Jim Thomas asked, “Are the hazards of a helicopter rotor blast taught to new students?” The answer is sometimes and sometimes not. Being dual rated, I understand the affect the rotor down wash can have on an airplane. As an instructor, it is always something I teach to students.
Wind direction and strength must be considered when hovering near other aircraft. For example, when hovering with a strong right crosswind, leave more room between other objects and left side of the helicopter. The rotor downwash will be very strong on the left side and very weak on the right side. I have had line personnel direct me to park too close to another aircraft that was downwind of the rotor wash. I would just touchdown in a better suited area and explain why once they approach the helicopter. Some understood, some did not.
However, it’s not just parked airplanes that can get tossed around. I was on a hospital helipad with another helicopter when the other pilot needed to depart. While he was starting up I was busy finishing some paperwork. There were no obstacles and the wind was calm, so the last thing I expected was for him to depart directly over top of my parked helicopter. That’s exactly what he did causing the blades to flex down, and the fuselage to shake. I was sitting in the helicopter with the door open and fortunately was able to get it closed. If I were to guess, he couldn’t have been more than 10 feet above me. I never understood why he did that.
On another occasion, I was hover taxing along the edge of a ramp to parking when I noticed some smaller airplanes rocking a little and in front of me was a pilot with an open door. I moved out toward an empty taxiway and ATC immediately told me I was too close to an active taxiway. I explained why and he said, “Understand, but you can’t say there.”
It’s unfortunate that students are not taught more about this subject. However, many pilots are aware of their prop or rotor blast and act courteously and try to minimize the impact on others. However, some either don’t understand or care. To protect yourself and your aircraft around an airport or heliport, I think the best advice is to always assume you could be subject to a prop blast or rotor downwash.
Tags: Tim McAdams