The
chart
on the preceeding page should be
used
to
establish
mixture
settings
in
take-off,
climb
and
cruise
conditions.
For
maximum
performance
take-off,
mixture
may
be
set
during
static
full power
run-up,
if feaSible,
or
during the ground
roll.
NOTE
Enrichen
mixture
during
climb
if
excessive
cylinder
head
temperatures
occur.
In the event
that
a
distinct
peak
is
not obtained,
use
the
corresponding
maximum EGT
as
the
reference
point
for
enriching the mixture
to
the
de-
sired
cruise
setting.
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.
TRUE
AIRSPEED
INDICATOR
A
true
airspeed
indicator
is
available to
replace
the
standard
air-
speed
indicator
in your
airplane.
The
true
airspeed
indicator
has
a
cali-
brated
rotatable
ring
which
works
in conjunction with the
airspeed
indi-
cator
dial in a
manner
similar
to the
operation
of
a flight
computer.
TO
OBTAIN TRUE AIRSPEED,
rotate
ring
until
pressure
altitude
is
aligned with outside
air
temperature
in
degrees
Fahrenheit.
Then,
read
true
airspeed
on
rotatable
ring
opposite
airspeed
needle.
NOTE
Pressure
altitude
should not be confused with indicated
altitude.
To obtain
pressure
altitude,
set
barometric
scale
on
altimeter
to
"29.92"
and
read
pressure
altitude
on
altimeter.
Be
sure
to
return
altimeter
barometric
scale
to
original
barometric
setting
after
pressure
alti-
tude has been obtained.
ELECTRIC
ELEVATOR
TRIM
SYSTEM
An
electric
trim
system
is
available to
facilitate
trimming
the
air-
plane. The
system
is
controlled
by a
slide-type
trim
switch on the left
side
of the
pilot's
control
wheel and a disengage switch
located
above the
elevator
trim
control
wheel. Pushing
the
trim
switch to the
forward
position,
labeled
"DN,
If
moves the
elevator
trim
tab
in
the
"nose
down"
direction;
conversely,
pulling the switch aft to the
"UP"
position
moves
the
tab
in
the
"nose
up"
direction.
When the switch
Is
released,
it
automatically
returns
to the
center
off position,
and
elevator
trim
tab
motion
stops.
The disengage switch, when in the "DISENGAGE"
posi-
tion,
removes
all
electrical
power
from
the
system
by
de-energizing
the
motor
and clutch
circuits.
A
servo
unit, (which includes a
motor
and
chain-driven,
solenoid
operated
clutch)
in
the
right
tail
boom,
actuates
the
trim
tab
to
the
select-
ed
position. When the
clutch
is
not
energized
(trim
switch off) the
elec-
tric
portion
of the
trim
system
freewheels
so
that
manual
operatlon
is
not
affected.
It
also
freewheels
while the wing flaps -
elevator
tab
intercon-
nect
system
is
operating.
The
electric
trim
system
can
be
overpowered
at
any
time
by manually
rotating
the
trim
wheel, thus
overriding
the
servo
that
drives
the
electric
trim
tab. .
NORMAL
OPERATION.
To
operate
the
electric
elevator
trim
system,
proceed
as
follows:
(1)
(2)
(3)
(4)
Master
Switch
--
"ON. "
Elevator
Trim
Disengage Switch
--
"ON" (aft p
Trim
Switch
--
Actuate
as
desired.
Elevator
Trim
Position
Indicator
--
Check.
osition).
NOTE
To check the
operation
of the disengage switch,
actuate
the
elevator
trim
switch with the disengage switch
in
the
disengage position.
Observe
that the manual
trim
wheel
and
indicator
do not
rotate
when the
elevator
trim
switch
is
activated.
7-19
___
u
I
I
Jr
..
1
ill
7-18
To Next Page
Loading...
