What is the stall speed of an airplane under a load factor of 2 G's if the unaccelerated stall speed is 65 knots?

To calculate the stall speed of an airplane under a load factor of 2 G's, you need to understand how load factor affects stall speed. The stall speed increases with the square root of the load factor.

In this specific case, the unaccelerated stall speed is 65 knots. When the load factor is 2 G's, the increased stall speed can be determined using the formula:

Stall Speed with Load Factor = Unaccelerated Stall Speed × √(Load Factor)

Substituting the values:

Stall Speed with Load Factor = 65 knots × √2

Calculating the square root of 2 gives approximately 1.414. Now, we multiply:

65 knots × 1.414 ≈ 91.0 knots

Thus, the stall speed at a load factor of 2 G's is approximately 91 knots. This correctly supports the choice of 91 knots as the answer, as it highlights the relationship between load factor and stall speed, showing that stall speed increases significantly when the aircraft experiences higher loads.