This 3.7-lb. part is used to aid in wind power generation. The customer for the tail fin part of a 1 MW wind generator was experiencing a 50% fall-out rate. Converting it to a permanent mold casting reduced the rate to less than 1%, saving the customer $470,000 annually. The sand blasted permanent mold version for use on land exhibited a denser surface structure than the previous version, providing a better surface finish after sand blasting.
