Foil Drag Coefficient Calculator

Drag coefficient (C_D):

Drag force (D):

Density of fluid (ρ):

Flow velocity (V):

Reference area of the foil (A):

How This Is Calculated

$$ C_D = \frac{D}{0.5 \rho V^2 A} $$ where:

C_D = Drag coefficient (dimensionless)

D = Drag force (N)

ρ = Density of fluid (kg/m³)

V = Flow velocity (m/s)

A = Reference area of the foil (m²)

Assumptions

Flow is steady and two dimensional.
Fluid is incompressible.
Foil is thin.
Viscous effects are ignored.
Angle of attack is below stall angle.

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Aspect Ratio

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Coefficient of Pressure