When gasoline rises from 60 to 75 degrees F, for instance, it increases in volume by 1 percent while the energy content remains the same. Gasoline does expand and contract a little depending on its temperature. That’s because gasoline, like all liquids, expands when heated. This means, if you know the density in g/ml, that value should be the specific gravity of gasoline. The maximum density of of water is 1 g/ml at around 4☌. Specific gravity is an object’s density compared to the maximum density of water. You are (almost always) metering the fuel you dispense to the aircraft in volume (gallons or liters).ĭensity of gasoline can also be defined using the specific gravity of gasoline. A bucket of fuel will weigh the same at different temperatures, but the volume of the fuel in the bucket changes. Fuel expands or contracts as fuel temperature increases or decreases. For Jet A, the lower flammability limit found using a 100 Joule spark is between 35 and 40 degrees Celsius, or about 94 to 105 degrees Fahrenheit.ĭoes jet fuel weight change with temperature?ģ. Since the vapor pressure and fuel concentration increases with increasing temperature, ignition energy decreases with increasing fuel temperature. 5 What are the correlations for fuel oil density and temperature?.3 Does temperature affect fuel economy?.1 How does temperature affect jet fuel?.
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