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Bachmann - 17155 - Tank Car, Triple Dome, 40 Foot - Carbide and Carbon Chemicals - 307

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N Scale - Bachmann - 17155 - Tank Car, Triple Dome, 40 Foot - Carbide and Carbon Chemicals - 307 Image Courtesy of Bachmann Trains
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Stock Number17155
Original Retail Price$29.00
BrandBachmann
ManufacturerBachmann
Body StyleBachmann Tank Car 3-Dome (2012)
Image Provider's WebsiteLink
Prototype VehicleTank Car, Triple Dome, 40 Foot (Details)
Road or Company NameCarbide and Carbon Chemicals (Details)
Reporting MarksCCBX
Road or Reporting Number307
Paint Color(s)White and Black
Print Color(s)Black
Coupler TypeE-Z Mate Mark II Magnetic Knuckle
Wheel TypeChemically Blackened Metal
Wheel ProfileSmall Flange (Low Profile)
Item CategoryRolling Stock (Freight)
Model TypeTank Car
Model Subtype3-Dome
Model VarietyACF
Prototype RegionNorth America
Prototype EraNA Era II: Late Steam (1901 - 1938)
Scale1/160
Track GaugeN standard



Model Information: This model was first released in 2012 and is a completely new tooling. It replaced the earlier Bachmann 3-Dome tank car which dated back to the 1960s. The new ones can be distinguished most easily by the presence of pressure release valves on the sides of each of the three domes. This newer version also sport blackened metal wheels and EZ-Mate II knuckle couplers.
Prototype History:
Triple Dome tank cars, while not as common as single-domes, are a railroad staple. They have been around since the first half of the 20th century.

The dome above tank cars serves as an expansion chamber as temperature affects the volume of any liquids contained within. With no dome, if the liquid did not 100% fill the tank, then it is possible for the liquid to slosh around inside the tank, causing instability and increasing the possibility of a derailment. The dome allows the tank to be slightly overfilled so that should the volume in the main section decrease due to colder temperatures or even a small leak, that there will still be sufficient liquid within to prevent sloshing. Similarly if temperature increases, the liquid can rise up inside the dome preventing excess pressure within the tank. While not as serious as an underfilled tank, an over-pressurized tank might present problems during unloading.

If you see three domes on a tank car it is because there are three separate compartments inside the tank car each containing a different liquid. This was desirable for many reasons.

Often times a delivery would consist of much less than a carload (LCL) of liquid. Remember the sloshing problem? So if you only had to fill a third of a tank with your commodity, then you can avoid the issue by using one of the three chambers within the tank car. Also, you might have several grades of a commodity to deliver such as unleaded, leaded and diesel fuel and you need them to be kept separate. Or you might be producing wine and you want your white wine kept separate from your red wine. Or maybe all three chambers had the same contents but were being delivered to three different customers. It can be very difficult to determine when one third of a single dome tank car has been discharged...

For all these reasons, three-dome tank cars were a common sight in the first half of the 20th century. However, with the rise of the interstate highway system and the modern trucking industry, LCL deliveries have primarily been accomplished with tanker trucks instead of tank cars and the three-dome tank car has gradually disappeared from the North American rail network.
Brand/Importer Information:
Bachmann Industries (Bachmann Brothers, Inc.) is a Bermuda registered Chinese owned company, globally headquartered in Hong Kong; specializing in model railroading.

Founded in Philadelphia, Pennsylvania, the home of its North American headquarters, Bachmann is today part of the Kader group, who model products are made at a Chinese Government joint-venture plant in Dongguan, China. Bachmann's brand is the largest seller, in terms of volume, of model trains in the world. Bachmann primarily specializes in entry level train sets, and premium offerings in many scales. The Spectrum line is the high quality, model railroad product line, offered in N, HO, Large Scale, On30, and Williams O gauge all aimed for the hobbyist market. Bachmann is the producer of the famous railroad village product line known as "Plasticville." The turnover for Bachmann model trains for the year ended 31 December 2006 was approximately $46.87 million, a slight increase of 3.36% as compared to 2005.
Item created by: gdm on 2016-12-04 20:47:58. Last edited by gdm on 2021-02-25 12:20:08

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