[PRR-talk] Fwd: Re: How many shovels of iron ore does it take to fill an H-21?

[Tom Hayden]

I just watched "The Ore Train" again last night and there is a clear 
overhead view of two quad hoppers loaded with ore. Each has two "piles" of 
ore. Each pile is really a rather flat pile that reaches to just about the 
top of the slope sheet, where you can still see the joint between the slope 
sheet and vertical end. The other end of each flat pile tapers to just 
about zero depth (top of the middle hoppers) at the middle of the car. The 
car looks quite empty.

Tom Hayden

>It's been just a few weeks since I last watched the "Ore Train" video, and 
>I recall that the H21's looked almost empty. There are several views from 
>above looking into the cars and I would say that in terms of volume the 
>cars were less than 25% full. And the loads did consist of two piles, one 
>over each truck.
>
>Tom Hayden
>
>
>
>>Antracite coal, broken 1105
>>Bituminous coal, broken 833
>>Iron ore, crushed 2100 to 2900
>>
>>The densest iron ore weighs about 3.5 times the weight of the same
>>volume of bituminous coal.
>>
>>Looking more directly at your question, assume that a hopper car
>>heaped full of bituminous coal is at its weight capacity. Then that
>>car can carry only 2/7 that volume of iron ore. 2/7 = 0.286
>>
>>Figuring on the basis of the least dense ore, the car could be loaded
>>to 2/5 = .4 of "full".
>>
>>Recalling the few times I was able to see into a loaded hopper
>>carrying ore, the ore was in two heaps at the ends of the car.
>>Naturally, the heaps sloped down toward the center of the car and met there.
>>
>>Bob Netzlof a/k/a Sweet Old Bob



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