Boeing 747
The Boeing 747, commonly called the Jumbo Jet, is one of the most recognizable modern airliners and is the largest airliner currently in airline service. First flown commercially in 1970, it held the size record for more than 35 years, although it has been surpassed by the Airbus A380 (due to enter service in late 2006). The Ukrainian-built Antonov An-225, a transport, remains the world's largest aircraft.
The four-engine 747, produced by Boeing Commercial Aircraft, uses a two-deck configuration, where the small upper deck is usually used for business-class passengers. A typical three-class layout accommodates 416 passengers while a one-class layout accommodates a maximum of 524 passengers. The hump created by the upper deck has made the 747 a highly recognizable icon of air travel.
The 747 flies at high-subsonic speeds (typically 0.85 Mach or 565 mph or 909 km/h) and features intercontinental range (8,430 statute miles, or 13,570 km, for the 747-400 version). In some configurations this is sufficient to fly non-stop from New York to Hong Kong — a third of the way around the globe. In 1989, a Qantas 747-400 flew non-stop from London to Sydney, a distance of 11,185 miles (18,000 km), in 20 hours and 9 minutes, although this was a delivery flight with no passengers or freight aboard.
By October 2005, a total of 1406 aircraft have been built or ordered in various 747 configurations, making it a profitable product for Boeing [1].
Contents |
History
The 747 was born from the explosion of air travel in the 1960s. The era of commercial jet transportation, led by the enormous popularity of the Boeing 707, had revolutionized long distance travel and made possible the concept of the "global village." Boeing had already developed a study for a very large airplane while bidding on a US military contract for a huge airlifter. Boeing lost the contract to Lockheed's C-5 Galaxy but came under pressure from its most loyal airline customer, Pan Am, to develop a giant passenger plane that would be over twice the size of the 707. In 1966 Boeing proposed a preliminary configuration for the airliner, to be called the 747. Pan Am ordered 25 of the initial 100 series. The original design was a full-length double-decker fuselage. Issues with evacuation routes caused this idea to be scrapped in favor of a wide-body design; a full length double-decker airliner wouldn't exist later on until the appearance of the Airbus A380, which is a double-decker wide-body airliner.
At the time, it was widely thought that the 747 would be replaced in the future with an SST (supersonic transport) design. In a shrewd move, Boeing designed the 747 so that it could easily be adapted to carry freight. Boeing knew that if and when sales of the passenger version dried up (see below regarding the future sales of the 747), the plane could remain in production as a cargo aircraft. The cockpit was moved to a shortened upper deck so that a nose cone loading door could be included, thus creating the 747's distinctive "bulge". The supersonic transports, including the Concorde and Boeing's never-produced 2707, never lived up to expectations, such planes being too expensive to operate profitably at a time when fuel prices were soaring, and also there were difficulties of operating such aircrafts due regulations regarding flying supersonic over land.
The 747's upper deck was initially used as a luxurious first-class lounge/bar area. Now, however, the upper deck is most often used for extra seating capacity. Some say this trend will also happen to the Airbus A380.
The 747 was expected to become obsolete after sales of 400 units. But the 747 outlived many of its critics and production passed the 1,000 mark in 1993. The expected slow-down in sales of the passenger version in favour of the freighter model has only been realized in the early 2000s, around 2 decades overdue.
The development of the 747 was a huge undertaking. Boeing did not have a facility large enough to assemble the giant aircraft, so the company built an all-new assembly building near Everett, Washington. The factory is the largest building by volume ever built.
Pratt and Whitney developed a massive high-bypass turbofan engine, the JT9D, which was initially used exclusively with the 747. To appease concerns about the safety and flyability of such a massive aircraft, the 747 was designed with four backup hydraulic systems, split control surfaces, multiple structural redundancy, and sophisticated flaps that allowed it to use standard-length runways.
