Drone Builders Collective

Lift is not a vague miracle. It is a force produced by a pressure difference over the wing, which itself comes from the wing's shape and angle of attack. A cambered airfoil produces lift at zero geometric angle; a symmetric one needs positive angle. Either way, the wing turns airflow, creating circulation and a pressure imbalance that yields an upward-directed component of aerodynamic force.

This segment explains what the four forces are, how they change, and how they work together to determine an aircraft’s motion. It also introduces airspeed, density, altitude, and energy—the ideas that make the difference between an aircraft that merely flies and one that performs a useful mission.