Title: Boeing 737 Next Generation Content:  The Boeing 737 Next Generation, often called the 737NG, is a family of Boeing 737s. The 737-600, -700, -800 and -900 are all 737NG aircraft. It is the third family of Boeing 737. The family which came before it is the 737 Classic (−300/-400/-500) family. They have been made since 1991 by Boeing Commercial Airplanes. All 737s are twin-engined, narrow-body airliners. This means that they all have two engines and only have one aisle between seats. 4,293 737NG aircraft have been delivered (as of December 2012). More than 6,300 have been ordered by airlines."737 Model Orders and Deliveries data." Boeing, March 2011. Retrieved April 19, 2011."Boeing Delivers 100th Next- Generation 737-900ER." Kompas.com. Retrieved November 23, 2011. Southwest Airlines has more 737NGs than any other airline. Ryanair, a low-cost airline from Ireland, also has a lot of 737NGs. The only planes Ryanair has are 737-800s. The main rival of the 737NG family is the Airbus A320 family. The Boeing 737 MAX will eventually replace the 737NG. == Design and development == === Background === After Airbus launched the Airbus A320, Boeing started designing a new series of Boeing 737. The 737 Next Generation (NG) program was announced on November 17, 1991. Boeing made many changes from the 737 Classic. The wing was changed. These changes made its area bigger by 25%. The wingspan was made bigger by 16 ft (4.88 m). These changes meant that it could carry 30% more fuel. CFM56-7B engines were used.Endres 2001, p. 133. These improvements allowed the 737 to fly 900 nmi farther. === Inside === The inside of the 737 Next Generation was better than the style used on the Boeing 757-200 and the Boeing 737 Classic. It used certain parts of the Boeing 777's inside style. The style of the 737 Next Generation was made the usual style of the Boeing 757-300. In 2010, the inside of the 737NG was changed to look like the Boeing 787 Dreamliner. The new design was called the Boeing Sky Interior. The Sky Interior can only be put into new aircraft. However, a different company has made a style for 737 and 757 aircraft which looks like the Sky Interior."Heath Tecna to unveil Project Amber for B737s and B757s." Northwest Business Monthly, 2011. Retrieved December 27, 2011. === Making and testing === The first 737NG was a 737−700. The prototype −800 was finished on June 30, 1997 and first flew on July 31, 1997. The smallest 737NG, the 737−600 series, is the same size as the −500. The FAA said it was allowed to fly on August 18, 1998.Shaw 1999, pp. 14–15. === Further developments === left|thumb|Scandinavian Airlines 737-800 taking off In July 2008, Boeing brought out new brakes for 737NGs. They are supposed to replace the steel brakes. They will make the brakes lighter. less weight on a Boeing 737-800 means that 0.5% less fuel will be burned. Delta Air Lines got the first 737NG with these brakes. The plane was a 737-700."Boeing Next-Generation 737 Carbon Brakes Earn FAA Certification." Boeing Press Release, August 4, 2008. Retrieved August 30, 2009. On August 21, 2006, Sky News said that some 737NGs had faulty parts. The report said that Boeing had found some parts of the plane to be faulty, but they did not fix it. Boeing said that these statements were "without merit"."Report alleges faulty parts in jets." United Press International, August 21, 2006. Retrieved August 22, 2006. This means that Boeing thinks Sky News is wrong. However, another show looked at 737NGs and also thought that some things were faulty.Al Jazeera English "Boeing Safety Claims Investigated." youtube.com, December 15, 2010. ==Replacement== Since 2006, Boeing has been thinking about replacing the 737 with a completely new design."Boeing firms up 737 replacement studies by appointing team." Flight International, March 3, 2006. Retrieved April 13, 2008. On July 20, 2011, Boeing said it would make a new version of the 737. It would have the CFM International LEAP-X engine. American Airlines said it would order 100 of these planes."Boeing and American Airlines Agree on Order for up to 300 Airplanes". Boeing, July 20, 2011. Retrieved November 1, 2011. The Boeing 737 MAX was