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Boeing 747

Boeing 747
British Airways Boeing 747-400 taking off
Role Wide-body, long-range jet airliner
National origin United States
Manufacturer Boeing Commercial Airplanes
First flight February 9, 1969[1]
Introduction January 22, 1970 with Pan Am[1]
Status Being used by airlines
Primary users British Airways
United Airlines
Lufthansa
KLM
Produced 1968–present
Number built 1,458 as of December 2012[2]
Unit cost 747-100: US$24 million (1967) 747-200: US$39 million (1976)
747-300: US$83 million (1982) 747-400: US$228–260 million (2007)
747-8I: US$351.4 million[3] 747-8F: US$352 million
Variants Boeing 747SP
Boeing 747-400
Boeing 747-8
Boeing VC-25
Boeing E-4
Developed into Boeing YAL-1
Boeing 747 Large Cargo Freighter

The Boeing 747 is a jet airliner. It is made by Boeing Commercial Airplanes. The Boeing 747 has more than one aisle, which means it is a wide-body aircraft. It is often called the Jumbo Jet or Queen of the Skies. The Boeing 747 is one of the easiest planes in the world to recognise.[4] It was the first wide-body aircraft ever made. The first type of 747 was two and a half times the size of the Boeing 707.[5] The Boeing 747 made its first flight for an airline in 1970. The 747 could carry more passengers than any other aircraft for 37 years, until the Airbus A380 was made.[6]

The 747 is a double deck plane. It can carry passengers, cargo and many other things. Boeing designed the 747's upper deck to be a first class lounge or just extra seats. They also designed the upper deck so that the aircraft could be changed into a cargo plane easily. This was done by removing seats and putting in a cargo door at the front of the plane. Boeing did this because they thought that supersonic airliners would become much more popular than the 747 and other subsonic airliners. However, they thought that subsonic cargo planes would always be popular.[7] It was thought that the 747 would become unpopular after 400 were sold.[8] However, 1,000 planes had been made by 1993, so it stayed popular.[9] By September 2012, 1,448 aircraft had been built. 81 747-8s were still waiting to be built.[2]

The 747-400 is one of the fastest airliners being used today. It usually flies at Mach 0.85–0.855 (up to 570 mph, 920 km/h). It can fly for 7,260 nautical miles (8,350 mi or 13,450 km).[10] The newest version of the 747, the 747-8, is now being made.

The 747 will be replaced by the Boeing Y3 (part of the Boeing Yellowstone Project) eventually.

Development

Background

In 1963, the United States Air Force began to look for a very big plane to transport things. At that time, the C-141 Starlifter was being used. However, the Air Force thought that a much bigger plane which could carry more cargo was needed. The Air Force called the big plane the CX-Heavy Logistics System (CX-HLS). It needed to be able to carry 180,000 pounds (81,600 kg) of cargo and travel at Mach 0.75 (500 mph or 805 km/h). It also had to be able to fly for 5,000 nautical miles (9,260 km) while carrying 115,000 pounds (52,200 kg) of cargo. The cargo bay had to be 17 feet (5.18 m) wide, 13.5 feet (4.11 m) high and 100 feet (30.5 m) long. There had to be doors for the bay at the front and the back of the plane.[11]

The Air Force also wanted the plane to have only four engines. This meant that new engines had to be made. On May 18, 1964, Boeing, Douglas, General Dynamics, Lockheed and Martin Marietta designed a plane. General Electric, Curtiss-Wright and Pratt & Whitney designed the engines. The Air Force liked Boeing, Douglas and Lockheed's designs. They also liked General Electric and Pratt & Whitney's engine designs.[11]

In 1965, Lockheed's plane and General Electric's engines were used for the C-5 Galaxy. At that time, it was the biggest military cargo plane in the world.[11]

Airliner

The idea for the 747 was thought of in the 1960s.[12] Jets like the Boeing 707 and Douglas DC-8 had made it easy to travel long distances.[12][13] Juan Trippe from Pan American World Airways (Pan Am), asked Boeing to build a plane which was more than two times bigger than the Boeing 707. At this time, airports were very busy. Trippe thought that a big plane could help make them quieter.[14]

In 1965, Joe Sutter was told to design this new plane. It was called the 747.[15] Sutter asked Pan Am and other airlines what they would like from the plane. At the time, it was thought that supersonic aircraft would replace the 747.[16] Because of this, Boeing made the 747 so that it could easily be turned into a cargo plane if the passenger version became less popular.