Initially, many airlines regarded the 747 with skepticism. McDonnell Douglas (which now has been absorbed by Boeing) and Lockheed, were working on wide-body three-engine "", which were significantly smaller than the proposed 747. Many airlines believed the 747 would prove too large for an average long distance flight, investing instead in tri-jets. There were also concerns that the 747 would not be compatible with existing airport infrastructure, similiar concerns that the Airbus A380 currently faces, however compounded even more due to its double-decker feature.
Another issue raised by the airlines was fuel efficiency. A three-engine airliner burns significantly less fuel per flight than a four-engine, and with airlines trying to lower costs, fuel efficiency was an important issue that would briefly return to haunt Boeing in the 1970s.
Boeing had promised to deliver the 747 to Pan Am by 1970, meaning that it had less than four years to develop, build and test the airplane. Work progressed at such a breakneck pace that all those who worked on the development of the 747 were given the nickname "The Incredibles". The massive cost of developing the 747 and building the Everett factory meant that Boeing had gambled its very existence on the 747's success, and the company was nearly bankrupted in the early 1970s.
The gamble paid off, however, and Boeing enjoyed a monopoly on being the only airline manufacturer that built very large passenger transports. That record would only be broken more than 35 years later with the advent of the Airbus A380.
Variants
The 747 exists as several models:
747-100
The first model of the jet, the 747-100, rolled out of the new Everett facility on 2 September 1968. The prototype, named "City of Everett", first flew on 9 February 1969, and on 1 January 1970 the 747-100 entered service with launch customer Pan American World Airways. It was later replaced by the 747-100B, a very similar aircraft with a stronger airframe and undercarriage design. The basic 100 has a range of about 4,500 miles (7,200 km) with full load. The US miliary designation for 747-100 is C-19.
Boeing also developed the 747-SR as a 'Short Range' variant of the -100. The SR has a lower fuel capacity, but can carry more passengers--up to 498 passengers in early versions and 550 passengers in later models. This aircraft was primarily used on domestic flights in Japan, but one 747-SR46 (N911NA) is currently being operated by NASA as a Space Shuttle Carrier Aircraft (it replaced an ex-American Airlines 747-123 in 1990).
The very first 747-100s off the line were built with three upper-deck windows to accommodate upstairs lounge areas. A little later, as airlines began to use the upper-deck for premium passenger seating instead of lounge space, Boeing offered a ten window upper deck as an option, and it quickly became the standard. Some 100s were even retrofitted with the new configuration. A few -100SRs serving with Japan Airlines had their upper decks stretched to accommodate more passengers. This is known as the stretched upper-deck or "SUD" modification.
Some 747-100 aircraft were converted into freighters and designated 747-100SF.
747-200
Introduced in 1971, and further improved over successive years, the 747-200 had more powerful engines and higher takeoff weights than the -100, allowing it to fly further. A few early build -200s retained the three window configuration of the -100, but most were built with a ten window configuration. As on the -100, a stretched upper deck modification was offered much later. KLM remains the only airline to retrofit their -200s with the SUD option. The last models of the 200, the 200B, built in the late 1980s, have a full load range of about 6,700 miles (10,800 km). The US military designation for 747-200B is C-25. The USAF only operates two C-25, in VIP configuration (VC-25A). These two aircrafts, tail numbers 28000 and 29000 are better known as Air Force One when the President of the United States is onboard.
The 747-200C Convertible and 747-200F Freighter variants were designed to carry . The 747-200F is a pure freighter, while the 747-200C is a "convertible" aircraft that can carry either passengers or freight. A sub-variant is unofficially called the 747-200M and is a "combi" aircraft that can carry both at the same time. Like the 100, many 200s have been given a new lease on life as freight aircraft.
The 747-200B is an improved version of the 747-200, with increased fuel capacity and more powerful engines. It comes in a combi version as well.
