Route of the Broadway LION
Route of the Broadway Lion, The largest Subway Layout in North Dakota
at Assumption Abbey, Richardton North Dakota
The Largest Subway Layout in North Dakota
Operations
There are nine scale miles from the 242nd Street station, south to
the loop at the South Ferry station, and then back uptown to the
242nd Street station. The trip takes a single train 22.5 minutes.
Using eight train sets, the railroad runs a rush hour schedule on a
three minute headway, and a total of 576 revenue runs every 24
hours.
AUTOMATIC TRAIN CONTROL (ATC), is as far as I know, almost unique
to the Route of the Broadway LION among model railroaders. Gone are the
throttles, the reversing switches, the cab controls, the radio controls, the
digital controls, and even the computers. In common with DCC the power is
on all of the time. Unlike DCC and other control schemes, there is no
command carrier. Indeed, trying to run ten trains at once, making all of the
scheduled stops is far beyond the capacity of one operator. Resistors
embedded in the tracks slow the trains down as they approach a station.
Once the train passes an open gap at the end of the station it stops there.
Since the car lights are battery powered they remain lit. A time clock in the
main control panel runs out, a relay will pull in applying power to the train, and
by the way, clearing the block signals. A second set of resistors embedded in
the tracks allow the train to pick up speed. This system also keeps separation
between trains, and the trains running on time.
Because the voltage delivered to the tracks would vary with the number of
trains moving at any particular moment, regular transformers were discarded
in favor of a 12 volt, 15 amp regulated power supply. The train sets run by the
LION were manufactured at different times and have different operating
characteristics. The slowest trains require 10 volts to run at a scale 35 miles
per hour, the faster trains need resistors across their motor circuits to match
their speeds across the fleet.
This timer switch controls the start of trains from each station. It
turns one revolution per minute, and each of six circuits are
energized for 10 seconds at a time. It is a GE product, about 70
years old and has no part number on it. But the switches were
built in to it, and when Brother John showed it to me, I grabbed it
for the railroad. Apparently it was setup to control the firing of an
oil burner before I put it on the railroad.