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The tank car was relatively uncommon until the 1870s, when the nascent petroleum industry ordered large quantities of metal tanks carried on wooden car bodies. By the early 1900s, a standard design had evolved that lasted throughout the steam and early diesel eras: an 8,000-11,000 gallon metal tank perched on a metal flatcar-like underframe.

The one big change during that time was the transition from riveted to welded construction, beginning in the late 1930s. Car builders introduced X-ray inspection of welds to ensure safety, as well as giant annealing ovens that could heat-treat assembled tanks to relieve joint stress. Welded tanks were stronger, less susceptible to rust and corrosion, and less likely to rupture in the event of a wreck.

At the same time as steam engines were disappearing, another innovation completely changed the appearance of tank cars. Beginning in the mid-1950s, a new design took hold: the tank itself became the structural backbone of the car, eliminating the need for a full-length underframe and making bigger tank diameters possible. Stub sills under each end provided a place to mount trucks and couplers.

The prototype for this car was one of the largest tank cars in regular service, a pressurized 33,000 gallon car used for transporting liquefied petroleum gas, a byproduct of oil refining used for home and industrial heating. Another common payload for these cars was anhydrous ammonia, a highly concentrated fertilizer.

The first of these cars was built for Shippers car Line (SHPX) in 1962 by American Car and Foundry (ACF). To provide maximum capacity within the allowed loading gauge (outside dimensions), it featured a dual-diameter tank, with a smaller diameter over the stub end sills and a larger diameter between the sills — giving rise to the nickname "whalebelly." Cars of this type were built throughout the 1960s and initially decorated in flamboyant paint schemes — until public concerns about the safety of flammable cargos led owners and lessees to opt for more subdued decoration. In the 1970s, however, the whalebelly design was largely replaced by single-diameter cars of the same capacity. Many original whalebellies served into the first decade of this century, until the end of their allowed 40-year service life.

High quality, traditionally sized RailKing Freight Cars provide detailed bodies and colorful paint schemes for the O Gauge railroader. MTH makes an enormous variety of RailKing Freight Cars, including many different car types and roadnames. No matter what era or part of the country you are modeling, RailKing is sure to have something for you.


Unlike equipment that carried a variety of loads, like boxcars, flatcars, and gondolas, this 3-bay hopper was designed specifically for one cargo: bituminous coal. Its capacity matched the volume of coal that a pair of typical 70-ton freight trucks could carry. And its slope sheets — the angled floors at either end of the car — were set at precisely the angle at which coal would flow easily from its bottom doors. (Covered grain hoppers, for example, require much steeper slope sheets.)

The large 3-bay car was ideal for delivery of bituminous coal to large industrial customers and railroads. In contrast, cleaner-burning anthracite coal, shipped more commonly to small, local coal dealers who served the home heating market, often traveled in smaller 2-bay hoppers.

MTH Premier O Scale freight cars are the perfect complement to any manufacturer's scale proportioned O Gauge locomotives. Whether you prefer to purchase cars separately or assemble a unit train, MTH Premier Rolling Stock has the cars for you in a variety of car types and paint schemes.

Virtually every sturdy car is offered in two car numbers which makes it even easier than ever to combine them into a multi-car consist. Many of MTH's Premier Rolling Stock offerings can also operate on the tightest O Gauge curves giving them even more added versatility to your layout.

2018 Volume 2 Catalog

Click HERE to see it online.


It's Easy To Add WiFi To Your DCS Layout

Check Out The Quick Start Video

Click HERE To Learn More About DCS and WiFi Control


M.T.H. Electric Trains is releasing a limited run of smartphone cases for popular iPhone and Samsung Galaxy models this Fall. Club Members save $5.00 off the regular suggested retail of $15.99 each.

These durably constructed cases feature a reinforced corner design for drop protection. Its flexible sides, knurled grip, and integrated buttons provide you with an elevated, rugged look while providing complete protection for your device.

Click HERE to learn more. Don't miss this opportunity to show off your M.T.H. pride. To order your case today, call the M.T.H. Sales Department at 410-381-2580 (option 1) and reserve yours.


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