An Iran Air 747-200 cockpit

Use by airlines

The very first time a 747 was used by an airline was on January 22, 1970. Pan Am used it to fly from New York to London.[47] The flight was supposed to happen on the evening of January 21. However, the engines on the aircraft overheated. Pan Am had to find another plane, which took six hours.[48]

On the 747-100 and 747-200, a spiral staircase was used to go from the bottom to the upper deck

The 747 did quite well when it first began to be used. Some people thought that airports would not be able to handle such a big plane. However, they could.[49] There were some problems, but they were quite small and they were fixed quickly.[50] After Pan Am began to use the plane, other airlines began to use their 747s.[51] Boeing thought that a lot of 747s would be sold because airlines wanted a plane which could fly for a long time, not because it was so big.[52][53]

The recession of 1969-1970 was very bad for Boeing. For over a year after September 1970, it only sold two 747s. None were sold to an American airline for over three years.[45]:302 Some airlines did not have enough passengers to fly the 747. Therefore, they replaced them with the McDonnell Douglas DC-10 and Lockheed L-1011 TriStar.[54] American Airlines eventually only used its 747s to carry cargo. In 1983, AA gave its 747s to Pan Am. Pan Am gave American Airlines some smaller planes.[55] Delta Air Lines also stopped using its 747s after many years.[56] Delta would later merge with Northwest Airlines, which operates 747s.[57]

Later 747s had a longer deck at the top

Flights which landed in smaller cities became quite usual in the 1980s. This was bad for the 747.[58] However, many airlines still used the 747 to fly across the Pacific.[59]

Better types of 747

The first type of 747 was called the 747-100. After this, Boeing made the −100B, which has a higher MTOW (maximum takeoff weight), and the −100SR (Short Range). The -100SR could carry more passengers.[60] A higher MTOW means that the plane can carry more fuel and fly further.[61] In 1971, Boeing made the −200. It had better engines and a higher MTOW. Airliner and cargo versions of the −200 were made.[60] The 747SP (special performance) was also made. It began being used in 1976.[62]

In 1980, Boeing made the 747-300. The first 747-300 was made in 1983. Its upper deck was longer, it flew faster and it could hold more passengers. The −300 was first called the 747SUD for "stretched upper deck". Then it was called the 747-200 SUD,[63] then the 747EUD, and finally it was called the 747-300.[64]

The 747-400 began being used in 1989. Air New Zealand was one of the first airlines to use it.

In 1985, Boeing began to design the 747-400.[65] This type has a glass cockpit. This meant that only two people were needed in the cockpit.[66] It also had new engines and a new cabin. The workers who made the 747-400 were not very experienced and Boeing wanted them to work for longer than they needed to. This meant that there were some problems with the first 747-400s.[1] The −400 began being used by airlines in 1989.[67]

In 1991, 1,087 passengers were taken to Israel on a 747. This was a part of Operation Solomon.[68] The Antonov An-225 cargo transport is the world's biggest plane. The Hughes H-4 Hercules has the biggest wingspan, but it only flew once.[69]

More developments

747-400 economy cabin.

Since the 747-400 was made, many more types of 747 have been suggested. Boeing said that they would make the 747-500X and -600X in 1996.[70] These new planes would have cost more than US\$5 billion to design and make.[70] Airlines did not like it enough, so Boeing decided not to make the planes.[71] In 2000, Boeing said it would make a 747X to rival the Airbus A3XX. However, airlines did not like the 747X enough, so it was cancelled. A year later, Boeing began concentrating on the Sonic Cruiser.[72] The Sonic Cruiser was stopped, so Boeing then focused on the Boeing 787 Dreamliner.[73] Some of the ideas that Boeing had for the 747X were used on the 747-400ER.[74]

In 2004, Boeing said that it might work on the 747 Advanced. Boeing decided to go ahead with this. The 747 Advanced used some things from the 787 to make the 747's design more modern. The 747 was the world's biggest passenger plane until the Airbus A380 was finished in 2007.[75]

On November 14, 2005, Boeing said it had changed the name of the 747 Advanced to the Boeing 747-8.[76] The last 747-400s were made in 2009.[77] On February 8, 2010, the 747-8 Freighter made its first flight.[78] Cargolux got the first 747-8 in 2011.[79][80] Eventually, the 747 will be replaced by "Y3".[81]

Design

Boeing 747-200 design.

