Span Efficiency Factor Calculator

✖The Induced Drag Factor is a function of the Fourier series constants which has been used for the general circulation distribution expression for the finite wing.ⓘ Induced Drag Factor [δ]

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✖Span efficiency factor represents the change in drag with lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution.ⓘ Span Efficiency Factor [e_span]

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Span Efficiency Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Span Efficiency Factor = (1+Induced Drag Factor)^(-1)
e_span = (1+δ)^(-1)
This formula uses 2 Variables

Variables Used

Span Efficiency Factor - Span efficiency factor represents the change in drag with lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution.
Induced Drag Factor - The Induced Drag Factor is a function of the Fourier series constants which has been used for the general circulation distribution expression for the finite wing.

STEP 1: Convert Input(s) to Base Unit

Induced Drag Factor: 0.05 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

e_span = (1+δ)^(-1) --> (1+0.05)^(-1)

Evaluating ... ...

e_span = 0.952380952380952

STEP 3: Convert Result to Output's Unit

0.952380952380952 --> No Conversion Required

FINAL ANSWER

0.952380952380952 ≈ 0.952381 <-- Span Efficiency Factor

(Calculation completed in 00.004 seconds)

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Home » Physics » Aerodynamics » Two Dimensional Incompressible Flow » Lift Distribution » Aerospace » General Lift Distribution » Span Efficiency Factor

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Created by Ravi Khiyani

Shri Govindram Seksaria Institute of Technology and Science (SGSITS), Indore

Ravi Khiyani has created this Calculator and 200+ more calculators!

Verified by Anshika Arya

National Institute Of Technology (NIT), Hamirpur

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< General Lift Distribution Calculators

Lift Coefficient given Span Efficiency Factor

LaTeX Go Lift Coefficient GLD = sqrt(pi*Span Efficiency Factor*Wing Aspect Ratio GLD*Induced Drag Coefficient GLD)

Induced Drag Coefficient given Span Efficiency Factor

LaTeX Go Induced Drag Coefficient GLD = Lift Coefficient GLD^2/(pi*Span Efficiency Factor*Wing Aspect Ratio GLD)

Span Efficiency Factor

LaTeX Go Span Efficiency Factor = (1+Induced Drag Factor)^(-1)

Induced Drag Factor given Span Efficiency Factor

LaTeX Go Induced Drag Factor = Span Efficiency Factor^(-1)-1

Span Efficiency Factor Formula

LaTeX Go

Span Efficiency Factor = (1+Induced Drag Factor)^(-1)
e_span = (1+δ)^(-1)

What is a good span efficiency factor or Oswald efficiency factor?

For conventional fixed-wing aircraft with moderate aspect ratio and sweep, Oswald efficiency number with wing flaps retracted is typically between 0.7 and 0.85. At supersonic speeds, Oswald's efficiency number decreases substantially. For example, at Mach 1.2 Oswald's efficiency number is likely to be between 0.3 and 0.5.

How to Calculate Span Efficiency Factor?

Span Efficiency Factor calculator uses Span Efficiency Factor = (1+Induced Drag Factor)^(-1) to calculate the Span Efficiency Factor, The Span efficiency factor formula calculates the span efficiency factor which represents the change in drag with a lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution. Span Efficiency Factor is denoted by e_span symbol.

How to calculate Span Efficiency Factor using this online calculator? To use this online calculator for Span Efficiency Factor, enter Induced Drag Factor (δ) and hit the calculate button. Here is how the Span Efficiency Factor calculation can be explained with given input values -> 0.952381 = (1+0.05)^(-1).

FAQ

What is Span Efficiency Factor?

The Span efficiency factor formula calculates the span efficiency factor which represents the change in drag with a lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution and is represented as e_span = (1+δ)^(-1) or Span Efficiency Factor = (1+Induced Drag Factor)^(-1). The Induced Drag Factor is a function of the Fourier series constants which has been used for the general circulation distribution expression for the finite wing.

How to calculate Span Efficiency Factor?

The Span efficiency factor formula calculates the span efficiency factor which represents the change in drag with a lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution is calculated using Span Efficiency Factor = (1+Induced Drag Factor)^(-1). To calculate Span Efficiency Factor, you need Induced Drag Factor (δ). With our tool, you need to enter the respective value for Induced Drag Factor 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 Span Efficiency Factor?

In this formula, Span Efficiency Factor uses Induced Drag Factor. We can use 1 other way(s) to calculate the same, which is/are as follows -

Span Efficiency Factor = Lift Coefficient GLD^2/(pi*Wing Aspect Ratio GLD*Induced Drag Coefficient GLD)

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