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BigMoon Power is a Canadian company founded in 2015 developing a floating tidal stream generator. [20] The concept is designed to be simple, with an optimised waterwheel (called a Kinetic Keel) mounted between two hulls of a barge, moored by foundations build from old train cars filled with concrete.
A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
The purpose of sails is to use wind energy to propel the vessel, sled, board, vehicle or rotor. Depending on the angle of your sail it will be the difference in direction of where your boat is heading and where the wind is going. [31] Dacron was used a lot as a material for sails because of its strong, durable, and easy to maintain.
USS Artisan with USS Antelope (IX-109) and LST-120 in the dock at Espiritu Santo, New Hebrides Islands, 8 January 1945 Los Alamos (AFDB-7), with a repaired submarine at Holy Loch, Scotland in 1985 YFD-2 The first Yard Floating Dock built in 1901, arriving Pearl Harbor 23 October 1940 from New Orleans Naval Yard USS Pennsylvania in drydock USS Dewey, the second YFD, c. 1906–1907
Diagram contrasting course made good to windward by tacking a schooner versus a square-rigged ship. Sailing vessels cannot sail directly into the wind. Instead, square-riggers must sail a course that is between 60° and 70° away from the wind direction [76] and fore-and aft vessels can typically sail no closer than 45°. [77]
Wind-assisted propulsion is the practice of decreasing the fuel consumption of a merchant vessel through the use of sails or some other wind capture device. Sails used to be the primary means of propelling ships , but with the advent of the steam engine and the diesel engine , sails came to be used for recreational sailing only.
A nacelle / n ə ˈ s ɛ l / is a cover housing that houses all of the generating components in a wind turbine, including the generator, gearbox, drive train, and brake assembly. [1]
A wind rose is a diagram used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location. Historically, wind roses were predecessors of the compass rose (also known as a wind rose), found on nautical charts , as there was no differentiation between a cardinal direction and the ...