5.6. LUBRICANTS
The second category of supplies that must be included in railway
planning is the lubricants or oil and grease used on motive power and
rolling stock. The estimated requirement for these lubricants is
1,000 pounds per month for each train per day operated in either
direction over each division. To find the amount required, begin
with the first division and multiply the train density by two to
allow for twoway traffic. Next, multiply the result by 1,000 to
find the pounds required per month for that division. Repeat the
process for each division and then total the amount required for all
divisions to determine the total pounds of lubricants required per
month for the entire railroad.
5.7. SPARE PARTS
The third and final category of supplies is spare parts. Only
those parts necessary for the maintenance of motive power and rolling
stock are discussed here. An estimated 1.5 short tons of spare parts
per month are required for each train per day moving in either
direction over each division. Take the train density established for
the first division and multiply by 2 for twoway traffic, and then
multiply the result by 1.5 to determine the number of short tons of
spare parts required for that division each month. Repeat the
process for each subsequent division and total the results to
determine the number of short tons of spare parts required each month
for the entire railroad.
5.8. SUMMARY
Many items of supply are necessary to operate a railroad, but
the three principal kinds a military planner must estimate are fuel,
lubricants, and spare parts for the motive power and rolling stock
used for the operation.
Either coal or oil is used to run steam locomotives, and oil to
run dieselelectric locomotives. Fuel consumption rates for steam
locomotives are based on the number of pounds used and for diesel
electric locomotives on the number of gallons used. Both are
computed by the same method. However, road and switch engine
requirements are determined differently. Fuel for road engines is
based on the amount used per train mile, and fuel for switch engines
on the amount used per hour. A reserve factor of 10 percent for coal
and 5 percent for oil is added to the monthly requirement for these
engines to allow for contingencies.
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