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The Seattle Cover 3 is a Cover 3 defense crafted by Seattle Seahawks coaches Pete Carroll and Dan Quinn that helped the team reach Super Bowls in 2013 and 2014, winning XLVIII. [1] The defense used a 4-3 base formation while incorporating 3–4 defensive principles using a hybrid defensive end - linebacker position known as the Leo. [ 2 ]
Diagram of the Cover 3 defense. In Cover 3, the two corners and free safety each have responsibility for a deep third of the field, while the strong safety plays like a linebacker. [7] [8] [9] This coverage is generally considered to be a run stopping defense as it focuses on preventing big pass plays and stopping the run while giving up short ...
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Venturi turbines can be used at low heads (1.5–5 metres) and medium to high flows (1m 3 /s–20 m 3 /s). Multiple turbines can be installed in parallel. Archimedes screw: Water is fed into the top of the screw forcing it to rotate. The rotating shaft can then be used to drive an electric generator.
Ullage is also widely used in industrial or marine settings to describe the empty space in large tanks or holds used to store or carry liquids or bulk solids such as grain. [6] In accordance with IMO regulations, the Code of Federal Regulations , and the ABS Rules for Steel Vessels, certain pressurized tanks on steel ships may not be filled ...
Francis type units cover a head range from 40 to 600 m (130 to 2,000 ft), and their connected generator output power varies from just a few kilowatts up to 1000 MW. Large Francis turbines are individually designed for each site to operate with the given water flow and water head at the highest possible efficiency, typically over 90% (to 99% [6]).
The Archimedean screw turbine is applied on rivers with a relatively low head (from 0.1 m to 10 m) and on low flows (0.01 m 3 /s up to around 10 m 3 /s on one turbine). Due to the construction and slow movement of the blades of the turbine, the turbine is considered to be friendly to aquatic wildlife.
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