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transport: Railway turntable

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When operated as part of a multiple unit locomotive consist, the locomotives can be arranged so that the consist can be operated "front end first" no matter which direction the consist is pointed.
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A railway turntable or wheelhouse is a rotating platform for turning railway rolling stock, usually locomotives, to face a different direction. It is especially used in areas where economic considerations or a lack of sufficient space have served to weigh against the construction of a turnaround wye. Railways needed a way to turn steam locomotives around for return journeys, as their controls were often not configured for extended periods of running in reverse; also many locomotives had a lower top speed in reverse. Most diesel locomotives, however, can be operated in either direction, and are considered to have "front ends" and "rear ends" (often determined by reference to the location of the crew cab). When a diesel locomotive is operated as a single unit, the railway company often prefers, or requires, that it be run "front end" first. When operated as part of a multiple unit locomotive consist, the locomotives can be arranged so that the consist can be operated "front end first" no matter which direction the consist is pointed. Turntables were also used to turn observation cars so that their windowed lounge ends faced toward the rear of the train. Some early turntables rapidly became too small for their purpose as longer locomotives were introduced.
Kategoria: transport
Rodzina: kosmos
Jakość źródła: 65/100
Próby weryfikacji: 3
Notatka fact-checku: Fact-check 3.0-content-aware: no sufficient claim-bound corroboration after 3 healthy attempts. Scope=verify the factual claim. Required independent sources=2; stored evidence groups=0. Provider/API errors did not consume attempts. | Fact-check 4.3.2: research wznowiony bez zdejmowania HOLD. Poprzednia metoda: factcheck-300-content-aware. | Fact-check 4.3.2: research wznowiony bez zdejmowania HOLD. Poprzednia metoda: factcheck-weekly-research-432.

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Wikipedia ENpomocnicze

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A Garratt locomotive is a type of three-part articulated steam locomotive invented by the engineer Herbert William Garratt. Its boiler, firebox, and cab are mounted on a centre frame or "bridge". The two other parts, one at each end, have a pivot to support the central frame; they consist of a steam engine unit – with driving wheels, trailing wheels, valve gear, and cylinders, and above it, fuel and/or water storage. Articulation permits locomotives to negotiate curves that might restrict large rigid-framed locomotives. The design also provides more driving wheels per unit of locomotive weight, permitting operation on lightly engineered track. Garratt locomotives produced as much as twice t…

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American Society of Mechanical Engineerspomocniczeniezależne

Evidence: 45 • authority: 88

Locomotive Assignment Under Consist Busting and Maintenance Constraints. We propose a new optimization model with column generation (CG) decomposition for the locomotive assignment problem (LAP). Although several algorithms have been developed for LAP, including exact mathematics models, approximate dynamic programming and heuristics, previously published optimization algorithms all suffer from scalability or solution accuracy issues. In addition, each of the optimization models lacks part of the constraints that are necessary in real-world train/locomotive assignments, e.g., maintenance shop constraints or consist-busting avoidance. We propose a train string based LAP model, which includes…

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Publishing Societypomocniczeniezależne

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Future purchase analysis - technical compare and fund needed for commercial use of the consist, for COASTER line – classic locomotive and wagons versus Diesel Multiple Unit (DMU)

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Wikipedia ENpomocnicze

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Norfolk and Western 611, also known as the "Spirit of Roanoke" and the "Queen of Steam", is the only surviving example of Norfolk and Western's (N&W) class J 4-8-4 type "Northern" streamlined steam locomotives. Built in May 1950 at N&W's Roanoke (East End) Shops in Roanoke, Virginia, it was the twelfth member of its class and was also one of the last mainline passenger steam locomotives built in the United States, representing a pinnacle of American steam locomotive technology. No. 611 hauled N&W's premier passenger trains between Norfolk, Virginia, and Cincinnati, Ohio; and ferried Southern Railway's (SOU) passenger trains through the Blue Ridge Mountains between Monroe and Bristol, Virgin…

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Wikipediapomocnicze

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