The author suggests a new method and a new inexpensive, large blade-rope type wind rotor, that will be suspended at high altitude and produce huge quantities of energy. The air installation embodiment includes (FIG. 25): propeller 220, wing 226, rope transmission 229, electric generator 12 located at ground. Water rotors can utilize energy of ocean and sea streams. The invention contains 11 projects: 6 for air, 1 for a river, 3 for the sea and ocean, and 1 for ships. They have a power capacity of up to 60 MgW (air), up to 200 MgW (water) for one unit. The suggested installations have the following advantages: 1. Huge power production capacity-up to 5000-10000 times more than conventional ground-based rotor designs. 2. The rotor operates at high altitude of 1-14 kilometers, where wind has high speed and high stability (permanent flows). 3. The installation is much less expensive compared to conventional currently-employed windmills, partly because no tower is necessary to fix the rotor in space. 4. Wind energy is free -environmentally friendly.