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Advanced Blended / Advanced Technology Winglets

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Winglets

The most noticeable feature to appear on 737s are thewinglets. These are wing tip extensions which reduce lift

induced drag and provide some extra lift. They have beencredited to Dr Louis Gratzer formerly Chief ofAerodynamics at Boeing and now with Aviation PartnersBoeing (APB). They were first flown on a 737-800 in June1998 as a testbed for use on the BBJ. They are now availableas a standard production line option for all NGs with theexception of the -600 series. They are also available as aretrofit from APB. They are 8ft 2in tall and about 4 feet wideat the base, narrowing to approximately two feet at the tipand add almost 5 feet to the total wingspan. The winglet forthe Classic is slightly shorter at 7ft tall. Over half of all

737NGs have had winglets retrofitted.

Boeing has now developed, built and will be installing theirown winglets for the 737 MAX family. The "AdvancedTechnology" winglet combines rake tip technology with adual feather winglet concept into one advanced treatment forthe wings of the 737 MAX.". They will be split-tipped,straight-edged winglets for the 737 NAX (see photo below).

The latest development, which was available from early2014, is the split-scimitar winglets for the 737 NG from APB

All of theinformation,photographs &schematics fromthis website andmuch more isnow available in a370 page printedbook or EPUBavailable here.

*** Updated 02Jul 2014 ***
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roduction.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/index.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/site_map.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/737links.htmhttp://www.b737.org.uk/production.htmhttp://www.b737.org.uk/rudder.htmhttp://www.b737.org.uk/sales.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/flightdeckphotos.htmhttp://www.b737.org.uk/accident_reports.htmhttp://www.b737.org.uk/techspecsdetailed.htmhttp://www.b737.org.uk/history.htmhttp://www.b737.org.uk/newsreports.htmhttp://www.b737.org.uk/techphotos.htmhttp://www.b737.org.uk/pilotnotes.htmhttp://www.b737.org.uk/quiz.htmhttp://www.b737.org.uk/aircraftsystems.htmhttp://www.b737.org.uk/book.htmhttp://www.b737.org.uk/winglets.htmhttp://www.b737.org.uk/index.htm


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Search this

website:

737-200 Mini-Winglets

737 NG Production Winglets

737 MAX Advanced Technology Winglets

737 NG Split Scimitar Winglets

News stories
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Winglets are also available for Classics. The first winglet equipped 737-300 flew in Nov 2002and gained its FAA supplemental type certificate (STC) on 30 May 2003. Winglet equippedClassics are known as Special Performance (SP).


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Winglets have the potential to give the following benefits:

Improved climb gradient. This will enable a higher RTOW from climb limited airports (hot, high

or noise abatement) or obstacle limited runways.

Reduced climb thrust. A winglet equipped aircraft can typically take a 3% derate over the non-

winglet equivalent aircraft. This can extend engine life and reduce maintenance costs. Environmentally friendly. The derate, if taken, will reduce the noise footprint by 6.5% and NOx

emissions by 5%. This could give savings on airport noise quotas or fines.

Reduced cruise thrust. Cruise fuel flow is reduced by up to 6% giving savings in fuel costs and

increasing range.

Improved cruise performance. Winglets can allow aircraft to reach higher levels sooner. Air

Berlin notes, Previously, we'd step-climb from 35,000 to 41,000 feet. With Blended Winglets,

we can now climb direct to 41,000 feet where traffic congestion is much less and we can take

advantage of direct routings and shortcuts which we could not otherwise consider.

Good looks. Winglets bring a modern look and feel to aircraft, and improve customers'

perceptions of the airline.

If winglets are so good, you may wonder why all 737s dont have them. In fact 85% of all new

737s are now built with winglets, particularly the 800 and 900 series and of course all BBJs. Itcomes down to cost versus benefits. Winglets cost about $725,000USD and take about 1 week toinstall which costs an extra $25-80,000USD. Once fitted, they add 170-235kg (375-518lbs) tothe weight of the aircraft, depending upon whether they were installed at production or a retrofit.The fuel cost of carrying this extra weight will take some flying time each sector to recover,although this is offset by the need to carry less fuel because of the increased range. In simpleterms, if your average sector length is short (less than one hour) you wont get much the benefitfrom winglets - unless you need any of the other benefits such as reduced noise or you regularlyoperate from obstacle limited runways.

There is a small difference in rotation rate for aircraftwith winglets installed and, as a result, the crew needsto be cautious of pitch rate. There is approximately a unit take-off trim change between non-winglet andwinglet aircraft so the green band is slightly differentfor winglet aircraft. Finally, the dry maximumdemonstrated crosswind limit is slightly reduced withwinglets to 34kts. According to APB this is becausethe FAA will only let us document the max winds

experienced during flight test... so if we had been able

to find more crosswind, then the 33kts might have been

more. There appears to be no weather cocking effectdue to winglets.


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Other wingletNews Stories

An excellent article by Boeing in Aero 17 is available at:

http://www.boeing.com/commercial/aeromagazine/aero_17/winglet_story.html

Next-Generation 737 Production Winglets

DescriptionWinglets are wing tip extensions which provide several benefits to airplane operators. Thewinglet option increases the Next-Generation 737's lead as the newest and most technologicallyadvanced airplane in its class. These new technology winglets are now available on 737-800s aswell as on the Boeing Business Jet (737-700 and 737-800).

There are two types of winglet available, Boeing's own built into the wing at the time ofmanufacture and the APB winglet as a retrofit.

Benefits

Depending on the airplane, its cargo, the airline's routes and other factors, winglets have the potential

to give:

IMPROVED TAKEOFF PERFORMANCE

By allowing a steeper climb, winglets pay off in better takeoff performance, especially fromobstacle-limited, high, hot, weight-limited, and/or noise-restricted airports. PerformanceImproved climb gradients increase 737-800 allowable takeoff weight (TOW).
http://www.b737.org.uk/winglets.htm#Newsstorieshttp://www.b737.org.uk/winglets.htm#Newsstorieshttp://www.b737.org.uk/winglets.htm#Newsstorieshttp://www.boeing.com/commercial/aeromagazine/aero_17/winglet_story.htmlhttp://www.boeing.com/commercial/aeromagazine/aero_17/winglet_story.htmlhttp://www.boeing.com/commercial/aeromagazine/aero_17/winglet_story.htmlhttp://www.boeing.com/commercial/aeromagazine/aero_17/winglet_story.htmlhttp://www.boeing.com/commercial/aeromagazine/aero_17/winglet_story.htmlhttp://www.b737.org.uk/winglets.htm#Newsstories


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Some examples include:

Chicago-Midway: ~1,600 lb additional TOW

Lanzarote (Canary Islands): ~3,500 lb additional TOW

Albuquerque, Denver, and Salt Lake City: ~4,400 lb additional TOW

REDUCED ENGINE MAINTENANCE COSTS

Better climb performance also allows lower thrust settings, thus extending engine life andreducing maintenance costs. Lower Required Thrust Levels Extend On-Wing Life.

