Abstract: A method of transferring waste water includes providing a hydro-powered fluid transfer device, the device including a fluid exhaust, a conduit configured to transfer fluid from a wastewater treatment facility to the exhaust, and a fluid accelerating device located adjacent to the fluid exhaust and configured to accelerate fluid past the fluid exhaust. The fluid accelerating device is approximately shaped as a portion of a cone. The method includes inserting the fluid exhaust and the fluid accelerating device at a location in a body of water having a current, whereby current flowing through the fluid accelerating device induces a suction that causes waste water to flow from the wastewater treatment facility to the fluid exhaust.

Abstract: Power plant (10) for the generation of electrical power using wind power or wind energy, comprising a plurality of windmills (12, 14, 16) each comprising a mill tower, a rotor (18, 20, 22) with a shaft (32) being rotatably journalled in said mill tower, a fluid pressure generator (34) mounted in said mill tower and being coupled to and driven by said shaft for delivering pressurised fluid to a pressure channel (36). A pressure accumulating reservoir (42) communicates with said pressure channels for receiving said pressurised fluid therefrom, and a pressure driven electrical power generator (48) connected to said pressure accumulating reservoir is driven by said pressurised fluid for generation of electrical power. Also disclosed are a windmill for use in such a powerplant and a method of producing electrical power from wind energy.

Abstract: A pressure storage structure for use in air is disclosed.

Abstract: An impulse-type “wave motor” employs a seabed-mounted or supported structure mounting a wave energy absorbing panel on a hinged lever arm for reciprocation motion to obtain optimal absorption of wave energy from wave motion in the sea. For deepwater wavelengths of L, the panel is optimally positioned in a region within L/2 depth from the sea surface. The panel motion is coupled by a connecting rod to a fluid pump which generates a high-pressure fluid output that may be used to drive a reverse osmosis desalination unit or to produce other useful work. Seawater or brackish water may be desalinated through reverse osmosis membranes to produce water quality for consumption, agricultural, or other uses. The submerged operating environment of the device in a region of one-half the design wavelength provides the maximum available energy flux and forced oscillations. The pump may be of the positive-displacement piston type, plunger type, or multi-staging driver type, or a variable volume pump.

Abstract: This invention relates to a wind mill which is designed to convert rotational energy to mechanical energy to drive one or more pistons to raise a liquid such as water to an elevated location if necessary at a positive pressure. In addition, the present invention may be adapted to pressurize a medium, such as a gas, for storage in a reservoir.

Abstract: A high-efficiency energy conversion system and method which is able to use a low volume air flow source such as a vacuum cleaner to turn a drive means and generate rotary energy. The system and method includes a water-filled container and a drive means which is selectively made more or less buoyant at various points of rotation. The system includes leverage arms and balloon elements. It may be made of smaller components for domestic use or larger components for an industrial-type usage.

Abstract: A pendulum member swings right and left relative to an air compressor remaining still in a fixed position. As a result, the air compressor slides relative to and from end to end of a piston chamber of the pendulum member. The air compressor compresses air in a portion of the piston chamber forward with respect to a sliding direction of the air compressor, and decompresses air in a portion of the piston chamber rearward with respect to the sliding direction. This action is repeated continuously whereby compressed air in the forward portion of the piston chamber flows through a wind turbine chamber to the rearward portion of the piston chamber. The series of air flows forcibly and continuously rotates a wind turbine, which in turn rotates a generator to obtain electricity.

Abstract: A wind power plant with a tower, a gondola carried by the latter so as to rotate about a horizontal axis and a rotor mounted in the gondola, the tower containing an evaporator and a vapor compressor mechanically driven by the rotor by a gear.

Abstract: An aeration device that converts wind energy into mechanical energy to drive a pump. The aeration device has a wind-driven rotor member that activates the pump by magnetic or mechanical forces. The pump is fixed within a housing. An aeration line extends from the housing through a ballast unit. An aeration tube is sealed to said aeration line via a barbed connection. The aeration tube extends downwardly, terminating in a foot valve. An anchor rope adjacently follows the aeration tube away from the ballast unit, where the anchor rope is fixed to an anchor, to secure the aeration system in place. Whereby when the wind-driven rotor members rotate about a rotor shaft, air is pumped from the pump out through the foot valve, to aerate the water.

