The pitching moment itself is a torque that tries to rotate the aircraft nose up or down. When the aircraft experiences a change in angle of attack, the distribution of lift along the wings can create a moment around the aircraft’s center of gravity, leading to pitching motion.
- lt: This could represent the distance from the aircraft’s center of gravity to the aircraft’s aerodynamic center along the horizontal axis (usually the longitudinal axis).
- Lt: This might represent the change in the total lift force acting on the aircraft.