Takeoff - Winglets allow up to 3% incremental derate.

Cruise - Cruise thrust levels are reduced by up to 4%.

FUEL SAVINGS

Winglets lower drag and improve aerodynamic efficiency, thus reducing fuel burn. Dependingon the missions you fly, blended winglets can improve cruise fuel mileage up to 6 percent,especially important during a time of rising fuel prices.

INCREASED PAYLOAD RANGE

The addition of Aviation Partners Blended Winglets to the 737 Next Generation hasdemonstrated drag reduction in the 5 to 7% range that measurably increases range and fuelefficiency . In addition, the Blended Winglets allow the 737-NG to take off from higher, hotterairports with increased payload.

SeriesRange (nm)

Normal

Range (nm) With

Winglets

-700 3250 3634

-800 2930 3060

-900 2670 2725

ENVIRONMENTALLY FRIENDLY

With winglets, you can be a good neighbour in the community you serve. They enhanceperformance at noise-restricted airports and cut the affected area by 6.5 percent, saving youmoney on airport noise quotas or fines. By reducing fuel consumption, winglets help lower NOx


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emissions by 5%.

IMPROVED OPERATIONAL FLEXIBILITY

By increasing Payload Range and Overall Performance, Blended Winglets add flexibility to fleet

operations and route selection. Air Berlin notes, "Previously, we'd step-climb from 35,000 to41,000 feet. With Blended Winglets, we can now climb direct to 41,000 feet where trafficcongestion is much less and we can take advantage of direct routings and shortcuts which wecould not otherwise consider."

MODERN DRAMATIC APPEARANCE

Blended Winglets bring a modern look and feel to aircraft, and improve customers' perceptionsof the reliability and modernity of the Airline.

DimensionsEach winglet is 8 feet long and 4 feet in width at the base, narrowing to approximately two feetat the tip.

Added wingspanWinglets add approximately 5 feet to the airplane's total wingspan - from 112 feet 7 inches to117 feet 2 inches. (All Next-Generation 737 models have the same wingspan.)

WeightEach winglet weighs about 132 pounds. Increased weight to the airplane for modifying wing andinstalling winglets is about 480 pounds.

Airplane provisionsStructural modifications to accommodate the winglet include strengthening the wing's centresection and other internal strengthening on the wing. These enhancements are done in the normalproduction process. Various systems changes have also been made to accommodate wingletinstallation.

OfferabilityProduction and retrofit winglets for the Next-Generation 737s are available through Boeing(production) and Aviation Partners Boeing (retrofit). Aviation Partners Boeing (APB) is a jointventure partnership between Boeing and Aviation Partners Inc. (API).

CertificationRetrofit FAA Supplemental Type Certificate (STC) was granted to APB on 3/23/2001. LBA(German regulatory agency) STC was granted to APB on 5/4/2001. JAA STC was granted May2001. Boeing PLOD (program letter of definition) was granted 5/9/2001 by both the FAA andJAA for Boeing production.

Availability


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737-700, 737-800, 737-900, 737-BBJ - available now. Deliveries began May 2001. Initialcustomers included: South African Airways, Air Berlin, American Trans Air, PolynesianAirlines, and Hainan Airlines - both through direct purchase and leasing options via ILF, GATX,GE Capital Corp., and Flightlease.

Operational ConsiderationsThere is a small difference in rotation rate for airplanes with winglets installed and, as a result,the crew needs to be cautious of pitch rate. There is also approximately a unit take-off trimchange between non-winglet and winglet aircraft so the green band is slightly different forwinglet aircraft.

737-200 Mini-

Winglets

This is a 737-200Adv, L/N 628,fitted with mini-winglets. This ispart of the QuietWing Corp flapmodification kitwhich gained itsFAA certificationin 2005. Thepackage includes

drooping the TEflaps by 4 degreesand the ailerons by1 degree toincrease to camberof the wing.Benefits include:

Payload

Increase of up to 5,000 lbs.

Range Increase up to 3%

Fuel Savings up to 3% Improved Takeoff/Landing Climb Gradients

Reduced Takeoff/Landing Field Length

Improved High Altitude Takeoff/Landing Capability

Improved Hot Climate Performance

Reduced Stall Speeds by 4-5kts

Photo: Julian Whitelaw


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737 MAX Advanced Technology (AT) Winglets

Boeing has now developed, built and will be installing their own winglets for the 737 MAXfamily. The "Advanced Technology" winglet combines rake tip technology with a dual feather

winglet concept into one advanced treatment for the wings of the 737 MAX.".


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The AT Winglets measure 8 feet from root to top of winglet and a total of 9 feet 7 inches frombottom of lower tip to top of higher tip. The top portion is 8 feet 3 inches and the bottom portionis 4 feet 5.8 inches. The ground clearance of the bottom tip is 10 feet 2 inches.

Boeing claim they will give 1.5% fuel burn improvement over current technology winglets. Theyexplain this as follows:"The AT winglet further redistributes the spanwise loading, increasing theeffective span of the wing. The AT winglet balances the effective span increase uniquelybetween the upper and lower parts and therefore generates more lift and reduces drag. Thismakes the system more efficient without adding more weight."


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This graphic from Boeing shows from top to bottom, a non-winglet aircraft, a current blendedwinglet and an AT winglet. The AT winglet has a more even lift profile across its span.

737 NG Split Scimitar Winglets


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Split Scimitar Winglets are offered by APB for the 737-800 and 737-900ER and came intoservice in early 2014. They are available as a retrofit to existing winglet aircraft. APB expect to

be able to offer the retrofit to all of the 737NG range by the end of 2015.

A set of SSWs weigh 133kg (294Lb) per aircraft but give fuel savings of 1.6% on sectors of1000nm rising to 2.2% on sectors of 3000nm. This equates to an extra 65nm range.

The modifiocation requires a trailing edge wedge, strengthened stringers and ballast weight butno changes to any avionics or the FMC. The base price cost for an upgrade from brlendedwinglets to SSWs was $555,000 as of 2014.

A United Airlines Boeing 737-800 retrofitted with new split scimitar winglets has performed itsmaiden test flight. The Boeing 737-800 with the new split scimitar winglet design similar to

that to be used on the Boeing 737 MAX family made its first test flight on July 16, from PaineField in Everett, Washington.

The first United Airlines Boeing 737-800 fitted with new split scimitar winglets from AviationPartners Boeing takes off on its maiden test flight on July 16, 2013. The aircraft flew fromPained Field in Everett, Washington According to United Airlines, the new winglet designimproves on the existing blended winglets currently fitted to the carriers Boeing 737NG fleet. In

January, United served as the launch customer for the new split scimitar winglet when it made a


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firm commitment with Aviation Partners Boeing to retrofit its Boeing 737-800 fleet. In June,United announced it would also retrofit its Boeing 737-900ER fleet.

