Specifications ASSEMBLY MANUAL

ASSEMBLY MANUAL
Specifications
Wingspan-------------------------------- 63.4 in --------------------- 161cm.
Wing area-------------------------------- 846 sq.in ----------- 54.6 sq.dm.
Weight------------------------------------- 8.4-9.9lbs -------------3.8-4.5kg.
Length------------------------------------- 61.4 in -------------------- 156cm.
Recommended engine size-------- .91-1.25 cu.in -------- 2-4stroke.
20cc gasoline engine.
Radio System required 6 channel with 6 digital servos.
Flying skill level __ Intermediate/advanced.
Kit features.
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Ready-made—minimal assembly & finishing required.
Ready-covered covering.
Photo-illustrated step-by-step Assembly Manual.
Made in Vietnam.
YAK 54.
Instruction Manual.
INTRODUCTION.
Thank you for choosing the YAK 54 ARTF by SEAGULL MODELS. The YAK 54 was designed with
the intermediate/advanced sport flyer in mind. It is a semi scale airplane which is easy to fly and
quick to assemble. The airframe is conventionally built using balsa, plywood to make it stronger than
the average ARTF, yet the design allows the aeroplane to be kept light. You will find that most of the
work has been done for you already.Flying the YAK 54 is simply a joy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual thoroughly before starting assembly of your YAK 54. Use the parts listing below to identify
all parts.
WARNING.
Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is
capable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU
ASSUME ALL RISK & RESPONSIBILITY.
If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C
supplier and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
procedures designed to help the new pilot on his way to successful R/C flight. They will also be able
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
PARTS LISTING.
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FUSELAGE ASSEMBLY
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(1) Fuselage.
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(1) Canopy hatch.
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.91-1.25 2-4 stroke engine.
20cc gasoline engine.
Computer radio with six digital
servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
Silicone fuel line.
WING ASSEMBLY
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(1) Right wing half/ aileron.
(1) Left wing half/ aileron.
(1) Aluminium dihedral brace.
Tail section assembly
TOOLS & SUPPLIES NEEDED.
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Thick cyanoacrylate glue.
30 minute epoxy.
5 minute epoxy.
Hand or electric drill.
Assorted drill bits.
Modelling knife.
Straight edge ruler.
2mm ball driver.
Phillips head screwdriver.
220 grit sandpaper.
90° square or builder’s triangle.
Wire cutters.
Masking tape & T-pins.
Thread-lock.
Paper towels.
!
!
(1) Horizontal stabilizer/ elevator
halves.
(1) Rudder halves.
Some more parts.
HARDWARE PACK
COWLING
Landing gear.....
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NOTE: To avoid scratching your new aeroplane we suggest that you cover your
workbench with an old towel. Keep a
couple of jars or bowls handy to hold
the small parts after you open the
bags.
Please trial fit all parts. Make sure you
have the correct parts and that they
fit and are aligned properly before
gluing! This will ensure proper assembly as the YAK 54 is made from
natural materials and minor adjustments may have to be made.
The paint and plastic parts used in
this kit are fuel proof. However, they
are not tolerant of many harsh chemicals including the following: paint
thinner, cyano-acrylate glue accelerator, cyanoacrylate glue de-bonder
and acetone. Do not let these chemicals come in contact with the colours
on the covering and the plastic parts.
Please contact Horizon Hobby for product support
and technical assistance at 877-504-0233.
Replacement parts are available from your local
dealer or through Horizon Hobby.
HORIZON HOBBY DISTRIBUTIONS INC
4105 Fieldstone Rd, Champaign, IL 61822-USA
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YAK 54.
Instruction Manual.
HINGING THE AILERONS.
Note: The control surfaces, including the
ailerons, elevators, and rudder, are
prehinged with hinges installed, but the
hinges are not glued in place. It is
imperative that you properly adhere the
hinges in place per the steps that follow
using a high-quality thin C/A glue.
T-pin.
! 1) Carefully remove the aileron from one
of the wing panels. Note the position of the
hinges.
! 2) Remove each hinge from the wing panel
and aileron and place a T-pin in the center of
each hinge. Slide each hinge into the wing
panel until the T-pin is snug against the wing
panel. This will help ensure an equal amount
of hinge is on either side of the hinge line when
the aileron is mounted to the aileron.
T-pin.
