A 60,000 lb. car would then weigh 689 lbs. in HO?Paul, objects have 3 dimensions, so 87.1 x 87.1 x 87.1
equals (approx) 660776, so a 200,000 lb loaded prototype
car in should weigh 4.84 ounces in HO scale. The NMRA
recommendations are in that ballpark.