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Aerodynamics Intermediate

02 The Lift Equation

Everything so far compresses into one line: L = 12 ρ V² S C_L Density, speed squared, wing area, and a coefficient hiding the shape and the angle. This lesson is pure calculation. Work in SI units, state the unit with every answer, and round only at the end; answers are checked against a tolerance, not a keyword list.

Step 2 / 4

Same air, full equation. With ρ = 1.225 kg/m³ , V = 50 m/s, wing area S = 16 m² , and lift coefficient C_L = 0.6 , compute the lift L = 12 ρ V² S C_L . Answer in N.

Hints

Build it in stages: dynamic pressure first, then multiply by S , then by C_L .
At this speed q = 1531.25 Pa.
Lift is a force, so newtons. This one comes out to about 1.5 tonnes-force, a plausible light twin.