! 4)Deflect the aileron and completely
saturate each hinge with thin C/A glue. The
ailerons front surface should lightly contact the
wing during this procedure. Ideally, when the
hinges are glued in place, a 1/64” gap or less
will be maintained throughout the lengh of the
aileron to the wing panel hinge line.
T-pin.
Hinge.
Note: The hinge is constructed of a special
material that allows the C/A to wick or
penetrate and distribute throughout the
hinge, securely bonding it to the wood
structure of the wing panel and aileron.
T-pin.
Hinge.
C/A glue.
! 3) Slide the wing panel on the aileron until
there is only a slight gap. The hinge is now
centered on the wing panel and aileron.
Remove the T-pins and snug the aileron
against the wing panel. A gap of 1/64” or less
should be maintained between the wing panel
and aileron.
4
! 5) Turn the wing panel over and deflect the
aileron in the opposite direction from the
opposite side. Apply thin C/A glue to each
hinge, making sure that the C/A penetrates into
both the aileron and wing panel.
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HINGING THE RUDDER.
C/A glue.
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
! 6) Using C/A remover/debonder and a paper
towel, remove any excess C/A glue that may
have accumulated on the wing or in the aileron
hinge area.
! 7) Repeat this process with the other wing
panel, securely hinging the aileron in place.
! 8) After both ailerons are securely hinged,
firmly grasp the wing panel and aileron to
make sure the hinges are securely glued and
cannot be pulled out. Do this by carefully
applying medium pressure, trying to separate
the aileron from the wing panel. Use caution
not to crush the wing structure.
INSTALLING THE AILERON SERVOS.
Small weight.
Servo.
Thread.
We recommended to use long servos arm
(70mm diameter) for all servos without throttle
servo.
Install the rubber grommets and brass
collets onto the aileron servo. Test fit
the servo into the aileron servo mount.
Note: Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
HINGING THE ELEVATORS.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
Because the size of servos differ, you
may need to adjust the size of the precut
opening in the mount. The notch in the sides
of the mount allow the servo lead to pass
through.
Using a small weight (Weighted fuel pick-up
works well) and thread, feed the string through
the wing as indicated.
Small weight.
Thread.
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YAK 54.
Instruction Manual.
Wing bottom.
Thread.
Small weight.
Attach the string to the servo lead and
carefully thread it though the wing. Once you
have thread the lead throught the wing, remove
the string so it can use for the other servo
lead. Tape the servo lead to the wing to prevent
it from falling back into the wing.
Wing panel
bottom.
Pull.
Thread.
Thread.
Electric wire.
Electric wire.
Aileron electric.
Plastic tape.
Repeat the procedure for orther wing
haft.
Secure the servos with the screws provided with your radio system.
ENGINE MOUNT.
See pictures below:
4x30mm.
Wing bottom.
6
Mark and drill 4 holes for engine mount.
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Fuel Pick-up Tube.
Vent tube.
FUEL TANK.
Fuel Fill Tube.
INSTALLING THE STOPPER ASSEMBLY.
! 1) Using a modeling knife, carefully cut
off the rear portion of one of the 3 nylon tubes
leaving 1/2” protruding from the rear of the
stopper. This will be the fuel pick up tube.
! 2) Using a modeling knife, cut one length
of silicon fuel line. Connect one end of the line
to the weighted fuel pick up and the other end
to the nylon pick up tube.
! 3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
Balsa wood.
Carefully use a lighter or heat gun to
permenently set the angle of the vent tube.
Important: When the stopper assembly is
installed in the tank, the top of the vent tube
should rest just below the top surface of the
tank. It should not touch the top of the tank.
! 4) Test fit the stopper assembly into the
tank. It may be necessary to remove some of
the flashing around the tank opening using a
modeling knife. If flashing is present, make
sure none falls into the tank.
! 5) With the stopper assembly in place,
the weighted pick-up should rest away from
the rear of the tank and move freely inside the
tank. The top of the vent tube should rest just
below the top of the tank. It should not touch
the top of the tank.
! 6) When satisfied with the alignment of
the stopper assembly tighten the 3mm x 20mm
machine screw until the rubber stopper expands and seals the tank opening. Do not
overtighten the assembly as this could cause
the tank to split.
Attach the silicone fuel and pressure pipes
to the tank. The lower pipe is the ‘feed’ and the
upper two the ‘pressure and fill’. The fill pipe is
the next pipe.
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YAK 54.
Instruction Manual.
