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History: Found throughout North America, these unique freight cars are commonly found in large groups near major carbon black producers or users. They can also be seen singularly or in small blocks of cars in mixed freight trains. Both prototypes were painstakingly researched from field documentation, photographs, reference books, and builder drawings.
During the 1970s, Thrall Manufacturing Co. introduced a new railcar designed for handling carbon black. These 3-bay, 70-ton capacity covered hopper cars boasted a volume of 5750 cubic feet, and measured 51’ over their ends. Unlike traditional covered hopper designs, where the end slope sheets are plainly visible, these cars featured an enclosed, boxy design, which was a necessity due to a special design feature to aid in the unloading of carbon black.
At the inside ends of the car are special inflatable bags, called “granuflators”. When the car is loaded, they lay flat inside the car. When inflated with pressurized air, the granuflators expand, and push the carbon black towards the outlets. As typical with cars designed to haul carbon black, they featured tight-sealing 16” round roof hatches (22 or 28 depending upon customer specifications), sampling spigots on the car sides, and “butterfly” type outlet gates.
The “1970s” version of the 5750 represents production from approximately 1977 until 1979. This car features ten column-style posts per side and a unique roofline. While the ends are peaked and the end roof panels feature a single slope, the remaining roof panels feature a dual slope and a steep shoulder where it meets the side plate. Many of these cars are still in service today.
From 1997, a European subsidiary Thrall Europa manufactured wagons in York, UK. Thrall Europa, York works closed 2002. In 2000, Thrall Europa acquired the railway vehicle manufacturer ČKD Vagonka Studénka (Czech Republic), renamed Thrall Vagonka Studénka. In 2006 Trinity Industries sold off its European operations to International Railway Systems. The closely held company was sold to Trinity Industries, based in Dallas, Texas, in 2001. The company was subsequently renamed Trinity Rail Group, LLC.
Item Links: We found: 1 different collections associated with Rail - Rolling Stock (Freight) - Covered Hopper - Thrall 5750
- Collection N Scale Model Trains: 16 different items.
Item created by: gdm on 2018-03-13 11:43:10
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