Which of the following is not a factor affecting stall speed?

Stall speed is primarily influenced by aerodynamic factors and the design characteristics of the aircraft. Among these factors, wing configuration, bank angle, and center of gravity all play critical roles in determining stall speed.

The wing configuration relates to the design of the wings and can include things like the amount of flaps extended. When flaps are deployed, for instance, they increase the lift produced by the wings at lower speeds, which can lower the stall speed.

Bank angle affects stall speed because as an aircraft banks, the load factor increases, which subsequently raises the effective stall speed. In a turn, the wings must generate more lift to counteract this increased load, thereby changing the stall characteristics.

The center of gravity (CG) is also significant because if the CG is too far forward or too far back, it can affect the aircraft's stability and control, as well as its stall characteristics. A forward CG typically increases stall speed, while a rearward CG can reduce it but makes the aircraft more difficult to control.

Throttle position is less directly related to stall speed. While it influences the overall performance and power of the aircraft, it does not inherently change the stall speed itself. Essentially, stall speed is defined for a given configuration, weight, and aerodynamic setup