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Turbo-electric
A turbo-electric transmission uses electric generators to convert the mechanical energy of a turbine (steam or gas) into electric energy, which then powers electric motors and converts back into mechanical energy that power the driveshafts. Turbo-electric drives are used in some rail locomotives (gas turbines, ''e.g.'' with the first TGV) and ships (steam and more recently gas turbines). An advantage of turbo-electric transmission is that it allows the adaptation of high-speed turbines to slow turning propellers or wheels without a heavy and complex gearbox. It has the advantage of being able to provide electricity for the ship or train's other electrical systems, such as lighting, computers, radar, and communications equipment. Other advantages for ships include greater watertight subdivision, quieter operations, and safety (via instant thrust reversal by changing engine direct current polarity) for submarines.Friedman, 1994, pp 136, 147–149 Ships with turbo-electric drive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Turbine
A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884. Fabrication of a modern steam turbine involves advanced metalwork to form high-grade steel alloys into precision parts using technologies that first became available in the 20th century; continued advances in durability and efficiency of steam turbines remains central to the energy economics of the 21st century. The steam turbine is a form of heat engine that derives much of its improvement in thermodynamic efficiency from the use of multiple stages in the expansion of the steam, which results in a closer approach to the ideal reversible expansion process. Because the turbine generates rotary motion, it can be coupled to a generator to harness its motion into electricity. Such turbogenerators are the core of thermal power stations which can be fueled by fossil-fuels, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Langley (CV-1)
USS ''Langley'' (CV-1/AV-3) was the United States Navy's first aircraft carrier, converted in 1920 from the collier USS ''Jupiter'' (Navy Fleet Collier No. 3), and also the US Navy's first turbo-electric-powered ship. Conversion of another collier was planned but canceled when the Washington Naval Treaty required the cancellation of the partially built s '' Lexington'' and '' Saratoga'', freeing up their hulls for conversion to the aircraft carriers and . ''Langley'' was named after Samuel Langley, an American aviation pioneer. Following another conversion to a seaplane tender, ''Langley'' fought in World War II. On 27 February 1942, while ferrying a cargo of USAAF P-40s to Java, she was attacked by nine twin-engine Japanese bombers of the Japanese 21st and 23rd naval air flotillas and so badly damaged that she had to be scuttled by her escorts. Construction President William H. Taft attended the ceremony when ''Jupiter''s keel was laid down on 18 October 1911, at the Mare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SS Normandie
The SS ''Normandie'' was a French ocean liner built in Saint-Nazaire, France, for the French Line ''Compagnie Générale Transatlantique'' (CGT). She entered service in 1935 as the largest and fastest passenger ship afloat, transatlantic crossing, crossing the Atlantic in a record 4.14 days, and remains the most powerful steam Turbo-electric transmission, turbo-electric-propelled passenger ship ever built. ''Normandie''s novel design and lavish interiors led many to consider her the greatest of ocean liners,''Floating Palaces.'' (1996) A&E. TV Documentary. Narrated by Fritz Weaver and she would go on to heavily influence the French arm of the Streamline Moderne design movement (called the ''style paquebot'', or "ocean liner style"). Despite this, she was not a commercial success and relied partly on government subsidy to operate. During service as the flagship of the CGT, she made 139 westbound transatlantic crossings from her home port of Le Havre to New York City. ''Normandie' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Tullibee (SSN-597)
USS ''Tullibee'' (SSN-597), a unique submarine, was the second ship of the United States Navy to be named for the tullibee, any of several whitefishes of central and northern North America. At 273 feet long and 2,640 tons displacement, USS ''Tullibee'' was the smallest nuclear-powered attack submarine in the US submarine fleet, although she was originally designed mainly for the anti-submarine (ASW) 'hunter-killer' role and was redesignated an attack submarine when the two roles were merged. The initial manning complement was 7 officers and 60 enlisted men. However before inactivation, the crew included 13 officers and over 100 enlisted men. During her career, ''Tullibee'' achieved much and conducted many submarine firsts. During her commissioned service she submerged and surfaced 730 times and traveled approximately equal to the distance from the earth to the moon and halfway back. Construction ''Tullibee'' was the result of Project Nobska, a study ordered in 1956 by Admira ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbine
