Turbine Blades

Employees prepare the piping which will deliver resin to layers of fiberglass fabric in a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Employees place a mesh material on top of layers of fiberglass fabric as they manufacture a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Employees smooth layers of fiberglass fabric in a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Employee Ron Bruxvoort secures a plastic cover on the outside of a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The blade was left unpainted on the exterior because it was one of three being used for performance testing. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Ron Bruxvoort

A piece of fiberglass fabric is trimmed at the edge of a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Anthony Gray secures a strip of fiberglass fabric along the edge of a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Anthony Gray

Employees including Kaylee Stahelman, center, place a mesh material on top of layers of fiberglass fabric as they manufacture a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Kaylee Stahelman

Employee Kaylee Stahelman walks the length of a 160-foot wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Kaylee Stahelman

Employee Jenny Bullard applies adhesive tack around the enge of a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Jenny Bullard

Employee Kristin Carley smooths layers of fiberglass fabric in a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Kristin Carley

Employee Diane Hovenga secures plastic over the fiberglass fabric used to make a structural suppport for a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. Once the part is sealed with plastic a vacuum removes air and resin is pumped in to saturate and cure the part. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Diane Hovenga

Employee Jennifer Gilkison uses a sander as she prepares a finished wind turbine blade for paint at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Jennifer Gilkison

Employee Eric Callaway makes a repair to the exterior of a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Eric Callaway

Employee Eric Callaway makes a repair to the exterior of a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Eric Callaway

Fiberglass fabric is trimmed at the edge of a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Employee Eric Callaway, right, makes a repair to the exterior of a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Eric Callaway

Employee Eric Callaway makes a repair to the exterior of a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Eric Callaway

Employee Eric Callaway makes a repair to the exterior of a wind turbine blade at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Eric Callaway

Employee Jennifer Gilkison uses a sander as she prepares a finished wind turbine blade for paint at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Jennifer Gilkison

An employee makes a repair to a wind turbine blade structural support, called a web, at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Dillon Schultz smooths the first of many layers of fiberglass fabric to be layed in a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Dillon Schultz

Dillon Schultz, left, and Kyle Brown straighten a seam between layers of fiberglass fabric in a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Dillon Schultz; Kyle Brown

Dillon Schultz, left, and Kyle Brow, center, look on as Randy Allen makes an adjustment to a layers of fiberglass fabric in a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Dillon Schultz; Kyle Brown; Randy Allen

Dillon Schultz, pulls a piece of fiberglass fabric into a wind turbine blade mold at TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg *** Local Caption *** Dillon Schultz

Completed wind turbine blades sit outside TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Completed wind turbine blades sit outside TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg

Completed wind turbine blades sit outside TPI Composites, Inc., in Newton, Iowa, U.S., on Friday, June 22, 2012. The company makes blades for General Electric Co's renewable energy business. Photographer: Daniel Acker/Bloomberg