United Airlines program to retrofit its Boeing 737-800s and 737-900ERs with split scimitarwinglets consists of replacing each existing blended winglet aluminum winglet tip cap with a

new aerodynamically shaped Scimitar winglet tip cap and adding a new Scimitar-tippedventral strake Using a newly patented design, the program consists of retrofitting Uniteds

Boeing 737NG blended winglets by replacing the aluminum winglet tip cap with a newaerodynamically shaped Scimitar winglet tip cap and adding a new Scimitar-tipped ventralstrake. We are always looking for opportunities to reduce fuel expense by improving the

efficiency of our fleet. The Next-Generation 737 Split Scimitar Winglet will provide a naturalhedge against rising fuel prices while simultaneously reducing carbon emissions, says RonBaur, vice president of fleet for United Airlines. According to United, the new winglet designdemonstrates significant aircraft drag reduction over the basic blended winglet configurationUnited uses on its current fleet. United expects the new split scimitar winglet to result inapproximately a 2 per cent fuel saving for any 737NG fitted with it.

The new split scimitar winglets with which United Airlines is retrofitting its Boeing 737-800 and737-900ER fleets look similar to the winglets which feature on the new Boeing 737 MAXfamily. United estinates each set of split scimitar winglets will reduce by 2 per cent the fuel burnof any Boeing 737NG on which they are installed Once the split scimitar winglets are installed,United expects the winglet technologies installed on its 737NG, 757, and 767-300ER fleets tosave it more than $200 million per year in jet fuel costs. United will begin retrofitting its 737-800and 737-900ER fleets with the new winglets beginning early next year, once testing and FAAcertification of the winglets are complete.

News Stories

03 Dec 2013 - Boeing selects GKN to build 737 MAX advanced technology winglet

LONDON, December 3, 2013Boeing [NYSE: BA] has selected GKN plc to manufacture theAdvanced Technology Winglet for the 737 MAX. Production of the winglets will take place at

the GKN site at Cowes on the Isle of Wight in the United Kingdom with final assembly atGKN's facility in Orangeburg, South Carolina. Already a market success, the 737 MAX hasmore than 1,600 orders from airlines around the world. We announced our first wingletcontracts for Boeing aircraft in 2007 and this award reflects the on-going success of our growingrelationship, said Marcus Bryson, CEO, GKN Aerospace and Land Systems. It also draws on

our expertise in the efficient manufacture of complex composite and metallic wing structures andmakes full use of our ability to assemble this advanced structure. We are extremely proud to bepart of the team that is producing this unique winglet - and to be involved with Boeing in


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creating this extremely efficient next-generation airframe." Boeings newest family of single-aisle aircraft, the 737 MAX will build on the Next-Generation 737s popularity and reliabilitywhile delivering to customers unsurpassed fuel efficiency in the single-aisle market.Development of the 737 MAX is on schedule with firm configuration achieved in July 2013.First flight is scheduled in 2016 with deliveries to customers beginning in 2017. GKN will

deliver the first developmental winglet ship sets to Boeing in 2015. UK Business MinisterMichael Fallon said "This significant deal creates and secures hundreds of high skilled, long termengineering jobs on the Isle of Wight and across GKN's domestic supply chain. It also furtherstrengthens the ties between Boeing and the UK, showing that this country can continue to be thesupplier of choice to the world's leading aircraft manufacturers. That's why the Government isworking in partnership with industry to deliver jobs and growth through our industrial strategy."Boeings Advanced Technology Winglet is one of a number of design updates that will result inless drag and further optimize the 737 MAX performance, especially on longer-range missions.In total these updates will deliver an 8 percent per-seat operating cost advantage over futurecompetition.1 Boeing is pleased that this agreement will build on our existing strongrelationship with GKN, said Sir Roger Bone, President of Boeing in the UK. As Boeing

celebrates 75 years of partnership with the UK in 2013, this agreement helps to ensure that ourstrong relationship with the UK aerospace industry continues for many years to come. Twosuppliers are manufacturing winglets for the 737 MAX programme, GKN and Korean AirAerospace Division (KAL-ASD) in South Korea.

13 Aug 2013 - Latest in fuel efficiency: Split Scimitar winglet for 737s now in testing

Its going to beharder than anticipated to distinguish Boeings planned 737 Max series from thecurrent Next Generation 737s, based on the two models wingtips.

Take a look at the photo at right showing the wingtips of aUnited Airlines737. These two-partSplit Scimitar Winglets are now undergoingFederal Aviation Administrationcertification testingat Grant County International Airport at Moses Lake, Wash.

The Split Scimitar Winglets project both up and down, an advance that Aviation Partners Boeingclaims will add at least 2 percent in fuel efficiency to 737 Next Generation models.

But wait!

A distinguishing feature of the planned future 737 Max is advanced technology winglets, as

shown in the second image (an artist's rendering), which also split at the end of the wing, withone fin pointing up and another pointing down, also to increase fuel economy.

Boeing claims its new advanced technology winglets will add another 1.5 percent increase infuel efficiency; it's already claiming a 10 percent to 12 percent increase for the 737 Max's newengines.

These subtle increases in fuel efficiency are significant in the heated battle between Boeing and
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competitor Airbus over orders for their competing re-engined models of their narrow bodyaircraft, the 737 Max and A320neo, respectively.

The retrofitted winglets also are important for carriers in their own cost-cutting efforts. AviationPartners estimates the Scimitar winglets will save United Airlines, its first customer, 57,000

gallons of fuel a year for each 737-900 ER.

The two winglet models, which are visually very different from the up-swept blended wingletsnow common on 737s, are hard to tell apart.

A few clues are that the Split Scimitar wingtips are essentially add-ons to the blended winglets,so the lower portion is decidedly smaller than the original upturned swept winglets, and bothfeature extended tips with what the maker calls the scimitars.

The advanced-technology winglets planned for the 737 Max are more symmetrical and do nothave the extended scimitar tips.

Tracing the lineage of the two models is nearly as complex.

Aviation Partners Boeingis a joint venture betweenBoeing CommercialAirplanes division andAviation Partners Inc. that was formed to sell and market the original blended winglets.

That joint venture has been enormously successful, and has sold and installed its original blendedwinglets on more than 4,000 737 NGs (Next Generation). These days, nearly every new 737 NGrolls off the Renton line with the blended winglets already installed.

The new split-wingtip designs evolved through a combination of independent engineering and

collaboration between Boeing and Aviation Partners, although its hard to tell how much iswhich.

APB didnt participate in the Boeing design, and the Boeing designers didnt participate inAPBs, saidBill Ashworth,CEO of Aviation Partners Boeing. The APB design was approvedby Boeing engineers, and they participated in evaluation of the test data. They also looked at thedesign technically, and said its a good design.

So while Boeing will be using its own advanced technology winglet on future 737 Max aircraft,Aviation Partners Boeing already has landed 455 firm orders and options for its Split ScimitarWinglets, and expects to get a lot more. These winglets are being purchased by airlines such as

United, to be retrofitted onto the wings of existing aircraft.

"This will add additional work for us, were glad to have it, Ashworth said. Were going to

increase staffing levels to handle it, but its great work, and customers are very excited about it.

