| 摘要 |
<p>A circular foil (10) connectable to a source of power for producing thrust in an axial direction when rotated, includes a flat circular plate (16) and a plurality of closely spaced apart fins (18) fixed to an upper face of the circular plate, which occupy substantially the entire peripheral portion of the plate. A cylindrical hoop (20) is fixed to the plate adjacent the radially inward extending edges of the fins to prevent fluid disposed adjacent to the circular plate and radially inwardly of the fins from flowing radially outward and into the space between the fins as the circular foil is rotated. The foil (10) is rotated at a sufficient speed to discharge fluid molecules (22) from spaces between the fins at a rate faster than they can be replenished. This creates an imbalance of fluid pressure on the first side of the foil relative to an opposite second side. As a result, the circular foil moves in the direction of the deficit.</p> |
