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Takeoff Weight given Empty Weight Fraction Calculator

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Preliminary Design Conceptual Design

✖Operating Empty Weight of the aircraft is the aircraft's weight without including passengers, baggage, or fuel.ⓘ Operating Empty Weight [OEW]			+10% -10%
✖Empty Weight Fraction is the ratio of the operating empty weight to the desired takeoff weight.ⓘ Empty Weight Fraction [E_f]			+10% -10%

✖Desired Takeoff Weight (or mass) is the weight of the aircraft.ⓘ Takeoff Weight given Empty Weight Fraction [DTW]

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Formula

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Takeoff Weight given Empty Weight Fraction

Formula

DTW = \frac{OEW}{E f}

Example

250000 kg = \frac{125000 kg}{0.5}

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Takeoff Weight given Empty Weight Fraction Solution

STEP 0: Pre-Calculation Summary

Formula Used

Desired Takeoff Weight = Operating Empty Weight/Empty Weight Fraction
DTW = OEW/E_f
This formula uses 3 Variables

Variables Used

Desired Takeoff Weight - (Measured in Kilogram) - Desired Takeoff Weight (or mass) is the weight of the aircraft.
Operating Empty Weight - (Measured in Kilogram) - Operating Empty Weight of the aircraft is the aircraft's weight without including passengers, baggage, or fuel.
Empty Weight Fraction - Empty Weight Fraction is the ratio of the operating empty weight to the desired takeoff weight.

STEP 1: Convert Input(s) to Base Unit

Operating Empty Weight: 125000 Kilogram --> 125000 Kilogram No Conversion Required
Empty Weight Fraction: 0.5 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

DTW = OEW/E_f --> 125000/0.5

Evaluating ... ...

DTW = 250000

STEP 3: Convert Result to Output's Unit

250000 Kilogram --> No Conversion Required

FINAL ANSWER

250000 Kilogram <-- Desired Takeoff Weight

(Calculation completed in 00.004 seconds)

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< Preliminary Design Calculators

Optimum Range for Jet Aircraft in Cruising Phase

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

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

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

Fuel Fraction

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

Takeoff Weight given Empty Weight Fraction Formula

Desired Takeoff Weight = Operating Empty Weight/Empty Weight Fraction
DTW = OEW/E_f

What is empty weight of an aircraft?

The empty weight of an aircraft is the weight of the aircraft without including passengers, baggage, or fuel. Standard empty weight usually includes unusable fuel, full operating fluids, and full engine oil.

How to Calculate Takeoff Weight given Empty Weight Fraction?

Takeoff Weight given Empty Weight Fraction calculator uses Desired Takeoff Weight = Operating Empty Weight/Empty Weight Fraction to calculate the Desired Takeoff Weight, The Takeoff Weight given Empty Weight Fraction formula provides the takeoff weight based on the specified empty weight fraction and the empty weight of the aircraft, to calculate the takeoff weight of an aircraft given the empty weight fraction, you'll need to consider the relationship between the empty weight fraction, the fuel fraction, and the total takeoff weight. Desired Takeoff Weight is denoted by DTW symbol.

How to calculate Takeoff Weight given Empty Weight Fraction using this online calculator? To use this online calculator for Takeoff Weight given Empty Weight Fraction, enter Operating Empty Weight (OEW) & Empty Weight Fraction (E_f) and hit the calculate button. Here is how the Takeoff Weight given Empty Weight Fraction calculation can be explained with given input values -> 20000 = 125000/0.5.

FAQ

What is Takeoff Weight given Empty Weight Fraction?

The Takeoff Weight given Empty Weight Fraction formula provides the takeoff weight based on the specified empty weight fraction and the empty weight of the aircraft, to calculate the takeoff weight of an aircraft given the empty weight fraction, you'll need to consider the relationship between the empty weight fraction, the fuel fraction, and the total takeoff weight and is represented as DTW = OEW/E_f or Desired Takeoff Weight = Operating Empty Weight/Empty Weight Fraction. Operating Empty Weight of the aircraft is the aircraft's weight without including passengers, baggage, or fuel & Empty Weight Fraction is the ratio of the operating empty weight to the desired takeoff weight.

How to calculate Takeoff Weight given Empty Weight Fraction?

The Takeoff Weight given Empty Weight Fraction formula provides the takeoff weight based on the specified empty weight fraction and the empty weight of the aircraft, to calculate the takeoff weight of an aircraft given the empty weight fraction, you'll need to consider the relationship between the empty weight fraction, the fuel fraction, and the total takeoff weight is calculated using Desired Takeoff Weight = Operating Empty Weight/Empty Weight Fraction. To calculate Takeoff Weight given Empty Weight Fraction, you need Operating Empty Weight (OEW) & Empty Weight Fraction (E_f). With our tool, you need to enter the respective value for Operating Empty Weight & Empty Weight Fraction 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 Desired Takeoff Weight?

In this formula, Desired Takeoff Weight uses Operating Empty Weight & Empty Weight Fraction. We can use 3 other way(s) to calculate the same, which is/are as follows -

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

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