Originally Posted by
212man
I remember that happening. It would be interesting to see how high the influence of the rotor induced airflow reaches and could affect a parachute descent path in light winds.
It would not bother any parachute, round or ram-air. While the round parachutes were obviously much less maneuverable they do typically have steering vents and are trimmed to provide some forward motion. Both types are sufficiently steerable and have sufficient forward motion to avoid a helicopter running on the ground.