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displacement hydraulic pumps in the nacelle, driven by the turbine shaft, supplied high-
pressure luid to 18 variable-displacement hydraulic motors on the ground, and these in turn
drove a synchronous generator. This allowed lexibility in the rotor speed and in the
control system. A third unconventional feature was the use of new, non-aircraft airfoils de-
signed by the manufacturer for very high lift. The system was found to have large power
losses in the hydraulic drive and an aerodynamic performance which did not meet
expectations. Although it did attain a power output of 1.1 MW, a very high wind speed
would have been required to achieve its 3-MW rating.
Figure 3-19. The Schachle-Bendix 3-MW HAWT.
(
Courtesy of Southern California
Edison Co.
)
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