| 摘要 |
The machine comprises a rotatable housing 3 having an inlet portion 3a of reducing cross section, an intermediate portion 3b containing a rotor 22, and an outlet portion 3c of increasing cross section. The roof of the inlet portion comprises an adjustable flap 7 for controlling the air flow through the housing. The rotor 22 is preferably mounted horizontally and is of generally a number of blades extending radially cylindrical form. The rotor comprises from a central core and joining end cheeks (25, Fig. 2) to form enclosed spaces. The rotor is coupled to power take-off means such as electric generators 31, 32 which are successively brought into operation as the rotor speed increases. The device may be mounted on a turntable 2 to permit rotation into the wind. <IMAGE>
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