# Lift Force

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Lift force for an body moving through a fluid (gas or liquid), is the force exerted perpendicular to the direction of travel.

## formula

$$L = \frac {1} {2} C_L \rho v^2 A$$

Where:

$$L$$ = lift force

$$C_L$$ = lift coefficient

$$v$$ = velocity

$$\rho$$ = density

$$A$$ = area

Solve for:

$$C_L = \frac {2 L} {\rho v^2 A}$$

$$\rho = \frac {2 L} { C_L v^2 A}$$

$$v = \sqrt { \frac {2 L} { C_L \rho A} }$$

$$A = \frac {2 L} { C_L \rho v^2}$$