Engine 4 stroke:
You should mark which tube is the vent
and which is the fuel pickup when you attach
fuel tubing to the tubes in the stopper. Once
the tank is installed inside the fuselage, it may
be difficult to determine which is which.
Servo tray.
C/A glue.
Balsa wood.
Fuel tank.
Rubber band.
Throttle servo.
Vent tube.
Rudder
servo.
Fuel pick-up
tube.
Fuel fill tube.
ELEVATOR SERVO INSTALLATION.
Blow through one of the lines to ensure
the fuel lines have not become kinked inside
the fuel tank compartment. Air should flow
through easily.
! 1) Locate and cut out the covering film
from the servo holes in both sides of fuselage.
Left side.
INSTALLING THE FUSELAGE SERVO.
Engine 2 stroke:
Remove
covering.
Rudder servo.
Throttle servo.
8
! 2) Install the rubber grommets and brass
collets onto the elevator servo. Test fit the
servo into the elevator servo mount.
Because the size of servos differ, you
may need to adjust the size of the precut opening in the mount. The notch in the sides of the
mount allow the servo lead to pass through.
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! 3) Secure the servos with the screws provided with your radio system.
Right side.
Switch.
Elevator servo.
Left side.
Elevator servo.
HORIZONTAL STABILIZER.
!1) Using a ruler and a pen, locate the
centerline of the horizontal stabilizer, at the trailing edge, and place a mark. Use a triangle
and extend this mark, from back to front,
across the top of the stabilizer. Also extend
this mark down the back of the trailing edge of
the stabilizer.
INSTALLING THE SWITCH.
Install the switch into the precut hole in the
side of the fuselage.
Center line.
! 2) Using a modeling knife, carefully remove
the covering at mounting slot of horizontal stabilizer ( both side of fuselage).
! 3) Slide the stabilizer into place in the precut slot in the rear of the fuselage. The stabilizer should be pushed firmly against the front
of the slot.
Remove covering.
Switch.
! 4) With the stabilizer held firmly in place,
use a pen and draw lines onto the stabilizer
where it and the fuselage sides meet. Do this
on both the right and left sides and top and
bottom of the stabilizer.
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YAK 54.
Instruction Manual.
! 8) After the epoxy has fully cured, remove the masking tape or T-pins used to hold
the stabilizer in place. Carefully inspect the
glue joints. Use more epoxy to fill in any gaps
that may exist that were not filled previously
and clean up the excess using a paper towel
and rubbing alcohol.
Pen.
Remove covering.
! 5) Remove the stabilizer. Using the lines
you just drew as a guide, carefully remove the
covering from between them using a modeling knife.
Remove covering.
When cutting through the covering to
remove it, cut with only enough pressure to
only cut through the covering itself. Cutting
into the balsa structure may weaken it.
Covered wood
filler piece.
VERTICAL STABILIZER INSTALLATION.
! 6) Using a modeling knife, carefully remove the covering that overlaps the stabilizer
mounting platform sides in the fuselage. Remove the covering from both the top and the
bottom of the platform sides.
! 7) When you are sure that everything is
aligned correctly, mix up a generous amount
of 30 Minute Epoxy. Apply a thin layer to the
top and bottom of the stabilizer mounting area
and to the stabilizer mounting platform sides
in the fuselage. Slide the stabilizer in place
and realign. Double check all of your measurements once more before the epoxy cures.
Hold the stabilizer in place with T-pins or masking tape and remove any excess epoxy using
a paper towel and rubbing alcohol.
Hinge.
! 1) Using a modeling knife, remove the
covering from over the precut hinge slot cut
into the lower rear portion of the fuselage. This
slot accepts the lower rudder hinge.
Hinge slot.
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! 2) Slide the vertical stabilizer into the slot
in the top of the fuselage. The rear edge of
the stabilizer should be flush with the rear edge
of the fuselage and the lower rudder hinge
should engage the precut hinge slot in the
lower fuselage. The bottom edge of the stabilizer should also be firmly pushed against the
top of the horizontal stabilizer.
When cutting through the covering to remove it, cut with only enough pressure
to only cut through the covering itself. Cutting
into the balsa structure may weaken it.
! 5) Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
the vertical stabilizer is aligned 90º to the horizontal stabilizer.
Horizontal
Stabilizer.
! 3) While holding the vertical stabilizer
firmly in place, use a pen and draw a line on
each side of the vertical stabilizer where it
meets the top of the fuselage.
