Urbandale Runaround, the engine is uncoupled from the train
and proceeds past the north siding switch. The conductor
dismounts from the locomotive and reaches for his key. He
unlocks the switch and throws it for the siding, then signals the
locomotive to back past the switch. Once the engine is clear of
the switch he sets the points back to the main track and relocks
the switch. The conductor boards the engine for the trip down
the runaround track.
After arriving at the south siding switch, the process is
repeated. The conductor again unlocks the turnout and lines
it to allow the locomotive to leave the siding. When it’s in the
clear, the switch is thrown back to the main and relocked,
Locking up your layout -10
19
19: The cabinet lock cam arm presses the shim tight
against the sub-roadbed and lifts the wire into the
throwbar, preventing the switch from being thrown.
Several cam arm lengths are available for cabinet locks.
MRH-Dec 2013
