Arrowhead Models PC, Paint Scheme Set #A, Committee Design HopperArrowhead Models Penn Central, Paint Scheme Set #A, Committee Design Hopper Part Number: ARR10081 Description Arrowhead Models Penn Central, Paint Scheme Set #A, Committee Design Hopper About the Prototype: The Committee Design hopper is the most important open hopper on the Penn Central railroad. The car was developed as a joint effort between the Pennsylvania, Norfolk & Western and Chesapeake and Ohio railroads. Production was between July of 1958