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Lift Efficiency Ratio Calculator

Formula

The formula to calculate the lift efficiency ratio is:

$\text{LER} = \frac{\text{C}_L}{\text{C}_D}$

Where:

$\text{LER}$ is the lift efficiency ratio
$\text{C}_L$ is the lift coefficient
$\text{C}_D$ is the drag coefficient

What is Lift Efficiency Ratio?

The lift efficiency ratio (LER) is a measure of the aerodynamic efficiency of an aircraft. It is defined as the ratio of the lift coefficient (CL) to the drag coefficient (CD). A higher LER indicates a more aerodynamically efficient aircraft, which can generate more lift for a given amount of drag. This ratio is crucial in the design and performance analysis of aircraft, as it directly impacts fuel efficiency, range, and overall performance.

Example Calculation 1

Let's assume the following values:

Lift Coefficient (CL) = 1.5
Drag Coefficient (CD) = 0.3

Using the formula:

$\text{LER} = \frac{1.5}{0.3} = 5$

The Lift Efficiency Ratio is 5.

Example Calculation 2

Let's assume the following values:

Lift Coefficient (CL) = 2.0
Drag Coefficient (CD) = 0.4

Using the formula:

$\text{LER} = \frac{2.0}{0.4} = 5$

The Lift Efficiency Ratio is 5.