Boeing 747-8

Boeing 747-8
Boeing 747-8I of Lufthansa, the type's largest operator (2015)
Role Wide-body jet airliner
National origin United States
Manufacturer Boeing Commercial Airplanes
First flight 747-8F: February 8, 2010
747-8I: March 20, 2011
Introduction 747-8F: October 12, 2011, with Cargolux
747-8I: June 1, 2012, with Lufthansa
Status In service
Primary users Lufthansa
Korean Air
Cargolux
Cathay Pacific
Produced 2008–present
Number built 115 as of July 2017[1]
Unit cost
747-8F: US$378.5 million[2]
747-8I: US$379.1 million[2]
Developed from Boeing 747-400

The Boeing 747-8 is a wide-body jet airliner developed by Boeing Commercial Airplanes. Officially announced in 2005, the 747-8 is the third generation of the 747, with a lengthened fuselage, redesigned wings, and improved efficiency. The 747-8 is the largest 747 version, the largest commercial aircraft built in the United States, and the longest passenger aircraft in the world.[3]

The 747-8 is offered in two main variants: the 747-8 Intercontinental (747-8I) for passengers and the 747-8 Freighter (747-8F) for cargo.[4] The first 747-8F performed the model's maiden flight on February 8, 2010, with the 747-8I following on March 20, 2011. Delivery of the first freighter aircraft occurred in October 2011 and the passenger model began deliveries in 2012. As of July 2017, confirmed orders for the 747-8 total 133: 88 of the freighter version, and 45 of the passenger version.[1]

Development

Background

Boeing had considered larger-capacity versions of the 747 several times during the 1990s and 2000s.[5] The 747-500X and -600X, proposed at the 1996 Farnborough Airshow, would have stretched the 747 and used a 777-derived wing,[5] but did not attract enough interest to enter development. In 2000, Boeing offered the 747X and 747X Stretch derivatives as alternatives to the Airbus A3XX. This was a more modest proposal than the previous −500X and −600X. The 747X would increase the 747's wingspan to 229 ft (69.8 m) by adding a segment at the root.[6] The 747X was to carry 430 passengers up to 8,700 nmi (16,100 km). The 747X Stretch would be extended to 263 ft (80.2 m) long, allowing it to carry 500 passengers up to 7,800 nmi (14,400 km).[6] However, the 747X family was unable to attract enough interest to enter production. Some of the ideas developed for the 747X were used on the 747-400ER.[7]

Boeing's Everett Facility at Paine Field, originally built for the 747 program, is the site of 747-8 assembly.

After the 747X program, Boeing continued to study improvements to the 747. The 747-400XQLR (Quiet Long Range) was meant to have an increased range of 7,980 nmi (14,780 km), with better fuel efficiency and reduced noise.[8] Changes studied included raked wingtips similar to those used on the 767-400ER and a 'sawtooth' engine nacelle for noise reduction.[9] Although the 747-400XQLR did not move to production, many of its features were used for the 747 Advanced.

In early 2004, Boeing announced tentative plans for the 747 Advanced that were eventually adopted. Similar in nature to the 747X, the stretched 747 Advanced used technology from the Boeing 787 Dreamliner to modernize the design and its systems.[10] On November 14, 2005, Boeing announced that it was launching the 747 Advanced as the "Boeing 747-8".[11]

Design effort

The 747-8 was designed to be the first lengthened 747 to go into production. The 747-8 and shortened 747SP are the only 747 variants with a fuselage of modified length. The 747-8 was intended to use the same engine and cockpit technology as that of the 787, including the General Electric GEnx turbofan and partial fly-by-wire.[12] Boeing said that the new design would be quieter, more economical, and more environmentally friendly than previous versions of the 747. As a derivative of the already-common 747-400, the 747-8 has the economic benefit of similar training and interchangeable parts. Boeing firmed the 747-8 Freighter's configuration in October 2006.[13]

The 747-8, as the current new development of Boeing's largest airliner, is notably in direct competition on long-haul routes with the Airbus A380, a full-length double-deck aircraft now in service. For airlines seeking very large passenger airliners, the two have been pitched as competitors on various occasions. Boeing states that the 747-8 is more than 10 percent lighter per seat and is to consume 11 percent less fuel per passenger than the A380, translating into a trip-cost reduction of 21 percent and a seat-mile cost reduction of over 6 percent.[14]

