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Boeing 747 jumbo jet turns 50

bigdog

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http://www.traveller.com.au/boeing-747-jumbo-jet-turns-50-but-its-future-remains-uncertain-h1b3bk

Boeing 747 jumbo jet turns 50, but its future remains uncertain

In the skies above Washington state, 50 years ago, the Boeing 747 performed its first turns. The debut flight - despite a minor problem with one of the wing's flaps - was counted as a success, and the course of air travel history was changed for good.

The original Jumbo Jet, the Queen of the Skies, the bubble-topped Boeing: in the Seventies the 747's vast size made long-haul travel a viable option for the masses for the first time. Since that February morning in the north-west of America (that aircraft, the RA001, can today be seen at Seattle's Museum of Flight), more than 1500 of the aircraft have been built, serving the world's airlines tirelessly.

"It's not a stretch to consider the advent of the 747 as the most crucial turning point in the history of civil aviation," writes author and pilot Patrick Smith in his book Cockpit Confidential.

But here, half a century later, the 747 is disappearing from the skies as the likes of Qantas, British Airways, Virgin Atlantic and Lufthansa phase them out in favour of newer planes; yet still the production plant rumbles on, with newer variations and an increased desire for the jet as a cargo aircraft.

There is, however, no denying that the sun is setting one of the most iconic aircraft ever developed. Its humped front and staggering tail have become the casual blueprint for many an imagining of air travel, despite no other plane looking like it. It carries with it a romance like no other.

"The plane looks less like an airliner than it does an ocean liner in the classic QE2 mold," says Smith. "[It] is arguably the most impressive and inspirational work of art - call it industrial art, if you must - ever produced by commercial aviation."

Beyond its pin-up potential, the 747 has meant a lot to many passengers over the years.

"There's always love and happiness and excitement in the cabin," says senior first officer Bernice Moran, who flew the 747, which she describes as "beautiful, gracious", for Virgin Atlantic. "Because we fly it on our leisure routes, it's always so special to see families and newlyweds on the plane. Any passenger that I've spoken to over the last 12 years has felt blessed to fly on such an iconic aircraft."

Bernice said she first saw a 747 as a child as it came into land at Dublin Airport, near where she grew up. "Sometimes I'm in disbelief that I've been given this 300 tonne jet to fly," she says. "It's one of the airplanes that most pilots would dream to fly and I have been lucky enough to fly it."

How long does the 747 have left?
While there remain many in the skies today, hundreds more have been scrapped. Qantas will phase out its remaining 747s by 2021, while British Airways has said it will have bid farewell to its last 747 by 2024, both welcoming a new age of airliners, such as the 787 Dreamliner and A350. Virgin Atlantic, too, is set to replace its 747s with the Airbus A350-1000.

Singapore Airlines was one of the first carriers to stop flying 747s, with its last jumbo jet making its final flight in 2012.

Demand for the 747, which has been tweaked and upgraded many times since its first flight in 1969, has dried up. Only 18 orders were received last year and it is expected that Boeing will be forced to call time on the jumbo jet before long.

That said, it was only in 2017 that the US government asked Boeing to repurpose two 747-8 aircraft for use as Air Force One. The aircraft are due to be delivered by the end of 2024.

Where do unwanted 747s go?
With airlines keen to keep their fleets as modern and fuel efficient as possible, and air forces eager to take advantage of new technology, the shelf life of a plane is shorter than you'd think. Where do they go when they are retired? The chances are they will end up at one of the world's vast aircraft graveyards.

There are dozens of facilities around the world where retired planes are kept in storage or to have their parts removed and reused or sold. The first such graveyards, or "boneyards" in US parlance, were established after the Second World War, when militaries found themselves with huge aircraft surpluses.

The largest is the 309th Aerospace Maintenance and Regeneration Group at the Davis-Monthan Air Force Base in Tuscon, Arizona, where almost 5000 have been left to gather dust.

Aircraft graveyards can also be found beyond US shores, in Alice Springs Airport, Northern Territory, Australia; Manas International Airport in Bishkek, Kyrgyzstan; Teruel Airport in Aragon, Spain; and Tarbes–Lourdes–Pyrénées Airport in France.

The Telegraph, London
 
The top deck is business
Last flight back from UK
91 and 92 rough all the way back to Singapore
 
A380 - My favorite aircraft, so quiet and comfortable, sad that Airbus cant sell enough of them.

The A380 was built for a business model that is dying eg the hub and spoke model.

Smaller long range aircraft flying point to point without the need for connections is the future.
 
http://www.traveller.com.au/everyone-asks-why-was-the-boeing-747-designed-with-a-hump-h16kdu

Boeing 747: Why the jumbo jet was designed with a hump and four more things you didn't know about the plane


On February 9, 2019, it will be 50 years since the first Boeing 747 took to the skies. Since its first passenger flight, in 1970, it has become the most successful commercial jet aircraft built. More than 1500 747s have rolled out of Boeing's Everett production facility, they've carried more than 3.5 billion passengers and flown the equivalent of 70,000-plus trips to the moon and back. Chances are you've flown aboard a 747 several times, yet there are a few things about the aircraft that might come as a surprise.