747SP
The 747SP, or "Special Performance," was first delivered in 1976. The SP was largely a stop-gap model to compete with the McDonnell Douglas DC-10 and Lockheed L-1011. The 747 was simply too big for many routes, and Boeing did not have a mid-sized widebody to compete in the segment of the market that the DC-10 and L-1011 had created. Crippled by the huge costs it had incurred in developing both the 737 and 747 in the late 1960s, Boeing could not afford to develop an all-new design, so instead it shortened the 747 and re-optimized it for speed and range at the expense of capacity.
Apart from having a shorter fuselage, the 747SP differs from other 747 variants in having a larger tail surface and larger single-piece flaps on the (other 747s use triple flaps). The SP could typically only accommodate 220 passengers in a 3-class cabin, but could fly over 6,500 miles (10,500 km) at speeds of up to 610 mph (980 km/h). Some airline insiders call it the "74 Short" or "Baby Jumbo" because of its shortened fuselage, and stubby appearance. Originally designated 747SB (standing for Short Body), by Boeing, the airlines had Boeing change the production designation to 747SP.
The 747SP was the longest-range airliner available until the Airbus A340, and found its way into the fleets of American Airlines and Pan Am, airlines that needed its range for trans-South Pacific routes (American later used its 747SPs for services to Tokyo). Pan Am also used their 747SPs on their trans-pacific flights to and from Hong Kong. Prior to the 1979 Islamic revolution Iran Air used the type on their daily Tehran-New York flight, at the time the longest non-stop airline route in the world. The 747SP was also used by Qantas and South African Airways on flights from Johannesburg to London, during the Apartheid years, when that airline's aircraft were not allowed to fly over African countries and had to fly around the Bulge of Africa. The extra range allowed aircraft to cover the additional distance. With seven of these jets, SAA had the largest fleet of 747SP's in the world at the time.
For all its technical achievements, the SP never sold as well as Boeing hoped. Only 45 were ever built and most that are still in service are used by operators in the Middle East.
One special 747SP is the SOFIA astronomical observatory, where the airframe was modified to carry a 2.5-meter-diameter infrared reflecting telescope to high-altitude, the limit to which infrared penetrates the atmosphere. Originally delivered to Pan Am and titled "Clipper Lindbergh", NASA has displayed the name in Pan Am script on the plane. It will fly again in late 2005.
747-300
The first incarnation of the 747-300 would have been a trijet version of the 747SP, intended to compete with the DC-10 and L-1011 TriStar. This plan was scrapped due to insufficient demand.
The 747-300 name was revived for a new aircraft, which was introduced in 1980, and was the first 747 model to feature a "stretched upper deck," which increased its capacity over earlier models. Combi (747-300M) and Japanese domestic (747-300SR) models were also built. The upper deck was now accessed via a straight staircase, rather than the spiral steps that featured in the 100 and 200. The maximum range of a 747-300 is 7,700 miles (12,400 km).
Airlines currently operating a large number of this type are JAL, Air India, Saudi Arabian Airlines, Pakistan International Airlines (PIA), Qantas, Korean Air, Crossair and Thai Airways.
747-400
The 747-400 is the latest model of the 747, and also the only series still in production. It added 6ft(2m) wing tip extensions and 6ft(2m) winglets, an all-new glass cockpit which dispensed with the need for a flight engineer, tail fuel tanks, revised engines, an all-new interior, and newer in-flight entertainment to the basic design of the -300 series. It first entered service in 1989 with Northwest Airlines. China Airlines is the first airline to take the new "Signature Interior" with the China Airlines/Boeing livery 747-400, the aircraft entering service in 2005.
The -400 is available in the all passenger, combi (747-400M) and freighter (747-400F and 747-400SF) variants. The Japanese domestic variant, the 747-400D, is the highest-capacity passenger aircraft in the world, and will be until the Airbus A380 officially enters service. The -400D lacks the wing tip extensions and winglets included on other variants, allowing for increased number of takeoffs and landings by lowering wing stresses. The -400D may be converted to the long range version when needed. The US military designation for 747-400 is C-33.
The 747-400ER is 400's extended range version: it also comes in an all-freight version, the 747-400ERF.