The Aviation Partners Boeing winglets are fabricated in Austria, although they are designedhere.
http://www.aviationpartnersboeing.com/index.phphttp://www.aviationpartnersboeing.com/index.phphttp://www.bizjournals.com/profiles/company/us/il/chicago/boeing_co/1325088http://www.bizjournals.com/profiles/company/us/il/chicago/boeing_co/1325088http://www.bizjournals.com/profiles/company/us/il/chicago/boeing_co/1325088http://www.b737.org.uk/seattle/search/results?q=Bill%20Ashworthhttp://www.b737.org.uk/seattle/search/results?q=Bill%20Ashworthhttp://www.b737.org.uk/seattle/search/results?q=Bill%20Ashworthhttp://www.b737.org.uk/seattle/search/results?q=Bill%20Ashworthhttp://www.bizjournals.com/profiles/company/us/il/chicago/boeing_co/1325088http://www.aviationpartnersboeing.com/index.php


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The testing at Moses Lake is being handled by Aerospace Testing Engineering and CertificationLLC, which has leased 23,000 square feet there, according toPat Jones,executive director of thePort of Moses Lake.

11 Aug 2012 - Boeing Designs Advanced Technology Winglet for 737 MAX

Aviation Partners has started showing airlines a split-tip winglet with blended, "scimitar"-edgedfeathers as a retrofit option that the joint venture estimates can reduce fuel consumption by 2.5 to3% on next-generation 737s. The move precedes a launch decision by the board of directors ofthe Aviation Partners Boeing (APB) joint venture, but that approval should come "shortly", saysJoe Clark, founder of Aviation Partners, the Seattle-based firm that designed the standardblended winglet ordered on more than 4,600 737NGs. Aviation Partners unveiled the scimitar-edged winglet last October and launched flight tests on a 737 Boeing Business Jet in April,which confirmed the estimates of computational fluid dynamics models to within one-tenth of a

percentage point, Clark says. "We are very pleased with what we've achieved," he adds. WhileAPB prepares to offer a scimitar-edged split-tip winglet on the 737NG, Boeing is readying astraight-edged split-tip winglet on the 737 Max.

Both companies claim to have arrived on the split-tip configuration for the 737 at nearly thesame time by coincidence. Aviation Partners had no prior knowledge of Boeing's "dual-feather"split-tip winglet for the 737 Max, and has received no information on the design from its jointventure partner, Clark says. For its part, Boeing also was unaware of the Aviation Partnersdesign when it began working on the Advanced Technology (AT) winglet around June 2011,says Robb Gregg, a chief aerodynamicist for the 737 Max. "As I was looking at theconfiguration, we needed to get more performance out of it and really the only place we hadn't

spent a lot of time was looking at the [wing]-tip," Gregg says. Boeing completed trade studiesbetween August and September last year, he says, then fabricated a set of optimal shapes fortesting in a wind tunnel. Although the split-tip design appears to be a new innovation, it tracesback to Robb's previous work as a chief aerodynamicist at McDonnell Douglas. The airframerthat merged with Boeing in 1997 had pioneered the installation of winglets on airliners in themid-1980s. The MD-11 entered service with an up/down winglet, with a shortened lower surfaceforward of the upper surface. The lower surface was shaped to improve stall characteristics atlow-speed, Gregg says. McDonnell Douglas also proposed a split-tip winglet for the short-livedMD-12, a late-1980s concept for a four-engined double-decker. As the chief aerodynamicist ofthe MD-12 concept, Gregg says, he proposed the split-tip to optimize lift of a wingspanartificially constrained to a length of 64.9m (213ft) to fit into existing airport gates. Likewise, the737 Max also demanded more performance than a blended winglet could produce. "Because weneeded more performance to satisfy the customers we felt we needed to push the technology a bitfurther," Gregg says. A split-tip wingtip has never been tested in flight test, and Boeing currentlyhas no plans to test the 737 Max AT Winglet on a surrogate platform. Boeing is confident thatcomputational fluid dynamics models have predicted drag characteristics accurately, Gregg says.At the same time, Boeing is not convinced a split-tip winglet will produce performanceimprovements as a retrofit option on the 737NG, although it has not conducted an analysis yet.Holding Boeing back is the knowledge that the AT Winglet increases the aerodynamic loads on
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the outboard wing section. "The better the winglet the more load it's going to drive outboard.Otherwise it didn't do anything for you," Michael Teal, chief project engineer on the 737 Max,said in a July interview. "The question is how difficult it would be to retrofit," he added. "You'regetting out there on the end of a wing; it's not that thick. It's not something that's easy to takeapart and add gauge to." Despite being joint-venture partners, Boeing and Aviation Partners also

have different views on the margin of benefit provided by a split-tip winglet. Boeing predicts thestraight-edged split-tip on the 737 Max will contribute 1.5% to fuel burn reduction. AviationPartners, on the other hand, is proposing a 2.5% to 3% benefit from installing the scimitar-edgedwinglet on the 737NG, which shares the same airfoil as the 737 Max. Even so, Aviation Partnersis optimistic that scimitar-edged split wing-tips will be retrofitted on as much as 60% of the737NG fleet, Clark says.

2 May 2012 - Boeing Designs Advanced Technology Winglet for 737 MAX

RENTON, Wash., May 2, 2012

Boeing announced today a new winglet design concept for the 737 MAX. The new AdvancedTechnology winglet will provide MAX customers with up to an additional 1.5 percent fuel-burnimprovement, depending on range, on top of the 10-12 percent improvement already offered onthe new-engine variant.

"The Advanced Technology winglet demonstrates Boeing's continued drive to improve fuel burnand the corresponding value to the customer. With this technology and others being built into theMAX, we will extend our leadership," said Jim Albaugh, president and CEO, BoeingCommercial Airplanes. "Incorporating this advanced technology into the 737 MAX design will

give our customers even more advantage in today's volatile fuel price environment."

Compared to today's wingtip technology, which provides up to a 4 percent fuel-burn advantageat long ranges, the Advanced Technology winglet provides a total fuel-burn improvement of upto 5.5 percent on the same long routes.

"The concept is more efficient than any other wingtip device in the single-aisle market becausethe effective wing span increase is uniquely balanced between the upper and lower parts of thewinglet," said Michael Teal, chief project engineer, 737 MAX.

Boeing aerodynamicists used advanced computational fluid dynamics to combine rake tip

technology with a dual feather winglet concept into one advanced treatment for the wings of the737 MAX. The Advanced Technology winglet fits within today's airport gate constraints whileproviding more effective span thereby reducing drag. Ongoing 737 MAX testing in the windtunnel validated the new concept on the airplane.

The super-efficient design has been incorporated into the 737 MAX design and productionsystem plans. "We have assessed the risk and understand how to leverage this new technology onthe MAX within our current schedule," said Teal. "This puts us on track to deliver substantial


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additional fuel savings to our customers in 2017." Airlines operating the 737 MAX now will gainan 18 percent fuel-burn per-seat improvement over today's A320. Depending on the range of themission, MAX operators will realize even more savings.