Production of the first 747-8 Freighter began in Everett in early August 2008.[15][16] On November 14, 2008, Boeing announced a delay to the 747-8 program, citing limited availability of engineering resources within Boeing, design changes, and the recent strike by factory workers.[17][18][19] On July 21, 2009, Boeing released a photograph of the first cargo airplane, its fuselage and main wing assembled.[20]

The 747-8 landing gear configuration is the same as on earlier 747 versions

In February 2009, only one airline customer (Lufthansa) had ordered the 747-8I passenger model, and Boeing announced it was reassessing the 747-8 project. Chief executive Jim McNerney stated that continuation of the project was not a foregone conclusion. The company was assessing various options.[21][22]

In October 2009, Boeing announced that it had delayed the first flight on the 747-8 until the first quarter of 2010 and delayed 747-8I delivery. The company took a US$1-billion charge against its earnings for this delay.[23][24][25] In response, launch customer Cargolux stated it still intended to take delivery of the thirteen freighters it had ordered; Lufthansa confirmed its commitment to the passenger version.[26] On November 12, 2009, Boeing announced that Cargolux's first airplane was fully assembled and entering the Everett plant's paint shop. It was to undergo flight testing prior to delivery.[27]

On December 4, 2009, Korean Air became the second airline customer for the −8I passenger model, with an order for five airliners.[28][29] On January 8, 2010, Guggenheim Aviation Partners (GAP) announced the reduction of its −8F order from four to two aircraft.[30] In March 2011, Korean Air converted options into a firm order for two additional −8 freighters.[31][32] It received its first -8I in late August 2015.[33]

Flight testing and certification

Boeing 747-8 flight deck

The 747-8's first engine runs were completed in December 2009.[34] Boeing announced the new model had successfully completed high-speed taxi tests on February 7, 2010.[35] On February 8, 2010, after a 2.5-hour weather delay, the 747-8 Freighter made its maiden flight, taking off from Paine Field, Washington at 12:39 PST,[36] and landed at 4:18 pm PST.[37] Boeing estimated that more than 1,600 flight hours would be needed in order to certify the 747-8.[38] The second test flight in late February, a ferry flight to Moses Lake, Washington, tested new navigation equipment.[39] Further flight testing was to take place in Moses Lake, conducting initial airworthiness and flutter tests, before moving to Palmdale, California, for the majority of flight tests, so as to not interfere with 787 flight tests based out of Boeing Field in Seattle.[40]

By March 11, 2010, the 747-8F had flown thirteen flights covering a total of 33 hours.[41] On March 15, 2010, the second 747-8F first flew from Paine Field to Boeing Field, where it was briefly based before moving to Palmdale to continue flight testing with the first −8F.[42] On March 17 the third −8F made its first flight and joined the test program.[43]

The prototype Boeing 747-8F during flight testing

During the flight tests, Boeing discovered a buffet problem with the aircraft, involving turbulence coming off the landing gear doors interfering with the inboard flaps. Boeing undertook an evaluation of the issue, which included devoting the third test aircraft to investigating the problem.[44] The issue was resolved by a design change to the outboard main landing gear doors.[45] In early April 2010, Boeing identified a possible defect in a part at the top of the fuselage called a longeron. According to Boeing, the parts, manufactured by subcontractor Vought Aircraft Industries, are, under certain loads, susceptible to cracking. Boeing said that the issue would not affect flight testing, but other sources stated that the problem could impact the operating envelope of the aircraft until it is fully repaired.[46] Two other problems have been found, with oscillation in the inboard aileron, and a structural flutter, and have not yet been resolved as of 2010. Combined, these problems have slowed flight testing and used up almost all the margin in Boeing's development schedule.[47]

On April 19, 2010, the second flight-test aircraft was moved from Moses Lake to Palmdale to conduct tests on the aircraft's engines in preparation for obtaining a type certification for the aircraft. The remaining aircraft in the test fleet are scheduled to be moved to Palmdale during May.[48] It was reported on June 3, 2010, that an engine on the second 747-8F was struck by a tug during a ground move. The engine cowling was damaged, but there was no damage to the engine itself. After repairs the aircraft is to perform fuel efficiency testing.[49] It was announced on June 14, 2010, that the 747-8 had completed the initial phase of flight-worthiness testing and that the Federal Aviation Administration had given Boeing an expanded type inspection authorization for the aircraft.[50]

