When rotor downwash from a helicopter in hover or slow flight close to the ground hits the surface, this turbulent airmass circulates outward, upward, around and away from the main rotors in all ...

Primarily, helicopters, such as the iconic Black Hawk, can hover. This capability is vital when performing rescues from the air, when carefully and steadily descending to land, and in a range of ...

The National Police Air Service of England and Wales notes that "Each helicopter has a maximum endurance of approx two hours," in terms of staying in the air overall, and that "hovering on a hot ...