Wind turbine having vertical rotary shaft and having movable blade efficiently providing large torque with excellent startability even in weak wind
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System for displaying vehicle width, center position, running direction indication, and braking operation of manual vehicle such as bicycle, stroller, rickshaw, two-wheeled cart and wheelchair
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Efficient solar system removing its loading to building, securing safety and workability by attaching photovolataic module in sunlight to self-supported movable guide
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Buoyancy body tension constant holding machine for missile with buoyancy body, weight of airframe thereof is slightly larger than buoyancy by buoyancy body
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Removing and cleaning mechanism of harmful suspended dust and vaporized substance in atmosphere
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Horizontal holding mechanism and propeller tilt mechanism ofmissile with buoyancy body
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Changeover mechanism in direction of thrust in direction that form angle to vertical central surface of aircraft with buoyancy body
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Safety structure of buoyancy body
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Aircraft with propeller, airframe weight thereof is slightly larger than buoyancy of floating body and which has mechanism correcting displacement of center of resultant force of lift, thrust and buoyancy and center of gravity
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Airship with blade area variable propeller, ship weight thereof is slightly larger than buoyancy by buoyancy body
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Airship with propeller, weight of body thereof is slightly larger than buoyancy of buoyancy body
