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Boeing 737 MAX program completes Firm Concept milestone; 13% fuel-use reduction

Boeing has finished defining in broad terms its newest single-aisle airplane, the 737 MAX, recently completing a major milestone in development known as “Firm Concept”.

The program has achieved this development milestone by defining the significant changes needed to deliver the performance we’ve committed to our customers. The team has a firm plan in place to incorporate all the changes necessary to realize a 13% fuel-use reduction within the scope and schedule of the program.

—Beverly Wyse, vice president and general manager 737 program

Fuel-use reduction changes include new LEAP-1B engines from CFM International, a redesigned tail cone and Advanced Technology winglets. Other changes allow these fuel-saving features to be integrated into the overall airplane design.

Boeing also decided to incorporate limited systems changes to the 737 MAX. These include an electronic bleed air system that will be supplied by Honeywell and large-format displays, supplied by Rockwell Collins, for the flight deck of the 737 MAX.

The 737 MAX flight deck will have four new large displays with significant growth capability while maintaining a common look-and-feel with the Next-Generation 737 display formats that preserves commonality with training across the 737 family.

The team also has defined the high-speed aerodynamic lines for the 737 MAX. Through analysis and testing conducted in high- and low-speed wind tunnels, the 737 MAX design team has further refined the geometric shape of the airplane, eliminating the need for the small bump on the nose-gear door that appeared in earlier design iterations.

With Firm Concept, the factory plan for the 737 MAX also has been defined. The factory plan includes a 737 MAX transition line where the initial 737 MAX airplanes will be assembled before integrating the new airplane into the existing 737 production lines in Renton, Wash.

The 737 MAX remains on track for first delivery in 2017. Now we are focused on the finer details of the configuration and we are confident we’ll be ready to begin detailed design in mid-2013.

—Michael Teal, chief project engineer, 737 MAX.



A 13% fuel consumption reduction over 30+ years is not much of an accomplishment?


Harvey D,

If you don't know what your talking about please hold your counsel. Remember the proverb "Better to be considered a possible reticent Fool, then to express your self, and remove all doubt".

The 737 Max is a final third revision and tweak. The 737 has been re-designed/improved in two previous major upgrade cycles. Major fuel economy improvements were made in those larger scale redesign cycles. This further 13% improvment is on top of and in addition to, previous fuel econmy improvements.

The next of the three improvement revisions is represented by the current 737 Max program.

A totally new 737 replacemnt program is already fully underway. But it scope is much alrger, and availability will not be until a decade from now. The 737 max is at best a limited interim improvment project, to smooth the transition to a fully new next generation 737 program.



Don't insult people. This is a forum for open discussion, bullies have been known to be cowards.

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