What is an implication of having frost on an aircraft?

Frost on an aircraft can significantly impair its performance, particularly during critical phases of flight such as takeoff. When frost accumulates on the wings and control surfaces, it disrupts the smooth airflow over these surfaces, causing a reduction in lift. This aerodynamic change can lead to a stall at lower speeds than normal, making it particularly dangerous during takeoff when the aircraft is expected to generate lift efficiently.

During takeoff, any impediments to airflow, such as frost, can cause the aircraft to need a longer runway to achieve the necessary speed for lift-off or can even prevent the aircraft from becoming airborne at all. In extreme cases, it can result in loss of control, which is why proper pre-flight checks for frost and ice accumulation are critical to ensure safe takeoff and flight operations.

The other options do not accurately reflect the adverse effects of frost on the aircraft. Frost does not enhance lift, is not harmless to performance, and primarily affects lift-generating surfaces rather than just the landing gear.