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. The sweep also means that the 747 does not need any special hangars.
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.
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).
The 747 has special flaps, which allow the 747 to fly slowly and land on normal runways. A 747 can carry a fifth engine on the wing, but it cannot be used.
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".
The first 747-100s had six windows on the upper deck. Later, airlines began to use the upper deck to hold more people instead of using it as a lounge. Boeing then made an upper deck with ten windows. Some −100s had the new ten-window upper deck installed after the plane was made (retrofitted). 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. 167 747-100s were made.
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. 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 December 21, 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. There were a total of 29 -100SR/BSR made.
The 747SP (SP means special performance) is designed as Pan Am and Iran Air both wanted a wide-body plane that can fly long distances; from New York to the Middle East (for Pan Am) and Tehran to New York (for Iran Air). The first 747SP was produced on May 19, 1975. Its first flight was on July 4. On this flight, it flew at a top speed of Mach 0.92 (). It started flying people on April 25, 1976, after being delivered on March 5. Now, it is not often used.
A total of 45 747SP were made and used by airlines like Qantas, China Airlines, Air China, and South African Airways.
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 distances. 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 September 10, 1970 before its first flight on October 11 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.
The 747-300 is a stretched upper deck version of the 747–200. It was designed to fit more passengers on the upper deck. The 747-300 also has updated General Electric CF6-80C2 engines. Otherwise, there are not many differences between the 747-200 and 747–300. The 747-300 has a length of 231 feet 10 inches and a wingspan of 195 feet 8 inches.
The 747-400 was the next-generation Boeing 747 introduced in 1989. It is the best-selling variant of the Boeing 747. It includes improvements over the 747-300 including new engines, and new winglets, which improve fuel efficiency. Its length is the same as the 747-300 but the wingspan has been increased to 211 feet 5 inches. The 747-400 retains the same longer upper deck as the 747-300 (excluding frieghter versions), and came in six variants: the 747–400, 747-400F, 747-400M, 747-400D, 747-400ER, and the 747-400ERF.
The most recent variant of the Boeing 747 was announced in 2005 and released on 2011. It includes a longer stretched upper deck, a new Boeing Sky Interior, an updated flight deck, new wings based on ones from the Boeing 787 Dreamliner, and new GEnx turbofan engines. It totals 250 feet in length, making it the longest commercial passenger jet ever built. The 747-8 comes in two variants: 747-8I and 747-8F (freighter).
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Googolplex
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Like the number "googol", "googolplex" was thought of by Milton Sirotta, the nephew of mathematician Edward Kasner.
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A googolplexplex or googolplexian is a 1 followed by a Googolplex amount of zeros which is 10 (10 ).
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