Boeing 737 begins from three

Will be ready in 2017 in the 7-8-9 configuration - from 126 to 215 seats. Consume up to 15% less than current NG and his name is MAX.

All started 51 years ago with the 737-100. At first, the 737 was called the "square" airplane because it was as long as it was wide. The new technology made the position of flight engineer redundant; the 737's two-person flight deck became standard among air carriers. 

The evolution is a new family of aircraft – 737 MAX 7, 737 MAX 8 and 737 MAX 9 builds on the strengths of the Next-Generation 737.

MAX7 will have 126 to 149 seats, MAX8 from 162 to 189 seats and MAX9 from 189 to 215 seats.

The 737 MAX will deliver big fuel savings that airlines will need to successfully compete in the future. Airlines will benefit from a 7 percent advantage in operating costs over future competing airplanes as a result of optimized CFM International LEAP-1B engines, more efficient structural design and lower maintenance requirements.

Boeing is 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 be unlikely to require the modification of the landing gear: there is a need to maintain a 16.9 in (42.9 cm) ground clearance beneath the aircraft's engines and ground surface.

The 66 in (168 cm) diameter fan is an increase from the 61.8 in (157 cm) CFM56-7B engine on the Boeing 737 Next Generation. The updated jet is also expected to feature external nacelle chevrons for noise reduction, similar to those on the 787 and 747-8. While the 66 in (168 cm) fan will have a lower bypass ratio and higher specific fuel consumption (SFC) than the 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 737's airframe. The 66.1 in (168 cm) engine integrated on the airframe will offer an SFC improvement of 10–12% over the current 737NG CFM56-7B engine. Industry sources report that assessments are under way to revise the tail cone, natural laminar flow nacelle and a hybrid laminar flow vertical stabilizer for additional fuel burn and drag reduction.

LEAP-X

The LEAP-X incorporates technologies that CFM developed as part of the LEAP56 technology acquisition program, which CFM launched in 2005. The LEAP-X engine was officially launched on 13 July 2008. It is intended to be a successor to the CFM56-5B and CFM56-7B. Currently proposed for the LEAP-X is a greater use of composite materials, a blisk fan in the compressor, a second-generation Twin Annular Pre Swirl (TAPS II) combustor, a bypass ratio around 10-11:1, and 16% lower fuel consumption.

The manufacturer plans no modification in the flight deck as requested by customers  it wants to maintain commonality with the 737 Next Generation family. Boeing also plans to add more fly-by-wire systems but only for the spoiler. As production standard, the 737 MAX will feature the Boeing Sky Interior. The powerful appeal of the new interior comes from the most spacious cabin headroom, overhead bins that disappear into the ceiling yet carry more bags and LED lighting that brings any color into the cabin. based on the Boeing 787's interior, as well as blended winglets.

The Boeing 737 is the world's most popular and reliable commercial jet transport, with more than 9,000 orders to date. Boeing forecasts global demand for more than 23,000 airplanes in the 737's market segment over the next 20 years at a value of nearly $2 trillion.