Hello, I am trying to land from a high altitude (I do this from a semi-hover, that is, a hover that still has me going less then 3 knots), I do this if I miss the approach due to being to high. When I start to decend above the runway and I get around 40 feet from the ground it seems that I start getting sucked in toward the ground and my decent rate increases. This causes my to crash, or damage the helicopter. I tend to see this more if I am decending below 40 feet at 5VS or more. I'm assuming this is a physics thing but can someone explain it better to me? It might help me land safely if I understand what is actually going on.
Also if I get before 40 feet and the rotors are not parallel the the ground, but say at an angle more then 15 degrees it causes the helocopter to become very unstable, even worse then if it's parellel.
Thanks for any help.