Which of the following influences the stall speed of an aircraft?

The stall speed of an aircraft is significantly influenced by the wing shape and the weight of the aircraft. The stall speed is defined as the minimum speed at which an aircraft can maintain level flight before it experiences a loss of lift and begins to stall.

The wing shape affects the airflow around the wing and its overall aerodynamic efficiency. For example, wings with higher aspect ratios typically generate lift more efficiently and may have a lower stall speed, while wings with larger camber can also impact how quickly lift is generated.

Weight plays a crucial role because an increase in weight requires a greater amount of lift to maintain flight. This means that with a heavier aircraft, the stall speed will increase as the aircraft needs to achieve a higher speed to generate the required lift to counteract the increased weight.

While engine type, fuel load, and propeller size may affect performance characteristics of the aircraft, they are not primary factors in determining the stall speed compared to the influence of wing shape and weight.