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Märklin BR 78 Betriebsanleitung Seite 50

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3
Operation on a layout
3.1 Operation on a layout
3.1.1 Connections between the
track layout and the
transformer
Rail joiners must fit well on the rails of
the track to which they are joined to
avoid voltage drop on the layout. We
recommend that you install feeder
wires every 2 to 3 meters (7 to 10 feet)
using the 5654 feeder clips.
50
3.1.2 Operating the locomotive
on grades
In contrast to the prototype a loco-
motive on a model railroad can ope-
rate up steeper grades. As a general
rule a grade should be no steeper
than 3%. In extreme situations a
maximum grade of 5% is permissi-
ble, keeping in mind that the locomo-
tive's tractive effort will be less. The
beginning and the end of the grade
must always work gradually up to
maximum grade for the route. The
maximum allowable difference in
grade between two track sections,
each with a minimum length of
300 mm (11-3/4") is 1 to 1.5 percent.
3.1.3 Running the Train
This locomotive model comes from
the factory with a reproduction proto-
type coupler on the front for the sake
of appearance and a claw coupler on
the rear for coupling cars to it. If you
want to use the locomotive in a stub
end terminal, you must first mount
the claw coupler included with the
train.
The reproduction prototype couplers
included with the train are mainly
designed for the situation where the
locomotive is to be a display model.
They can be used on the locomotive
when it is going to be run only on
very large curves (3 meters / 10 feet
in radius or larger). This applies parti-
cularly to operation where the loco-
motive is going to be pushing cars,
where it is easy to have the buffers
between the locomotive and a car
coupled to it go past one another,
thus causing a derailment.

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