Abstract: A system for pumping water from a well (32) drilled into an underground water source (44) that is operable in association with the windmill (10) having a tower frame (14), a wind driven turbine (12), and a reciprocating pump shaft (16) operably connected to the turbine. The system includes an air pump (20) mechanically linked to the reciprocating pump shaft (16) of the windmill (10) and operable by the direct reciprocating motion of the shaft (16). The air pump (20) operates through the reciprocating motion of the windmill shaft (16) and delivers a flow of compressed air into the well (32) down to a point below the water level within the well (32). An air lift fluid pump (20, 36) is positioned within the well (32) and comprises a submerged mixing chamber wherein compressed air is injected into the mixing chamber forming a buoyant air-water mixture. This buoyant mixture flows towards the surface which in turn draws water up through the fluid conduit (38) to the surface.

Abstract: A Totally Enclosed Wind Powered Turbine For Producing Electricity

Abstract: This invention relates to a wind mill which is designed to convert rotational energy to mechanical energy to drive one or more pistons to raise a liquid such as water to an elevated location if necessary at a positive pressure. In addition, the present invention may be adapted to pressurize a medium, such as a gas, for storage in a reservoir.

Abstract: A system for pumping water from a well (32) drilled into an underground water source (44) that is operable in association with the windmill (10) having a tower frame (14), wind driven turbine (12), and a reciprocating pump shaft (16) operably connected to the turbine. The system includes an air pump (20) mechanically linked to the reciprocating pump shaft (16) of the windmill (10) and operable by the direct reciprocating motion of the shaft (16). The air pump (20) operates through the reciprocating motion of the windmill shaft (16) and delivers a flow of compressed air into the well (32) down to a point below the water level within the well (32). An air lift fluid pump (20, 36) is positioned within the well (32) and comprises a submerged mixing chamber wherein compressed air is injected into the mixing chamber forming a buoyant air-water mixture. This buoyant mixture flows towards the surface which in turn draws water up through the fluid conduit (38) to the surface.

Abstract: This is an energy generation system which generates this energy by pressurizing a gas. As input force, the high water pressure of a large body of water, with a depth of about 300 meters is used. Input force is water pressure only, as external force applied on the Pascal hydraulic press small area piston. The result of mechanic force input, the force multiplication-utilizing underwater pressure times the hydraulic press multiplier effect, is the generation of thermal energy. The large area non-conducting piston side of the hydraulic press, compresses said gas above it to {fraction (1/17)} of its' initial volume.

Abstract: A vehicle driven by at least one motor driven propeller has a windmill apparatus with multiple pairs of blades to enhance power output, lift and propulsion. Several clutches are used to engage and disengage the windmill and the motor.

Abstract: A windmill having a plurality of radially extending blades, each being an aerodynamic-shaped airfoil having a cross-section which is essentially an inverted pan-shape with an intermediate section, a leading edge into the wind, and a trailing edge which has a flange doubled back toward the leading edge and an end cap. The blade is of substantial uniform thickness. An air compressor and generator are driven by the windmill. The compressor is connected to a storage tank which is connected to the intake of a second compressor.

Abstract: An oscillating fluid flow motor and an in-stream fluid flow power system that converts the energy in the flowing fluid to mechanical energy through a vane that automatically sweeps back and forth across the flow. The oscillating fluid flow motor consists of (1) a vane having a concave front face confronting the flow of fluid, (2) an elongated swing arm attached at one end to the vane, and (3) a direction control mechanism operatively coupled to the swing arm. The direction control mechanism is configured to rotate the swing arm about its longitudinal axis to re-orient the vane and thereby change the direction the vane moves across the stream.

Abstract: A wind energy conversion system employs a wind turbine means mounted on a frame, said wind turbine having a venturi configured shroud with a core and a plurality of blades fixedly mounted between the core and the throat of the venturi. The blades have an air foil design consisting essentially of an inverted pan-shaped, cross-sectional configuration to create high torque at low air speed.

Abstract: An electric power generator apparatus that generates electrical power from the tidal movements of a body of water by employing multiple energy producing systems. Those energy producing systems include: (1) a moveable tank system associated with hydraulic cylinders in which the upward and downward movements of the tank relative to the tide are used to generate electrical power; (2) an enclosure system in which the controlled inflow and outflow of water between the enclosure and the surrounding body of water is used to generate electrical power; (3) a bellows system in which the effects of the tidal movements are used to force water from the bellows tank through a generator thereby producing electrical power; and (4) a buoyant mass-actuated piston system in which the movement of floating objects (such as docked ships) relative to the tide is used to generate electrical power.

