 737 Order Book, Boeing 737 History, Boeing 737 Assembly and Boeing 737 Interior.
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