Jet airliner in the context of Jet aircraft

An airplane (American English), or aeroplane (Commonwealth English), informally plane, is a fixed-wing aircraft that is propelled forward by thrust from a jet engine, propeller, or rocket engine. Airplanes come in a variety of sizes, shapes, and wing configurations. The broad spectrum of uses for airplanes includes recreation, transportation of goods and people, military, and research. Worldwide, commercial aviation transports more than four billion passengers annually on airliners and transports more than 200 billion tonne-kilometers of cargo annually, which is less than 1% of the world's cargo movement. Most airplanes are flown by a pilot on board the aircraft, but some are designed to be remotely or computer-controlled, such as drones.

The Wright brothers invented and flew the first airplane in 1903, recognized as "the first sustained and controlled heavier-than-air powered flight". They built on the works of George Cayley , dating from 1799, when he set forth the concept of the modern airplane (and later built and flew models and successful passenger-carrying gliders) and the work of German pioneer of human aviation Otto Lilienthal, who, between 1867 and 1896, also studied heavier-than-air flight. Lilienthal's flight attempts in 1891 are seen as the beginning of human flight.Following its limited use in World War I, aircraft technology continued to develop. Airplanes had a presence in all the major battles of World War II. The first jet aircraft was the German Heinkel He 178 in 1939. The first jet airliner, the de Havilland Comet, was introduced in 1952. The Boeing 707, the first widely successful commercial jet, was in commercial service for more than 60 years, from 1958 to 2019.

A trijet is a jet aircraft powered by three jet engines. In general, passenger airline trijets are considered to be second-generation jet airliners, due to their innovative engine locations, in addition to the advancement of turbofan technology. Trijets are more efficient than quadjets, but not as efficient as twinjets, which replaced trijets as larger and more reliable turbofan engines became available.

The Entebbe raid, also known as the Operation Entebbe and officially codenamed Operation Thunderbolt (also retroactively codenamed Operation Yonatan), was a 1976 Israeli counter-terrorist mission in Uganda. It was launched in response to the hijacking of an international civilian passenger flight (an Airbus A300) operated by Air France between the cities of Tel Aviv and Paris. During a stopover in Athens, the aircraft was hijacked by two Palestinian PFLP–EO and two German RZ members, who diverted the flight to Libya and then to Uganda, where they landed at Entebbe International Airport to be joined by other terrorists. Once in Uganda, the group enjoyed support from Ugandan dictator Idi Amin.

A week earlier, on 27 June, an Air France Airbus A300 jet airliner with 248 passengers had been hijacked by two members of the Popular Front for the Liberation of Palestine – External Operations (PFLP-EO) under orders of Wadie Haddad (who had earlier broken away from the PFLP of George Habash), and two members of the German Revolutionary Cells. The hijackers took hostages with the stated objective of compelling the release of 40 Palestinian and affiliated militants imprisoned in Israel as well as the release of 13 prisoners in four other countries. Over 100 Ugandan soldiers were deployed to support the hijackers after the flight landed, and Amin, who had been informed of the hijacking from the beginning, had personally welcomed the terrorists at Entebbe. After moving all of the hostages to a defunct airport, the hijackers separated all Israelis and several non-Israeli Jews from the larger group of passengers, subsequently moving them into a separate room. Over the next two days, 148 non-Israeli hostages were released and flown out to Paris. The 94 remaining passengers, most of whom were Israelis, and the 12-member Air France crew continued to be held as hostages.

Lufthansa Flight 181, a Boeing 737-230C jet airliner (reg. D-ABCE) named Landshut, was hijacked on 13 October 1977 by four militants of the Popular Front for the Liberation of Palestine while en route from Palma de Mallorca, Spain, to Frankfurt am Main, West Germany. The hijacking aimed to secure the release of eleven notorious Red Army Faction leaders held in West German prisons and two Palestinians held in Turkey. This event was part of the so-called German Autumn, intended to increase pressure on the West German government. The hijackers diverted the flight to several locations before ending in Mogadishu, Somalia, where the crisis concluded in the early morning hours of 18 October 1977 under the cover of darkness. The West German counter-terrorism unit GSG 9, with ground support from the Somali Armed Forces, stormed the aircraft, rescuing all 87 passengers and four crew members. The captain of the flight was killed by the hijackers earlier in the ordeal.

