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It was a pure kerosene fuel with high flash point (relative to aviation gasoline) and a freezing point of −60 °C (−76 °F). The low freezing point requirement limited availability of the fuel and it was soon superseded by other "wide cut" jet fuels which were kerosene-naphtha or kerosene-gasoline blends. It was also known as avtur. JP-2
It had a lower flash point than JP-1, but was preferred because of its greater availability. It was the primary U.S. Air Force jet fuel between 1951 and 1995. MC-77 is the Swedish military equivalent of JP-4. [3]
Melting/freezing point of palm oil [30] 309.5 K: 36.4 °C: 97.5 °F: ... Kindling point of jet fuel (Jet B) [57] 538 K: 265 °C: 510 °F: Smoke point of refined ...
It has a low freezing point of less than −110 °C (−166 °F) and the flash point is 130 °F (54 °C). The high energy density of 39.6 MJ/L makes it ideal for military aerospace applications - its primary use. The ignition and burn chemistry has been extensively studied. [8] [9] [10] The exo isomer also has a low freezing point.
The mixture is restricted by product requirements, for example, freezing point and smoke point. Jet fuels are sometimes classified as kerosene or naphtha-type. Kerosene-type fuels include Jet A, Jet A-1, JP-5 and JP-8. Naphtha-type jet fuels, sometimes referred to as "wide-cut" jet fuel, include Jet B and JP-4.
JPTS has a flash point of 43 °C (110 °F), a freezing point of -53 °C (-64 °F) [3] and flammability limits of 1 and 6 %. It has an appearance of a water-white clear liquid with specific gravity of 0.816. It is insoluble in water. It is composed of a complex mixture of petroleum hydrocarbons. [4]
The gel point of petroleum products is the temperature at which the liquids gel so they no longer flow by gravity or can be pumped through fuel lines. This phenomenon happens when the petroleum product reaches a low enough temperature to precipitate interlinked paraffin wax crystals throughout the fluid .
LOUT is the lowest temperature at which a de/anti-icing fluid will adequately flow off aircraft critical surfaces and maintain the required anti-icing freezing point buffer for type II, III and IV fluid which is 7 °C (45 °F), and 10 °C (50 °F) for type I fluid below outside air temperature (OAT).