Cargolux's first 747-8F in flight over Fresno, California

By the end of June 2010, the three 747-8Fs that composed the flight-test program had flown a total of over 500 hours and had completed hot-weather testing in Arizona.[51] In June 2010, Boeing determined that a fourth −8F aircraft was needed to help complete flight testing. It was decided to use the second production aircraft, RC503, to conduct the non-instrumented or minimally-instrumented tests, such as HIRF and Water Spray Certifications.[52][53] The aircraft, painted in delivery customer Cargolux's new livery, first flew on July 23, 2010.[54]

On August 21, 2010, the 747-8F proved its capability by taking off from the runway at Victorville, California, weighing 1,005,000 pounds (455,860 kg). Its design maximum take-off weight (MTOW) is 975,000 pounds (442,253 kg). The fifth 747-8F joined the flight-test effort with its first flight on February 3, 2011.[55] On September 30, 2010, Boeing announced a further postponement, with the delivery of the first freighter to Cargolux planned for mid-2011.[56][57]

The 747-8 passenger version took to the skies over Everett, Washington, for the first time on March 20, 2011.[58] The second 747-8I flew on April 26, 2011.[59] Three 747-8 Intercontinentals had taken part in flight testing by December 2011.[60]

The 747-8F received its amended type certificate jointly from the Federal Aviation Administration (FAA) and European Aviation Safety Agency (EASA) on August 19, 2011. Freighter deliveries were to begin on September 19, 2011.[61][62] Then on September 17, 2011, Cargolux announced that it would not accept the first two 747-8Fs scheduled for delivery on September 19 and 21, 2011, due to "unresolved contractual issues between Boeing and Cargolux" with the aircraft.[63][64] It entered service in October 2011.[65]

On October 25, 2011, the 747-8 flew to Grantley Adams International Airport in Barbados to begin flight testing in the tropical climate of the Caribbean to determine its effects on the aircraft.[66][67][68] One test −8I was used for an evaluation by Lufthansa in early December 2011 before first delivery in early 2012.[60] On December 14, 2011, the 747-8I received its type certificate from the FAA.[69] The 747-8 has an airport Quota Count of 2 for takeoff and 1 for landing.[70]

In February 2015 the Boeing 747-8 Intercontinental was given 330-minute ETOPS approval, the first time that ETOPS-330 approval was given to a four-engined aircraft.[71]

Into service and further development

On April 21, 2010, Boeing chief executive officer Jim McNerney announced that the company would be accelerating the production of both the Boeing 747 and 777 to support increasing customer demand.[72]

Boeing handed over the first 747-8F to Cargolux in Everett, Washington, on October 12, 2011.[73] The first 747-8 Intercontinental was delivered to Lufthansa on May 5, 2012, and began operating the version on flights from Frankfurt to Washington, D.C., on June 1, 2012.[74]

In 2014, Boeing embarked on an improvement program for the 747-8 named "Project Ozark", with the goal of improved range and lower fuel burn. With all improvements implemented, the resulting aircraft would have a maximum takeoff weight of greater than 1,000,000 lb (450,000 kg). The company slowly introduced aspects of Ozark over time. An engine Performance Improvement Package resulted in 2% lower fuel burn. Boeing also improved the tail fuel tank's function and improved the flight management software. Aircraft produced beginning in 2014 weigh 9,000 lb (4,100 kg) less than the first 747-8 coming off the production line and burns 3.5% less fuel. Other improvements include revised fairings next to the tail and wing-to-body-fairings. The chevrons on the trailing edge of the GEnx-2B nacelle were made thinner. Boeing hoped that these improvements, which benefit both the passenger and freighter version, would help improve sales.[75] Boeing has since updated the incremental improvements planned for the 747-8, of which include; increasing the maximum takeoff weight to 472,000 kg (1,041,000 lb), strengthening the main landing gear, and increasing the aircraft's full-payload range to 8,200 nmi (15,200 km).[76]

Sales prospects

The recent recession in the U.S., combined with market softness in Europe and Asia,[77] has led to lower demand for air freighters as more shipments are made by sea. The world's air cargo fleet in 2012 was smaller than it was in 2003. However, the proportion of very large freighters in that fleet has increased, and Boeing's dominant position in large, fuel-efficient freighters has offered the company an opportunity to protect its market share and its product line despite the market weakness.[78]

Demand has been chiefly for the 747-8F, which accounts for the majority of 747-8 aircraft ordered. The large capacity of the 747-8 is an advantage for the freighter version, not the passenger version. Moreover, the freighter has no direct competitor.[79] Airbus' competing A380 freighter version was canceled during development.[80]

