| 摘要 |
<p>Exercising machine having a vaned fanwheel rotatably mounted on a frame in open air and arranged to absorb energy by rotating the vane blades against ambient air. The fanwheel comprises a hub with a plurality of air vanes which are movable in an orbit around the axis of the hub. Each vane comprises a blade having leading and trailing surfaces. In the preferred example shown, each blade is a semi-cylindrical plate mounted with the hollow, concave side comprising the leading surface, and the streamlined, convex side comprising the trailing surface. The vanes are circumferentially spaced apart to substantially eliminate drafting and stagnant wake regions between blades. The coefficient of drag for the concavo/convex vane blades of this invention are substantially twice that obtained by flat plate vane blades conventionally used. Alternative forms of the invention are illustrated with semi-spherical concavo/convex and semi-cylindrical plano/convex blades. All have in common trailing streamlined convex surfaces.</p> |
