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These early cars were volume-limited for less dense commodities like grain or sugar, so later designs include longer covered hopper cars with higher sides and three or more bottom bays. [9] Increasing axle load limits have allowed some of the heavier loads formerly assigned to two-bay hoppers to be assigned to larger, more efficient three-bay ...
The excess height section of the car end is often painted with a white band to be easily visible if wrongly assigned to a low-clearance line. [ 7 ] The internal height of the 86-foot (26.21 m) hicube boxcars originally used in automotive parts service was generally 12 feet 9 inches (3.89 m).
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By mid-century, under the leadership of Richard L. Duchossois, the company focused on building specialized freight cars, such as high-cube boxcars for auto parts, all-door boxcars for building products, gondolas, rotary-dump gondolas for coal, bulkhead flatcars and centerbeam flatcars for lumber, double-stack container cars, covered hoppers ...
In 1969, the Northern Pacific Railroad ordered a number of modified covered hopper cars from American Car and Foundry for transporting perishable food in bulk. The 55-foot (16.76 m)-long cars were blanketed with a layer of insulation, equipped with roof hatches for loading, and had centerflow openings along the bottom for fast discharge.
These were small hopper cars that carried the product on a mine railway out of the mine. When a mine car entered the upper level of the tipple, its contents were dumped through a chute leading to a railroad hopper car positioned on a track running beneath the tipple. At some facilities, each car was tipped over manually—thus the name, "tipple".
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. Used with gondola cars, it is making open hopper cars obsolete.
AITX leases and manages over 16,000 tanks and covered hopper cars serving the petroleum, chemical, food, agriculture, fertilizer and plastic pellet markets. The tank cars are used for a variety of liquid and liquified gas commodities such as vegetable oils, asphalt, various chemicals, LPGs and petroleum products.