finished in 2016Ostrower, Jon. "Boeing close to re-engined 737 fan size decision." Air Transport Intelligence news via FlightGlobal.com, August 18, 2011. Retrieved August 20, 2011. On August 30, 2011, Boeing said it would definitely make this new plane. They called it the Boeing 737 MAX.Boeing 737 MAX. NewAirplane.com The CFM International LEAP-1B engines that it will use burns 16% less fuel than the Airbus A320."Boeing Launches 737 New Engine Family with Commitments for 496 Airplanes from Five Airlines." boeing.mediaroom.com, August 30, 2011."Boeing officially launches re-engined 737." flightglobal.com, August 30, 2011.Board Approves Re-Engined 737&channel;=comm "Boeing Board Approves Re-Engined 737." Aviation Week, August 30, 2011. The 737 MAX's main rival is the Airbus A320neo family. ==Variants== ===737-600=== The 737-600 replaced the 737-500. Its main rival is the Airbus A318. 69 737-600s have been made. As of 2012, Boeing has taken the 737-600 out of its list of prices. This might mean that the 737-600 is not being made anymore. ===737-700=== The 737-700 replaces the 737-300. It began being used in 1998."Boeing 737-600/700." airliners.net. Retrieved February 4, 2008. Its main rival is the Airbus A319. Southwest Airlines has the most 737-700s. They have more than 400 of them. The 737-700C is a version where the seats can be taken out to carry cargo instead. There is a big door on the left of the aircraft. The United States Navy got the first 737-700C. The Navy planes are called the C-40 Clipper."U.S. Naval Reserve Gets First Look at Newest Class of Aircraft." DefenseLink (U.S. Department of Defense). Retrieved January 21, 2008. ====737-700ER==== The 737-700ER ("ER" means "extended range") came out on January 31, 2006."Boeing Launches Longest-Range 737 with ANA." It can fly for ."Boeing 737-700ER Technical Information". Boeing The 737-700ER's main rival is the Airbus A319LR. ===737-800=== The 737-800 is a longer version of the 737-700. It replaces the 737-400. For many airlines in the United States, the 737-800 replaced Boeing 727-200s. The 737-800 is one of the planes which replaces the McDonnell Douglas MD-80. It burns of fuel every hour. That is about 80% less fuel than an MD-80.Wallace, James. "Aerospace Notebook: MD-80 era winding down as fuel costs rise." Seattlepi.com, June 24, 2008. Retrieved August 30, 2009. On August 14, 2008, American Airlines said it was ordering 26 737-800s."Boeing, American Airlines Finalize Deal for 26 Next- Generation 737s." Boeing Press Release, August 14, 2008. Retrieved August 30, 2009. 2,135 -800s have been delivered. The 737-800's main rival is the Airbus A320. ===737-900=== thumb|right|Alaska Airlines Boeing 737-900 The 737-900 is the longest 737 ever made. Alaska Airlines got the first -900 on May 15, 2001. The 737-900 has the same MTOW as the −800. It also does not carry any more fuel. The 737-900 can carry more luggage but cannot fly as far. This meant that it could not be a rival to the Airbus A321. ====737-900ER==== The 737-900ER ("ER" for "extended range") is the newest Boeing 737. It was made to replace the 757-200. It was also made to be a rival to the Airbus A321. thumb|left|A Lion Air 737-900ER The 737-900ER can carry more fuel than other 737s. It also has winglets. The first 737-900ER was finished on August 8, 2006. Lion Air got the first 737-900ER on April 27, 2007. Lion Air has ordered 166 737-900ERs as of August 2011. On August 22, 2011, it was said that Delta Air Lines ordered 100 737-900ERs. That is the biggest single order for this type of 737."Air Transport Intelligence news: Delta to cap its narrowbody order at 100 737-900ERs." Flightglobal, August 22, 2011. Retrieved August 22, 2011. ==Users== As of July 2010, 3,119 Boeing 737 Next Generation planes are being used by airlines. There are 62 -600s, 1,019 -700s, 1,915 -800s and 123 -900s."World Airliner Census". Flight International, pp. 26–49. August 24–30, 2010. ==Orders and deliveries==  Sources: Boeing 737 Specifications,Boeing 737 Technical Information, Boeing Commercial Airplanes. 737 Airport Planning ReportBoeing 737 Airplane Characteristics for Airport Planning, Boeing Commercial Airplanes. ==Related pages==