Boeing's 747 was conceived as a multi-purpose aircraft, both as a passenger carrier and a cargo aircraft. In the 1960s, when the 747 was on the drawing boards, it was believed that supersonic aircraft were the future of passenger flights. If that proved the case, the 747 might be relegated to the role of a heavy-duty cargo aircraft.

To allow for that option the 747 was designed with a flip-up nose with a hinge at the top making it possible to load and unload even large cargo items quickly. However, the cockpit was in the way so designers added the hump and put the cockpit up there. The most aerodynamic design proved to be a teardrop-shaped hump and that gave the 747 its upper level. And as history proved, the 747 turned out to be one of the most successful aircraft that ever flew, while supersonic flight failed to gain traction.

A revolutionary power plant
The Boeing 747 was the first aircraft to be fitted with high-bypass turbofan jet engines. Turbofan engines, in which most of the air that enters the intake bypasses the core engine where combustion takes place, began replacing the far smaller turbojet engines on commercial aircraft in the 1960s.

These were low-bypass turbofans, which produce more jet thrust relative to fan thrust. High-bypass turbofans produce greater fan thrust relative to their jet thrust. They're also quieter – anyone who lives under a flight path can hardly forget the screaming jet engines of the past – they're more powerful and they offer improved fuel efficiency.

After a design competition, Pratt & Whitney was awarded the contract for the 747's engines and developed the JT9D engine. The JT9D produced 43,500 pounds of thrust, more than twice that of the engines used to power the Boeing 707 or Douglas DC-8, the workhorses of the day. Built extensively from titanium and nickel alloys, the JT9D was the precursor of the high-bypass turbofan engines that power all larger modern commercial jet aircraft but the test phase was hampered by engine stalls and damage to the turbine casings.

Boeing's up-front investment in the 747 totalled more than $1 billion, yet constant injections of bank funds were required to keep the project alive. Boeing eventually took on a debt of more than $US2 billion to develop the 747, leaving it burdened with more debt than any other corporation in history at the time. In today's terms, that would be close to $US14 billion.

As time would tell, Boeing's huge gamble paid massive dividends, and the company held a stranglehold on the production of supersize passenger aircraft until the arrival of the A380, which carried its first passengers in 2007, 37 years after the 747 took paying passengers into the skies.



The 747 has long been the favoured long-distance conveyance for some heads of state, the big timers as well as those with an inferiority complex, plus a few crackpot dictators. As well as the heads of state of China and Japan, the rulers of Kuwait, Brunei, Oman and Morocco all have Boeing 747s in their executive fleet.

Former President Saddam Hussain had a personal Boeing 747SP, the stubby, long-range version, for his personal travels.

The most famous of all the presidential 747s is Air Force One, used by the US president, which joined the ranks of the executive fleet in 1990 during the administration of George H.W. Bush. That aircraft boasts a number of refinements that you won't find on a typical 747. The triple-deck aircraft includes a suite for the president with a large office, bathroom and conference room, a medical suite that can function as an operating room, with a physician permanently on standby and two galleys that can feed 100 people at a time.

The onboard electronics, hardened against an electromagnetic pulse, enable the US president to continue to perform his or her duties in the event of an attack on the US.

Plans to replace the original presidential 747s were scuttled by Donald Trump when he balked at the replacement cost – almost $US4 billion. Instead the president will get a pair of almost-new Boeing 747-8 aircraft, originally destined for Russian carrier Transaero until that airline went bankrupt.



As well as ferrying billions around the globe, 747 aircraft have been called upon to perform some unusual duties. A 747 was officially designated a Space Shuttle Aircraft and used to "piggyback" the Space Shuttle between its landing sites and the Kennedy Space Centre. It was the first Shuttle Carrier Aircraft, SCA 905, that carried the Space Shuttle Enterprise aloft and released it mid-flight, allowing it to glide and land under its own control.



The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an airborne observatory housed in a radically modified Boeing 747SP. A joint project of NASA and the German Aerospace Centre, the SOFIA 747 carries a 2.7-metre reflecting telescope designed for infrared astronomy. The telescope is revealed at cruise altitude, when a large door opens in the aft section of the aircraft.

The German Aerospace Centre defines SOFIA's role as "to understand the development of galaxies and the formation and evolution of stars and planetary systems from interstellar clouds of gas and dust". At ground level, water vapour in the troposphere hinders observations in the infrared. By flying in the dry, blue skies at altitudes above 12 kilometres, SOFIA's 747 escapes almost all our planet's atmospheric water vapour. Nightwatch is a military program with the official title of E-4 Advanced Airborne Command Post, which uses four Boeing 747 aircraft.

These aircraft serve as survivable mobile command posts in the skies for the US president and the secretary of defence, a strategic command and control centre that allows the United States military to continue to fight even after a devastating nuclear ground attack. When the president travels outside North America, an E-4 is deployed to a nearby airport, just in case the call comes.
 
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