Boeing 737 MAX: Difference between revisions
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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#New_Engine_Option|Airbus A320 NEO]].<ref>{{cite web |url= http://boeing.mediaroom.com/index.php?item=1907 |title= Boeing Launches 737 New Engine Family with Commitments for 496 Airplanes from Five Airlines |date= Aug. 30, 2011 |publisher= [[Boeing]]}}</ref> 496 order commitments have been signed for the 737 MAX, with 100 of them being by [[American Airlines]].<ref>http://boeing.mediaroom.com/index.php?s=43&item=1845</ref> |
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#New_Engine_Option|Airbus A320 NEO]].<ref>{{cite web |url= http://boeing.mediaroom.com/index.php?item=1907 |title= Boeing Launches 737 New Engine Family with Commitments for 496 Airplanes from Five Airlines |date= Aug. 30, 2011 |publisher= [[Boeing]]}}</ref> 496 order commitments have been signed for the 737 MAX, with 100 of them being by [[American Airlines]].<ref>http://boeing.mediaroom.com/index.php?s=43&item=1845</ref> |
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The 167 cm (66 in) diameter fan on the CFM International Leap-X engine is increased from 157 cm of the CFM56-7B engine on the [[Boeing 737 Next Generation]]. The 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 landing gear design. While 167 cm (66 in) 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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A former design effort, called the "737RE", featured a 177cm (69.68 in) fan, but it would need a 20 cm nose gear extension to reach the required ground clearance of the engines. (The 737 can have a fan up to 170cm without any changes to its gears.) |
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According to sources about the engine's performance, the SFC improvement of a 167 cm fan would offer around 13-14% over the current 155 cm CFM56-7B engine on the 737, but as integrated on the airframe it would give an improvement of 10-12%. The so called 737RE-design wich was shelved earlier this year, worked with a 177 cm fan, that would require a 20 cm nose gear extension to meet the ground clearance. (The 737 can accommodate up to a 170 cm without changes to its nose gear.) Industry sources say that assessments are under way to revise the tail cone, natural laminar flow nacelle and a hybrid laminar flow vertical stabiliser for additional fuel burn and drag reduction.<ref>{{cite web | url= http://www.flightglobal.com/articles/2011/08/30/361282/more-details-emerge-on-configuration-of-re-engined-737.html |title= More details emerge on configuration of re-engined 737 |date= Aug. 30, 2011 |publisher= [[Flightglobal]]}}</ref> |
According to sources about the engine's performance, the SFC improvement of a 167 cm fan would offer around 13-14% over the current 155 cm CFM56-7B engine on the 737, but as integrated on the airframe it would give an improvement of 10-12%. The so called 737RE-design wich was shelved earlier this year, worked with a 177 cm fan, that would require a 20 cm nose gear extension to meet the ground clearance. (The 737 can accommodate up to a 170 cm without changes to its nose gear.) Industry sources say that assessments are under way to revise the tail cone, natural laminar flow nacelle and a hybrid laminar flow vertical stabiliser for additional fuel burn and drag reduction.<ref>{{cite web | url= http://www.flightglobal.com/articles/2011/08/30/361282/more-details-emerge-on-configuration-of-re-engined-737.html |title= More details emerge on configuration of re-engined 737 |date= Aug. 30, 2011 |publisher= [[Flightglobal]]}}</ref> |
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Revision as of 01:21, 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-1B engines and possible further modifications to the airframe. The new variant will be first delivered in 2017.[1]
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.[2] 496 order commitments have been signed for the 737 MAX, with 100 of them being by American Airlines.[3]
The 167 cm (66 in) diameter fan on the CFM International Leap-X engine is increased from 157 cm of the CFM56-7B engine on the Boeing 737 Next Generation. The 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 landing gear design. While 167 cm (66 in) 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.
A former design effort, called the "737RE", featured a 177cm (69.68 in) fan, but it would need a 20 cm nose gear extension to reach the required ground clearance of the engines. (The 737 can have a fan up to 170cm without any changes to its gears.)
According to sources about the engine's performance, the SFC improvement of a 167 cm fan would offer around 13-14% over the current 155 cm CFM56-7B engine on the 737, but as integrated on the airframe it would give an improvement of 10-12%. The so called 737RE-design wich was shelved earlier this year, worked with a 177 cm fan, that would require a 20 cm nose gear extension to meet the ground clearance. (The 737 can accommodate up to a 170 cm without changes to its nose gear.) Industry sources say that assessments are under way to revise the tail cone, natural laminar flow nacelle and a hybrid laminar flow vertical stabiliser for additional fuel burn and drag reduction.[4]
Bob Feldmann will be the vice president and general manager of the 737 MAX-family. He has 35 years of aerospace experience, and most recently led the Surveillance and Engagement division within Boeing Military Aircraft. That includes several commercial derivative programs based on the Boeing 737: he has been in role of the development of programs as the EA-18G Growler and the P-8A Poseidon.
Michael Teal will be the vice president, chief project engineer and deputy program manager for the 737 MAX program. He's most recent role was vice president and chief project engineer on the 747-8 program, where he was in role of managing the airplane's configuration, integration, performance, safety, test and certification.[5]
As production standard, the 737 MAX will feature the Boeing Sky Interior with overhead bins and LED-lighting based on the Boeing 787's interiors[6], and also blended winglets.[7]
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) - ^ "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://boeing.mediaroom.com/index.php?s=43&item=1845
- ^ "More details emerge on configuration of re-engined 737". Flightglobal. Aug. 30, 2011.
{{cite web}}: Check date values in:|date=(help) - ^ "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.boeing.com/news/frontiers/archive/2009/june/i_ca01.pdf
- ^ "Boeing Introduces 737 MAX With Launch of New Aircraft Family - Aug 30, 2011". Boeing. Aug. 30, 2011.
{{cite web}}: Check date values in:|date=(help)
External links
Boeing 737 MAX - NewAirplane.com
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