For transporting large or heavy items over land, nothing beats a railroad flat car. No wonder that manufacturers use flat cars to ship products or sub-assemblies ranging from transformers to airliner fuselages to heavy construction and mining equipment.

But how big is too big? That is determined by a railroad's loading gauge, which defines the maximum height and width of rolling stock and engines. Great Britain, the birthplace of railroading, has one of the smallest loading gauges because so much of its network has bridges and tunnels built in the mid-1800s, when trains were smaller. In the US, older, more urban eastern roads tend to have smaller loading gauges than western roads that traverse wide-open spaces. That's why, for example, 1950s-era vista-dome passenger cars were common on western railroads but rare in the east.

Over the years, flatcar designers have devised various means of squeezing the most inside a loading gauge, with one of the most popular being the depressed center flat car. Dropping the car floor down, until it almost touches the rails between the car's trucks, allows room for larger loads like the rocket and trailer depicted on our model.

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.

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