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A wind turbine engine comprising rotor blades disposed within an outer casing and a half-spherical head located in front of the rotor blades and blocking the inner 50% of the radius of the rotor blades, the casing and head creating an acceleration chamber wherein incoming wind is speeded up and redi

A wind turbine engine comprising rotor blades disposed within an outer casing and a half-spherical head located in front of the rotor blades and blocking the inner 50% of the radius of the rotor blades, the casing and head creating an acceleration chamber wherein incoming wind is speeded up and redirected around the head, and the accelerated wind then rotates the wind turbine rotor blades to generate power.

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What is claimed is: 1. A fluid turbine, comprising: a rotor and blade assembly, including: a rotor, the rotor being rotatable about a rotation axis; a plurality of blades, each of the blades having a tip, the blade tips defining a blade tip radius with respect to the rotation axis; a fluid displace

What is claimed is: 1. A fluid turbine, comprising: a rotor and blade assembly, including: a rotor, the rotor being rotatable about a rotation axis; a plurality of blades, each of the blades having a tip, the blade tips defining a blade tip radius with respect to the rotation axis; a fluid displacement head arrangement blocking off at least 50% of the blade tip radius from the rotation axis towards the blade tips, the fluid displacement head arrangement shaped to redirect blocked-off fluid towards the blades extending radially beyond a blocked-off area; and a single annular fluid intake scoop and flow through encasement assembly surrounding the rotor and blade assembly, the encasement assembly having an interior surface and an exterior surface, the exterior surface of the encasement assembly being shaped to form an fluid-foil, so as to provide converging fluid flow for augmenting exhaust from the turbine; wherein fluid flowing through the encasement assembly enters the encasement assembly solely through one central opening formed between the interior surface of the encasement assembly and the rotor and blade assembly. 2. The fluid turbine of claim 1, wherein the interior surface of the encasement assembly has a fluid velocity increasing surface forward of the blades, the fluid velocity increasing surface being shaped to increase the velocity of fluid entering the turbine. 3. The fluid turbine of claim 2, wherein the fluid velocity increasing surface is S-shaped. 4. The fluid turbine of claim 3, wherein the interior surface of the encasement assembly has an expanding exhaust channel surface rearward of the blades. 5. The fluid turbine of claim 1, wherein the interior surface of the encasement assembly has an expanding exhaust channel surface rearward of the blades. 6. The fluid turbine of claim 1, wherein the fluid displacement head arrangement is, at least in part, spherical. 7. The fluid turbine of claim 2, wherein the fluid displacement head arrangement is, at least in part, spherical. 8. The fluid turbine of claim 3, wherein the fluid displacement head arrangement is, at least in part, spherical. 9. The fluid turbine of claim 5, wherein the fluid displacement head arrangement is, at least in part, spherical. 10. The fluid turbine of claim 1, wherein each of the blades has a controllable blade pitch. 11. The fluid turbine of claim 1, further comprising a rotatable support constructed and arranged to permit the fluid turbine to be rotatably supported on a support tower. 12. The fluid turbine of claim 1, wherein the blades are in two spaced-apart rows. 13. The fluid turbine of claim 12, further comprising a plurality of flow stabilizers in between the rows of blades. 14. The fluid turbine of claim 1, wherein the fluid turbine is a wind turbine. 15. The fluid turbine of claim 1, wherein the fluid turbine is a water turbine. 16. The fluid turbine of claim 2, wherein the interior surface of the encasement assembly has an expanding exhaust channel surface rearward of the blades. 17. The fluid turbine of claim 1, wherein the fluid displacement head arrangement is, at least in part, spherical; and the interior surface of the encasement assembly has an expanding exhaust channel surface rearward of the blades and an S-shaped fluid velocity increasing surface forward of the blades being shaped to increase the velocity of fluid entering the turbine. 18. The fluid turbine of claim 2, wherein the fluid displacement head arrangement and the velocity increasing surface forward of the blades are positioned with respect to each other so as to compress fluid flowing through the encasement assembly forward of the blades. 19. The fluid turbine of claim 7, wherein the fluid displacement head arrangement and the velocity increasing surface forward of the blades are positioned with respect to each other so as to compress fluid flowing through the encasement assembly forward of the blades.