as the question says lol, i have nooo idea
it is a modified hopper normally with a square type bay unloader which dumps the ballast onto the tracks.
some pics of ATSF ones here www.atsf.nl
so it carries ballast? rocks?
sure does, normally you see them in work trains it’s what they use to dump ballast on the tracks
OOPS! [:I] posted twice … can’t recall password… as usual[8)]
They are frequently old hopper cars from revenue service that have been cascaded to MoW (Maintenance of Way) service and altered from the usual hopper outlets to side discharge outlets (often the small square ones mentioned above). A very few were converted from covered hoppers with some of the roof left in place - usually the two end panels. There are also a (relatively) few purpose built cars that can centre drop as well as side drop.
Walthers do the former and (I think) Atlas do the latter. Roundhouse did some converted Offset Side Hoppers with long unloading doors to side discharge.
Ballast Hoppers of this kind are often marked with a load limit line for stone and sometimes have holes about 6"x2" cut along above this line to make it obvious from trackside when they are loaded to the limit. This is because stone is heavier than coal and a full stone load by volume would be far too heavy by weight.
Ballast cars tend to run in strings from the supplying quarry to the site of track maintenance. Small amounts of top-up ballast tend to travel by Gondola… but there are always exceptions to any rule.
Aggregates and building/concrete ballast would normally be loaded in conventional hoppers… with the same load restrictions. Sand in the US tends to go by covered hopper as far as I can make out… presumiably because of too much spillage over distance.
The only other regular side drop hopper cars that I know of were coke cars. I have “aquired” a cascaded coke car as the ballast car for my (fictitious) shortline.
Sand and aggregates from quarry also tended to use cascaded ore cars… loaded nearer to full because ore is of similar weight/density. I’ve not seen pics of taconite cars in this service… probably didn’t get cascaded so soon.
Roundhouse also do/did a centre discharge sand hopper of ancient looking design. these weren’t used for MoW ballast that I know of… but my shortline has them too…
Rock
The Atlas Hart ballast hoppers are the best models of this type of car on the market.
The prototypes were purpose-built for the service. A wide range of railroads
bought and operated them.
A ballast hopper is another term for a Texas toad. They can be seen frequently in San Antonio hopping along the ballast on railroads… [:)]
Ever seen the track CRAWLING with toads (Double stacked)? It’s really weird!
Atlas recently released in HO. Here are two of them for the Katy.
Regards,