This is what I found from my Raum 3.5 wind turbine this morning. The unit has been non-functional since October with all parties involved pointing their fingers at each other trying to lay the blame for all of the problems. The winds were sustained 22 mph at the ground last night and the baldes were spinning despite the brake being on. The failure sent 3 of the blades flying off the hub. The blades landed from 66' to 235' from the tower. One of the blades landed right next to the playset that is under construction for my daughter 160' away. Another, 235' away by laser range finder, had to have flown dierctly over the house and could not have missed hitting the house by more than a few feet. Run away from this product as fast as you can.
I can tell you that when you were shooting this video the winds were way over 30 mph. Truth be told you probably had a major storm that came through. Did you install turbine yourself?
ThePres88888 9 months ago