PD Covered Hopper -- Wonder/Hostess

As covered hoppers evolved in the 1960s, larger cylindrical and rounded car bodies were introduced. This shape allowed more material to be carried and used gravity to force the load toward the bottom discharge outlets. Some of these designs also used pneumatic unloading systems. The continuing demand for still larger cars led Trinity Industries to introduce their new Power-Flo(R) pressure-differential hoppers (PD) in 1987. The design utilized proven technology by combining a pressurized system with rounded side walls. This allowed for increased payload and reduced the time needed for loading and unloading. Available in a variety of authentic roadnames, this easy-to-build car can serve virtually any industry on your layout requiring powdered materials.