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The Boeing 747 is an American wide-body commercial jet airliner and cargo aircraft, often referred to by its original nickname, Jumbo Jet. Its distinctive hump upper deck along the forward part of the aircraft has made it one of the most recognizable aircraft, and it was the first wide-body airplane produced. Manufactured by Boeing's Commercial Airplane unit in the United States, the 747 was originally envisioned to have 150 percent greater capacity than the Boeing 707, a common large commercial aircraft of the 1960s. First flown commercially in 1970, the 747 held the passenger capacity record for 37 years.The four-engine 747 uses a double-deck configuration for part of its length and is available in passenger, freighter and other versions. Boeing designed the 747's hump-like upper deck to serve as a first–class lounge or extra seating, and to allow the aircraft to be easily converted to a cargo carrier by removing seats and installing a front cargo door. Boeing expected supersonic airliners—the development of which was announced in the early 1960s—to render the 747 and other subsonic airliners obsolete, while the demand for subsonic cargo aircraft would remain robust well into the future. Though the 747 was expected to become obsolete after 400 were sold, it exceeded critics' expectations with production surpassing 1,000 in 1993. By July 2018, 1,546 aircraft had been built, with 22 of the 747-8 variants remaining on order. As of January 2017, the 747 has been involved in 60 hull losses, resulting in 3,722 fatalities.The 747-400, the most common variant in service, has a high-subsonic cruise speed of Mach 0.85–0.855 with an intercontinental range of 7,260 nautical miles . The 747-400 can accommodate 416 passengers in a typical three-class layout, 524 passengers in a typical two-class layout, or 660 passengers in a high–density one-class configuration. The newest version of the aircraft, the 747-8, is in production and received certification in 2011. Deliveries of the 747-8F freighter version began in October 2011; deliveries of the 747-8I passenger version began in May 2012.
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