first high-cube grain hopper to be offered as a R-T-R model in HO and N scale.
The ACF 5701 grain hopper is similar to its 5701 plastics relative except
it is equipped with continuous loading hatches and gravity outlets. The larger
size was needed to transport lower density grain-related and similar agricultural
products (e.g. feed, sunflower seeds etc) more efficiently than the then standard
4650, 4740, and 4750 cubic foot capacity grain hoppers. These were originally
built as 263,000 GRL (Gross Rail Loading) cars but many have recently been rebuilt
into the higher 286,000 GRL.