At the outer ends of the 'umbrella spokes' forks are mounted. These forks catch and guide a rope that glide into the bottom of the fork, where it can not slip easily. But this rope slips out of the fork when it comes closer to lowest part of the circle in which it runs. Combined, these forks act as a V-groove in a pulley. But there is no need for a V-belt! A simple sisal rope has shown to perform very well in transmitting 100 Watt for months on a test rig. ThisSite:/images/WD_Animated.gif

• The rotor of the WindDrive (color yellow) is constructed much like the frame of an umbrella (as shown), or as a bicycle wheel (later to be described). In this rotor sails or wings are mounted. Anything works! Either simple mats woven from grass or high-tech airfoils.
  At the outer ends of the 'umbrella spokes' forks are mounted. These forks catch and guide a rope that glide into the bottom of the fork, where it can not slip easily. But this rope slips out of the fork when it comes closer to lowest part of the circle in which it runs. Combined, these forks act as a V-groove in a pulley. But there is no need for a V-belt! A simple sisal rope has shown to perform very well in transmitting 100 Watt for months on a test rig.