Don Deardorff, P.E., Senior Application Engineer for Foundation Supportworks, recently presented at the Deep Foundation Institute (DFI) Helical Foundations and Tiebacks seminar in Dallas, TX. His research project, “A Comparison of Gear Motor Performance Curves for Helical Pile Installation,” documented the efficiencies of eight different drive-head motors at all ranges of differential pressure. The effects of varying equipment, flow rate, and hydraulic hose diameter were also observed in order to see what changes occurred in relation to torque and pressure. Based on his evaluations, Don was able to create motor specific torque versus differential pressure curves for Foundation Supportworks installing contractors to utilize during the installation of foundation stabilization systems. He concluded that the actual performance of a given drive-head motor during helical pile installation may not reflect the manufacturer’s stated performance data when criteria such as equipment, flow rate, and hose diameter are taken into account. The DFI event was attended by over 80 engineers, professors, and foundation repair contractors from all over the world. The Deep Foundations Institute is a non-profit association which promotes understanding and advancement of the deep foundations and excavations construction industry through conferences, publications, and community.