HCF of two numbers

Fuel Fraction Calculator

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Preliminary Design Conceptual Design

✖Fuel Weight to be Carried is defined as the total mass of the fuel to be carried (usually includes reserve fuel).ⓘ Fuel Weight to be Carried [FW]			+10% -10%
✖Desired Takeoff Weight (or mass) is the weight of the aircraft.ⓘ Desired Takeoff Weight [DTW]			+10% -10%

✖Fuel Fraction is the ratio between weight of fuel caried by a plane to the aircraft total take off weight.ⓘ Fuel Fraction [F_f]

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Fuel Fraction Solution

STEP 0: Pre-Calculation Summary

Formula Used

Fuel Fraction = Fuel Weight to be Carried/Desired Takeoff Weight
F_f = FW/DTW
This formula uses 3 Variables

Variables Used

Fuel Fraction - Fuel Fraction is the ratio between weight of fuel caried by a plane to the aircraft total take off weight.
Fuel Weight to be Carried - (Measured in Kilogram) - Fuel Weight to be Carried is defined as the total mass of the fuel to be carried (usually includes reserve fuel).
Desired Takeoff Weight - (Measured in Kilogram) - Desired Takeoff Weight (or mass) is the weight of the aircraft.

STEP 1: Convert Input(s) to Base Unit

Fuel Weight to be Carried: 100000 Kilogram --> 100000 Kilogram No Conversion Required
Desired Takeoff Weight: 250000 Kilogram --> 250000 Kilogram No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

F_f = FW/DTW --> 100000/250000

Evaluating ... ...

F_f = 0.4

STEP 3: Convert Result to Output's Unit

0.4 --> No Conversion Required

FINAL ANSWER

0.4 <-- Fuel Fraction

(Calculation completed in 00.004 seconds)

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Created by Vedant Chitte

All India Shri Shivaji Memorials Society's ,College of Engineering (AISSMS COE PUNE), Pune

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< Preliminary Design Calculators

Optimum Range for Jet Aircraft in Cruising Phase

LaTeX Go Range of Aircraft = (Velocity at Maximum Lift to Drag Ratio*Maximum Lift-to-Drag Ratio of Aircraft)/Power Specific Fuel Consumption*ln(Weight of Aircraft at Beginning of Cruise Phase/Weight of Aircraft at End of Cruise Phase)

Preliminary Take Off Weight Built-up for Manned Aircraft

LaTeX Go Desired Takeoff Weight = Payload Carried+Operating Empty Weight+Fuel Weight to be Carried+Crew Weight

Preliminary Take off Weight Built-Up for Manned Aircraft given Fuel and Empty Weight Fraction

LaTeX Go Desired Takeoff Weight = (Payload Carried+Crew Weight)/(1-Fuel Fraction-Empty Weight Fraction)

Fuel Fraction

LaTeX Go Fuel Fraction = Fuel Weight to be Carried/Desired Takeoff Weight

Fuel Fraction Formula

LaTeX Go

Fuel Fraction = Fuel Weight to be Carried/Desired Takeoff Weight
F_f = FW/DTW

What is Fuel Weight?

The total weight of fuel carried by an aircraft during whole flight is called as fuel weight. The fuel weight varies with the flight, as the fuel is burnt in the engines the weight of fuel reduces. For Fuel Fraction the maximum amount of fuel is considered.

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 Fraction?

Fuel Fraction calculator uses Fuel Fraction = Fuel Weight to be Carried/Desired Takeoff Weight to calculate the Fuel Fraction, The Fuel Fraction of an aircraft is a parameter used in aircraft design and performance calculations to represent the proportion of the total weight of the aircraft at takeoff that is attributed to fuel. Fuel Fraction is denoted by F_f symbol.

How to calculate Fuel Fraction using this online calculator? To use this online calculator for Fuel Fraction, enter Fuel Weight to be Carried (FW) & Desired Takeoff Weight (DTW) and hit the calculate button. Here is how the Fuel Fraction calculation can be explained with given input values -> 0.4 = 100000/250000.

FAQ

What is Fuel Fraction?

The Fuel Fraction of an aircraft is a parameter used in aircraft design and performance calculations to represent the proportion of the total weight of the aircraft at takeoff that is attributed to fuel and is represented as F_f = FW/DTW or Fuel Fraction = Fuel Weight to be Carried/Desired Takeoff Weight. Fuel Weight to be Carried is defined as the total mass of the fuel to be carried (usually includes reserve fuel) & Desired Takeoff Weight (or mass) is the weight of the aircraft.

How to calculate Fuel Fraction?

The Fuel Fraction of an aircraft is a parameter used in aircraft design and performance calculations to represent the proportion of the total weight of the aircraft at takeoff that is attributed to fuel is calculated using Fuel Fraction = Fuel Weight to be Carried/Desired Takeoff Weight. To calculate Fuel Fraction, you need Fuel Weight to be Carried (FW) & Desired Takeoff Weight (DTW). With our tool, you need to enter the respective value for Fuel Weight to be Carried & Desired Takeoff Weight and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Fuel Fraction?

In this formula, Fuel Fraction uses Fuel Weight to be Carried & Desired Takeoff Weight. We can use 1 other way(s) to calculate the same, which is/are as follows -

Fuel Fraction = 1-Empty Weight Fraction-(Payload Carried+Crew Weight)/Desired Takeoff Weight

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