90º
Vertical
Stabilizer.
! 6) When you are sure that everything is
aligned correctly, mix up a generous amount of
30 Minute Epoxy. Apply a thin layer to the mounting slot in the top of the fuselage and to the sides
and bottom of the vertical stabilizer mounting
area. Apply epoxy to the bottom and top edges
of the filler block and to the lower hinge also.
Set the stabilizer in place and realign. Double
check all of your measurements once more before the epoxy cures. Hold the stabilizer in place
with T-pins or masking tape and remove any
excess epoxy using a paper towel and rubbing
alcohol. Allow the epoxy to fully cure before
proceeding.
Pen.
C/A glue.
! 4) Remove the stabilizer. Using a modeling knife, remove the covering from below
the lines you drew.
Remove
covering.
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YAK 54.
Instruction Manual.
AILERON CONTROL HORN INSTALLATION
2 sets.
ELEVATOR CONTROL HORN INSTALLATION.
! 1) Elevator control horn:
Mix a small amount of 30 minute epoxy and
lightly coat the inside of the hole in the elevator
and the 3x40mm control horn screw.
Horizontal fin.
3x45mm.
Elevator.
! 1) Aileron control horn:
Mix a small amount of 30 minute epoxy and
lightly coat the inside of the hole in the aileron
and the control horn screw.
Wing.
Aileron.
! 2) Thread the screw (insert the aluminium
washer) into the hole from the top of surface.
Wipe away any excess epoxy on the fin and
screw with rubbing alcohol and a paper towel.
Screw the M3 nut (insert the aluminium
washer) in place as shown. Alllow the epoxy
to fully cure.
Right side.
! 2) Thread the screw (insert the aluminium
washer) into the hole from the top of surface.
Wipe away any excess epoxy on the wing and
screw with rubbing alcohol and a paper towel.
Screw the M3 nut (insert the aluminium
washer) in place as shown. Alllow the epoxy
to fully cure.
Elevator control horn.
Wing bottom.
M3 lock nut.
M3 control horn.
Repeat the procedure for orther
elevator.
ELEVATOR PUSHROD INSTALLATION.
Elevator pushrods assembly follow pictures
below.
M3 nut.
Aluminium washer.
85mm.
Aileron control horn.
Wing bottom.
C/A glue.
Repeat the procedure for the other
wing.
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3x30mm.
Center the servo using the radio system.
Attach the servo arm to the servo using the
screw provided with the servo.
2x20mm.
Elevator pushrod.
Rudder
control horn.
Repeat the procedure for orther
elevator.
AILERON PUSHROD INSTALLATION.
Repeat the procedure for wing panel as
same as elevator pushrod.
Pushrod.
90mm.
! 3) Position the rudder horn on the both
side of rudder. The clevis attach- ment holes
should be positioned over the hinge line.
! 4) Using a 1.5mm drill bit and the control
horns as a guide, drill the mounting holes
through the rudder halves
! 5) Mount the control horns by inserting the
bolts through the control horn bases and
elevator halves, then into the mounting
backplates. Do not overtighten the nuts or the
backplates may crush the wood.
Elevator control horn.
Rudder control horn.
Repeat the procedure for orther
aileron.
RUDDER CONTROL HORN
INSTALLATION.
! 1) Position the rudder control horn on the
left - right side of the rudder.
! 2) Locate the two nylon control horns, two
nylon control horn backplates and three
machine screws.
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YAK 54.
Instruction Manual.
RUDDER PULL - PULL CABLE SYSTEM.
Pushrod.
Control horn.
See pictures below:
Metal clevis.
Cable.
M3 lock nut.
! 1) Insert servo arm into servo.
WHEEL AND WHEEL PANTS.
! 2) With the radio on, check the operation
of the rudder. Adjust the cables so when the
rudder servo is centered, the rudder is
centered as well. There will be tension on the
cables. Adjustments can be made at the rudder
control horn and at the servo arm. Once
adjustments are made, secure the servo arm
to the rudder arm servo using the screw that
came with the servo
! 1) Assemble and mounting the wheel pants
as shown in the following pictures.
Left side.
Cable.
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! 2) Follow diagram below for wheel pant
installation:
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Plywood Washer.
Wheel Collar.
Axle.
Nut.
Nut.
Wheel.
Landing Gear.
Wheel Pant.
Plywood Washer.
7mm.
14mm.
