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Piper Cherokee 140 Owner's Handbook Manual page 32

Piper cherokee 140 aircraft owner's handbook

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SECTION
III
THE
PIPER CHEROKEE
STALTS
stalt
characteristics
of
tfie
cherokee
are
conventional. Visual
stall
warning
is
provided
by a
red
light
located
on the left
side
of
the
instruÅnt
panel
which
is
turned
on
automatically betwcen
5-
and
1O
miles per
hour
above
stall
spced. Gross
weight stalling
speed
with.power
off
and
full
flaps is 52 miles
pcr
hour at
1950 pounds and 54 miles per
hour
at
215o pounds.
With
flaps up
this
sPeed
is increased 9 miles per
hour.
lntentional
sPins are
prohibited
in
the
normal
category
airplane'
For
approved
maneuver§ and
entry
speeds
refer
to
the
Flight
Manual'
CRUISING
The
cnrising
speed
of
thå
Chetokee
is
determincd by
many
factos
including powei setdng,
altitude,
temPcraturg loading,
and equipment
installed on
the
airPlane.
The normal cruising power
is
75%
of
the rated horsepower-of
the
engine.
Tnre
airspeedr,
wi,ict
may be obtained
at
*eriors
altitudes
and
polwer
rettings,
can
be determined
from the
chans
in "Section
IV"
of
this
handbook.
Usc
of the
mixture control
in
cmising
flight
reduces fuel
consumption
significantly,
especially
at
higher
dtiodes,
and
rcduces
lead
deiosits
wfren
thc
"it"-it.
fuels
are used.
The mixture
should
be
leaned
whcn
75o/o
power
or
less
is
being used,
If
any
doubt exists-T-t9
the amount
of
power
being used,
the mixture
should be
in
the FULL
RICH
position
for all
opirations.
Æways
enrich
the
mixture
before
increasing powcr settings
The
-continuous
,se of
carburetor
heat during
cruising flight
decreases
engine
efficiency.
unles
icing
conditions
in
the
carburetor
are severe,
do not
cruisc
with
thc
heat
on. Apply
full
carbuetor
heat
slowly and
only
for a
few
seconds
at
intervals determined
by
icing
seventy,
In-
order
to
keep
the
airplane
in
best
lateral
trim
during
cruising
flight,
the
fuel
should
be
used
elternately
from
each
main
tank'
It
is
rJommended that
one main
tank
be
used
for
one
hour
after take.off;
the
other
main
tank
used
until
nearly exhausted,
then return
to
the
first
main
tank.
r8
770527

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