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.