The lateral aerodynamic force acting on an aircraft due to yaw rate (r) is commonly referred to as “yawing moment” or “side force.” This moment or force is generated because of the aircraft’s yawing motion, which is a rotation around its vertical axis. This yawing motion is typically caused by various factors, including control inputs, crosswinds, or other disturbances.
is the yawing moment per unit yaw rate (measured in Newton-meters per radian per second)
      Qs in dynamic pressure
- m means mass
- is the wingspan of the aircraft (measured in meters).
- is the yawing moment coefficient.