Airlines including Emirates and British Airways considered ordering the passenger version, but opted to purchase the Airbus A380 instead.[81][82] In 2013, Arik Air converted its order for two 747-8s[83] to two 777-300ERs.[84][1] At the 2013 Paris Air Show, Korean Air agreed to order five 747-8 passenger versions, in addition to five ordered in 2009.[85] Korean Air and Boeing finalized the new -8 order in October 2013.[86]

Overall demand for the 747-8 turned out to be below Boeing's initial projections as well, which led to several reductions in production rate. Production was initially decreased from 2 to 1.75 aircraft per month in April 2013 and then reduced further to 1.5 aircraft per month in October 2013.[87] On June 25, 2015, the Wall Street Journal reported that the order backlog was down to 32 and Boeing had decided to reduce production to one aircraft per month in 2016.[88] In January 2016, Boeing confirmed that it was reducing 747-8 production to 0.5 per month beginning in September 2016, incurring a $569 million post-tax charge against its fourth-quarter 2015 profits. The chief reason given was that the recovery of the air cargo market had stalled, resulting in slowed demand for the 747 freighter.[89][90]

Boeing cited the 747-8F as the main driver behind potential future 747-8 orders.[91][92][93] To help reduce production costs in the meantime and maintain the 747 production line's viability, the company plans to integrate the 747 and 767 production lines more closely with each other.[94] Boeing expected the cargo market to improve by mid-2019 and were planning to increase the 747's production rate back to 1/month from then on. However, in July 2016, this production rate increase was cancelled, i.e. 747 production remained at 0.5 per month. At the same time, the company announced another after tax charge of $814 million, reflecting a lower estimation of frames to be produced and revenue realised.[95] In an SEC filing submitted at the same time, Boeing stated that if they were "unable to obtain sufficient orders and/or market, production and other risks cannot be mitigated, [...] it is reasonably possible that we could decide to end production of the 747."[96]

A Boeing 747-8 Intercontinental of launch customer Lufthansa shortly after take-off

The Boeing 747-8I was intended to fill a niche between the Airbus A380 and the Boeing 777-300ER.[97] The future for the 747-8 passenger version appears limited. Airlines bought the original 747 primarily for its range, not its capacity. The advent of long-range twin-engine jets, notably Boeing's own 777, took away the 747's range advantage. Compared to the 747-8I, the upcoming 777-9X "mini jumbo jet" is projected to have a lower fuel cost per seat mile and greater cargo capacity, though it has a lower passenger capacity and higher list price; consequently the 777-9X has tallied more orders than the 747-8I due to airlines placing a high value on fuel efficiency.[98][99] For operators who require high capacity on routes such as Emirates Airlines, most have preferred the Airbus A380 as it is an all-new design while the 747-8's lineage is 40 years old, although some have criticized the A380's looks and complimented the 747-8I's appearance.[97] Analysts do not see bright prospects for VLA (very large aircraft - those with more than 400 seats) whose orders have slowed in the mid-2010s, since there are widebody twinjets with similar range and greater fuel efficiency, giving airlines more flexibility at a lower upfront cost.[100][101][102][103][104][105][106]

Volga-Dnepr signed a memorandum of understanding (MoU) with Boeing for the purchase of 20 more 747-8Fs at the 2015 Paris Air Show.[107] This acquisition was finalized at the 2016 Farnborough Airshow.[108]

On October 27, 2016, UPS announced an order for 14 747-8Fs with options for an additional 14. Deliveries are scheduled from 2017 through 2020.[109]

Design

The 747-8 is a development of the Boeing 747 that takes advantage of improvements in technology and aerodynamics. The two 747-8 variants feature a fuselage stretch of 18.3 ft (5.6 m) over the 747-400, bringing the total length to 250 ft 2 in (76.25 m). The 747-8 is the world's longest passenger airliner, surpassing the Airbus A340-600 by 3.1 ft (0.95 m).[3][110] With a maximum take-off weight of 975,000 lb (442,000 kg),[111] the 747-8 is the heaviest aircraft, commercial or military, manufactured in the U.S.[110]

The General Electric GEnx engine for the 747-8/787 on display at the 2009 Paris Air Show

