What is Importance of Fuel Fraction?
In aerospace engineering, an aircraft's fuel fraction, fuel weight fraction, or a spacecraft's propellant fraction, is the weight of the fuel or propellant divided by the gross take-off weight of the craft (including propellant). The fractional result of this mathematical division. For aircraft with external drop tanks, the term internal fuel fraction is used to exclude the weight of external tanks and fuel. Fuel fraction is a key parameter in determining an aircraft's range, the distance it can fly without refueling. Breguet’s aircraft range equation describes the relationship of range with airspeed, lift-to-drag ratio, specific fuel consumption, and the part of the total fuel fraction available for cruise, also known as the cruise fuel fraction, or cruise fuel weight fraction.
How to Calculate Fuel Weight given Fuel Fraction?
Fuel Weight given Fuel Fraction calculator uses Fuel Weight to be Carried = Fuel Fraction*Desired Takeoff Weight to calculate the Fuel Weight to be Carried, The Fuel Weight given Fuel Fraction formula is used to find weight of fuel that the airplane carries during the whole flight. Fuel Weight to be Carried is denoted by FW symbol.
How to calculate Fuel Weight given Fuel Fraction using this online calculator? To use this online calculator for Fuel Weight given Fuel Fraction, enter Fuel Fraction (Ff) & Desired Takeoff Weight (DTW) and hit the calculate button. Here is how the Fuel Weight given Fuel Fraction calculation can be explained with given input values -> 0.0625 = 0.25*250000.