Donald H. Mansfield is Manager of Bladed Rotor Application Engineering for Elliott Company, Ebara Group, in Jeannette, Pennsylvania. He has 37 years of experience in the Compressor and Turbine Application Engineering, Project Management and Marketing groups within Elliott Company. Currently, he is responsible for steam turbine, gas expander and axial compressor selection standards, specification reviews and all aspects related to proposal preparation for new and rerated equipment. Mr. Mansfield received a B.S. degree (Mechanical Engineering, 1970) from the University of Pittsburgh.