Textron Cessna 172R User Manual

SECTION
4
NORMAL
PROCEDURES
CESSNA
MODEL
172R
NOTE
The
EGT
indicator
requires
several
seconds
to
respond
to
mixture
adjustments
and
changes
in
exhaust
gas
temperature.
More
rapid
changes
in
EGT
indication
are
neither
necessary
nor
desirable.
Determining
peak
EGT
and
setting
the desired
mixture
should take
approximately
one
minute when
the
adjustments
are
made
sufficiently
slowly
and
accurately.
FUEL
SAVINGS
PROCEDURES
FOR FLIGHT TRAINING
OPERATIONS
For best
fuel
economy
during
flight
training
operations,
the
following
procedures
are
recommended.
1
.
After
engine
start
and
for
all
ground
operations,
set
the
throttle
to
1200
RPM
and lean the mixture
for
maximum
RPM.
Leave
the mixture
at
this
setting
until
beginning
the
BEFORE
TAKEOFF
checklist.
After
the
BEFORE TAKEOFF
checklist is
complete
re-lean the mixture
as
described above until
ready
|
for
the
TAKEOFF
checklist.
2.
Lean
the
mixture
for
maximum
RPM
during
full
throttle climbs
|
above
3000
feet.
The
mixture
may
remain leaned
(maximum
RPM
at
full
throttle)
for
practicing
maneuvers
such
as
stalls
and slow
flight.
3.
Lean
the
mixture
for
maximum
RPM
during
all
operations
at
any
altitude,
including
those below
3000
feet,
when
using
80%
or
less
power.
NOTE
I
•
When
cruising
or
maneuvering
at
80%
or
less
power,
the mixture
may
be
further
leaned
until
the
EGT
indicator
needle
peaks
and
is then
enrichened
50°F.
This is
especially
applicable
to
cross-country
training
flights,
but
should
be
practiced
during
transition
flight
to
and
from
the
practice
area
as
well.
|
•
Using
the
above
recommended
procedures
can
provide
fuel
savings
in
excess
of
5%
when
compared
to
typical
training
operations
at
full
rich
mixture.
In
addition,
the
above
procedures
will
minimize
spark
plug
fouling
since the reduction
in
fuel
consumption
results
in
a
proportional
reduction
in
tetraethyl
lead
passing
through
the
engine.
1
4-28
Revision
7
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Textron Cessna 172R Specifications

General

Brand	Textron
Model	Cessna 172R
Category	Aircrafts
Language	English