It is on a three leg, tilt-down truss tower. The light weight, laminated wood-epoxy composite blades are mounted on a teetering hub and have tip vanes for over speed protection. The blades are designed to stall to keep the power curve within design limits. The rotor is mounted on the 77 rpm low speed shaft of the two stage planetary gearbox which drives at 1800 rpm through a flexible coupling to the induction generator. The clutch style brake mounted on the high speed end of the induction generator and is air released and spring applied.
Controller is a ladder-logic, timer relay configuration and is meter operated.
It is necessary that a complete wind monitoring be undertaken by professional wind energy resource professionals at the outset of the project. The ESI turbine can be expected to produce from 100,000 to 150,000 kwh annually in an average annual wind regime of 13-14 miles per hour. The machines are completely retrofitted with the latest improvements. Copyright 2001 Metal Tiger Technologies. All rights reserved.