Abstract: The present invention is a device that can obtain fresh water from fog. The fog water collecting device comprises a vertical shaft, windmill elements for producing rotational force from wind, a cylindrical rotating structure supported so as to rotate about the vertical shaft, a water collecting vessel secured at the bottom of this rotating structure, a plurality of flexible rods one end of each is fixed at the upper portion of the rotating structure and the other end of each is directed toward the water collecting vessel and, a receiving conduit for obtaining water collected in the water collecting vessel. When the rotating structure turns from fog containing wind, water droplets sequentially adhere and accumulate on the flexible rods, then collect in the water collecting vessel, and are subsequently directed toward an external destination via the conduit.

Abstract: A vertically reciprocating and substantially constant power drive unit, including pumping equipment situated at the bottom of a string of drive rods is provided. The drive unit comprises a linear electric motor whose field inductor and whose armature are constituted by two coaxial cylindrical parts, one of which is coupled to the top end of the drive rods and is movable relative to a stationary structure. A balancing device exerts a force on the moving equipment constituted by the pumping equipment, the rods, and the motor coupled thereto, which force is equal and opposite to the sum of the weight of the moving equipment plus one-half the weight (H/2) of the load.

Abstract: Disclosed is a two cylinder water well pumping system which uses the wind as a primary driving force with an alternate electric motor drive for use when the wind force is not adequate. The wind drives a square wheel turbine which in turn drives a swash plate which provides a cam surface which then drives a semaphore assembly directly or indirectly connected to sucker cables in turn connected to two pistons carried, respectively, in two cylinder sleeves. The inclined angle of the swash plate alternately drives the pistons to pump water from a well into a storage tank also serving as a mainmast supporting said turbine. In an alterenative embodiment, an electric motor is connected to drive an osillatable bar on a mechancial relay. The oscillatable bar is connected by cables to the semaphore assembly, and may be disconnected from the semaphore assembly by a solenoid. In this embodiment, the sucker cables are connected to the rockable bar in the mechanical relay rather than to the semaphore assembly.

Abstract: A windmill driven pump having rotatable windmill vanes attached to a turning shaft. A disk is eccentrically mounted on the shaft so that both the disk and shaft rotate along with the vanes. Bearings selectively cooperate with the disk to transfer the rotational movement of the disk to a reciprocally movable beam. A pulley system transfers the movement of the beam to a sucker rod for a pump. A locking device is also provided which can prevent the bearings from cooperating with the disk and thus disengage the pump from the rotation of the windmill.

Abstract: A wave power generating system for generating electricity using natural wave power, includes wave energy converters for converting wave energy into air pressure, a constant air pressure tank for storing the air pressure from the wave energy converters to equalize the fluctuation of the air pressure, an air turbine stationarily driven by the equalized air pressure, and an electric generator for generating stable electricity using the rotating power of the air turbine. The wave energy converters are settled to the bottom of the sea and are sufficiently tall to function as wave dissipation facilities. The air pressure in the constant air pressure tank is automatically controlled toward a target value by a controller and the target value is calculated by the controller in accordance with measured values of wave amplitude and period and the current air pressure of the constant air pressure tank.

Abstract: A floating water turbine for taking the kinetic energy from linear current flow and converting it into mechanical energy and subsequently into electrical energy. The turbine is constructed of a buoyant material to support itself on top of the water, thereby eliminating any drag from the apparatus.

Abstract: A loop pump (1) for pumping liquid, i.e. a pump comprising a pipe (3) or the like embodied in a plurality of turns/loops. The pipe is rotated by a drive source to introduce alternately air and liquid into an inlet (4) and to pump the liquid to a drawing place by way of a conduit (6) or the like rotatably connected with the pipe. The drive source, which may be a propeller (8), absorbs the flow energy of the liquid. A floating body (10) gives the pump the desired floatability on the liquid and the pump includes an anchor (11) for anchoring it relative to the surroundings of the flowing liquid.