Compared to the 747-400, the main changes have been on the wings, which have undergone a complete design overhaul. The sweep and basic structure has been kept to contain costs, but the wing is thicker and deeper, with the aerodynamics recalculated. The pressure distribution and bending moments are different, and the new wing for the passenger version holds 64,225 US gal (243,120 L) of jet fuel, and the cargo aircraft 60,925 US gal (230,630 L).[111] The increased wing span makes the 747-8 a Category F size airplane rather than Category E size,[112] similar to the Airbus A380.[113] The new wing features single-slotted outboard flaps and double-slotted inboard flaps.[114]

Raked wingtips, similar to the ones used on the 777-200LR, 777-300ER, and 787 aircraft, are used on the new 747 variant instead of winglets used on the 747-400.[115][116] These wingtip structures help reduce the wingtip vortices at the lateral edges of the wings, decreasing wake turbulence and drag, and thereby improving fuel efficiency. Another effort to reduce weight is the introduction of fly-by-wire technology for the majority of the lateral controls.[12]

The extra fuel capacity in the redesigned wing compared to the 747-400 eliminates the need to significantly change the horizontal tail unit to accommodate auxiliary tanks, further saving costs.[117] The 747-8's vertical tail unit is largely unchanged with a height of 63 feet 6 inches (19.35 m).[111] The wing's trailing edge and raked tip are made of carbon-fiber composites.[118]

The General Electric GEnx is the only engine available for the 747-8. It is one of the two powerplant choices offered for the Boeing 787. The 747 engine variant has been adapted to provide bleed air for conventional airplane systems and feature a smaller diameter to fit on the 747 wing.[119]

Variants

747-8 Freighter

The Boeing 747-8F during flight testing at Everett, Washington

The 747-400 and earlier versions had proven to be a very popular freighter, carrying around half of the world's air freight.[120] To maintain this position, Boeing designed a freight variant of the 747-8, named the 747-8 Freighter or 747-8F. The company launched the freighter version on November 14, 2005.[121] The 747-8F is the initial model to enter service. As on the 747-400F, the upper deck is shorter than passenger models; the 18-foot-3 1⁄2-inch (5.575 m) stretch is just before and just aft of the wing. 747-8 Freighter was designed with a 975,000 lb (442,000 kg) maximum take-off weight with a payload capability of 308,000 lb (140,000 kg) and a range of 4,390 nmi (8,130 km).[122] Four extra pallet spaces were created on the main deck, with either two extra containers and two extra pallets, or three extra pallets, on the lower deck.[20] The 747-8F is expected to have a 16% lower ton-mile operating cost than the 747-400F and offer a slightly greater range.[123]

Cargolux and Nippon Cargo Airlines were the first customers for the 747-8, placing orders for the freighter variant in November 2005.[1] The firm configuration of the aircraft was finalized in October 2006.[124] Major assembly of the aircraft began on August 8, 2008,[16] and the aircraft first left Boeing's Everett factory on November 12, 2009.[125] The first aircraft was delivered on October 12, 2011, to Cargolux.[126] At its six-month service mark, Boeing announced that initial 747-8F operators had achieved a 1-percent reduction in fuel burn over projections.[127]

In June 2015, Boeing predicted new orders for the 747-8F based on its projections of a 4.7% annual increase in air cargo demand.[128]

747-8 Intercontinental

The prototype Boeing 747-8 Intercontinental on a test flight

The passenger version, named 747-8 Intercontinental or 747-8I was formally launched on November 14, 2005, by Boeing.[129] It can carry up to 467 passengers in a typical three-class configuration over a range of 8,000 nmi (15,000 km) at Mach 0.855. The 747-8I can carry 51 more passengers and two more freight pallets with 26% more cargo volume than the 747-400.[123] Despite initial plans for a shorter stretch than the freighter model, the two variants were designed with the same length, increasing passenger capacity.[130] New engine technology and aerodynamic modifications allow longer range. Boeing has stated that compared to the 747-400, the -8I is to be 30% quieter, 16% more fuel-efficient, and have 13% lower seat-mile costs with nearly the same cost per trip.[131] Boeing states that the 747-8I is the world's fastest commercial jet.[132]

Main deck Business Class seating on the 747-8 Intercontinental

For the 747-8, Boeing proposed some changes to the interior layout of the aircraft. The -8I's upper deck is lengthened compared to the 747-400.[133][134] Most noticeable is the curved stairway to the upper deck and a more spacious main passenger entrance.[135] The 747-8's main cabin uses an interior similar to that of the 787. Overhead bins are curved, and the center row is designed to look as though it is attached to the curved ceiling, rather than integrated into the ceiling's curve like on the 777. The windows are also of similar size to the type used on the 777, which are 8% larger than those on the current 747-400s. The 747-8 features a new solid-state light-emitting diode (LED) lighting system, which can create mood lighting.[133]

