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The most powerful podded thrusters in use are the four 21.5 MW Rolls-Royce Mermaid units fitted to RMS Queen Mary 2. [1] Mechanical azimuth thrusters can be fixed installed, retractable or underwater-mountable. They may have fixed pitch propellers or controllable pitch propellers. Fixed installed thrusters are used for tugboats, ferries and ...
Closeup of one of USCGC Mackinaw's 3.3 MW Azipod units. Azipod is a trademarked azimuth thruster pod design, a marine propulsion unit consisting of a fixed pitch propeller mounted on a steerable gondola ("pod") containing the electric motor driving the propeller, allowing ships to be more maneuverable.
The propulsors are Rolls-Royce Mermaid azimuth thruster type podded propulsion units, [47] [48] each with one forward-facing low-vibration propeller with separately bolted blades. The forward pair of thrusters is fixed, but the aft pair can swivel through 360°, removing the need for a rudder. [16]
Propulsion thrusters are those thrusters which provide longitudinal motion for vessels as an alternative to traditional propellers. There are a variety of types of propulsion thrusters but the most common form is the azimuth thruster, that can rotate 360 degrees on a vertical axis to optionally produce thrust for maneuvering. (Lindborg, 1997).
The ship is powered by a COGES [3] power plant of gas turbines and a steam turbine providing up to 60 megawatts for the electric systems and two 19 MW Rolls-Royce/Alstom MerMaid azimuth thrusters for propulsion. In 2007, an additional diesel engine was fitted as a fuel-saving measure. [4]
She is fitted with two General Electric LM2500+ gas turbines and is fitted with two Rolls-Royce Mermaid azimuthing electric pod propulsion units. These pods proved unreliable early in the ships career, however with upgrades and operational experience they are currently more reliable. [4] She also has three bow thrusters.
The Mistral class is a class of five landing helicopter docks built by France. Also known as helicopter carriers, and referred to as "projection and command ships" (French: bâtiments de projection et de commandement or BPC) and "porte-hélicoptères amphibie" (PHA) since 2019, a Mistral-class ship is capable of transporting and deploying 16 NH90 or Tiger helicopters, four landing craft, up to ...
The Z-drive is so named because of the appearance (in cross section) of the mechanical driveshaft or transmission configuration used to connect the mechanically supplied driving energy to the Z-drive azimuth thruster device. This form of power transmission is called a Z-drive because the rotary motion has to make two right angle turns, thus ...