"Adding the Advanced Technology winglet to the 737 MAX is consistent with our demonstrated

performance on delivering increasing value to our customers, on time, throughout the life of the737 program," said Beverly Wyse, vice president and general manger, 737 program.

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

30 Apr 2007 - APB selects UK supplier as it launches 767-300ER programme with

American order

UK-based GKN Aerospace has been selected by Aviation Partners Boeing (APB) as a newsupplier of the US company's blended winglets for the rapidly expanding Boeing 737 "Classic"and newly launched 767 retrofit programmes, while United Airlines is poised to start retrofittingits 757s.

The aerostructures specialist joins APB winglet supplier Kawasaki Heavy Industries. Wingletsfor the 737 Next Generation. Despite the much-needed addition of GKN, APB says the 737Classic retrofit line is sold out through 2009 at the rate of six shipsets a month. "We're still goingto ramp up as fast as we can, but it will be the end of this year or early next before they can begin

providing the first parts," says APB vice-president sales Patrick LaMoria.

26 Dec 2006 - Aviation Partners Boeing Launches 737-900 Blended Winglet Program

With program launch of Aviation Partners Boeing 737-900 Blended Winglets, and firstdeliveries slated for December 2007, the world's airways will soon be making room for evenmore Blended Winglet Performance Enhanced airplanes. Launch customers Continental Airlines,

KLM and Alaska Airlines plan to complete the retrofit of their 737- 900s by the end of the firstquarter of 2008.

"We've had a great deal of customer interest in 737-900 Blended Winglets and this importantnew program gives more of our operators commonality and the ability to fly with 100% BlendedWinglet equipped 737NG fleets," says Aviation Partners Boeing CEO John Reimers. "Thisprogram is off to a very strong start and we anticipate that the remaining handful of operators of


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the 737-900 will be unable to ignore the tremendous value Blended Winglets add to the aircraft."

Benefits of Aviation Partners Boeing's Visible Technology are nothing short of dramatic in fuelsavings, improved performance and environmental advantages. Given average aircraft utilizationrates, operators will save over 100,000 gallons (380,000 liters) of fuel per aircraft per year

resulting in a payback on investment of less than 3 years. Noise footprint, on takeoff and landing,is reduced by an average of 6.5% while engine emissions of carbon dioxide and nitrous oxidesare lowered on the order of 5.0%.

"Blended Winglets will give KLM improved range and payload on many longer stage lengths inits European Network," says KLM's Vice President of Fleet Services Rene Kalmann. "Furtherthis decision fits in KLM's Corporate Social Responsibility policy to invest in environmentalprotection that goes beyond regulatory compliance."

For KLM Royal Dutch Airlines, Blended Winglet equipped 737-900s will continue to provideimportant fuel savings while adding to fleet commonality -- the airline will be installing 21

additional Blended Winglet Systems on the 737-800 beginning in March 2007. All 737-800s inKLM's fleet will be Winglet equipped by February 2008.

"Continental remains steadfast in its efforts to improve aircraft performance and reduce fuelusage. Equipping our 737-900s with Blended Winglets moves us closer to that goal," says JohnGreenlee, Managing Director of Fleet Planning for Continental. "The fuel efficiencyimprovements offered by Blended Winglets coupled with our young fleet provide Continentalwith a natural hedge against volatile fuel prices."

For Continental Airlines, Blended Winglet equipped 737-900s will complement the carrier'sexisting winglet equipped aircraft, which include 100% of its 737-700s, 737-800s and 757-200s.

To date the airline has installed winglets on 182 aircraft and plans to add over 100 additionalSystems in the next few years as it will soon begin retrofitting winglets onto its 737 Classic fleetwhile continuing to take new 737NG aircraft with winglets, including the new 737-900ER.

"Our long-haul flying will benefit greatly from the fuel savings and payload advantages providedby blended winglets," said Scott Ridge, Alaska Airlines' managing director of technicaloperations and support. "We've seen the value of the winglets on our other next-generation 737sand look forward to achieving similar efficiencies with our -900s."

Alaska's order for 9 shipsets of 737-900 Blended Winglets adds to their current order of: 19 737-700's and 37 737-800's of which 33 are already in service.

By year-end 2006, over 1500 Blended Winglet Shipsets will be in service with over 100 airlinesin more than 40 countries on 6 continents. Currently, 65% of in-service fleet of 737-700s, and57% of in-service 737-800s, are Blended Winglet Equipped. By 2010, with over 4500 airlinersupgraded, APB anticipates that Blended Winglet Technology will have saved commercialairlines over 2 billion gallons of fuel.


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5 Apr 2005 - MAS to install winglets for Boeing

The Boeing Co. signed a deal with Malaysia's national carrier yesterday to set up a regional

winglet modification center outside the capital, Kuala Lumpur, a Boeing official said.

Aviation Partners Boeing and Malaysia Airlines Engineering sealed the agreement yesterday inKuala Lumpur, agreeing to operate the first center in Southeast Asia to install fuel-savingwinglet technology on Boeing's 737s.

The pact will enable the engineering firm to become a one-stop shop for airlines, said CraigMcCallum, sales director of Aviation Partners Boeing.

More than 100 aircraft are expected to go through the Malaysian center for conversion in thenext three to four years, McCallum said. The facility will cater to the needs of airliners from

countries such as Indonesia, India and Malaysia.

Boeing will provide all manufacturing and engineering support, tools and training to the center.

The announcement comes amid rumors that Malaysian Airlines is considering buying 737-800s.However, Boeing denied any link between the airline's purchase order and the facility deal.

The Malaysia facility will be the fourth in the Asia-Pacific region, joining facilities in China,Hong Kong and New Zealand.

"Growth in blended winglet sales has been nothing short of spectacular lately, and much of this

growth has been in the Asia-Pacific region," Mike Marino, Aviation Partners Boeing CEO, saidin a statement.

Introduced in 1999, the winglet technology has become popular because of the significant fuelsavings it provides for aircraft -- ranging from 100,000 to 250,000 gallons per year per aircraft.The winglet system is currently available for Boeing 737s, and efforts are under way to offerthem on 757s, 767s and 777s in the future.

14 Jan 2005 - Hapag-Lloyd Original Launch Customer Comes Back for More APB

Blended Winglets

Hapag-Lloyd Flug, a member of the TUI Group and the launch customer for Boeing 737-800Blended Winglets 4 years ago, has ordered 10 additional Blended Winglet Systems. The BoeingCompany will install the Blended Winglets as Buyer Furnished Equipment (BFE) on new 737-800s to be delivered between January 2006 and May 2007. Hapag-Lloyd operates a 100%


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Blended Winglet Equipped fleet of 737-800s. After 4 years of enjoying dramatic fuel savings,along with measurable performance and environmental benefits made possible with BlendedWinglet Technology, this leading charter operator is sold on the benefits of Aviation PartnersBoeing Technology.

