Walthers 910-46526 HO Scale 50' AAR Single Door Boxcar Pennsylvania PRR 72699 Brushless - 21.5T Slide-molded tire made by 1

Slide-molded tire made by 1 detail in plastic

Cam-style servo saver

The -800 entered service in 1998 and competes in the same class with the Airbus A320

crew compartments

Walthers 910-46526 HO Scale 50' AAR Single Door Boxcar Pennsylvania PRR 72699 Brushless - 21.5T Slide-molded tire made by 1Walthers 910 46526 HO Scale 50' AAR Single Door Boxcar Pennsylvania PRR 72699 The Association of American Railroads had been trying to set design standards for freight cars starting in the early 20th century. The early designs were not widely embraced. Many railroads preferred their own designs. By the time the 1937 AAR boxcar was introduced, this had begun to change as each new design standard provided higher capacity, lighter, more durable cars.