Abstract: A windmill is provided having a flywheel attached to the fan shaft and an upwardly extending crank link which is cranked by crank pin mounted off-center on the face of the flywheel. The crank link rocks a rocker beam which may, for example, actuate a pump. The crank link and pump are pivotably attached by sleeves on the rocker beam whereby the amplitude of the rocking motion imparted to the beam and the pump may be adjusted by adjusting the positin of the sleeves along the beam. Counterweights may be provided on the rocker beam for giving the crank link a pulling or a pushing function.

Abstract: A flotation platform supports a mast assembly through which a drive shaft extends having a wind driven turbine on the upper end and a propeller on the lower end situated below the water surface. The propeller is rotated by the wind turbine and causes localized water circulation in the body of water in which the mill is situated thus aerating and mixing the water in the summer and also maintaining an ice free area around the mill in winter.

Abstract: An improved hydroelectric system provides automatic adjustment for both tidal (reversing) and river (one way) type flow. A plurality of parallel, axial flow auger-type impellors are mounted in a horizontal plane on a floating, inverted-dry-dock type vessel that has an upper deck mounting hydroelectric generators. The vessel has no bottom beneath the impellors but has parallel with them on each side a tank for buoyancy and level and flow control. Over and under the impellors are pivoting deflectors that direct flow onto the impellors and automatically reverse and rest against appropriate bumper stops when the flow reverses, from one open end to the other open end of the vessel.

Abstract: Water supply system comprising a unit for converting the wind energy into kinetic energy, a unit for converting the kinetic energy into another usable form of energy and a unit for supplying water driven by that usable form of energy. According to the improvement, the unit for converting the wind energy is a wind motor (1) having rotor blades (41) and a control mechanism (42) for constant load on the rotor blades (41) independently from the wind intensity, the unit for converting the kinetic energy is a device for compressing the air to a pressure greater than that of the atmosphere and the unit for supplying water comprises a natural or artificial source of water such as a well (21) or a container operated by pressurized air and structure for temporary storage of the water and for controlling the water bailing from the source of water.

Abstract: A small-scale hydroelectric generator has a micro-hydro axial-flow turbine mounted in a lower end of a penstock, preferrably of the siphon type, through which water is diverted from an intake basin. The turbine comprises a stator section formed with an axial core providing an annular passageway having an outlet end in close proximity to a rotor of a coaxial adjacent rotor section. The blades of the rotor have a length equal to the internal radius of the passageway. A plurality of flaps are arranged in an expandable circle between the stator section and rotor. A float mechanism located in the intake basin follows the water level and controls the extended positions of the flaps reducing the water flow through the penstock in a predetermined relation to the water level. The annular passageway has fixed vanes directing the stream of water in a helical swirling motion of predetermined pitch to impinge upon the blades which are disposed to receive the stream at an optimum angle of 90.degree. .

Abstract: A rotary hydraulic engine is disclosed having a stationary crankshaft with an eccentric crank portion disposed thereon. A housing is rotatable about the crankshaft. At least two pairs of cylinders are connected to the housing and extend quadrilaterally therefrom. A piston is slidingly disposed within each cylinder, and is connected to an oppositely disposed piston so as to move in tandem when propelled by a fluid under pressure. An external valve mechanism is provided which is connected to the cylinders so as to sequentially actuate the pistons contained therein when supplied with fluid under pressure. A scotch yoke assembly integrates the motion of the pairs of pistons into a balanced array of weight and force vectors rotating around the axis of the eccentric crank portion of the stationary crankshaft. This sequential reciprocation of the pairs of pistons imparts a rotary motion to the housing, the rotary motion in turn causing the housing to act as a flywheel.

Abstract: A counterbalance wheel for a wind machine includes a wheel, a counterweight attached to the rim of the wheel, a cranking means for the wheel, and a frame constituting a support stand. By evenly distributing the loads imposed on the wind machine by a reciprocating pump, the counterbalance wheel is able to increase the efficiency of the wind machine.

Abstract: A manually adjustable constriction or orifice to provide a means for optimizing the hydraulic power being converted to heat in a hydraulic windpower conversion system. The hydraulics and constriction are arranged to obtain the proper conditions necessary so that pressure head is converted to velocity head with the sum of the two remaining constant.Instrumentation to facilitate this optimizing adjustment process. A combination of a pump-speed transducer and a pressure-sensing transducer, along with appropriate electronic circuitry is described which provides an output display of the power being converted to heat.Instrumentation to accumulate and display the total energy converted to heat. Electronic devices and display equipment transform hydraulic power signals into energy signals, totalize the energy signals over time, and periodically display the accumulated energy count.

