NOTE
Operation at peak
EGT
is not
authorized for
continuous
operation, except to
establish
peak EGT
for reference
at
75%
power or
less.
Operation
on
the
lean
side
of
peak EGT or within
25° of
peak
EGT
is not approved.
The
chart
on
page 7-11 should be used to
establish
mixture
settings
in take-off, climb, and
cruise
conditions.
The yellow index pointer may
be
set at
the
reference
point, or to a
specific
point to lean
to.
It can
be
positioned manually
by
turning the
screw adjustment
on
the face
of
the
instrument.
For
maximum
performance
take-off, mixture may be
set
during
static
full-power
runup, if
feasible,
or
during
the ground
roll.
NOTE
Enrichen mixture
during climb if
excessive cylinder
head
temperatures occur.
When
leaning the mixture under some
cruise
conditions, engine
roughness may occur
before
peak
EGT
is
reached.
In
this
case,
use the
EGT
corresponding
to the
onset
of
roughness as
the
reference
point
in-
stead
of
peak EGT.
’
Changes
in
altitude or power
setting require
the
EGT
to be
rechecked.
Mixture may be
controlled
in
cruise
descent, by simply enriching to avoid
engine
roughness.
During prolonged
descents,
maintain sufficient power
to
keep the EGT needle on
scale.
In
idle
descents
or landing
approaches
use full
rich mixture. For
idle
descents or
landing approaches at high
elevations,
the mixture control may
be
set
in
a position to
permit
smooth
engine
acceleration
to maximum power.
T-12
Summary of Contents for 182 1973
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