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Specific Fuel Consumption in Range and Endurance Formulas

Specific Fuel Consumption is a characteristic of the engine and defined as the weight of fuel consumed per unit power per unit time. And is denoted by c. Specific Fuel Consumption is usually measured using the Kilogram per Hour per Watt for Specific Fuel Consumption. Note that the value of Specific Fuel Consumption is always positive.

Formulas to find Specific Fuel Consumption in Range and Endurance

fxSpecific Fuel Consumption given Range for Jet Aircraft​Go
fxSpecific Fuel Consumption given Preliminary Endurance for Jet Aircraft​Go
fxSpecific Fuel Consumption for given Range of Propeller-Driven Airplane​Go
fxSpecific Fuel Consumption for given Range and Lift-to-Drag Ratio of Propeller-Driven Airplane​Go
fxSpecific Fuel Consumption for given Endurance of Propeller-Driven Airplane​Go
fxSpecific Fuel Consumption given Range for Prop-Driven Aircraft​Go
fxSpecific Fuel Consumption given Preliminary Endurance for Prop-Driven Aircraft​Go

Range and Endurance formulas that make use of Specific Fuel Consumption

fxCruise Weight Fraction for Jet Aircraft​Go
fxMaximum Lift to Drag Ratio given Range for Jet Aircraft​Go
fxMaximum Lift to Drag Ratio given Preliminary Endurance for Jet Aircraft​Go
fxLoiter Weight Fraction for Jet Aircraft​Go
fxRange of Propeller-Driven Airplane​Go
fxPropeller Efficiency for given Range of Propeller-Driven Airplane​Go
fxRange of Propeller-Driven Airplane for given lift-to-drag ratio​Go
fxPropeller Efficiency for given Range and Lift-to-Drag Ratio of Propeller-Driven Airplane​Go
fxEndurance of Propeller-Driven Airplane​Go
fxPropeller Efficiency for given Endurance of Propeller-Driven Airplane​Go
fxMaximum Lift to Drag Ratio given Range for Prop-Driven Aircraft​Go
fxLift to Drag for Maximum Endurance given Preliminary Endurance for Prop-Driven Aircraft​Go
fxPropeller Efficiency given Range for Prop-Driven Aircraft​Go
fxPropeller Efficiency given Preliminary Endurance for Prop-Driven Aircraft​Go
fxCruise Weight Fraction for Prop-Driven Aircraft​Go
fxLift-to-Drag ratio for given Range of Propeller-Driven Airplane​Go

List of variables in Range and Endurance formulas

fx Velocity at Maximum Lift to Drag Ratio ​Go
fx Maximum Lift-to-Drag Ratio ​Go
fx Weight at Start of Cruise Phase ​Go
fx Weight at End of Cruise Phase ​Go
fx Range of Jet Aircraft ​Go
fx Weight at Start of Loiter Phase ​Go
fx Weight at End of Loiter Phase ​Go
fx Endurance of Aircraft ​Go
fx Propeller Efficiency ​Go
fx Range of Propeller Aircraft ​Go
fx Lift Coefficient ​Go
fx Drag Coefficient ​Go
fx Gross Weight ​Go
fx Weight without Fuel ​Go
fx Lift-to-Drag Ratio ​Go
fx Freestream Density ​Go
fx Reference Area ​Go
fx Lift to Drag Ratio at Maximum Endurance Prop ​Go
fx Velocity for Maximum Endurance ​Go

FAQ

What is the Specific Fuel Consumption?
Specific Fuel Consumption is a characteristic of the engine and defined as the weight of fuel consumed per unit power per unit time. Specific Fuel Consumption is usually measured using the Kilogram per Hour per Watt for Specific Fuel Consumption. Note that the value of Specific Fuel Consumption is always positive.
Can the Specific Fuel Consumption be negative?
No, the Specific Fuel Consumption, measured in Specific Fuel Consumption cannot be negative.
What unit is used to measure Specific Fuel Consumption?
Specific Fuel Consumption is usually measured using the Kilogram per Hour per Watt[kg/h/W] for Specific Fuel Consumption. Kilogram per Second per Watt[kg/h/W], Kilogram per Second per Brake horsepower[kg/h/W], Kilogram per Hour per Kilowatt[kg/h/W] are the few other units in which Specific Fuel Consumption can be measured.
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