Abstract: An installation for exploiting the energy of flowing water in a river stream comprising a plurality of anchored pontoons supporting a plurality of waterwheels; the pontoons being arranged in a plurality of rows, the pontoons in each row being in tandem such that they form a multiplicity of longitudinal channels to channel water flow from the front to the rear of the installation and a plurality of transverse channels to channel water flow from the side of the installation to its center; the waterwheels having crankshafts that drive double acting piston pumps.

Abstract: Normally feathered propeller blades of a wind power generating system unfeather in response to the actuation of a power cylinder that responds to actuating signals. Once operational, the propellers generate power over a large range of wind velocities. A maximum power generation design point signals a feather response of the propellers so that once the design point is reached no increase in power results, but the system still generates power. At wind speeds below this maximum point, propeller speed and power output optimize to preset values. The propellers drive a positive displacement pump that in turn drives a positive displacement motor of the swash plate type. The displacement of the motor varies depending on the load on the system, with increasing displacement resulting in increasing propeller speeds, and the converse.

Abstract: A windmill energy system for extracting energy from available wind power comprising a windmill in combination with a compressor pump in an essentially closed loop system with the compressor pump including a tubular upper section having a cylindrical bore forming a piston chamber in which a piston is reciprocated and a lower section having a control chamber, a crankshaft assembly located in the control chamber for reciprocating the piston, a first and second passageway in the lower section, conduit means for interconnecting the first and second passageways with the piston chamber and a heat exchange medium and means rotatably mounted to the crankshaft assembly for opening the first passageway while closing the second and vice versa during consecutive discharge and suction strokes.

Abstract: An elevated and elongated boom is centrally pivoted for rocking movement in a vertical plane through the horizontal plane. Provision is made to align such plane with the direction of the wind. A pair of free wings are mounted on the fore and aft ends of the boom with control panels being oscullatably mounted on such wings for determining by their relative positions and aerodynamic equilibrium reaction thereto the angle of attack of such wings. Provision is made to control the relative positions of the control panels with respect to their respective wings so that the wings have angles of attack of opposite sense, with such senses being reversed as the boom approaches each predetermined limit of its rocking motion.

Abstract: Fluid handling mechanism has a vane with parallel side edges coupled to a crank at one end and to an obliquely transverse guide track at the other end. The vane is closely runningly fitted, between parallel side walls and curved top and bottom walls, executing a longitudinally moving line contact with the curved walls in conjunction with irrotational, purely linear, fluid flow. This contact may range from zero to a substantial clearance. Flow is combined fluidynamic fan effect and positive displacement. The positive displacement portion is increased when two such mechanisms are assembled tandemly, in series, with the vanes piano-hinged together. The four walls form a duct, the ends of which may be ported or valved. The duct may also be closed at its ends to constitute a chamber, allowing the mechanism to serve as a closed cycle regenerative gas engine.

Abstract: An apparatus and method for recovering atmospheric moisture utilizing a wind driven electrical generator for powering a mechanical refrigeration system for condensing atmospheric moisture. A housing is provided forming an atmospheric duct with a turbine mounted therein and drivingly connected to the electrical generator. The refrigeration system includes an evaporator positioned in the atmospheric duct whereon water vapor is condensed. In the practice of the method for recovering atmospheric moisture, electrical current is generated from wind and powers the refrigeration system which includes the evaporator. Atmospheric moisture is condensed on the evaporator and collected.

Abstract: A windmill control system having lever means, for varying length of stroke of the pump piston, and a control means, responsive to the velocity of the wind to operate the lever means to vary the length of stroke and hence the effective displacement of the pump in accordance with available wind energy, with the control means having a sensing member separate from the windmill disposed in the wind and displaceable thereby in accordance with wind velocity.

Abstract: An improved pump for lifting water from an underground source utilizes a wind motor for driving an oil-less air compressor eliminating oil contamination of ground water which is forced to the surface. The wind motor is movable to face the wind by means of a novel swivel assembly which also eliminates the formation and freezing of condensate within the airline from the compressor. The propeller blades of the wind motor and the tail section are formed from a pair of opposed convex air foil shaped surfaces which provide the propeller blades and the tail section with fast sensitivity to slight changes in wind direction and speed. A novel well tower for supporting the wind motor and compressor and for lifting the water from the underground source is an optional modification which requires no welding and eliminates the problem of condensate freezing in the airline going to the well.

