Short gearbox life now steadily lengthening as technology matures

By Paul Dvorak Wind turbine gearboxes once had a well deserved bad reputation for their short working lives. Not long ago, a two or three-year life was about normal.
Moventas ExtraLife gearbox will provide a four-fold overall life improvement according to computational testing by Sentient Science.
Things are looking up, however. Two companies recently announced improvements to gearboxes that stretch their working life to much longer periods. First, Moventas took the wraps off its Extra Life 1.5-MW gearbox last year and more recently, produced simulations by Sentient Science that point to a four-fold improvement in life. Then at the Wind Energy Update O&M Dallas conference,

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