Q2 Z2,(Q2) Z2(Q2) - Institute for Water Resources - U.S. Army

and hauled the same amounL of the samc: commodity, and if thv cars
ere weight-limited for that commodity, then the cargo weight of a
train would be given by
C = N c kL.
In addition to the cargo weight of a train, it will be neces-
sary in the subsequent analysis to know the tare or light weight of
the cars and the gross weight of the locomotive. Again, for any
given freight car, one can easily determine the tare weight of the
car, w . 2 T herefore, for any given train of cars, one can deter-
L.
1
mine the light weight of the train of cars
W t =
i= 1
w t.'
where N c is the number of cars in the train. The gross weight of
one freight car is
WC. = C. Wt. ,
1
1
and the gross weight of the train of cars is
(5.5)
(5.6)
W = C + W t . (5.7)
The gross weight of a locomotive may be similarly obtained. 3 . How-
ever, the gross weight of a locomotive seems to be related to its
horsepower and number of axles, i.e., for a given number of axles
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