b. Switch engines. Fuel requirements for switch engines are

based on the number of these engines required and the hourly

consumption rate of each type of locomotive. The average number of

hours of operation for switch engines is 20 hours daily; 4 hours are

allowed for servicing and maintenance. When estimating the amount of

fuel required for switch engines, the first step is to multiply the

actual number of switch engines required (not including the 20

percent reserve factor as explained in chapter 3) by 20, the average

number of hours of operation. Next, multiply the result by the

appropriate fuel consumption factor from table VIII. The result is

the fuel consumption rate per day of operation. Multiply this by 30

to find the number of gallons required per month, and add 5 percent

to allow for contingencies. Following is an example of computing the

fuel requirements for switch engines.

In the example presented in the preceding subparagraph, assume

that you have already figured that you need seven switch engines to

operate the twodivision railroad. Since all engines are the same

type, compute the fuel rate as follows:

First, multiply the number of engines required by 20 to find

the number of hours of operation per day.

7 x 20 = 140 hours

Second, look at table VIII and find the consumption rate for the 60

ton dieselelectric locomotive; it is 8 gallons per hour. Multiply

this consumption factor by the number of hours per day of operation

to find the number of gallons of oil required each day.

140 x 8 = 1,120 gallons per day

Next, multiply the gallons per day by 30 to determine the amount

required per month.

1,120 x 30 = 33,600 gallons of oil per month

Finally, add 5 percent to allow for contingencies.

33,600 x .05 = 1,680 33,600 +.1,680 = 35,280 gallons

The amount of oil required for the switch engines for these two

divisions is 35, 280 gallons per month.