"This important order is a real affirmation of the outstanding value of our product," saysAviation Partners Boeing CEO Mike Marino. "Hapag-Lloyd, our most experienced customer,has an intimate understanding of the compelling value of Blended Winglet Technology."

Hapag-Lloyd enjoys a wide range of operational benefits with Aviation Partners Boeing'spatented* Blended Winglet Technology. At current fuel prices the fuel savings alone translatesinto a Blended Winglet Payback of under 4 years. Additional important benefits include greaterpayload-range capability and environmental advantages in terms of reduced engine emissionsand reduced noise on takeoff.

Aviation Partners Boeing Vice President of Sales & Contracts Patrick LaMoria reports that

Hapag-Lloyd needed no convincing to come in with its second Blended Winglet order. "Hapag-Lloyd's experience operating with Blended Winglet Technology has made including them withevery new Boeing aircraft they operate a very simple decision."

By mid-2005 over half of all Boeing 737-800 and 700 series aircraft will be equipped withAviation Partners Boeing Blended Winglets.

7 Oct 2004 - Continental Airlines to Take Shipset #500 for NG Boeing 737-800

While delivery of shipset 500 is a milestone in the history of Aviation Partners Boeing, it's just ahint of things to come as the global airline industry transitions to patented* Blended WingletTechnology.

Blended Winglet Equipped Boeing aircraft are now flying on every continent. Current orders andoptions stand at over 1200 shipsets with a potential universe of 10,500 Boeing aircraft in theretrofit market alone.

"We're only in the early stages in terms of meeting the growing demand for PerformanceEnhancing Blended Winglet Technology. But, it's a significant beginning," says AviationPartners Boeing CEO Mike Marino. "Blended Winglet Equipped commercial aircraft save fuel,operate with enhanced performance due to a higher lift wing, and are measurably moreenvironmentally friendly. Today's 500 Blended Winglet Equipped 737 are saving over 50 milliongallons of fuel each year. If all Boeing aircraft worldwide were retrofitted with Blended Winglet


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Systems worldwide fuel savings would be close to 1.8 billion gallons each year."

Aviation Partners Inc. developed Blended Winglet Technology in the early 1990s. Sized formaximum performance, and with a wider sweep transition between wing and winglet, BlendedWinglets are typically 80% more effective than today's conventional angular winglet systems.

Typical operator benefits include fuel savings of up to 5%, depending upon flight profile,improved performance from high and hot airfields, faster time to climb, lowered engineemissions and a 6.5% reduction in takeoff noise footprint.

"The future is as exciting for us as it is for our customers worldwide who look forward toimproving the performance, fuel savings and overall return on investment of their aircraft," saysAviation Partners Boeing Chairman Joe Clark. "We believe that anytime you can improve theproductivity and environmental benefits of an existing airplane, it's a wise investment."

10 Jul 2003 - Air Plus Comet Becomes World's First Operator of Boeing 737-300 with

Winglets

Air Plus Comet yesterday became the world's first operator of a Boeing 737-300 with advanced-technology blended winglets and the latest carrier in Spain operating Boeing airplanes.

The winglets, which curve out and up from the plane's wing tips, improve an airplane'sperformance and allow it to fly more than 185km farther than a 737-300 without winglets.Winglets also offer excellent environmental benefits, including reduced fuel use, takeoff and

landing noise, and in-flight engine emissions.

"As the first worldwide customer for the new 737-300 blended winglet, we will be the first toexperience the fuel savings and environmental benefits they bring," said Alejandro Avila, AirPlus Comet technical director.

The 737-300, leased from Aircraft Leasing Management, was delivered today. Headquartered inMadrid, Air Plus Comet provides long-distance charter flights between Spain and Europeanlocations and the Americas. It began operations in 1997.

Aviation Partners Boeing, a joint venture of Boeing and Aviation Partners, Inc., developed the

winglets. The winglets can be installed on 737-300, -400, -700 and -800 models. More than 28carriers fly nearly 300 winglet-equipped 737s.


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18 Feb 2003 - 737-300 Winglet Certification Delay

The STC for a retrofited winglet on the 737-300 has been delayed due to problems discoveredduring the low speed handling phase of flight testing in Arizona. The winglets were producinghandling deficiencies near V2 at high gross weights caused by flow separation around the

transition to the winglet. Possible solutions include aerodynamic to the wingtips and outboardvortex generators.

5 Dec 2002 - Blended winglet Boeing 737 makes European inroads

Sobelair, a Belgian charter operation, is leasing its first Boeing 737-800 with blended winglets.

The winglet gives the Wichita-made 737 reducing wing drag, and making the wing more

aerodynamically efficient, officials say.

"Sobelair flies particularly long routes to destinations in Africa, the Mediterranean and theMiddle East," says Aviation Partners Boeing sales director Patrick LaMoria, who is handling thelease.

By the end of 2002, close to 200 Boeing Next-Generation 737s will be equipped with APB'spatented Blended Winglet Technology. Following introduction of Blended Winglet Systems for


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Classic Series 737s, mid-2003, APB will certify Blended Winglet Systems for the 747-400.

Oct 2002 - Boeing 737-300 Blended Winglets Delivered

Kawasaki delivered its first Blended Winglets. to Aviation Partners Boeing (APB) in October.Kawasaki is designing, developing and manufacturing the patented innovative winglets for theBoeing 737-300/400/500 models under an official agreement inked with APB in October lastyear (see Feb. 2002 Business Activities).

Blended winglets, which are made of a high-tech composite material specially developed foraircraft, are attached to the tips of the wings to enhance performance by extending flight ranges,reducing noise and making other improvements. Winglets are already a standard feature on theBoeing Business Jet. The Boeing 737-700/800 models and Gulfstream's GII Business Jets have

also been equipped with them. It is anticipated that they will also be fitted to a wider range ofBoeing's existing aircraft, including the 747, 757 and 767 fleets. There are currently 1,000Boeing 737-300 jetliners in operation around the globe. The winglets will be available as anoption for those Boeing aircraft being retrofitted.

Kawasaki used its proprietary KMS- 6115 composite material to create the latest winglets. KMS-6115 is made from high-performance carbon fibers and toughened epoxy resin, with muchgreater tensile and compressive strength than conventional composite materials. This is the firsttime KMS-6115 will be used in a Boeing aircraft.

26 Feb 2002 - Partnership with Boeing 'starting to take off'

Seattle PI --

If you choose to sleep with an elephant, just be careful it doesn't roll over during the night. Theadvice, and warning, came from a well regarded aerospace executive of a small company whoyears ago lay down with an industry giant for a promising joint venture. It proved a painfulexperience. The executive mentioned the elephant adage recently when talking about Joe Clark,founder of Aviation Partners, a small Seattle company that developed revolutionary blendedwinglets that attach to the end of an airplane wing to improve performance.

Clark has been sleeping with an elephant since the 1999 Paris Air Show. It was there that Clarkand The Boeing Co., the biggest aerospace company and commercial airplane maker on theplanet, announced the formation of Aviation Partners Boeing, a joint venture to put Clark'sblended winglets on 737 jetliners. While acknowledging there have been "growing pains,""cultural clashes" and "learning experiences," Clark also said the partnership with Boeing is


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"really starting to take off."

