WING
LEVELER
Jecdon H
A
wing
leveler may be installed to
augment
the
lateral
stability
of the
airplane.
The
system
uses
the
Turn
Coordinator for roll and
yaw sensing.
DESCRIPTION AND
OPERATING
DETAILS
Vacuum
pressure, from the
engine-driven
vacuum punip,
is
routed
from
the Turn
Coordinator
to
cylinder-piston
servo units
attached
to
the aileron
control
system.
As the airplane deviates
from
a wiiig level attitude,
vacuum
pressure in the servo units is increased or
relieved as needed to
The
following
paragraphs
describe
the
systems and
equipment
whose
actuate
the
ailerons to oppose
the
deviations.
function and
operation is
not obvious when
sitting
in
the airplane.
This
section
also
covers in
somewhat
greater detail some
of the
items listed
A
separately
mounted
push-pull
control
knob,
labeled
"WING
LVLR,
"
in Check
List
form in
Section
I
that
require further explanation.
is provided
on
the
left
side
of the instrument
panel to turn the system
on
and off. A
"ROLL TRIM" control knob on
the Turn Coordinator is
used
for
manual roll
trim
control to compensate
for asymmetrical
loading of
fuel
and
passengers,
and
to
optimize system performance
in
climb, cruise FUEL SYSTEM.
and
let-down.
Fuel is
supplied to the
engine
from
two tanks,
one in each wing.
With
the
fuel selector
valve on "BOTH,
"
the
total usable
fuel for
all
flight
con-
ditions
is 38
gallons for
the
standard tanks and
48
gallons for the
optional
OPERATING
CHECK
LIST
longrangetanks.
Fuel
from
each
wing
tank flows
by gravity to a
selector valve.
De-
TAKE-OFF.
pending upon
the
setting
of the
selector
valve,
fuel from the left, right,
or
both
tanks
flows
through a
fuel
strainer
and carburetor
to
the.engine
(1)
"WING
LVLR" Control
Knob
--
Check
in off
position
(full in).
induction
system.
CLM
&
IMPORTANT
The fuel selector
valve should be
in the
"BOTH"
position
(1) Adjust elevator
trim for climb.
for
take-off, climb, landing,
and maneuvers
that
involve
(2) "WING
LVLR"
Control Knob
--
Pull
control knob "ON." prolonged
slips
or
skids.
Operation from
either
"LEFT"
(3) "ROLL
TRIM"
Control
Knob
--
Adjust
for wings
level
attitude. or
"RIGHT" tank
is
reserved
for
cruising flight.
CR UISE.
NOTE
When
the fuel
selector
valve
handle is in
the
"BOTH"
(1) Adjust power
and
elevator
trim
for level flight.
position in cruising
flight, unequal fuel
flow
from each
(2) "ROLL TRIM"
Control
Knob
--
Adjust as desired.
tank may
occur if
the
wings are not maintained exactly
level. Resulting
wing heaviness
can be alleviated
DESCENT.
gradually
by turning
the
selector valve handle to
the
tank
in
the "heavy"
wing.
(1) Adjust
power and elevator trim
for desired
speed
and rate
of
descent.
For
fuel
system
servicing
information,
refer
to
Lubrication
and
(2) "ROLL
TRIM" Control
Knob
--
Adjust
as desired. Servicing
Procedures
in
Section
IV.
6-6
2-1
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