A four-engined jet, sometimes called a quadjet, is a jet aircraft powered by four engines. The presence of four engines offers increased power and redundancy, allowing such aircraft to be used as airliners, freighters, and military aircraft. Many of the first purpose-built jet airliners had four engines, among which stands the de Havilland Comet, the world's first commercial jetliner. In the decades following their introduction, their use has gradually declined due to a variety of factors, including the approval of twin-engine jets to fly farther from diversion airports as reliability increased, and an increased emphasis on fuel efficiency.

The Jet Age is a period in the history of aviation defined by the advent of aircraft powered by jet turbine engines and the social and cultural changes fostered by commercial jet travel.

Jet airliners were able to fly higher, faster, and farther than older piston‑powered propliners, making transcontinental and intercontinental travel considerably faster and easier. Aircraft leaving North America and crossing the Atlantic Ocean (and later, the Pacific Ocean) could now fly to their destinations non-stop, making much of the world accessible within a single day's travel for the first time. Large jetliners could carry more passengers than piston-powered airliners, which caused air fares to decline and opened international travel to a broader range of socioeconomic groups.

The de Havilland DH.106 Comet is a four-engine narrow body aircraft developed and manufactured by de Havilland in the United Kingdom. The world's first commercial jet airliner, the Comet 1 prototype first flew in 1949. It features an aerodynamically clean design with four de Havilland Ghost turbojet engines located in the wing roots, a pressurised cabin, and large windows. For the era, it offered a relatively quiet, comfortable passenger cabin and was commercially promising at its debut in 1952.

Within a year of the airliner's entry into service, three Comets were lost in highly publicised accidents after suffering catastrophic mishaps mid-flight. Two of these were found to be caused by structural failure resulting from metal fatigue in the airframe, a phenomenon not fully understood at the time; the other was due to overstressing of the airframe during flight through severe weather. The Comet was withdrawn from service and extensively tested. Design and construction flaws, including dangerous stress concentrations around square cut-outs for the ADF (automatic direction finder) antennas were ultimately identified. As a result, the Comet was extensively redesigned, with structural reinforcements and other changes. Rival manufacturers heeded the lessons learned from the Comet when developing their own aircraft.

The Airbus A319 is a member of the Airbus A320 family of short- to medium-range, narrow-body, commercial passenger twin-engine jet airliners manufactured by Airbus. The A319 carries 124 to 156 passengers and has a maximum range of 3,700 nmi (6,900 km; 4,300 mi). Final assembly of the aircraft takes place in Hamburg, Germany and Tianjin, China.

The A319 is a shortened-fuselage variant of the Airbus A320 and entered service in April 1996 with Swissair, around two years after the stretched Airbus A321 and eight years after the original A320. The aircraft shares a common type rating with all other Airbus A320 family variants, allowing existing A320 family pilots to fly the aircraft without the need for further training.

The Boeing 777, commonly referred to as the Triple Seven, is an American long-range wide-body airliner developed and manufactured by Boeing Commercial Airplanes. The 777 is the world's largest twinjet and the most-built wide-body airliner.The jetliner was designed to bridge the gap between Boeing's other wide body airplanes, the twin-engined 767 and quad-engined 747, and to replace aging DC-10 and L-1011 trijets. Developed in consultation with eight major airlines, the 777 program was launched in October 1990, with an order from United Airlines. The prototype aircraft rolled out in April 1994, and first flew that June. The 777 entered service with the launch operator United Airlines in June 1995. Longer-range variants were launched in 2000, and first delivered in 2004. Over 2,300 Boeing 777 aircraft have been ordered, with over 70 operators worldwide.

The Triple Seven can accommodate a ten–abreast seating layout and has a typical 3-class capacity of 301 to 368 passengers, with a range of 5,240 to 8,555 nautical miles [nmi] (9,700 to 15,840 km; 6,030 to 9,840 mi). The jetliner is recognizable for its large-diameter turbofan engines, raked wingtips, six wheels on each main landing gear, fully circular fuselage cross-section, and a blade-shaped tail cone. The 777 became the first Boeing airliner to use fly-by-wire controls and to apply a carbon composite structure in the tailplanes.

In navigation, the heading of a vessel or aircraft is the compass direction in which the craft's bow or nose is pointed. Note that the heading may not necessarily be the direction that the vehicle actually travels, which is known as its course. Any difference between the heading and course is due to the motion of the underlying medium, the air or water, or other effects like skidding or slipping. The difference is known as the drift, and can be determined by the wind triangle. At least seven ways to measure the heading of a vehicle have been described.Heading is typically based on cardinal directions, so 0° (or 360°) indicates a direction toward true north, 90° true east, 180° true south, and 270° true west.

