The Atlas HO Master ACF Pressureaide Center Flow Hopper Car Engelhard 42525 models the ACF Industries Pressureaide Center Flow covered hopper car manufactured by ACF Industries (Founded in 1899 as American Car and Foundry). Using the original Center Flow (No center sill to restrict product flow) platform, ACF enhanced the design by including a pressure differential to speed the unloading of dry bulk commodities. The Pressureaide covered hopper cars are still in production- ACF Industries' successor American Railcar Industries continues to manufacture these very popular cars to this day.
Engelhard: Charles Engelhard began assembling small chemical companies in Newark, NJ, in 1902. In 1905 he named his company the Hanovia Chemical and Manufacturing Company. Engelhard grew to become the largest refiner of platinum, gold, silver, and silver alloys in mill form in the world. In 1963 Engelhard purchased an interest in Minerals & Chemical Phillippe, which was involved in spot trading of precious metals. Explosive growth in the Phillippe sector was disturbing to the slower growing chemical parts of the company, and in 1981 MCP was spun off. The surviving company, Engelhard Corporation, reassumed its role as a major New Jersey-based US chemical company. In 2006 Engelhard was merged into German multinational chemical giant BASF.