Abstract: An in-line energy generating system for a fluid passing there through where the system has a tubular turbine having an internal bore that includes at least one helical groove defined by an indented portion and a raised portion, whereby the kinetic energy of the fluid flowing through the helical groove drives the generally tubular turbine in a rotational manner at least in part by the frictional force exerted by the fluid as it flows through the helical groove, and a magnetic portion for inducing electrical current in an induction coil positioned around the turbine within the housing.