747 Large Cargo Freighter
Boeing announced in October 2003 that due to the high cost of shipping, that air transport will be the primary method of transportation for 787 parts (as opposed to shipping). Boeing will convert three passenger 747-400 aircraft into an outsize configuration, in order to ferry sub-assemblies to Everett, Washington for final assembly. It has a bulging fuselage like the Super Guppy or Airbus Beluga cargo planes used for transporting wings and fuselage sections.
Delivery times for the wings — built in Japan — will be reduced from around 30 days to one day with the 747 LCF. The Large Cargo Freighter can hold three times the volume of a 747-400F freighter. (See: Boeing news releases [2], [3], [4]).
747-8
Boeing announced a new 747 model, the 747-8 (referred to as the 747 Advanced prior to launch) on November 14, 2005, which will use same engine and cockpit technology as the 787 (They decided to call it the 747-8 because of the technology it will share with the 787, also called Dreamliner). Boeing claims that the new design will be quieter, more economical and more environmentally friendly. The passenger version (dubbed 747-8 Intercontinental) will be capable of carrying up to 450 passengers in a 3-class configuration and fly over 8,000 nautical miles (14,816 km) at .86 Mach. As a derivative of the already common 747-400, the 747-8 has the economic benefit of similar training and interchangeable parts.
British Airways, Japan Airlines and Cathay Pacific are viewed as potential 747-8 operators, given their historical links with Boeing and the fact that none of whom have purchased the Airbus A380 as of yet. British Airways CEO Willie Walsh has said he is glad the airline has not ordered the A380. [5] On July 27, 2005, Cargolux announced [6] its desire to buy a minimum of ten 747-8F Freighters for delivery in 2009, with options for 10 more. On the launch date, Nippon Cargo Airlines ordered eight 747-8Fs. Nippon currently operates 13 747 freighters, with six 747-400Fs currently on order.
Before the official launch of the 747-8, Boeing had plans to develop other variants of existing 747 models under the names 747X (Experimental) and 747-400XQLR (Experimental Quiet Long-Range). These designations were dropped in favor of a 747 Advanced program, which evolved into the 747-8.
Specification changes
The 747-8 will be 74.3 meters long (stretched 3.6 m compared to the baseline 747-400), allowing it to carry 34 more passengers and two more freight pallets. New engine technology and aerodynamic modifications extend range to 8,000 nautical miles (14,803 km), allowing non-stop flights such as Frankfurt – Buenos Aires, Hong Kong – New York or Sydney – Dallas/Fort Worth.
For the time being, General Electric will be the exclusive engine power plant for the 747-8, with their GEnx engine. Similar to the GEnx offered on the 787, the 747 variant will be adapted to provide bleed-air for conventional aircraft systems and feature a smaller diameter to fit on the 747 wing. Some use of composites will be made so as to reduce weight, however structural changes will mostly be evolutionary with respect to the 747-400, and not revolutionary. The 747-8 will feature an entirely new wing with increased aerodynamics, similar to that of the 787. It will have single-slotted outboard flaps and double-slotted inboard flaps. Raked wingtips, similar to the ones currently on the 777-200LR and 777-300ER models and the 787-8 and 787-9 design, will replace the winglets on the 747-400. These structures help reduce the wingtip vortices at the lateral edges of the wings, decreasing drag and thereby increasing fuel efficiency.
Interior changes
For the 747-8, Boeing has proposed some changes to the interior layout of the aircraft. Most noticeable will be the stairway to the upper deck. On present 747-300 and -400 models, the stairway is straight, narrow, and runs from the galley area located at door 2 (the second door from the front of the aircraft), to the back of the upper deck, on the left hand side. The 747-8 model proposes a sweeping curved stairway which will open onto the door 2 entry lobby, and rise up to the right hand side of the back of the upper deck. The window line will be extended to where the stairway reaches the upper deck, and a further set of windows may be placed overhead.