Abstract: Apparatus and method for generating electrical power by disposing a plurality of power producing modules in a substantially constant velocity ocean current and mechanically coupling the output of the modules to drive a single electrical generator.

Abstract: A system for the collection and storage of energy, wherein compressed air from any source is utilized to make a fully automatic, sequential series of chamber-to-chamber blow-type vertical water lifts to an elevated water storage reservoir. Potential energy stored in the reservoir is extracted by means of an hydraulic air compressor located below the reservoir and functioning by virtue of the resultant pressure head.

Abstract: A wind turbine to convert wind energy into hydraulic energy by a positive displacement hydraulic pump driven by a wind mill. To the oil outlet of the hydraulic pump, a thermo-sensitive control element is attached, which functions when the oil temperature exceeds a certain limit. By the control element, the oil outlet is closed, suppressed, or opened to ensure safety of equipment and for effective use of energy.

Abstract: An apparatus for converting wind energy to heat is disclosed which includes a wind powered turbine and a positive displacement gear pump which is powered by the turbine and serves to pump a fluid through a flow restricting orifice. This fluid exits from the orifice at a high rate of flow, and the kinetic energy of the fluid flow is converted into heat by a diffuser which is adapted to slow the flow rate of the fluid. In this apparatus the energy consumed by the constant displacement pump is substantially the same function of turbine shaft speed as is the available wind energy, and, therefore, the apparatus of this invention functions efficiently at a wide range of wind speeds. Furthermore, since the wind energy is converted to heat, a relatively low cost constant displacement pump may be used. Internal pump leakage, which is generally regarded as a drawback of low cost pumps, only serves to further heat the fluid being pumped, and in this application does not degrade the efficiency of the apparatus.

Abstract: A prime mover is provided particularly a wind energized prime mover (10) comprising a compressor (20) driven by a wind wheel (22) and arranged simultaneously to charge with compressed air, a first, small capacity reservoir (24) and a second, large capacity reservoir (26), the first reservoir (24) being connected to a compressed air demand and being rapidly charged and depleted in light winds when the compressor (20) is delivering just sufficient air to satisfy the demand and the second reservoir (26) being charged when the compressor (20) is delivering more air than is required, the requirement of the demand being determined by a pressure reducing valve 28 and the nature of the work done, the second reservoir (26) being connected to the demand line (35) across a pressure reducing valve (32) whereby the compressed air therein will be released to the demand when the pressure in the demand line (35) drops below a predetermined minimum.

Abstract: A counterweighted elongate buoyant body that floats on the surface of the sea or a lake has at least one sail supporting mast extending upwardly therefrom as well as vanes that tend to maintain the sails substantially normal to the direction of movement of the wind. The buoyant body is by frame means maintained within the confines of a circular series of piles. The counterweight and means for pivoting each sail from a position normal to the direction of the wind to substantially parallel thereto cooperate to impart a transverse rocking motion to the buoyant body that has an eccentric transverse arcuate member depending therefrom that is engaged by a pair of rollers, as the transverse member moves relative to the pair of rollers a bellows is receprocated upwardly and downwardly to draw water into and discharge it from a check valve controlled confined space to a reservoir situated at a substantial distance above the surface of the body of water.

Abstract: A combination wind rotor and output energy transducer to provide output energy from the system and to automatically regulate the wind rotor at all wind velocities to thereby allow the wind rotor to operate at a constant tip speed/wind velocity ratio and at its maximum efficiency. The energy transducer is a combination of positive displacement hydraulic pump and an orifice in the hydraulic system to generate heat. Overspeed protection is afforded by maximum hydraulic loading of the wind rotor in extreme wind conditions.A wind rotor steering system by which the wind rotor is oriented into the wind at all wind velocities. The wind rotor restoring torque is automatically in balance with its reaction torque.

Abstract: A method and apparatus for generating electricity from wind energy, wherein a wind wheel is connected to drive an energy converter which effects a torque reaction on the wind wheel proportional to the square of the rotational speed of the wheel, so that the wheel may be operated at fixed blade pitch and the blade tip speed will be proportional to the wind speed. The wind wheel may be connected to drive an electric generator to generate electrical energy in synchronism with mains supply.