Re: NP Wood Reefer


Dennis Storzek
 

On Mon, Nov 18, 2019 at 12:36 PM, Todd Sullivan wrote:
90002-90799 RS - Steel Underframe - L 43'-1" cuft 2086 - 490 cars
90802-90999 RS - Steel Underframe - L 43'-1" cuft 2086 - 135 cars
92001-92942 RS - Steel Underframe - L 43'-0" cuft 2041 - 358 cars
93000-93950 RS - Steel Underframe - L 43'-1" cuft 2086 - 199 cars
94442-94920 RS - Steel Center Sills - L 43'-4" cuft 2086 - 19 cars
99942-99966 RS - Steel Center Sills - L 43'-4" cuft 2148 - 5 cars
     99967       RS - Steel Center Sills - L 43'-4" cuft 2086 - 1 car
99968-99995 RS - Steel Center Sills - L 43'-4" cuft 2148 - 25 cars
Ignoring the 999xx series cars, which all seem to be later rebuilds, It appears the NP worked backward from 94999, so the high numbered cars are the oldest. This seems to be supported by the fact that the 94xxx series cars are marked "steel center sills" while the others are "steel underframe." Those oldest cars would be the cars with truss rods.

It's always iffy to rely on the equipment diagram drawings for this sort of data, because the drawings are little more than caricatures, just diagrams on which to hang dimensions. However, the diagram that Aaron posted for 94400-94899, built 1917, is most definitely showing truss rods, The diagram for 93000-93999, built 1922, has two little rectangles under the sill where one would expect to find the cross bearers, and I'll make the argument that the draftsman is trying to show us the shallow "USRA style" crossbearers. Now, if we had a diagram for the low 90000 cars built in 1931 and it shows the heavy crossbearers running all the way to the bottom of the center sills, we could be pretty sure that these three lots of cars had three different underframes. Better yet, a well lit photo of the 93000 series cars should confirm the form of their crossbearers, but photos that show the details of freightcar underframes are sometimes hard to come by.

Dennis Storzek


     

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