A Non too subtle stairstep freight on the SP&S
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Bruce mentioned a train of boxcars with a stairstep effect and here is one on the SP&S:
Northwest of Mike Brock
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> On Behalf Of Bruce Smith
Sent: Sunday, July 17, 2022 2:34 PM
Subject: Re: [RealSTMFC] UTLX Class X Tank Car Build
I would disagree with you on this. Since "modern day" (for this list is 1959), we'll only talk about this and backwards. Tanks cars in petroleum service ranged from 6,000 to 12,000 gallons, with a few exceptions, with the most common sizes depending on the fleet (8K for SHPX, and 10 K for UTLX). The largest owners were the 3 leasing fleets, SHPX, UTLX, and GATX and those fleets were anything but uniform. The reason for that is pretty obvious if you think about it and that relates to the traffic. Bothe pre-WWII and post WWII, the basic traffic was from refineries to distributers and the distributers had different needs with respect to amount. Thus, the loadout at the refinery typically shows multiple different types of cars. There also wouldn't be long strings on tank cars out on the railroad with a couple of exceptions. One would be the local, serving the refinery. Both delivery of empty cars tod and pick of loaded cars from the refinery would be a string of different cars, as these cars would be split up at the local yard for their destinations. The other example might be a train like the PRR TRS symbols. Standing for "tank, reefer, stock", these trains were designed to expedite empties to get them off the railroad. Having all sorts of empties would mean a variety of cars. When we think about WWII, which is about the only time long strings of tank cars moved over major railroads for any distance, these were whatever car could be grabbed and so they were classic "dog's breakfast" of tank cars.
Bottom line? For the purposes of this list, trains of tank cars should resemble trains of boxcars, with a stairstep effect (albeit perhaps more subtle) due to the variety of cars in service.
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> on behalf of Clarence Zink <clarence.zink@...>
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