Which statement regarding helicopter vortices is correct?

The understanding that the size and weight of the helicopter affects vortex intensity is crucial when considering the aerodynamics involved in rotary-wing aircraft. Larger and heavier helicopters generate more significant downwash and stronger vortices due to the greater volume of air displaced by their rotors. This displacement creates a stronger rotational airflow, or vortices, especially during maneuvers and takeoffs or landings when the rotor operates at higher power settings.

In contrast to vortex intensity being equivalent across all helicopter types, it is essential to recognize that variations exist based on factors like rotor size, rotor design, and the overall weight of the helicopter. Thus, larger helicopters typically produce more substantial vortices which can affect other aircraft or operations in the vicinity during flight.