Further down the aircraft, it has been proposed to put 'SkySuites' in the crown area (the space above the passenger cabin, currently used for airconditioning ducts and wiring). The wiring and ducts will be moved to the side to create space for these facilities — consequently they will not have windows. The SkySuites will be small individual compartments with sliding doors or curtains, and which may feature beds, seating, and entertainment or business equipment. A common lounge area would also likely be provided. Boeing has 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, which will be sold at a premium price, will sit in regular economy class seats for take off and landing, and move to the crown area during flight.
It is not known how many other 787 interior features will be used on the 747-8. The windows will of be similar to the type used on the 777, which are larger than that on existing 747s. lighting. The747-8 will feature a new solid-state light emitting diode (LED) lighting system. It will be possible to create various moods in the cabin, from sunrise to sunset, making travel a more comfortable and relaxing experience. At the same time, LED technology offers additional advantages regarding lower maintenance costs and longer intervals between unscheduled repairs.
Freighter
The 747 has proven to be a very popular freighter, and Boeing is planning a freight variant of the 747-8, which will be the initial model to see entry into service (EIS.) The freighter version would be stretched a further 5.1 m more than the passenger model, with a 422 ton maximum takeoff weight, which would allow it to carry 130 tons of cargo over 8,260 km. Four extra pallet spaces would be created on the main deck, while the lower deck would be able to hold two extra containers and two extra pallets. Cargolux has ordered 10 747-8F Freighters with an EIS of , with Nippon Cargo Airlines' purchase of eight the second launch order.
Orders
Date | Airline | EIS | Type | ||
---|---|---|---|---|---|
747-8I | 747-8F | Options | |||
November 14, 2005 | Cargolux | 10 | 10 | ||
November 14, 2005 | Nippon Cargo Airlines | 8 | 6 | ||
Sub-totals | 0 | 18 | 16 | ||
Totals | 18 |
Potential customers
Many airlines have shown interest in the new 747-8. However there have been no commitments for the passenger model. Possible customers could include the following:
Government and military
The current U.S. presidential aircraft, VC-25A, is among the most famous 747 models. It is popularly known as Air Force One, although that name technically refers to any United States Air Force aircraft carrying the President. VC-25A is based on the civilian 747-200, though it contains many of the innovations introduced on the 747-400 (such as an updated flight deck and engines.) Other special 747s include the E-4B National Emergency Airborne Command Post (referred to colloquially as "Kneecap"), modified 747s to transport the Space Shuttle (Shuttle Carrier Aircraft), and aerial refueling tankers. A recent addition to the military's 747 arsenal is the experimental Airborne Laser, a component of the National Missile Defense plan. T/Space is also planning to use a 747 for its CXV space capsule proposal.
A number of other governments also use the 747 as a VIP transport, including Bahrain, Iran, Japan, Oman, Qatar, Saudi Arabia, Taiwan, and the United Arab Emirates.
Powerplants
(For the last versions of each series offered)
- 747-100
- four Pratt & Whitney JT9D-7A turbofans
- 747-200/300
- four Pratt & Whitney JT9D-7R4G2 turbofans or
- four Rolls-Royce RB211-524D4 turbofans or
- four General Electric CF6-50E2 turbofans
- 747-400
- four Pratt & Whitney PW4062 turbofans or
- four Rolls-Royce RB211-524H turbofans or
- four General Electric CF6-80C2B5F turbofans
- 747-8
- four General Electric GEnx turbofans
Technical data
Measurement | 747-100 (initial version) | 747-400ER (current version) | 747-8 Intercontinental[7] |
---|---|---|---|
Length | 70.7 m | 70.7 m | 74.2 m |
Span | 59.6 m | 64.4 m | 68.5 m |
Height | 19.3 m | 19.4 m | 19.4 m |
Wing area | 511 m² | 541 m² | ? |
Weight empty | 162.4 t | 180.8 t | ? |
Maximum take-off weight | 340.2 t | 412.8 t | 435.4 t |
Cruising speed | .85 Mach | .855 Mach | .86 Mach |
Maximum speed | .89 Mach | .92 Mach | .92 Mach |
Range fully loaded | 9,040 km | 14,200 km | 14,815 km |
Cargo capacity | 170.6 CBM (5 pallets + 14 LD1s) | 158.6 CBM (4 pallets + 14 LD1s) | 275.6 CBM (8 pallets + 16 LD1s) |
Engines (example) | 4 × Pratt & Whitney JT9D, 209 kN thrust each | 4 × General Electric CF6-80, 274 kN thrust each | 4 × General Electric GEnx-2B67, 296 kN thrust each |
Cockpit Crew | Three | Two | Two |
Facts & trivia
- A 747-400 has six million parts (half of which are fasteners) made in 33 different countries.
