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 737 MAX Design Changes

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pesawatnomer1
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PostSubject: 737 MAX Design Changes   Mon Apr 23, 2012 6:51 am

"The 737 MAX is on-track to deliver substantial fuel-savings to customers starting in 2017," said Beverly Wyse, vice president and general manager, 737 program. "We've made several design decisions that support the performance targets for the MAX and evolve the Next-Generation 737's design within the scope of the 737 MAX program."

Those design decisions include:

• Aft body aerodynamic improvements: The tail cone will be extended and the section above the elevator thickened to improve steadiness of air flow. This eliminates the need for vortex generators on the tail. These improvements will result in less drag, giving the aircraft better performance.

• Engine installation: The new CFM International LEAP-1B engines will be integrated with the wing similar to the aerodynamic lines of the 787 Dreamliner. A new pylon and strut, along with an 8-inch nose gear extension, will maintain similar ground clearance to today's 737 while accommodating the larger engine fan. The nose gear door design is altered to fit with this revision.

• Flight control and system updates: The flight controls will include fly-by-wire spoilers, which will save weight by replacing a mechanical system. The MAX will also feature an electronic bleed air system, allowing for increased optimization of the cabin pressurization and ice protection systems, resulting in better fuel burn.

Other minor changes to the aircraft include strengthening the main landing gear, wing and fuselage to accommodate the increase in loads due to the larger engines. Boeing will continue to conduct aerodynamic, engine and aircraft trade studies as the team works to optimise the design of the aircraft by mid-2013.

"We also continue to do work in the wind tunnel to affirm the low- and high-speed performance of the 737 MAX design," said Michael Teal, chief project engineer and deputy program manager, 737 MAX program. "Based on design work and preliminary testing results, we have even more confidence in our ability to give our customers the fuel savings they need while minimizing the development risk on this program."

A possible revision to the wing tips on the MAX is also being tested in the wind tunnel to see if this new technology could further benefit the aircraft.

To date, the 737 MAX has more than 1,000 orders and commitments from 16 customers worldwide.

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