Boeing 747-8 Intercontinental upper deck staircase and skylight

During the initial 747-8 marketing phase, Boeing also proposed creating a revenue-generating "SkyLoft" passenger facility in the crown space above the cabin. This facility would include "SkySuites", small individual compartments with sliding doors or curtains, featuring beds, seating, and entertainment or business equipment. A common lounge area could also be provided. Boeing also proposed smaller, more modest "SkyBunks". Access to the crown area would be via a separate stairway at the rear of the aircraft. Passengers using the SkySuites, sold at a premium price, would sit in regular economy class seats for take-off and landing, and move to the crown area during flight. However, pricing feasibility studies found the SkyLoft concept difficult to justify. In 2007, Boeing dropped the SkyLoft concept in favor of upper-deck galley storage options, which were favored by the airlines.[136] Outfitting the crown space for sleeping remains an option on VIP aircraft,[137] and the first 747-8 BBJ with AeroLoft was produced in 2012.[138][139]

The first order for the 747-8 Intercontinental was placed by an undisclosed VIP customer in May 2006.[140][141] Lufthansa became the first airline to order the 747-8 Intercontinental on December 6, 2006.[142] In December 2009, Korean Air announced the order of five 747-8Is.[28][29] Boeing stated firm configuration for the −8 was reached in November 2007.[143]

Major assembly of the first 747-8 Intercontinental began on May 8, 2010.[131][144] Assembly of first 747-8I was completed in February 2011, before being unveiled at a rollout ceremony in Everett, Washington on February 13, 2011.[145] At the time, deliveries were planned to begin in late 2011.[146]

Following gauntlet ground testing[146] the 747-8 Intercontinental's first flight occurred on March 20, 2011 from Paine Field in Everett, Washington.[147] The second 747-8I first flew the following month.[59] After the flight test program the 747-8I was FAA certified on December 14, 2011.[148] At that time, −8I deliveries were planned to begin in early 2012.[60][69]

During development testing aeroelastic flutter was observed during a test that measured how the aircraft performed if its wing-to-strut join fitting fails at the same time the fuel tanks in the horizontal stabilizer were filled at over 15% of their capacity.[149] To meet FAA regulations, Boeing reported in January 2012 that 747-8's fuel tanks in the horizontal stabilizers will be closed off to prevent their use until the flutter condition can be resolved;[149] this reduced range by 300–500 nmi (550–930 km).[149] On December 18, 2013, Boeing announced that a series of new performance packages will allow for the reactivation of the tail fuel tanks by early 2014. Older 747-8s can also be retrofitted with them.[150]

The first 747-8 Intercontinental was delivered to a VIP customer on February 28, 2012. It was to be outfitted with a VIP interior before beginning service in 2014.[151] The first 747-8I was delivered in May and began commercial service on June 1, 2012, with Lufthansa.[152]

Presidential aircraft

In 2007, the United States Air Force was seeking to upgrade Air Force One by replacing the Boeing VC-25 (two heavily modified Boeing 747-200Bs acquired in the late 1980s).[153] In 2009, Boeing was reported to be exploring a 747-8 proposal, along with a Boeing 787 Dreamliner variant.[154] In January 2015, the Air Force announced the selection of the 747-8 to replace the aging VC-25A for presidential transport. U.S. Air Force Secretary Deborah Lee James said, "The Boeing 747-8 is the only aircraft manufactured in the United States (that) when fully missionized meets the necessary capabilities established to execute the presidential support mission..."[155][156] In July 2016, Boeing received a second contract for pre-engineering and manufacturing development (EMD) risk-reduction to address "system specification, the environmental control system, the aircraft interior, the electrical and power system and sustainment and maintenance approaches."[157]

On August 1, 2017, Defense One reported that in an effort to pay less for the replacement program, the U.S. Air Force contracted to purchase two undelivered 747-8I ordered by a bankrupt Russian firm (Transaero); the aircraft are stored in the Mojave Desert to prevent corrosion. Boeing and the Air Force will retrofit these aircraft with telecommunications and advanced security equipment for the required security level needed by presidential aircraft.[158]

