NOVELTY - A fluid-powered work generating system has disc turbines, each having an inlet and an outlet and axially-spaced discs (24) interacting with fluids for work generation while respecting fluid kinetic viscosity and rotor angular velocity. A fluid collection device at the inlet captures a substantial portion of fluid prior to entering into the inlet and increases velocity of fluid currents passing through the swept regions. A fluid extraction device derives another fluid portion, delivered at initial pressure and velocity at the outlet, through viscous drag. Inter-disc spacing (25) is adjustable.    USE - Fluid-powered work generating system for producing work and or energy from converting kinetic energy of large cross-sectional areas of fluids in motion e.g. wind, river, surf, ocean, and tidal flows. Can also be used in various applications e.g. solar thermal power capacity, radiant heating, solar-driven cooling systems, water-into-steam thermal power generation, and solar chimney turbines operating from excess heat load build-up within fluid collection and extraction devices. Can also be used in lighter-than-atmosphere environments, such as power generation for terrestrial ground stations, planetary colonization power needs, on-atmospheric power requirements of planetary studies including meteorological or other remote sensing missions, planetary spacecraft, and planetary exploration missions to Mars, Venus, or any of gas giants or fluid-bearing moons.    ADVANTAGE - Enables to produce clean, emission-free, electric, hydraulic, mechanical or alternate work outputs by efficiently converting kinetic energy of large cross-sectional areas of fluids in motion while also offering great power per weight in motionless and quiet packages. Enhances efficiency of extraction of fluid from turbine outlet by using viscous drag principle and by capturing part of fluid prior to entry to turbine inlet. Use of fluids in motion for work or energy generation also helps to reduce global warming effects and even reduce electricity costs when sold to consumers or municipalities. System may be made from simple parts which can be manufactured locally, eliminating or reducing need for overseas parts sourcing or foreign dependence as well as adding new manufacturing and construction jobs to local economies and minimizing extended financial and carbon-impact costs of long-distance shipping and business relationships.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for generating power from fluids in motion.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of an inter-disc spacing adjustment mechanism for a disc turbine.    Control fluid (3)    Housing (4)    Pressure regulator (5)    Discs (24)    Inter-disc spacing (25)