Unknown - 712 - Gondola, Bathtub, Trinity Rotary - Chicago & North Western - 880313

Model Information: These models come with optional, user-installed weights and internal bracing.

Prototype History: There have been a number of designs of coal-hauling gondolas for todays operations. Most of the major builders have offered aluminum-bodied coal gons at one point or another. Bethlehem Steel Car made a significant introduction with its Bethgon design. This design continues with Johnstown America today. The basic design uses two longitudinal tubs between the trucks - thus adding additional cubic-foot capacity with a lower center of gravity.

In 1992, Trinity Industries introduced a similar design and called it the Aluminator. Six demonstrators were built and placed under Trinity Industries Leasing Company reporting marks (TIMX 1001-1006). This initial design was rated at a 4,400 cubic-foot capacity. Most new-built coal cars (hoppers and gondolas) are built to a standardized 53' 1" outside length. The Trinity Aluminator is no exception. The 4400 design has a 12' 7" extreme height (11' 6" inside height). What made the Aluminator unique was the way the bottom of the tubs slope down ward from the center to the ends (the Bethlehem/Johnstown design had straight bottom tubs). The body has 13 side posts each with an alternating rivet pattern. There are three internal cross braces (at the 4th, 7th and 10th side posts). Trinity's aluminum rotary dump gondola features twin longitudinal tubs located on either side of the steel center sill.

Road Name History: The Chicago and North Western Transportation Company (reporting mark CNW) was a Class I railroad in the Midwestern United States. It was also known as the North Western. The railroad operated more than 5,000 miles (8,000 km) of track as of the turn of the 20th century, and over 12,000 miles (19,000 km) of track in seven states before retrenchment in the late 1970s.

Until 1972, when the company was sold to its employees, it was named the Chicago and North Western Railway. The C&NW became one of the longest railroads in the United States as a result of mergers with other railroads, such as the Chicago Great Western Railway, Minneapolis and St. Louis Railway and others.

By 1995, track sales and abandonment had reduced the total mileage back to about 5,000. The majority of the abandoned and sold lines were lightly trafficked branches in Iowa, Illinois, Minnesota, South Dakota and Wisconsin. Large line sales, such as those that resulted in the Dakota, Minnesota and Eastern Railroad further helped reduce the railroad to a mainline core with several regional feeders and branches.

The company was purchased by Union Pacific Railroad (UP) in April 1995 and ceased to exist.