The present innovation relates generally to propulsion mechanisms for propeller-driven vehicles and vessels, and, more particularly, to gear-driven transmissions for airboats.

A watershed autonomous robotic data recorder maps subsurface topography and obtains water quality data for bodies of water. The device is capable of fully autonomous, manual, or hybrid navigation and includes a modular hull design which enables customization to accommodate both large and small bodies of water. A tangle-proof propulsion system is provided, to propel the hull(s). A deployable sensor pod includes a water sensor for determining if the sensor pod is in water, a pressure sensor for determining depth of the sensor pod, and a plurality of sensors for measuring water conditions. An onboard controller operates a winch that raises and lowers the sensor pod while the controller and a GPS receiver log positions of the sensor pod. This three-dimensional environmental, physical and chemical water quality attribute data collection creates a digital twin of the body of water to establish a common data environment for water modeling and analysis.

A watershed autonomous robotic data recorder maps subsurface topography and obtains water quality data for bodies of water. The device is capable of fully autonomous, manual, or hybrid navigation and includes a modular hull design which enables customization to accommodate both large and small bodies of water. A tangle-proof propulsion system is provided, to propel the hull(s). A deployable sensor pod includes a water sensor for determining if the sensor pod is in water, a pressure sensor for determining depth of the sensor pod, and a plurality of sensors for measuring water conditions. An onboard controller operates a winch that raises and lowers the sensor pod while the controller and a GPS receiver log positions of the sensor pod. This three-dimensional environmental, physical and chemical water quality attribute data collection creates a digital twin of the body of water to establish a common data environment for water modeling and analysis.

A thrust generating apparatus for controlling an attitude of a movable body includes an outer shell body, a first inner shell body and a second inner shell body, a first fan rotating body and a second fan rotating body, an intermediate shell body, and a driving unit. A outer surface of the intermediate shell body has a shape such that an air flow sent from an opening end inside of any one of the first inner shell body and the second inner shell body is accommodated and flowed out to an outer flow path . When the first fan rotating body is rotated, the air flow suctioned from the outside in the axial direction of the first inner shell body passes through the outer flow path defined by the second inner shell body to be jetted from a second opening end of the outer shell body.

A thrust generating apparatus for controlling an attitude of a movable body includes an outer shell body, a first inner shell body and a second inner shell body, a first fan rotating body and a second fan rotating body, an intermediate shell body, and a driving unit. A outer surface of the intermediate shell body has a shape such that an air flow sent from an opening end inside of any one of the first inner shell body and the second inner shell body is accommodated and flowed out to an outer flow path . When the first fan rotating body is rotated, the air flow suctioned from the outside in the axial direction of the first inner shell body passes through the outer flow path defined by the second inner shell body to be jetted from a second opening end of the outer shell body.

A transmission (14) for connecting a propeller (15) to an engine (13) having a drive shaft (2), comprising: a first gear (3) driven by the drive shaft (2) in a first rotational direction; an idler gear (4) driven by the first gear; a third gear (5) driven by the idler gear (4); and an output shaft (6) driven by the third gear in the first rotational direction.

A transmission (14) for connecting a propeller (15) to an engine (13) having a drive shaft (2), comprising: a first gear (3) driven by the drive shaft (2) in a first rotational direction; an idler gear (4) driven by the first gear; a third gear (5) driven by the idler gear (4); and an output shaft (6) driven by the third gear in the first rotational direction.

A device for use on water, the device including a hull having a substantially planar base and a propulsion system configured to propel the device in any direction across a plane substantially parallel to the base, where the propulsion system is located above the water, in use.

It is an object of the present invention to provide a horizontal shaft rotor with low power and high rotation efficiency by achieving that a high-speed flow according to the Coanda effect caused by rotating the blade rather than pushing out the fluid with the blade flows to the back face direction and propulsive force is obtained as a reaction.

A horizontal shaft rotor comprising a lift-type blade, wherein, in the lift-type blade 1, a front face 3D in a flow receiving direction is a large arcuate bulging face in a string direction, a rear face 3E in a discharge direction is made smaller than the bulge of the front face 3D, so that, when the blade rotates, a high speed flow passing along the string direction of the front face from the rear edge portion 3G to the back face 3E direction generates propulsive force.

It is an object of the present invention to provide a horizontal shaft rotor with low power and high rotation efficiency by achieving that a high-speed flow according to the Coanda effect caused by rotating the blade rather than pushing out the fluid with the blade flows to the back face direction and propulsive force is obtained as a reaction.

A horizontal shaft rotor comprising a lift-type blade, wherein, in the lift-type blade 1, a front face 3D in a flow receiving direction is a large arcuate bulging face in a string direction, a rear face 3E in a discharge direction is made smaller than the bulge of the front face 3D, so that, when the blade rotates, a high speed flow passing along the string direction of the front face from the rear edge portion 3G to the back face 3E direction generates propulsive force.