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Freeze Point 1
- Thread starter Falcon03
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When dealing with low-temperature properties of aviation fuels, whatever prediction methods for freezing points may be available in theory, one should rely only on tests such as ASTM D 2386/IP 16 when dealing with aviation fuels. And these should be accompanied by a measurement of viscosities (D 445/IP 71) at low temperatures.
Besides, water icing may be critical. This risk is generally avoided by heating the fuel in the aircraft, or by addition of anti-icing glycol-type chemicals.
Microbiological growth activity may become another risk. Fortunately, it appears that some anti-icing additives aka "fuel system icing inhibitors" (FSII) have biocidal properties.
Besides, water icing may be critical. This risk is generally avoided by heating the fuel in the aircraft, or by addition of anti-icing glycol-type chemicals.
Microbiological growth activity may become another risk. Fortunately, it appears that some anti-icing additives aka "fuel system icing inhibitors" (FSII) have biocidal properties.
The technical literature shows that for an ASTM jet fuel A-1 (DERD 2494, NATO F-35)) freezing points are affected by the final boiling point of the fuel in quite a linear manner.
I've seen a graph for A-1 kerosines from ME crudes correlating them. With my old eyes I could discern that a 270 deg C FBP would correspond to a FP -48 deg C. A -50 deg C FP would correspond to a FBP of 265 deg C. I pressume that every crude would should show similar types of correlation.
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