! 3) You have to trim each axles and using a
tool cutting and cut-off wheel.
lite-plywood block.
Caution when cutting the axles wear
protective goggles.
52mm.
! 4) A drop of C/A glue on the wheel collar
screws will help keep them from coming lose
during operation.
Repeat the process for the other wheel.
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YAK 54.
Instruction Manual.
140mm.
INSTALLING THE MAIN LANDING GEAR.
!1) The blind nuts for securing the landing
gear are already mounted inside the fuselage.
!2) Using the hardware provided, mount the
main landing gear to the fuselage.
4.2mm.
! 5) Bolt the engine to the engine mount using
6 X 20mm.
the four machine screws. Double check that
all the screws are tight before proceeding.
! 6) Attach the Z-Bend in the pushrod wire to
MOUNTING THE ENGINE.
! 1) Install the pushrod housing through the
predrilled hole in the firewall and into the servo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
the throttle arm on the carburetor. You will need
to remove the throttle arm from the car- buretor
to be able to attach the Z-bend. When
complete, re-attach the throttle arm to the carburetor.
Engine 2 stroke:
Make a Z-Bend 1/4" from one end of the plain
wire pushrod.
! 2) Place your engine onto the engine
mount. Adjust the engine is centered of the
edges of the engine case.
! 3) When you are satisfied with the alignment, mark the locations of the engine
mounting.
! 4) Remove the engine. Using an drill bit,
drill the mounting holes through the engine
mount at the four locations marked.
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4x30mm.
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Mark point.
Paper tape guide.
Pushrod wire.
Engine 4 stroke:
1mm drill bit.
Paper tape guide.
4x30mm.
Pushrod wire.
Mark point.
COWLING.
Trim and cut.
! 1) Slide the fiberglass cowl over the engine and line up the back edge of the cowl with
the marks you made on the fuselage then trim
and cut.
Paper tape guide.
Trim and cut.
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YAK 54.
Instruction Manual.
3x10mm.
Because of the size of the cowl, it may
be necessary to use a needle valve extension for the high speed needle valve. Make
this out of sufficient length 1.5mm wire and install it into the end of the needle valve. Secure the wire in place by tightening the set
screw in the side of the needle valve.
! 2) While keeping the back edge of the
cowl flush with the marks, align the front of
the cowl with the crankshaft of the engine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening. Use the spinner backplate as a guide.
Hold the cowl firmly in place using pieces of
masking tape.
INSTALLING THE SPINNER.
Install the spinner backplate, propeller and
spinner cone.
The propeller should not touch any part
of the spinner cone. If it does, use a
sharp modeling knife and carefully trim away
the spinner cone where the propeller comes
in contact with it.
INSTALLING TAIL STRUT SYSTEM.
1.5mm wire
(needle valve).
! 3) Install the muffler and muffler extension
onto the engine and make the cutout in the
cowl for muffler clearance. Connect the fuel
and pressure lines to the carburetor, muffler
and fuel filler valve. Secure the cowl to fuselage using the 3mmx10mm screws (4).
Tail strut system assembly follow pictures
below.
3x10mm.
Turnbuckle.
Elevator bottom.
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2.
62cm.
3x10mm.
Aluminium
strap.
MOUNTING THE TAIL WHEEL.
1.
33mm.
Plastic clip.
2.
! 1) You have to trim each axles and using a
tool cutting and cut-off wheel.
Caution when cutting the axles wear
protective goggles.
1.
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YAK 54.
Instruction Manual.
3x25mm.
! 2) Set the tail wheel assembly in place.
The pivot point of the tail wheel wire should
be even with the rudder hinge line and the tail
wheel bracket should be on the plywood
plate.
! 3) Using a pen, mark the locations of the
four mounting screws. Remove the tail wheel
bracket and tiller and drill 1mm pilot holes at
the locations marked.
THROTTLE SERVO ARM
INSTALLATION.
! 1) Install adjustable servo connector in
the servo arm.
Adjustable Servo
connector.
Servo arm.
! 2) Install the rubber grommets and brass
collets onto the throttle servo. Test fit the servo
into the throttle servo mount.
! 4) Secure the tail wheel bracket in place
using two 3x25mm wood screws. Be careful
not to overtighten the screws.
Because the size of servos differ, you
may need to adjust the size of the precut
opening in the mount. The notch in the sides
of the mount allow the servo lead to pass
through.
