Micro-Trains - 55180 - Open Hopper, 2-Bay, Offset Side - Frisco - 91735

Model Information: The 33' Offset-Side open hopper was introduced in 1979. It is known by collectors as body style '055' or '55000 Series'. This model has been produced in over 100 different varieties since then, making it a fairly popular body style. Newer versions may come with a factory supplied load and low profile wheels.

Prototype History: The late 1920s saw the introduction of the AAR standard “offset-side” 50- and 70-ton hoppers. The design went through several variations in the late 1920s and early 1930s before settling on two versions of the 50-ton car and one 3-bay, 70-ton car in 1935. Most roads went for the AAR standard designs, but the N&W, VGN, and Pennsy were notable holdouts. World War II brought the famous “war emergency” hoppers (only the N&W and MP bought the 70-ton version) and several composite versions of existing designs. After the war, AC&F found some brief success with a welded outside-stake hopper design, but the weld joints broke under the stress of loading and unloading rather than flexing like riveted joints. The offset-side design also had problems: the inside stakes were more prone to corrosion, and they suffered worse from loading and unloading stress than outside-staked hoppers. The design waned in the 1950s and was all but abandoned for new cars by 1960. Some roads (notably the C&O, the B&O, and the L&N) made the best of a bad situation by rebuilding their offset-side cars with all new outside-staked sides in the late 1950s and early 1960s.

Road Name History: The St. Louis - San Francisco Railway (reporting mark SLSF), also known as the Frisco, was a railroad that operated in the Midwest and South Central U.S. from 1876 to April 17, 1980. At the end of 1970 it operated 4,547 miles (7,318 km) of road on 6,574 miles (10,580 km) miles of track, not including subsidiaries Quanah, Acme and Pacific Railway or the Alabama, Tennessee and Northern Railroad; that year it reported 12,795 million ton-miles of revenue freight and no passengers. It was purchased and absorbed into the Burlington Northern Railroad in 1980.

The St. Louis - San Francisco Railway was incorporated in Missouri on September 7, 1876. It was formed from the Missouri Division and Central Division of the Atlantic and Pacific Railroad. This land grant line was one of two railroads (the other being the M-K-T) authorized to build across Indian Territory. The Atchison, Topeka and Santa Fe Railroad, ATSF, interested in the A & P right of way across the Mojave Desert to California, took the road over until the larger road went bankrupt in 1893; the receivers retained the western right of way but divested the ATSF of the St. Louis-San Francisco mileage on the great plains. After bankruptcy the Frisco emerged as the St. Louis and San Francisco Railroad, incorporated on June 29, 1896, which also went bankrupt. On August 24, 1916 the company was reorganized as the St. Louis - San Francisco Railway, though the line never went west of Texas, being more than 1,000 miles (1,600 km) from San Francisco.

From Wikipedia

Brand/Importer Information: Micro-Trains is the brand name used by both Kadee Quality Products and Micro-Trains Line. For a history of the relationship between the brand and the two companies, please consult our Micro-Trains Collector's Guide.

Manufacturer Information: Kadee Quality Products originally got involved in N-Scale by producing a scaled-down version of their successful HO Magne-Matic knuckle coupler system. This coupler was superior to the ubiquitous 'Rapido' style coupler due to two primary factors: superior realistic appearance and the ability to automatically uncouple when stopped over a magnet embedded in a section of track. The success of these couplers in N-Scale quickly translated to the production of trucks, wheels and in 1972 a release of ready-to-run box cars.
In October 1990 Kadee separated in two companies, with the newly created Micro-Trains® Line Co. continuing the Z, Nn3, and N Scale product ranges, with Kadee retaining the HO range.