Boeing 737 MAX: Difference between revisions
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As well as a 167cm (66in) fan on the CFM International Leap-X engine - increased from 157cm on the CFM56-7B, which powers the 737NG - the updated jet is also expected to feature external nacelle chevrons for noise reduction, similar to those featured on the 787 and 747-8. |
As well as a 167cm (66in) fan on the CFM International Leap-X engine - increased from 157cm on the CFM56-7B, which powers the 737NG - the updated jet is also expected to feature external nacelle chevrons for noise reduction, similar to those featured on the 787 and 747-8. |
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While Boeing's 167cm fan will have a lower bypass ratio and higher specific fuel consumption (SFC) than the 198cm Leap-X and 205cm Pratt & Whitney PW1100G engine options for the A320neo, the smaller engine will weigh less and create less drag on the 737's airframe. |
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According to one industry assessment of the engine's performance, the SFC improvement of a 167cm fan would offer around 13-14% over the 155cm CFM56-7B engine that powers the 737 today. Once integrated on to the aircraft it would deliver a fuel burn benefit of 10-12%. |
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A design shelved earlier this year, designated the 737RE, featured a 177cm fan, which required a 20cm nose gear extension to meet the required 43cm engine nacelle ground clearance, to avoid hitting taxiway lighting. (The 737 can accommodate up to a 170cm fan before requiring any changes to its landing gear.) <ref>http://www.flightglobal.com/articles/2011/08/30/361282/more-details-emerge-on-configuration-of-re-engined-737.html</ref> |
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==Variants== |
==Variants== |
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Revision as of 00:13, 31 August 2011
The Boeing 737 MAX is an upcoming family of aircraft produced by Boeing Commercial Airplanes. It is an upgrade to the successful Boeing 737 Next Generation family, with new CFM International LEAP-X1B engines.[clarification needed] The new variant will be first delivered in 2017.
Design and development
Boeing claims the 737 MAX will provide a 16% lower fuel burn than the current Airbus A320 and 4% lower than the future Airbus A320 NEO.[1] 496 order commitments have been signed for the 737 MAX, with 100 of them being by American Airlines.
As well as a 167cm (66in) fan on the CFM International Leap-X engine - increased from 157cm on the CFM56-7B, which powers the 737NG - the updated jet is also expected to feature external nacelle chevrons for noise reduction, similar to those featured on the 787 and 747-8. A fan of the proposed size would remove the need to modify the design of the landing gear, although Boeing declined official comment on the deliberations on fan size. While Boeing's 167cm fan will have a lower bypass ratio and higher specific fuel consumption (SFC) than the 198cm Leap-X and 205cm Pratt & Whitney PW1100G engine options for the A320neo, the smaller engine will weigh less and create less drag on the 737's airframe. According to one industry assessment of the engine's performance, the SFC improvement of a 167cm fan would offer around 13-14% over the 155cm CFM56-7B engine that powers the 737 today. Once integrated on to the aircraft it would deliver a fuel burn benefit of 10-12%. A design shelved earlier this year, designated the 737RE, featured a 177cm fan, which required a 20cm nose gear extension to meet the required 43cm engine nacelle ground clearance, to avoid hitting taxiway lighting. (The 737 can accommodate up to a 170cm fan before requiring any changes to its landing gear.) [2]
As production standard, the 737 MAX will feature the Boeing Sky Interior with 777-style overhead bins and LED-lighting, and blended winglets. [3]
Variants
- 737 MAX 7 - Replacement for the 737-700 and 737-700ER
- 737 MAX 8 - Replacement for the 737-800
- 737 MAX 9 - Replacement for the 737-900ER
See also
Related development
Aircraft of comparable role, configuration, and era
References
- ^ "Boeing Launches 737 New Engine Family with Commitments for 496 Airplanes from Five Airlines". Boeing. Aug. 30, 2011.
{{cite web}}: Check date values in:|date=(help) - ^ http://www.flightglobal.com/articles/2011/08/30/361282/more-details-emerge-on-configuration-of-re-engined-737.html
- ^ http://boeing.mediaroom.com/index.php?s=43&item=1908
External links
Boeing 737 MAX - NewAirplane.com
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