! 3) Secure the servos with the screws provided with your radio system.
! 4) Install the pushrod throttle.
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Antenna wire.
Throttle.
Antenna.
ATTACHMENT WING-FUSELAGE.
INSTALLING THE BATTERY-RECEIVER.
Attach the aluminium tube into fuselage.
! 1) Plug the six servo leads and the switch
lead into the receiver. Plug the battery pack
lead into the switch also.
! 2) Wrap the receiver and battery pack in
the protective foam rubber to protect them
from vibration.
! 3) Route the antenna in the antenna tube
inside the fuselage and secure it to the bottom of fuselage using a plastic tape. See picture below.
Insert two wing panels as pictures below:
Tie wrap.
Receiver.
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YAK 54.
Instruction Manual.
sides under the horizontal stabilizer. If the tail
of the plane falls, the plane is tail heavy. To
correct this, move the battery and receiver forward orif this is not possible, stick weight onto
the firewall. When balanced correctly, the airplane should sit level or slightly nose down
when you lift it up with your fingers.
CONTROL THROWS.
!1) We highly recommend setting up the
YAK 54 using the control throws listed at right.
We have listed control throws for both Low
Rate (initial test flying/sport flying) and High
Rate (aerobatic flying).
Wing bolt.
!2) Turn on the radio system, and with the
trim tabs on the transmitter in neutral, center
the control surfaces by making adjustments
to the clevises or adjustable servo connectors.
The servo arms should be centered also.
! 3) When the elevator, rudder and aileron
control surfaces are centered, use a ruler and
check the amount of the control throw in each
surface. The control throws should be
measured at the widest point of each surface!
INITIAL FLYING/SPORT FLYING
Ailerons:
Elevator:
Rudder:
BALANCING.
!1) It is critical that your airplane be balanced correctly. Improper balance will cause
your plane to lose control and crash. The center of gravity is locate 7-8cm back from the
leading edge of the wing, measured at wing
tip.
!2) If the nose of the plane falls, the plane
is nose heavy. To correct this first move the
battery pack further back in the fuselage. If
this is not possible or does not correct it, stick
small amounts of lead weight on the fuselage
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5/8” up
1/2” down
3/4” up
3/4” down
2 1/2” right and left
AEROBATIC FLYING
Ailerons:
Elevator:
Rudder:
1” up
7/8” down
1 1/4” up
1 1/4”down
3 1/2” right and left
Do not use the aerobatic settings for
initial test flying or sport flying.
! 4) By moving the position of the adjustable control horn out from the control surface,
you will decrease the amount of throw of that
control surface. Moving the adjustable control horn toward the control surface will increase the amount of throw.
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FLIGHT PREPARATION.
PREFLIGHT CHECK.
! A) Check the operation and direction of
the elevator, rudder, ailerons and throttle.
!1) Completely charge your transmitter
and receiver batteries before your first day of
flying.
! B) Plug in your radio system per the
manufacturer's instructions and turn everything on.
! C) Check the elevator first. Pull back on
the elevator stick. The elevator halves should
move up. If it they do not, flip the servo reversing switch on your transmitter to change
the direction.
! D) Check the rudder. Looking from behind the airplane, move the rudder stick to the
right. The rudder should move to the right. If it
does not, flip the servo reversing switch on
your transmitter to change the direction.
! E) Check the throttle. Moving the throttle
stick forward should open the carburetor barrel. If it does not, flip the servo reversing switch
on your transmitter to change the direction.
! F) From behind the airplane, look at the
aileron on the right wing half. Move the aileron
stick to the right. The right aileron should move
up and the other aileron should move down. If
it does not, flip the servo reversing switch on
your transmitter to change the direction.
!2) Check every bolt and every glue joint
in the YAK 54 to ensure that everything is tight
and well bonded.
!3) Double check the balance of the airplane. Do this with the fuel tank empty.
!4) Check the control surfaces. All should
move in the correct direction and not bind in
any way.
!5) If your radio transmitter is equipped
with dual rate switches double check that they
are on the low rate setting for your first few
flights.
!6) Check to ensure the control surfaces
are moving the proper amount for both low
and high rate settings.
!7) Check the receiver antenna. It should
be fully extended and not coiled up inside the
fuselage.
!8) Properly balance the propeller. An out
of balance propeller will cause excessive vibration which could lead to engine and/or airframe failure.
We wish you many safe and enjoyable
flights with your YAK 54.
23
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