Operators

In July 2017, there were 106 Boeing 747-8 aircraft in airline service with Lufthansa (19), Korean Air (16), Cargolux (14), Cathay Pacific (14), AirBridgeCargo Airlines (10), Nippon Cargo Airlines (8), Polar Air Cargo (7), Air China (7), Silk Way West Airlines (5), Atlas Air (3), Saudia Cargo (2), and CargoLogicAir (1).[159] Previous operators include Global Supply Systems, a contractor of British Airways.[160]

Orders and deliveries

Boeing 747-8 orders and deliveries by year (to end July 2017)[1]
2005200620072008200920102011201220132014201520162017 Total
Orders18412025157172218-5 133
Deliveries 747-8I–––––––125101133 44
747-8F––––––919199762 71
Total––––––93124191895 115
Boeing 747-8 firm orders and deliveries (to end of July 2017)[1][161][162][163]
Date of
initial order		 Customer 747‑8I
orders		 747‑8F
orders		 Delivered
Nov 15, 2005 Cargolux 14 14
Nov 15, 2005 Nippon Cargo Airlines 8 8
May 30, 2006 Business Jet / VIP 8 8
Sep 11, 2006 Atlas Air 10 10
Nov 30, 2006 Volga-Dnepr Airlines 5 5
Dec 6, 2006 Lufthansa 19 19
Nov 8, 2007 Cathay Pacific 14 14
Dec 7, 2009 Korean Air 10 7 17
Sep 11, 2012 Air China 7 7
Nov 27, 2012 Unidentified customer(s) (Saudia Cargo[164][N 1]) 2 2
Jul 9, 2013 Silk Way Airlines 5 5
Oct 10, 2014 AirBridgeCargo Airlines 7 6
Oct 27, 2016 UPS Airlines 14
Mar 2, 2017 Unidentified customer 1 2
Totals 45 88 115
133

Incidents

On July 31, 2013, an Airbridge Cargo 747-8F experienced core engine icing that caused engine malfunctions and damage to three engines near Chengdu, China, while en route to Hong Kong; the aircraft landed safely at its destination. Boeing and General Electric are working on software changes to mitigate the effects of core engine icing.[165][166][167]

Specifications

Comparison between four of the largest aircraft:
  Boeing 747-8
747-8 characteristics[111]
Variant 747-8 747-8F
Cockpit crew Two
Capacity 410 in 3-class 303,700 lb / 137,700 kg
Exit limit[168] 605 8
Overall length 250 ft 2in / 76.3m
Height 63 ft 6in / 19.4m
Wingspan 224 ft 7in / 68.4m
Wing area 554 m2 (5,960 sq ft)[169]
Wing sweep 37.5°[169]
Aspect ratio 8.45
Cabin width 20 ft (6.1 m)[170]:17
Maximum takeoff weight[170]:7–8 987,000 lb / 447,700 kg
Maximum landing weight[170]:7–8 688,000 lb / 312,072 kg 763,000 lb / 346,091 kg
Maximum zero-fuel weight[170]:7–8 651,000 lb / 295,289 kg 727,000 lb / 329,762 kg
Operating Empty weight[170]:7–8 485,300 lb / 220,128 kg 434,600 lb / 197,131 kg
Maximum structural payload[170]:7–8 167,700 lb / 76,067 kg 292,400 lb / 132,630 kg
Fuel capacity[170]:7–8 63,034USgal / 238,610L
426,109 lb / 193,280 kg		 59,734USgal / 226,118L
400,218 lb / 181,536 kg
Cruise speed Mach 0.86 (493 kn; 914 km/h) Mach 0.85 (488 kn; 903 km/h)
Mach Maximum Operating Mach 0.9 (516 kn; 956 km/h)[168]
Range 7,730 nmi (14,320 km)[171]
BBJ: 8,875 nmi (16,436 km)[172]		 4,120nmi / 7,630 km[173]
Cargo Volume 6,225 cu ft (176 m3) 30,288 cu ft (858 m3)
Ceiling 43,100 ft (13,100 m)[168]
Engines (4×) GEnx-2B67
Thrust (4×) 66,500 lbf (296 kN)

See also

Related development
Aircraft of comparable role, configuration and era

Related lists

References

Footnotes
  1. ↑ The delivery of a 747-8F in March 2013 indicates that the unidentified customer for two -8Fs is Saudia Cargo.[164]
Citations
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