The Stall speed refers to the minimum airspeed at which an aircraft can maintain controlled flight without entering a stall. A stall occurs when the critical angle of attack is exceeded, leading to a disruption in the smooth airflow over the aircraft’s wings. The stall speed increases with an increase in load factor. The relationship between stall speed (V_s​), load factor ($n$), and the clean stall speed in straight and level flight (V_s0​) is given by:

Here:

• V_s​ is the stall speed at a particular load factor.
• $n$ is the load factor.
• V_s0​ is the clean stall speed in straight and level flight.