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Jet fuel is a mixture of a variety of hydrocarbons. Because the exact composition of jet fuel varies widely based on petroleum source, it is impossible to define jet fuel as a ratio of specific hydrocarbons. Jet fuel is therefore defined as a performance specification rather than a chemical compound. [1]
Jet fuel is a gas turbine fuel used in propeller and jet fixed-wing aircraft and helicopters. It has a low viscosity at low temperature, has limited ranges of density and calorific value , burns cleanly, and remains chemically stable when heated to high temperature.
An aviation biofuel (also known as bio-jet fuel, [89] sustainable aviation fuel (SAF) or bio-aviation fuel (BAF) [90]) is a biofuel used to power aircraft. The International Air Transport Association (IATA) considers it a key element in reducing the environmental impact of aviation. [91]
Flight altitude affects engine efficiency. Jet-engine efficiency increases at altitude up to the tropopause, the temperature minimum of the atmosphere; at lower temperatures, the Carnot efficiency is higher. [111] Jet engine efficiency is also increased at high speeds, but above about Mach 0.85 the airframe aerodynamic losses increase faster.
An aviation biofuel (also known as bio-jet fuel, [65] sustainable aviation fuel (SAF) or bio-aviation fuel (BAF) [66]) is a biofuel used to power aircraft. The International Air Transport Association (IATA) considers it a key element in reducing the environmental impact of aviation. [67]
13:12, Alex Ross Rachel Reeves has confirmed support for the expansion of Heathrow airport, but a number of issues must be resolved if a third runway is to be built.
On passenger planes, fuel tanks are often integrated into the wings, and when there are also tanks inside the body of the aircraft, the wing tanks are used preferentially. [7] [6] The placement reduces the stress on the wings during takeoff and flight, by putting the heavy fuel directly inside the source of lift. [7]
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