Feather 2 topics · 2 sources ScienceEnergyIn a wind energy conversion system, to pitch the turbine blades so as to reduce their lift capacity as a method of shutting down the turbine during high wind speeds.US DOE Office of Energy Efficiency & Renewable Energy — Glossary of Energy-Related Terms retrieved 2014-05-26 Cite ScienceWaterTo blend the edge of new material smoothly into the old surface. Bureau of Reclamation — Bureau of Reclamation Glossary Cite