Piper Cherokee 140 - Stall Characteristics; Cruising Flight Operations

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.
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