for each division terminal. You also need 4 at the port
220 + 67 = 3+, or 4
and 4 at the railhead. Thus far, your switch engine requirements
should look like this:
4
at the port terminal
3
at the 2d division terminal
3
at the 3d division terminal
4
at the railhead
14
subtotal
To get the total required for the entire railroad, you must add
20 percent to the subtotal to allow a reserve for maintenance and
operational peaks.
14 x .20 = 2.80+ or 3; 14 + 3 = 17
Table VII. Disposition of Switch Engines
3.9. SUMMARY
The three types of equipment that must be included in a rail
plan are rolling stock, road engines, and switch engines. The
question is, how many of each type will be required for a particular
operation?
The number of cars (rolling stock) needed is based on 1 day's
dispatch. Remembering that the payload of a car is 50 percent of its
rated capacity, you find 1 day's dispatch by multiplying the end
delivery tonnage by the percent of the gross division tonnage to be
carried in each type of car, then by dividing the result by the
payload of the cars. This gives the number of cars by type for 1
day's
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