- Just one engine on a 747 produces more thrust than all four engines on an early model Boeing 707 combined.
- When pressurized, a 747 fuselage holds over a ton of air.
- The 747-400 is about 25 percent more fuel efficient than the 747-100, and twice as quiet.
- Early model 747s have more than 700lbs (300 kg) of depleted uranium molded into the engine nacelles. Its purpose is as ballast to prevent the wing from fluttering.
- One of the original 747 design proposals was a full double decker, similar to the Airbus A380. Boeing dropped the idea at the eleventh hour, arguing that a wide single decker would be both more economical to operate and safer.
- During the flight certification period, Boeing built an unusual training device known as "Waddell's Wagon" (named after the 747 test pilot, Jack Waddell) which consisted of a mock-up cockpit mounted on the roof of a truck. It was intended to train pilots on how to taxi the aircraft from the high upper deck position.
- At the time of its launch, the term "jumbo jet" had already been coined by the media to describe a general class of new wide-bodied airliners then being developed, including the Lockheed L-1011 TriStar and Douglas DC-10. Boeing was quite keen to discourage the media and the public using the term "jumbo jet" for the 747, but their efforts were in vain, and now the term is synonymous with the 747.
- The 747SP was originally intended to be known as the 747SB (the SB logically standing for "Short Body", before it was nicknamed "Sutter's Balloon" by Boeing employees, being named after 747 chief engineer Joe Sutter). Eventually the name "Special Performance" was used instead.
- Due to its immense length, there is a very small flexure of the fuselage in flight. This effect was not anticipated in the design of the autopilot on early models, and so there is a very slow oscillation in yaw when flying on autopilot. This was first discovered on an overseas flight to the Paris Airshow, when some of the people in the rear got air sick. Upon return, the plane went through a shake test for two weeks to sort out the problem and adjust the yaw damper system. This solved the problem and the effect is now too small to be noticeable by passengers.
- To enable easy transportation of spare engines between sites by airlines, early 747s include the ability to attach a non functioning fifth-pod engine under the port wing of the aircraft, between the nearest functioning engine and the fuselage. Photographs of planes flying in this configuration are highly prized by aircraft enthusiasts. [8] [9]
- There are other aircraft with prominent humps on the upper fuselage including the Carvair, which was built from 1961 to 1969. Its most notable appearance is in the 1964 James Bond movie Goldfinger.
- In the 1970's 747 pilots nicknamed the Jumbo Jet, "The Queen of the Skies" because of its huge size and capacity.
Preserved aircraft
As increasing numbers of 'classic' 747-100 and 747-200 series are retired, some are finding their way into aircraft museums. They include:
- Boeing 747-100 N7470, "City of Everett", the first 747 prototype Museum of Flight, Seattle, Washington, USA
- KLM 747-200(SUD) PH-BUK "Louis Blériot" at , Lelystad, Netherlands
- Qantas 747-200 VH-EBQ "City of Bunbury" at Longreach Airport, Longreach, Queensland, Australia
- South African Airways 747-200 ZS-SAN "Lebombo" and 747SP ZS-SPC "Maluti" at Rand Airport, Johannesburg, South Africa
- Lufthansa 747-200 D-ABYM "Schleswig-Holstein" at , Speyer, Germany
- Air France 747-100 F-BPVJ at Musée de l'Air et de l'Espace, Le Bourget airport, Paris, France
Disasters
Specific accidents
The 747 has been involved in a number of air disasters. However, very few have been due to design flaws in the aircraft itself: as with most air accidents, most have been because of pilot error, improper maintenance, or in a few cases, terrorist or military action.
