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Gfa 173an


Applicable to all jet powered sailplanes using diesel fuel. Variation of Australian diesel fuel with location and season. Defn: Cloud Point: The temperature at which wax is first seen to crystallize in the fuel Cold Filter Plugging Point (CFPP): The CFPP is the lowest temperature at which fuel will still flow through a standard filter. Typically the CFPP is 3 degrees Celsius below the diesel cloud point. Pour Point: The temperature at which the fuel freezes. Typically the pour point is 3 to 6 degrees Celsius below the diesel cloud point. Diesel is a fuel intended for automotive use. The fuel contents are adjusted to suit the climate of the area at the time of purchase. Whilst approved for use in some jet engines, the variation with location and season may cause starting or running issues. All diesel fuels contain wax. Normally the wax is a liquid in solution in the fuel. It is an important component because it gives the fuel a good cetane value for automotive engines. However, when a fuel gets cold the wax will start to crystallize at the fuel cloud point temperature. These wax crystals can block engine fuel filters or small orifices.