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Empty Weight given Empty Weight Fraction Calculator

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Preliminary Design Conceptual Design

✖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.ⓘ Desired Takeoff Weight [DTW]			+10% -10%

✖Operating Empty Weight of the aircraft is the aircraft's weight without including passengers, baggage, or fuel.ⓘ Empty Weight given Empty Weight Fraction [OEW]

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Formula

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Empty Weight given Empty Weight Fraction

Formula

OEW = E f \cdot DTW

Example

125000 kg = 0.5 \cdot 250000 kg

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Empty Weight given Empty Weight Fraction Solution

STEP 0: Pre-Calculation Summary

Formula Used

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

Variables Used

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.
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

Empty Weight Fraction: 0.5 --> No Conversion Required
Desired Takeoff Weight: 250000 Kilogram --> 250000 Kilogram No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

OEW = E_f*DTW --> 0.5*250000

Evaluating ... ...

OEW = 125000

STEP 3: Convert Result to Output's Unit

125000 Kilogram --> No Conversion Required

FINAL ANSWER

125000 Kilogram <-- Operating Empty Weight

(Calculation completed in 00.004 seconds)

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< Preliminary Design Calculators

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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

Empty Weight given Empty Weight Fraction Formula

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

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 Empty Weight given Empty Weight Fraction?

Empty Weight given Empty Weight Fraction calculator uses Operating Empty Weight = Empty Weight Fraction*Desired Takeoff Weight to calculate the Operating Empty Weight, The Empty Weight given Empty Weight Fraction is the weight of the aircraft when it is empty, including the weight of the structure, engines, systems, and other components, by multiplying the Empty Weight Fraction by the maximum takeoff weight, you can determine the empty weight of the aircraft, this calculation allows you to estimate the empty weight based on the specified values. Operating Empty Weight is denoted by OEW symbol.

How to calculate Empty Weight given Empty Weight Fraction using this online calculator? To use this online calculator for Empty Weight given Empty Weight Fraction, enter Empty Weight Fraction (E_f) & Desired Takeoff Weight (DTW) and hit the calculate button. Here is how the Empty Weight given Empty Weight Fraction calculation can be explained with given input values -> 125000 = 0.5*250000.

FAQ

What is Empty Weight given Empty Weight Fraction?

The Empty Weight given Empty Weight Fraction is the weight of the aircraft when it is empty, including the weight of the structure, engines, systems, and other components, by multiplying the Empty Weight Fraction by the maximum takeoff weight, you can determine the empty weight of the aircraft, this calculation allows you to estimate the empty weight based on the specified values and is represented as OEW = E_f*DTW or Operating Empty Weight = Empty Weight Fraction*Desired Takeoff Weight. Empty Weight Fraction is the ratio of the operating empty weight to the desired takeoff weight & Desired Takeoff Weight (or mass) is the weight of the aircraft.

How to calculate Empty Weight given Empty Weight Fraction?

The Empty Weight given Empty Weight Fraction is the weight of the aircraft when it is empty, including the weight of the structure, engines, systems, and other components, by multiplying the Empty Weight Fraction by the maximum takeoff weight, you can determine the empty weight of the aircraft, this calculation allows you to estimate the empty weight based on the specified values is calculated using Operating Empty Weight = Empty Weight Fraction*Desired Takeoff Weight. To calculate Empty Weight given Empty Weight Fraction, you need Empty Weight Fraction (E_f) & Desired Takeoff Weight (DTW). With our tool, you need to enter the respective value for Empty Weight Fraction & 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 Operating Empty Weight?

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

Operating Empty Weight = Desired Takeoff Weight-Fuel Weight to be Carried-Payload Carried-Crew Weight

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