Specifications

cHEROttEE
SrX-300
Standard electrical accessories
include
the
starter.
the
electric
fuel
pump,
the
stall
warning
indicator. the
cigar lighter,
the
ammeter,
and the annunciator
panel*.
The
annunciator
panel*
includes
alternator and
low
oil
pressure
indicator lights.
When
the
optional
gyro
system is
installed,
the annunciator
panel
also
includes
a low
vacuum indicator
light.
The
annunciator
panel
lights
are
provided
only
as
a warning to
the
pilot
that a system
may
not be
operating
properly.
and that he
should check
and monitor
the
applicable system
gauge
to determine
when
or if any
necessary
action
is required.
Optional electrical tccessories
include
the
navigation
lights. an
anti-collision
light,
and
instrument
panel
lighting.
Circuit
provisions are
made
to handle
a
full
complernent
of
communications and navigational
equipment.
The
alternator
system
offers
many advantages
over a
generator
system.
The
main
advantage
is
full electrical
power
output at
much lower
engine speed. which results
in improved
radio
and
electrical
equipment
operation. Since
the
alternator output is
available
all the
time,
the battery will
be charging
almost continuously.
This will
make
cold
weather
starting
easier.
The ammeter in
the alternator
system
displays
in
amperes the load
placed
on
the alternator. It
does not
indicate
battery discharge. With
all
electrical
equipment
off
(except
the masterswitch)the
arirmeter
will
be
indicating
the
amount
of
charging current
demanded
by the
battery.
As
each item of
electrical equipment is
turned
on, the
current
will increase to
a
total appearing
on
the
ammeter. This
t6tal
includes the battery.
The maximum
continuous
load for
night
flight, with radios on, is about 30
amperes.
This 30 ampere value,
plus
approximately 2
amperes
for
a fully charged
battery,
will
appear continuously
under these flight.conditions.
The msster switch
is
a split
switch with
the left
half operating the master
relay and the right half
energizing
the
alternator. This
switch is
interlocked
so that the
alternator
cannot
be
operated
without
the battery.
For normal operation,
be
sure that both
halves are
turned on.
If no output
is indicated
by the
ammeter during flight,
reduce
the electrical
load
by turning off
all
unnecessary
electrical
equipment.
Check both
the
5
ampere field breaker
and the
50
ampere
output breaker
and
reset if
open. If neither circuit breaker
is
open, turn
off the alternator
switch
for
I
second
to reset the ovewoltage
relay.
If
the ammeter
continues to indicate
no
output,
turn
off the
alternator switch; maintain
a minimum
electrical load; and
terminate
the
flight
as
soon
as
practical.
Maintenance on
the alternator
should
prove
to be a minor
factor.
Should
service be
required,
contact a Piper Dealer.
|
'Seriat
nos.
7540001
and
up
AIRPLANE AND
SYSTEMS
REVISED: JUNE
20,1974
2-10