The Airbus A321 is a member of the Airbus A320 family of short to medium range, narrow-body, commercial passenger twin engine jet airliners; it carries 185 to 239 passengers. It has a stretched fuselage which was the first derivative of the baseline A320 and entered service in 1994, about six years after the original A320. The aircraft shares a common type rating with all other Airbus A320-family variants, allowing A320-family pilots to fly the aircraft without the need for further training.

In December 2010, Airbus announced a new generation of the A320 family, the A320neo (new engine option). The similarly lengthened fuselage A321neo variant offers new, more efficient engines, combined with airframe improvements and the addition of winglets (called Sharklets by Airbus). The aircraft delivers fuel savings of up to 15%. The A321neo carries up to 244 passengers, with a maximum range of 4,000 nmi (7,400 km; 4,600 mi) for the long-range version when carrying no more than 206 passengers.

The Boeing KC-46 Pegasus is an American military aerial refueling and strategic military transport aircraft developed by Boeing from its 767 jet airliner. In February 2011, the tanker was selected by the United States Air Force (USAF) as the winner in the KC-X tanker competition to replace older Boeing KC-135 Stratotankers. The first aircraft was delivered to the USAF in January 2019.

The USAF intends to procure 179 tankers by 2027. The Air Force indicated that the number of KC-46A aircraft to be procured had increased to 188 which is the absolute maximum number available under the original deal. The Air Force has also elected to pursue a "Tanker Production Extension Program" which will lead to a new contract with Boeing for up to 75 new KC-46A. The total airfare program would grow to 288 KC-46A if all options are exercised.

The Vickers VC10 is a retired mid-sized, narrow-body long-range British jet airliner designed and built by Vickers-Armstrongs (Aircraft) Ltd and first flown at Brooklands, Surrey, in 1962. The VC10 is often compared to the larger Soviet Ilyushin Il-62, the two types being the only airliners to use a rear-engined quad layout, while the smaller Lockheed JetStar business jet also has this engine arrangement.

The VC10 was designed to operate on long-distance routes from the shorter runways of the era and commanded excellent hot and high performance for operations from African airports. The performance of the VC10 was such that it achieved the fastest crossing of the Atlantic by a subsonic jet airliner of 5 hours and 1 minute, a record that was held for 41 years, until February 2020 when a British Airways Boeing 747 broke the record at 4 hours 56 minutes due to Storm Ciara. Only the supersonic Concorde was faster at 2 hours, 52 minutes, 59 seconds. Although only a relatively small number of VC10s were built, they provided long service with BOAC and other airlines from the 1960s to 1981.

In aerospace engineering, payload fraction is a common term used to characterize the efficiency of a particular design. The payload fraction is the quotient of the payload mass and the total vehicle mass at the start of its journey. It is a function of specific impulse, propellant mass fraction and the structural coefficient. In aircraft, loading less than full fuel for shorter trips is standard practice to reduce weight and fuel consumption. For this reason, the useful load fraction calculates a similar number, but it is based on the combined weight of the payload and fuel together in relation to the total weight.

Propeller-driven airliners had useful load fractions on the order of 25–35%. Modern jet airliners have considerably higher useful load fractions, on the order of 45–55%.

The Sud Aviation SE 210 Caravelle is a rear-engine narrow-body jet airliner produced by French Sud Aviation.It was developed by SNCASE in the early 1950s, and made its maiden flight on May 27, 1955. It included some de Havilland designs and components developed for the de Havilland Comet, the first jet airliner. SNCASE merged into the larger Sud Aviation conglomerate before the aircraft entered revenue service on April 26, 1959, with Scandinavian Airlines System (SAS); 282 were built until production ended in 1972. It was ordered by airlines on every continent and operated until its retirement in 2005.

The short-range, five-abreast airliner is powered by two aft-mounted Rolls-Royce Avon turbojet engines, allowing a clean low wing.The configuration was later retained in many narrow-body aircraft and regional jets.The initial I, III and VI variants could seat 90 to 99 passengers over 1,650 to 2,500 kilometres (1,030 to 1,550 mi; 890 to 1,350 nmi).The later, slightly longer 10/11 variants could seat 99 to 118 passengers over 2,800 to 3,300 kilometres (1,700 to 2,100 mi; 1,500 to 1,800 nmi) and were powered by Pratt & Whitney JT8D low-bypass turbofans.The stretched Caravelle 12 could seat 131 over 3,200 kilometres (2,000 mi; 1,700 nmi).