4550 Cylindrical Covered Hopper

Prototype Information

The National Steel Car 4550 cubic-foot cylindrical covered hopper emerged in the 1970s as part of Canada’s massive grain car program. Designed to move Prairie grain more efficiently, this 59-foot, four-bay car featured a distinctive rounded “teardrop” body that improved unloading and reduced corrosion compared to older boxy hoppers.

National Steel Car built thousands of these cars for the Canadian government, CN, and CP, joining similar versions from Hawker Siddeley and Marine Industries. The 4550’s smooth-sided design and welded construction gave it strength and durability for hauling wheat, barley, and canola across Canada and into U.S. export routes.

Through the 1980s and 1990s, these silver and colorful government grain cars became a signature sight on Canadian rails. While newer, larger hoppers have since replaced many of them, the NSC 4550 remains one of the most recognizable and influential covered hopper designs in North American railroading.