Abstract: Certain vertical-axis wind and water turbine blades suffer from drag that reduces the turbine's torque and turbine-generated power. Significant drag is generated when the blade is turning upstream on the return side of the turbine. This invention is a blade system that reduces upstream (return) side drag to almost nothing by enabling the turbine blade to tilt or swivel to eliminate almost all fluid resistance to the blade on the upstream side. The result is much increased turbine efficiency, increased torque and power from vertical-axis wind or water turbines. The increased power resulting from this innovative turbine blade system enables the use of gearboxes to increase the RPM of vertical axis turbines for electricity generation, and also enables easier self-starting. Easier to manufacture turbine blades use linear approximations for the curved sections of modified Savonius blade profile.