The Boeing 747 is a big, wide-body airliner. It has four engines on the wings, and the wings are swept at 37.5 degrees, so the 747 can fly very fast.[21] The sweep also means that the 747 does not need any special hangars.[1][82]

Cargolux 747-400F with the cargo door open.

Since the cockpit is above the main deck, it makes a "hump", and because it is so high, the plane can have a cargo door installed at the front.[21]

The 747-100 can fly for 5,300 nautical miles (6,100 mi, 9,800 km), and the 747-8i can fly for 8,000 nmi (9,200 mi, 14,815 km).[83][84]

The 747 has special flaps, which allow the 747 to fly slowly and land on normal runways.[85] A 747 can carry a fifth engine on the wing, but it cannot be used.[86][87]

Different types of Boeing 747

The 747-100 was the very first type of 747, which was made in 1966. The 747-200, the next version, was made in 1968. The 747-300 was made in 1980 and the 747-400 was made in 1985. The newest version, the 747-8, was announced in 2005. These types also have smaller sub-types. The International Civil Aviation Organization (ICAO) names these planes by combining the model number of the plane with its type number. For example, the 747-100 is "B741" and the 747-400 is "B744".[88]

747-100

Pan Am was the first airline to use the 747.

The first 747-100s had six windows on the upper deck. Later, airlines began to use the upper deck to hold more passengers instead of using it as a lounge. Boeing then made an upper deck with ten window. Some −100s had the new ten-window upper deck installed after the plane was made (retrofitted).[89] The −100 had Pratt & Whitney JT9D-3A engines. Boeing did not make a freighter version of the 747-100, but some airlines have turned some 747-100s into freighters.[90] 167 747-100s were made.

747-100SR

After Japanese airlines requested an aircraft to fly routes between major cities in Japan, Boeing produced the -100SR. This model flies shorter distances, but is able to carry more passengers. The first -100SR started flying with Japan Air Lines (JAL) on October 7, 1973.[91] The -100SR had four General Electric CF6-45A2 or Pratt & Whitney JT9D-7A engines. A total of 7 -100SR were produced.

Later, Boeing designed a type of -100SR with the ability of taking off with greater weight. This was the -100BSR. It was first delivered to All Nippon Airways (ANA) on 21 December 1978. 20 -100BSR were delivered to JAL and ANA.

In 1986, 2 -100BSR with stretched upper deck (SUD) from the -300 series were delivered to JAL. It was the last -100SR/BSR ever built. The last delivery was to JAL, in September 1986.[2] There were a total of 29 -100SR/BSR made.[92]

747SP

The 747SP (SP means special performance) is designed as Pan Am and Iran Air both wanted a wide-body plane that can fly from New York to the Middle East (for Pan Am) and Tehran to New York (for Iran Air). The first 747SP was produced on 19 May 1975. Its first flight was on 4 July. On this flight, it flew at a top speed of Mach 0.92 (1,127 kilometres per hour or 700 miles per hour). It started flying passengers on 25 April 1976, after being delivered on 5 March.[93] Now, it is seldom used.

A total of 45 747SP were made and used by airlines like Qantas, China Airlines, Air China and South African Airways.[94]

SyrianAir 747SP

747-200

After the -100 were made,Boeing started making -200.The -200 has a longer range,but still carries the same number of people.This is because airlines said the -100 could not fly long distance.The -200 is made in passenger type(-200B),freighter type(-200F),Combi type(A plane that carries both cargo and people;-200M) and convertible type(a plane that can be easily changed to carry cargo;-200C).

The first -200B was finished on 10th September,1970 before its first flight on 11th October and finally,it started being used by KLM.Boeing then started making the other types of -200.The -200F first flight was on November 30,1971,7 days after it was finished.It was then delivered to Lufthansa.

The -200C first flew on March 23,1973 before being delivered to World Airways in May the same year.Finally,the -200M had its first flight on November 11, 1974 before being delivered to Air Canada.

There was a total of 393 -200 series ever made,which includes 225 -200B,78 -200M,73 -200F,13 -200C and 4 military.[92]

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