Dimensions for an Aggregate Hopper
I plan to have a quarry on the layout and want to run Ortner-style aggregate hoppers in sand & gravel service. Ortners are available in HO (my scale) but they're running about $30 a piece! Considering even a modest quarry will produce more than one car of stone in a day's work, I'll need a small fleet and buying even a handful of these will be way out of my budget. After seeing so many amazing scratchbuilt pieces, I've decided to take a crack at it myself and have selected two prototype models to base my model on.
At first I went to Trinity Railcar's website but there were no dimensions available for their RDL-A (although some forums indicated they once did provide this) so I sent in a request through their e-mail system and I'm waiting for a reply. Since they bought out Ortner back in the '80s, I figured this was the best place to start and I would probably choose the old Ortner design over the modern as this would best fit my fictional shortline.
I was able to locate dimensions for an American Railcar Industries 2400 cu.ft. Bottom Discharge Aggregate Hopper on their website and have been studying the diagram to get an idea of where to start; however, there are several terms that are new to me:
- Width Over Top of Chords ----- 10' 7 1/2"
- Height to Top of Top Chord ---- 13'3"
The following, I'm assuming, have to do with the individual bays but I'm not sure:
- End Floor Slope ---- 55 degrees
- Intermediate Floor Slope ---- 55 degrees
- Longitudinal Hood Slope ---- 60 degrees
Could someone shed some light on what these terms mean? This is a big undertaking for me as I consider myself a beginner with very little experience scratch building anything but, hey, we all had to start somewhere, right?
Also, if any scratchbuilders would be willing to share some advice on someone starting out on a project, please, feel free to offer your wisdom - it will be received with much appreciation!
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