Which statement about stall speed in a coordinated turn with bank angle is true?

• A. Stall speed increases with bank angle in a turn.
• B. Stall speed decreases with bank angle in a turn.
• C. Stall speed is unaffected by bank angle.
• D. Bank angle changes only lift, not stall speed.

Answer: (A)

In a coordinated turn, stall speed rises as you increase the bank angle because the load factor grows. When you bank, the aircraft must generate more lift to both support weight and provide the horizontal force to turn. The lift required becomes L = nW, where n is the load factor. As bank angle increases, n increases roughly as 1/cos(bank). With the lift limit fixed by Cl max, you must fly faster to produce the extra lift, so the stall speed in a turn is higher than in straight-and-level flight. A handy way to relate them is V_s(turn) ≈ V_s straight × sqrt(n); for example, a 60° bank (n ≈ 2) pushes stall speed up by about 41%. This is why the correct statement is that stall speed increases with bank angle in a turn. The other options conflict with the physics of lift and load factor in a banked, coordinated turn.