"CRUSADER
250," "250
CLIPPER"
AND
"CRUSADER
SPORTS"
35
LIGHTING
SET
The electrical equipment fitted to these machines
combines the advantages of a Magdyno (or magneto
and separate dynamo) system with those of a battery
and coi! ignition system with a D.C. dynamo to charge
the battery, and has advantages over both these systems.
The generator consists of a rotor mounted on the
end of the driving shaft
of
the engine and containing six
powerful permanent magnets arranged to produce
six
poles altemately north and south.
Surrounding the rotor are three pairs of series-
connected coils carried on a laminated core plate
mounted directly on to the crankcase.
Rotation of the rotor in the stator produces an alter-
nating voltage in the stator coils. Electrical connection
is
made between the stator coils and a full wave selenium
rectifier which acts in effect like a non-return valve, per-
mitting current to pass
in
one direction only so that the
output from the rectifier
is
uni-directional current which
can be used to charge a battery.
The headlamp
is
mounted in a specially designed
"
Casquette
"
fork head which contains an ammeter and
a lighting switch. A two-position ignition switch
is
mounted
in
the near-side tool-box cover.
Switch Positions
Emergency Start. An emergency starting
pos1t10n
is
provided on the ignition switch. This
is
for use
if
the
battery has become discharged and a normal start cannot
be made.
In
the switch position
"EMG"
the alternator
is
connected directly to the ignition coi! -and this allows
the engine to be started independently of the battery.
Note that,
if
the battery
is
removed, the emergency start
will not fonction unless the lead normally connected to
the battery negative terminal
is
earthed.
The
emergency
start system
fonctions
better with a discharged battery
than with a fully-charged one.
Proper functioning of the emergency starting
feature
is
dependent on accurate ignition timing being
25
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