A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating electrical power when combined with a generator.Munson, Bruce Roy, T. H. Okiishi, and Wade W. Huebsch. "Turbomachines." Fundamentals of Fluid Mechanics. 6th ed. Hoboken, NJ: J. Wiley & Sons, 2009. Print. A turbine is a turbomachine with at least one moving part called a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades so that they move and impart rotational energy to the rotor. Early turbine examples are windmills and waterwheels. Gas, steam, and water turbines have a casing around the blades that contains and controls the working fluid. Credit for invention of the steam turbine is given both to Anglo-Irish engineer Sir Charles Parsons (1854–1931) for invention of the reaction turbine, and to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SS Yorktown (1894)
SS ''Yorktown'' was launched February 10, 1894, by Delaware River Iron Ship Building and Engine Works, Chester, Pennsylvania for the Old Dominion Steamship Company for the company's overnight New York City/Norfolk, Virginia service. The United States Navy purchased ''Yorktown'' on April 21, 1898, to be commissioned as the second USS ''Resolute'', an auxiliary cruiser and transport that saw naval service during the Spanish–American War 1898–1899. The United States Department of War acquired the ship on January 22, 1900, for service as the United States Army Transport (USAT) ''Rawlings''. The ship was sold to the Merchants and Miners Transportation Company of Baltimore, Maryland on July 27, 1901, and renamed ''Powhatan''. ''Powhatan'' was wrecked in 1916 and in 1919 rebuilt as the world's first turbo-electric propelled passenger ship ''Cuba'' for luxury passenger and express freight service between Florida and Cuba with the Miami Steamship Company beginning service in 1920. Rena ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission (mechanics)
Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differential, and final drive shafts. In the United States the term is sometimes used in casual speech to refer more specifically to the gearbox alone, and detailed usage differs. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are also used on pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted. Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as the speed varies. This switching may be done manually (by the operator) or automatically (by a control unit). Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Union Rotoiti
''Union Rotoiti'' was a large roll-on/roll-off vessel operated on the trans Tasman route by the Union Steam Ship Company of New Zealand (USSCo.). Along with her sister ship ''Union Rotorua'', she was unusual in that she originally had turbo-electric transmission. Construction ''Union Rotoiti'' was built by Broken Hill Pty (BHP) at the Whyalla Steelworks in South Australia. She was completed on 22 June 1977. Delivery was delayed by a year and costs went over budget by $8 million dollars bringing the total cost to $30 million dollars. It was subsequently acknowledged that ''Rotoiti'' and her sister ship ''Rotorua'' could have been built for half the price if they had been built outside Australia. ''Union Rotoiti'' was unusual in that she was powered by gas turbine. The ship's main gas turbine / electric machinery consisted of a single General Electric MM5262RB gas turbine operating on a regenerative cycle. This was coupled to an AC generator to provide a maximum designed continuou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Union Rotorua
''Union Rotorua'' was a large ro-ro vessel operated on the trans Tasman route by the Union Steam Ship Company of New Zealand (USSCo). Along with her sister ship ''Union Rotoiti'', she was unusual in that she originally had turbo-electric transmission. Construction ''Union Rotorua'' was built by Broken Hill Pty (BHP) at the Whyalla Steelworks in South Australia. She was launched on 19 January 1976. Delivery was delayed by a year and costs went over-budget by $8 million bringing the total cost to $30 million. It was subsequently acknowledged that ''Rotoiti'' and her sister ship ''Rotorua'' could have been built for half the price if they had been built outside Australia. ''Union Rotorua'' was unusual in that she was powered by gas turbine. The ship's main gas turbine / electric machinery consisted of a single General Electric MM5262RB gas turbine operating on a regenerative cycle. This was coupled to an AC generator to provide a maximum designed continuous rating of 18822 kW ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolls-Royce Plc
Rolls-Royce Holdings plc is a British multinational aerospace and defence company incorporated in February 2011. The company owns Rolls-Royce, a business established in 1904 which today designs, manufactures and distributes power systems for aviation and other industries. Rolls-Royce is the world's second-largest maker of aircraft engines (after General Electric) and has major businesses in the marine propulsion and energy sectors. Rolls-Royce was the world's 16th largest defence contractor in 2018 when measured by defence revenues. Rolls-Royce Holdings plc is listed on the London Stock Exchange, where it is a constituent of the FTSE 100 Index. At the close of London trading on 28 August 2019, the company had a market capitalisation of £4.656bn, the 85th-largest of any company with a primary listing on the London Stock Exchange. The company's registered office is at Kings Place, near Kings Cross in London. History Ownership Rolls-Royce grew from the engineering business ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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