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Rotary Railcar Dumper at 45-Degree Rotation. A rotary car dumper or wagon tippler (UK) is a mechanism used for unloading certain railroad cars such as hopper cars, gondolas or mine cars (tipplers, UK). It holds the rail car to a section of track and then rotates the track and car together to dump out the contents.
After the 1967 SCL merger, these cars were fitted with rotary couplers and used in Bone Valley phosphate service. The word "hopper", meaning a "container with a narrow opening at bottom", goes back to the thirteenth century, [ 7 ] and is found in Chaucer 's story " The Reeve's Tale " (written late fourteenth century) in reference to a machine ...
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
A railroad car, railcar (American and Canadian English), [a] railway wagon, railway carriage, railway truck, railwagon, railcarriage or railtruck (British English and UIC), also called a train car, train wagon, train carriage or train truck, is a vehicle used for the carrying of cargo or passengers on a rail transport network (a railroad/railway).
Outside North America some rail routes have been built or upgraded to such standards as to allow both electrification with overhead wires and double stacking. [6] [7] CSX lists three clearance heights above top of rail for double stack service: [8] Doublestack 1 — 18 ft 2 in (5.54 m) [8] Doublestack 2 — 19 ft 2 in (5.84 m) [8]
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Each unit of a double-stack car contains a single well; they often are constructed with three to five cars connected by articulated connectors. The intermediate connectors are supported by the centerplate of single trucks, often a 125-short-ton (112-long-ton; 113 t)-capacity truck but sometimes a 150-short-ton (134-long-ton; 136 t)-capacity one.
In Japan, trends towards adding rail freight shipping are more due to availability of workers rather than other concerns. [citation needed] Rail freight tonnage as a percent of total moved by country: Russia: about 12% in 2016 [23] up 11%; Japan: 5% in 2017 [24] Rail freight ton-milage as a percent of total moved by country: USA: 27.4% in 2020 [25]