Queen Mary 2
Queen Mary 2
Queen Mary 2 was intended for some crossings of the Atlantic Ocean; the final construction cost was approximately $300,000 per berth. The cost was increased by the high quality of materials; having been designed as an ocean liner, 40% more steel was required for a cruise liner than for a standard cruise ship. Queen Mary 2 has a maximum speed of just over 30 knots) (56 km/h; 35 mph) and a cruising speed of 26 knots (48 km/h; 30 mph), which is faster than a contemporary cruise ship. Instead of the common diesel-electric configuration, Queen Mary 2 uses integrated electric propulsion to achieve her top speed. Diesel engines, augmented by gas turbines, are used to generate electricity for electric motors for propulsion and for on-board use.
Characteristics
Queen Mary 2 is not a steamship like many of her predecessors, but is powered primarily by four diesel engines, with two additional gas turbines providing extra power when required; this integrated electric propulsion configuration is used to produce the power to drive her four electric propulsion pods as well as the ship's hotel services. The spaces for these prime movers are also split, and controls are also backed up, with the intention of preventing a single failure from disabling the ship.
Design and construction
!Queen Mary 2 under construction, her [radar mast) in the right foreground](//upload.wikimedia.org/wikipedia/en/thumb/b/b6/QM2-1.jpg/250px-QM2-1.jpg)
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