A growing number of next generation 737 operators around the world have opted for the blendedwinglets, which can boost fuel efficiency by as much as 4 percent. And they have helped Boeingwin orders over Airbus. One of Boeing's most important order victories last year was the

decision by Qantas, Australia's flagship carrier, to buy 15 737-800s and take options for at least40 more. People close to the deal said the blended winglets offered on the Boeing plane gave it asmall but important performance edge over the Airbus A320 on new long-haul domestic routesplanned by Qantas. The blended winglets are offered as a retrofit for the 737-700 and the bigger737-800. They are offered by Boeing as a factory-installed option only on the 737-800. So far,more than 80 next generation 737s have been equipped with blended winglets, along with about60 Boeing Business Jets, a modified version of the 737 commercial jetliner. The winglets arestandard equipment on all Boeing Business Jets. Clark expects that another 180 next generation737s will be equipped with the blended winglets this year. Of those, about 50 will probably befactory-installed in Renton, he said. About a dozen airlines are either flying winglet-equipped737s or have them on order. "We are talking actively with another dozen airlines," Clark said

during a recent interview at his Aviation Partners office near the King County Airport terminal atBoeing Field. "We will be announcing more orders soon."

Clark is even talking with the military and defense contractors. He met recently met withofficials at Northrop Grumman about putting blended winglets on the Global Hawk unmannedaerial vehicle that has been used in Afghanistan. The winglets would add about two hours offlight time for the Global Hawk, Clark said. "Every plane should be designed with winglets,"Clark said.

Winglets were common on business and commercial jets before Aviation Partners arrived on thescene. But those traditional winglets, found on all Airbus models and the Boeing 747-400, rise at

a sharp angle from the wing. Blended winglets gently curve up, as if they are part of the wing.Winglets were first developed by NASA in the 1960s to help reduce drag. Increasing the wingspan can produce the same results. But wings of jetliners can't get any longer and still fit atairport gates. What's more, increasing wing span means structural changes that add weight. Sofar, the only U.S. carrier with 737s equipped with blended winglets is American Trans Air. ButClark recently presented his friend John Kelly, chairman of Alaska Airlines, with a small modelof a 737-700 with blended winglets. The two men have known each other since the days whenClark teamed with Milt Kuolt in 1981 to form Horizon Air, a regional carrier later sold toAlaska. The model Clark gave to Kelly was painted in the livery of Alaska Airlines, with theEskimo logo on the winglets. "A picture is worth a thousand words," Clark said, explaining whyhe was giving the model to Kelly.

Continental is another 737-700 operator being wooed. The 737 is the world's most frequentlyflown jetliner. More than 4,000 have been built. Later this year, the blended winglets are to becertified by the Federal Aviation Administration for the older "classic" 737s, starting with the737-300. Certification will follow for the 737-400 and 737-500. His company's business planincludes blended winglets for the 757, 767 and 747, Clark said, as well as for the MD-80 series."The retrofit market is huge," Clark said. "Our schedule is to certify the classic 737s this year,


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the 747 next year, the 767 after that and then the 757."

The winglets designed for the next generation 737 are about 8 feet high. Bernie Gratzer, formerchief aerodynamicist at Boeing who was part of Clark's team at Aviation Partners that developedthe blended winglets, said the 747 flight tests showed the winglets reduced drag by about 6.3

percent. That can mean substantial fuel savings for an airline. Clark has been approached byoperators of older 747s, asking about retrofitting their planes with the blended winglets. "Wethink we can save them about a million gallons of fuel a year per plane," he said. But Boeing isnot sold on blended winglets, at least for its bigger jets. Boeing engineers developed a raked tip,which does not bend upward like a winglet, for the 767-400 and will use those raked tips for thelonger-range 777-300 now in development. And Boeing is considering raked tips, not blendedwinglets, for future longer-range versions of its 747-400. "Why put raked tips on a 747? That's agood question," said Gratzer, who retired from Boeing in 1986 and later was a professor at theUniversity of Washington's aeronautics and astronautical department. "We don't reallyunderstand why they (Boeing) would do that," he added. But it was not so long ago that manyengineers at Boeing scoffed at the notion that winglets would do anything other than give the 737

a more sexy appearance. After all, wasn't that why all those rich guys who could afford privatejets wanted ones with winglets?

At the Paris Air Show in 1997, Boeing's Borge Boeskov approached Clark about blendedwinglets on the planned Boeing Business Jet, a next generation 737-700 with the strengthenedwing of the 737-800. Clark's subsequent business proposal for Boeskov said the Boeing BusinessJet would get from 4 to 5 percent better performance with blended winglets. "The corporate guyslike the looks of these things because they differentiate the product, but frankly my engineershave told me they don't work," Borge told Clark. So Clark told Boeskov his small companywould foot the bill to design winglets for the Boeing Business Jet if Boeskov would test fly themon the plane. Unable to get Boeing engineers to go along, Boeskov turned to the German carrier

Hapag-Lloyd, a longtime Boeing 737 customer. Hapag-Lloyd supplied one of its new 737s, andthe results were better than Clark had predicted -- a nearly 7 percent reduction in drag. Hapag-Lloyd is now one of those customers operating 737s with blended winglets.

Clark, who is not at all shy about expressing his opinions, is careful in talking about thechallenges he has faced working with the world's largest aerospace company on an idea thatBoeing's best and brightest once rejected. "They are a big bureaucracy and we sometimes want toget things done quickly," Clark said of the joint venture with Boeing. He credited Alan Mulally,Boeing's commercial boss, with helping change attitudes within the company. "Since Alan hasgotten behind this, it has changed overnight," Clark said. "We talked about five months ago andhe said he would really get behind the winglets program. "Since then, sales have really taken off.

Our relationship with everyone at Boeing has gotten much better." Then he added, "Of course,we still have our differences." So far, though, the elephant has not rolled over.

8 February 2002 - Kawasaki of Japan will build 737 winglets


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Friday, February 8, 2002

SEATTLE POST-INTELLIGENCER STAFF AND NEWS SERVICES

TOKYO -- Kawasaki Heavy Industries Ltd., Japan's second-biggest aerospace company, said it

will develop wingtips for Boeing Co. 737s, adding to an existing cooperation with the company.

Kawasaki Heavy will make blended winglets, which increase fuel efficiency and range, thecompanies said. The companies didn't provide financial details.

Owners of 737s, of which more than 1,900 are in service around the world, will be able to fit thewingtips onto their planes, the release said.

SEATTLE, Sept. 11, 2001 -The first Boeing 737-700

arrived in Kenya Monday,

making Kenya Airways the

first airline anywhere in the

world to operate a 737-700

with blended winglets.

Kenya Airways is expected

to put the airplane into

service later this month. The

airplane will be leased

through GE Capital Aviation

Services.

