Rotor brakes from Twiflex, Ltd., come assembled, provide high levels of reliability, easy electronic monitoring and maintenance, and are available with organic or metallic linings. Models are offered in a range of braking forces from 100 N to 1 MN. Rotor-brake models include the GMR (15 to 35 kN), the VCS (20 to 60 kN), and

Slowing and halting an 80-m wind-turbine rotor involves converting its kinetic energy into heat. The same mechanical transfer occurs, for example, when stopping a large truck. A 40-ton mining truck, for instance, must be able to stop on a steep gradient. This involves a heavy load that opposes braking and provides a comparison to the aerodynamic torque delivered by a turbine rotor.
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