The turbine rotor of the 60kW machine is 15.9m diameter and the turbine rotor of the 100kW machine is 19.1m diameter. Both have an operating hub height of 15.5m and nominal operating speeds of 45.8 and 41.3 rpm respectively. Each turbine blade is equipped with an air brake mechanism of the twist tip type. In each rotor set, one blade is fitted with the master overspeed sensing device and the two remaining blade tip brakes are linked by Bowden type cables so that they are released simultaneously when the master blade tip is released. This arrangement ensures that aerodynamic braking is shared equally by the three blades, and avoids unbalanced loading on the rotor and attendant vibration, possible when the tip brakes operate individually. Once released, the tip brakes have to be manually reset, using a special lever from the access platform.

Each wind turbine has a large disc brake on the main shaft, which is acted upon by two independently controlled, fail safe, spring applied brake calipers to stop the machine at full power on command, and to act as a parking brake to prevent rotation when the machine is shut down.

The mechanical power transmission, which increases the speed of the turbine shaft to conventional generator speed and the generator itself, are housed within the nacelle enclosure at the top of the tower. Also enclosed in this space is a compressor, and the necessary control devices to release the main shaft brakes on command from the main control panel.

The turbine is pointed into wind by a wind powered yaw drive, consisting of twin "fantail" rotors, a roller chain drive, and a gear set which rotates the nacelle on the top of the tower.

The machine is automatic in operation, and designed to run unattended. It is self starting when there is adequate wind strength.

Safe operation and automatic shut down are ensured by a number of inbuilt self checking systems. When any of these are activated, a shutdown is initiated and indication of the cause given to assist in diagnosis and allow prompt remedial action when required.