Writes Newsweek:
The X-Hawk is the first helicopter built to maneuver in tight spaces. Developed by Israeli helicopter company Urban Aeronautics, the X-Hawk is a "rotorless" aircraft. Whereas top-mounted rotors make it hard for conventional choppers to avoid buildings and power lines, the X-Hawk's rotors are encased inside ducts and mounted on the tail. Small vanes in the front and back of the ducts allow the helicopter to move forward and backward, or right and left, without rolling. Though the first X-Hawk is not expected to be available until 2010, a prototype passed 10 hover tests with flying colors in DecemberNow, where's my robot maid.