"Our goal is to become thepremier airline of choicein Africa and providemore frequency for

passengers," said Isaac Omolo Okero, chairman for Kenya Airways. "The 737's economics andlow maintenance cost will help us continue to provide the best service to destinations throughoutAfrica."

The retrofitted blended winglets on the 737-700 curve out and up from the wingtip, reducingaerodynamic drag and boosting performance. Some of the potential improvements include betterfuel burn, increased range, improved takeoff performance and obstacle clearance. Working withAviation Partners Inc., Boeing developed the blended winglet technology for the 737 airplane.

"The addition of the winglets on the 737-700 will provide Kenya Airways with a superior


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product," said Kevin Bartelson, chief operating officer for Aviation Partners Boeing. "The new737-700 with winglets will add value to operators and provide a technologically advancedproduct with a reputation for superior reliability."

The family of 737s consisting of the 737-600, -700, -800 and -900 is the newest design and the

most technologically advanced in the single-aisle market.

"Kenya Airways' selection of the 737 airplane will help reduce its fleet costs, which directlyaffects the airline's bottom line," said Doug Groseclose, senior vice president of InternationalSales, Boeing Commercial Airplanes. "With the new 737s, Kenya Airways can continue to offerits customers a quality product and on-time in-service performance."

The airplanes are designed to fly higher, faster, farther, quieter and with greater fuel efficiencythan previous 737 models -- and the competition.

Kenya Airways, one of the fastest growing and most profitable airlines in Africa, will use the

new 737 to fly to key destinations in Africa and other domestic routes on the continent. There aremore than 130 Boeing 737s operating in Africa and more than 4,000 737s in service today.

Boeing 737 Advanced-Technology Winglets Make World Debut

SEATTLE, May 21, 2001-- Boeing Next-Generation 737-800 advanced-technology wingletsmade their world debut in revenue service last week with German carrier Hapag-Lloyd Flug.

Hanover-based Hapag-Lloyd became the first airline in the world to fly 737-800s equipped withthe cost-effective, environmentally friendly wingtip extensions on commercial routes. The carrieruses 737-800s with winglets on routes from Germany to Mediterranean destinations.

The new winglets on the Boeing 737-800 curve out and up from the wingtip, reducingaerodynamic drag and boosting performance. They add about 5 feet (1.5 meters) to the airplane'stotal wingspan and allow the airplane to fly up to 130 nautical miles (240 kilometers) further.

"The winglets on our 737-800s will cut the airplane's already low fuel consumption, emissionsand takeoff noise and make them even more eco-friendly," said Wolfgang Kurth, Hapag-Lloyd

managing director. "Less fuel means more range and gives us the opportunity to open newmarkets"

The fuel consumption of the 737-800s without winglets in Hapag-Lloyd's fleet already is as lowas 2.1 liters per 100 seat kilometers. "We expect the winglets to decrease fuel burn even further -by up to 5 percent in cruise - and reduce the noise affected area by 6.5 percent," Kurth said.

Winglets also have the potential to increase the optimum cruise altitude of the airplane, reduce


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engine maintenance costs, improve takeoff performance, and increase the weight the airplane cancarry by .55 of a ton to 3.3 tons (.5 of a ton to 3 metric tons).

"Next-Generation 737 winglets have proven their value in service on privately owned BoeingBusiness Jets, and now Hapag-Lloyd will see firsthand the unmatched benefits winglets can

bring to commercial operators," said Toby Bright, Boeing Commercial Airplanes senior vicepresident for Europe and Russia. "Hapag-Lloyd, which was the first airline to order the new-technology 737-800s back in 1994, will once again make history as a company that quicklyrecognizes the importance of technological improvements in aviation."

Hapag-Lloyd has started to retrofit its fleet of 27 Boeing 737-800s with winglets.

Winglets initially were developed for use on the Boeing Business Jet, an adapted Next-Generation 737-700 with 737-800 wings, by Aviation Partners, Inc. (API). During the designprocess, Boeing and API formed a joint venture that further developed the design. The jointventure is called Aviation Partners Boeing (APB).

Building a quieter, more fuel-efficient airplane was a top priority for Boeing engineers whoinitially designed the 737-800 and other members of the Next-Generation 737 family. Themodel's new CFM56-7 engines produced by CFMI, a joint venture of General Electric Co. of theUnited States and Snecma of France, meet community noise restrictions well below currentStage 3 limits and below expected Stage 4 limits. Emissions also are reduced beyond requiredstandards.

Winglets boost to Boeing 737--800 performance

SEATTLE, Feb. 18, 2000- The Boeing Company announced today that it is offering Next-Generation 737-800 customers a new, advanced-technology winglet as a standard option.

The winglet will allow a new airplane that already flies farther, higher and more economicallythan competing products to extend its range, carry more payload, save on fuel and benefit theenvironment. The first Boeing 737-800 with winglets is expected to be delivered in the spring of2001. All subsequent 737-800s will be equipped with structurally enhanced wings that will makeit easier for owners of standard 737-800s to retrofit those jetliners with winglets.

"The key to product leadership is to create a superior product, then continually improve it in

ways that add value to customers," said John Hayhurst, vice president and general manager, 737programs. "With this new winglet, the Next-Generation 737 will remain the most advancedairplane family in its class for the 21st century, just as it was for the 20th."

A Next-Generation 737-800 equipped with the new winglet will be able to fly farther, burn 3percent to 5 percent less fuel, or carry up to 6,000 pounds more payload. Other benefits include areduction in noise near airports, lower engine-maintenance costs, and improved takeoff


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performance at high-altitude airports and in hot climate conditions.

The winglets weigh about 120 pounds each. They are made of high-tech carbon graphite, anadvanced aluminum alloy and titanium. The winglet is eight feet long and tapers from its four-foot wide base to a width of two feet at the tip. Unlike traditional winglets typically fitted at

abrupt angles to the wing, this new advanced "blended" design gently curves out and up from thewing tip, reducing aerodynamic drag and boosting performance.

The 737-800 winglet was developed initially for the Boeing Business Jet (BBJ), which alsofeatures the state-of-the-art 737-800 wing. This winglet will be available initially as an option onthe 162-passenger 737-800. Formal availability of the winglet will follow quickly on othermodels that feature the 737-800 wing, including the 737-700C and the 737-900. Theapplicability of the winglet to Next-Generation 737-600 and 737-700 models is being assessed.

The blended-winglet technology was developed by Aviation Partners Inc. of Seattle. In 1999,during the design of the BBJ winglet, Aviation Partners and The Boeing Company formed

Aviation Partners Boeing (APB), a joint venture that completed and owns the design. APB isdeveloping the capability to make the winglet available as a retrofit for airplanes already inservice.

SEATTLE, Oct. 23, 2000-German carrier Hapag-Lloyd Flugbecame the first airline to fly theBoeing 737-800 with blended

winglets. The test flight took placeSept. 26 2000 in Seattle.

First BBJ flight with winglets

Feb 22, 1999

Boeing Business Jets Announces Winglets Test

SEATTLE, June 4, 1998Boeing Business Jets announced today that it has been testing the use of


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boeing winglet

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