Hopper car: An open-top car for hauling items that don't need protection, such as coal and gravel. Unloaded through doors in funnel-like bins in bottom of car.
Hopper cars carry loose freight, such as coal, gravel, sand, concrete and grain. Products that are not harmed by weather are carried in open hoppers. Other products, like wheat, corn and concrete, are shipped in covered hoppers.
Hopper car
An open top car with funnel like bins and unloading doors or gates in bottom of car. Covered hoppers have roofs to loads that need protection from weather.
Hostler ...
Hopper car Open top car, tall sides. Coal and gravel, emptied through chutes at the base.
Hopper car used to carry bulk commodities, such as grain, that must be protected from the weather and/or contamination. Loaded through roof hatches, unloaded through bottom-opening doors. May have flat or rounded sides.
Covered wagon ...
Hopper car
Freight car with its floor sloping to one or more doors designed for unloading the contents (such as coal or ore) by gravity
Horsepower (HP) ...
A hopper car with a permanent roof, roof hatches and bottom openings for unloading. Used for carrying cement and other bulk commodities.
CP
See Constructive Placement or Controlled Point.
A hopper car is a type of railroad freight car used to transport loose bulk commodities such as coal, ore, grain, track ballast, and the like.
Ordinary hopper cars made unsatisfactory ballast cars because it was difficult to control the unloading process. Eventually special ballast doors, which could be retrofitted to hopper cars, were invented to control the rate and location of the flow.
In the 1890s, the typical coal car was either a hopper-bottom gondola (flat floors over the trucks) or full-blown hopper cars with sloping floors and horizontal drop doors under the center sill.
" Yes, it is and the real thing is much bigger, but it succeeds in making the hopper cars look right in relation to the building. And then there were the vent pipes on the roof. They turned out to be simplicity itself. I simply took...
Unit Train - A freight train consisting of one type of freight car, usually hopper cars for carrying coal or grain. Unit trains are seldom, broken up, and tend to operate continuously from loading to unloading point.
I have also found that hopper car bolsters are not square and level, requiring some carving around the pivot to level the truck.
 See also: Train, Car, Track, Standard, Point
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