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A jet aircraft (or simply jet) is an aircraft (nearly always a fixed-wing aircraft) propelled by one or more jet engines. Whereas the engines in propeller-powered aircraft generally achieve their maximum efficiency at much lower speeds and altitudes, jet engines achieve maximum efficiency at speeds close to or even well above the speed of sound .
Jet aircraft use airbreathing jet engines, which take in air, burn fuel with it in a combustion chamber, and accelerate the exhaust rearwards to provide thrust. Different jet engine configurations include the turbojet and turbofan, sometimes with the addition of an afterburner. Those with no rotating turbomachinery include the pulsejet and ramjet.
A jet airliner or jetliner is an airliner powered by jet engines (passenger jet aircraft).Airliners usually have two or four jet engines; three-engined designs were popular in the 1970s but are less common today.
Jet aircraft, an aircraft propelled by jet engines Jet airliner; Jet engine; Jet fuel; Jet Airways, an Indian airline; Super Air Jet, an Indonesian airline; Wind Jet (ICAO: JET), an Italian airline; Journey to Enceladus and Titan (JET), a proposed astrobiology orbiter to Saturn; Jet pack, a backpack personal flying device containing a jet motor
Whereas jet aircraft use the atmosphere both as a source of oxidant and of mass to accelerate reactively behind the aircraft, rocket aircraft carry the oxidizer on board and accelerate the burned fuel and oxidizer backwards as the sole source of mass for reaction. Liquid fuel and oxidizer may be pumped into a combustion chamber or a solid fuel ...
Two unbuilt Cessna aircraft of the 1950s and 1960s would have met the definition of a VLJ. The first was the 407, a four-seat civil version of the T-37 jet trainer proposed in 1959; however, the 407 never progressed past the mockup stage due to insufficient customer interest.
The following is the list of purpose-built passenger jet airliners.It excludes turboprop and reciprocating engine powered airliners. It also excludes business jets and aircraft designed primarily for the transportation of air cargo.
Jet fighter generations classify the major technology leaps in the historical development of the jet fighter. Different authorities have identified different technology jumps as the key ones, dividing fighter development into different numbers of generations. Five generations are now widely recognised, with the development of a sixth under way. [1]