- Lufthansa flight 540, Nairobi, 1974
- Tenerife Airport Disaster, 1977
- Air-India flight 855, Arabian Sea, 1978
- Korean Air flight 007, Sea of Okhotsk, 1983
- Avianca flight 011, Madrid, 1983
- Air-India flight 182, Atlantic Ocean, 1985
- Japan Airlines flight 123, Tokyo, 1985
- South African Airways flight 295, Indian Ocean, 1987
- Pan Am flight 103, Lockerbie, 1988
- United Airlines Flight 811. Honolulu, 1989
- China Airlines flight 358, Taiwan, 1991
- El Al cargo flight 1862, Amsterdam 1992
- Philippine Airlines Flight 434, Okinawa, 1994
- TWA Flight 800, Long Island, 1996
- Saudia flight 763, Delhi, 1996
- Korean Air flight 801, Guam, 1997
- Singapore Airlines Flight 006, Taipei, 2000
- China Airlines flight 611, Penghu Islands, 2002
Accident summary
See Aviation Safety Network for authoritative figures.
- Hull-loss Accidents: 33 with a total of 2850 fatalities
- Other hull-loss occurrences: 6 with a total of 857 fatalities
- Hijackings: 30 with a total of 22 fatalities
Airlines
Most international airlines use the 747 on their busiest routes. However, as point-to-point international service between midsize cities has become more common, some major airlines have replaced their 747s with smaller and more efficient twinjet aircraft. American Airlines, and Continental Airlines are among the larger carriers to discontinue the 747. Other airlines that have removed the type from their fleet include Air Canada, Aer Lingus, SAS, TAP, and Olympic Airways.
The largest fleet of 747s belongs to Japan Airlines, at approximately 73 (series -200s, -300s and 44 -400s). British Airways has the largest fleet of 747-400s at 57.
Development studies
Many different stretching schemes for the 747 have been proposed, but the only design to be adopted is 2005's 747-8.
The 747-X program was launched in 1996 as Boeing's response to the Airbus A3XX proposal. The 747-X would have consisted of the 747-500X and 747-600X, seating up to 800 passengers. General Electric and P&W formed the Engine Alliance and designed the GP7200 turbofan to power the stretched 747. Airlines, however, would have preferred Boeing to develop an all-new design instead of an updated 747, and the plan was dropped after a few months.
After the Airbus A380 was formally launched in 2000, Boeing reexamined its 747-X studies but instead devoted its energies to the Sonic Cruiser, and then later on the 787 after the Sonic Cruiser program was put on hold for an undefine time. Some of the ideas developed for the 747-X were, however, used in the production of the 747-400ER.
In early 2004, Boeing rolled out tentative plans for what it called the 747 Advanced. Similar in nature to the 747-X plans, the stretched 747 Advanced uses advanced technology from the 787 to modernize the design and its systems. On November 14, 2005, Boeing announced it was launching the 747 Advanced as the 747-8. [10]
Eventually, the 747 (in all forms) will be replaced by a clean-sheet aircraft dubbed "Y3".
Related content
Giant aircraft |
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Designation sequence:
Related development:
Similar aircraft:
External links:
- Boeing.com
- Boeing 747 e-brochure - Flash animation
- Airliners.net - Boeing 747-100 & 200
- Airliners.net - Boeing 747-300
- Airliners.net - Boeing 747-400
- Airliners.net 747 images
- Boeing 747SP Website
- Calipso: Boeing 747 Information & History
- Aircraft-Info.net - Boeing 747-400
- Planemad.net - Boeing 747 Production Lists
- Boeing 747 Family - 747 Classics (100, 200 and 300)
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