The invention relates to a Flettner rotary sail (800) capable of turning about a vertical axis, and comprising an aerodynamic surface of rotation extending between a proximal end and a distal end, comprising, between its two ends, a plurality of sections centered on the vertical axis and extending along said axis between two parallel circular hoops, respectively of diameter 2r, and 2r.sub.2, the hoops being spaced apart by a distance 2h along the vertical axis, the shape of the aerodynamic surface of the section being defined by the revolution of a continuous meridian curve comprising, between the two hoops, a groove of radius r.sub.0 less than or equal to r.sub.1 and less than or equal to r2

The invention relates to a Flettner rotary sail (800) capable of turning about a vertical axis, and comprising an aerodynamic surface of rotation extending between a proximal end and a distal end, comprising, between its two ends, a plurality of sections centered on the vertical axis and extending along said axis between two parallel circular hoops, respectively of diameter 2r, and 2r.sub.2, the hoops being spaced apart by a distance 2h along the vertical axis, the shape of the aerodynamic surface of the section being defined by the revolution of a continuous meridian curve comprising, between the two hoops, a groove of radius r.sub.0 less than or equal to r.sub.1 and less than or equal to r2

The invention relates to a Flettner rotary sail (800) capable of turning about a vertical axis, and comprising an aerodynamic surface of rotation extending between a proximal end and a distal end, comprising, between its two ends, a plurality of sections centered on the vertical axis and extending along said axis between two parallel circular hoops, respectively of diameter 2r, and 2r.sub.2, the hoops being spaced apart by a distance 2h along the vertical axis, the shape of the aerodynamic surface of the section being defined by the revolution of a continuous meridian curve comprising, between the two hoops, a groove of radius r.sub.0 less than or equal to r.sub.1 and less than or equal to r2.

The invention relates to a Flettner rotary sail (800) capable of turning about a vertical axis, and comprising an aerodynamic surface of rotation extending between a proximal end and a distal end, comprising, between its two ends, a plurality of sections centered on the vertical axis and extending along said axis between two parallel circular hoops, respectively of diameter 2r, and 2r.sub.2, the hoops being spaced apart by a distance 2h along the vertical axis, the shape of the aerodynamic surface of the section being defined by the revolution of a continuous meridian curve comprising, between the two hoops, a groove of radius r.sub.0 less than or equal to r.sub.1 and less than or equal to r2.

A system for limiting power to a plurality of on-line consumers includes an operating characteristic sensor associated with each of a plurality of prime movers and a controller. The controller is configured to determine a maximum torque capability of each of the plurality of prime movers, determine the available electrical power response of each of the plurality of generators, determine a total available electrical power response, and determine a total maximum power demand. The controller then compares the total available electrical power response to the total maximum power demand, and upon the total maximum power demand exceeding the total available electrical power response, limits power to the plurality of on-line consumers to no more than the total available electrical power response.

A monopod for mounting to the boat seat mount of a marine vessel, such as a bass boat or speed boat, which is capable of providing power for mobile accessories via a second monopod affixed to the navigation light port of the boat. The monopod is extendable to heights up to or exceeding eight feet (8) above the deck of the boat, providing exceptional views for recording with a mounted camera while users participate in sports or other events within the boat. A release mechanism allows one portion of the monopod to telescope away from a second portion, thereby extending the monopod.

A monopod for mounting to the boat seat mount of a marine vessel, such as a bass boat or speed boat, which is capable of providing power for mobile accessories via a second monopod affixed to the navigation light port of the boat. The monopod is extendable to heights up to or exceeding eight feet (8) above the deck of the boat, providing exceptional views for recording with a mounted camera while users participate in sports or other events within the boat. A release mechanism allows one portion of the monopod to telescope away from a second portion, thereby extending the monopod.

A ship having improved power efficiency is provided. The ship comprises: a power grid; a power cost generator which determines the cost of power; a generator which is connected to the power grid and analyzes the cost of power so as to autonomously determine whether to produce power; an energy storage device which is connected to the power grid and analyzes the cost of power so as to autonomously determine whether to store power; and a load which is connected to the power grid and analyzes the cost of power so as to autonomously determine whether to use power.

A ship having improved power efficiency is provided. The ship comprises: a power grid; a power cost generator which determines the cost of power; a generator which is connected to the power grid and analyzes the cost of power so as to autonomously determine whether to produce power; an energy storage device which is connected to the power grid and analyzes the cost of power so as to autonomously determine whether to store power; and a load which is connected to the power grid and analyzes the cost of power so as to autonomously determine whether to use power.

The present invention generally provides a portable power box for mounting a monopod. The box includes a navigation light power port typical of a marine vessel, such as a bass boat or speed boat. The monopod can then provide power for mobile accessories, such as cameras and smart phones. The monopod may be fitted with extendable, bendable arms for mounting additional cameras or other electronic devices or for providing additional accessories. The box could also include other power outlets, including universal serial bus (USB) or standard power outlet ports.