Seagull Models Boomerang 40 User manual

Specifications
Wingspan _____________________________ 155cm.
Wing area _________________________ 3950 sq cm .
Approximate flying weight_______________ 2.6-2.8kg.
Recommended engine size 0.40-0.46 cu. ins 2-stroke.
Recommended R/C ___________ 4 channel minimum.
Flying skill level___________________ Sports Trainer.
Kitfeatures.
• Ready-made—minimalassembly&finishingrequired.
• Ready-covered—includingdecals,trim&covering.
• Factory-installedpushrod.
• Factory-pinned&gluedcontrolsurfacehingesforultimatesafety.
• Comprehensivehardwarepackincludingwheels,tank,spats,undercarriage& spinner.
• Photo-illustratedstep-by-stepAssemblyManual.
Hand-made Almost Ready to Fly R/C Model Aircraft
ASSEMBLY MANUAL
Additionalitemsrequired.
Engine.
4 Channel or greater Radio Control system.
Glues.
Tools.
Starting Equipment.
MadeinVietnam.
SPORTS TRAINER - ENGINE SIZE.40 - .46 - 2STROKE

2
BOOMERANG 40. Instruction Manual.
INTRODUCTION.
ThankyouforchoosingtheBoomerang40ARTFbySEAGULLMODELS.TheBoomerang40was
designed with the sports trainer flyer in mind. It is a High-wing aeroplane which is easy to fly and
quick to assemble. The airframe is conventionally built using balsa, plywood and veneer 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. The pushrods are pre-made to the correct
lengths, the motor mount has been fitted and the hinges are pre-installed and pinned for security.
Flying the Boomerang 40 is simply a joy.
This instruction manual is designed to help you build a great flying aeroplane. Please read this
manual throughly before starting assembly of your Boomerang 40 . 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.
IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier
and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training
proceduresdesignedtohelpthenewpiloton his wayto successful R/C flight.They will also beable
to advise on any insurance and safety regulations that may apply.
ADDITIONAL ITEMS REQUIRED.
- .40-.46 2-stroke engine.
- 4 channel radio with four servos.
- Glow plug to suit engine.
- Propeller to suit engine.
- Protective foam rubber for radio
system.
- Silicone fuel line.
- Stick-on weights for balance
(If necessary).
TOOLS & SUPPLIES NEEDED.
- Thick cyanoacrylate glue.
- 30 minute epoxy.
- 5 minute epoxy.
- Hand or electric drill.
- Assorted drill bits.
-Modellingknife.
- 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.
PARTS LISTING.
FUSELAGE ASSEMBLY
- (1) Fuselage.
- (1) Pre-installed throttle pushrod &
tube.
- (1) Pre-installed servo tray.
- (1) Pre-installed motor mount.
- (1) Pre-installed rudder pushrod.
- (1) Pre-installed elevator pushrod.
WING ASSEMBLY
- (1) Right wing half with pre-
installedaileron.
- (1) Left wing half with pre-installed
aileron.
- (1) Plywood wing dihedral brace.
- (1) Covering strip for centre
section joint.
TAIL SECTION ASSEMBLY
- (1) Vertical stabilizer with pre-
installedrudder.
- (1) Horizontal stabilizer with pre-
installedelevatorhalves.

3
BOOMERANG 40. Instruction Manual.
NOTE:To avoid scratching your new aero-
plane we suggest that you cover
your workbench with an old towel.
Keepacoupleofjarsorbowlshandy
toholdthesmallpartsafteryouopen
the bags.
Please trial fit all parts. Make sure
you have the correct parts and that
they fit and are aligned properly be-
fore gluing! This will ensure proper
assembly as the Boomerang 40 is
made from natural materials and
minor adjustments may have to be
made.
The paint and plastic parts used in
thiskit arefuel proof.However, they
arenottolerantofmanyharshchemi-
cals including the following: paint
thinner, cyano-acrylate glue accel-
erator,cyanoacrylategluede-bonder
andacetone.Donotletthesechemi-
calscomeincontactwiththecolours
onthecoveringandtheplasticparts. Masking tape.
Centreline.
2) Remove the brace when satisfied with
its fit ineach wing half. Coat both sides of one
halfofthedihedralbracewith30minuteepoxy.
Next,poursomeepoxyintothedihedralboxin
one wing panel. Make sure you cover the top
andbottomaswellasthesidesofthedihedral
brace. Use enough epoxy to fill any gaps.
 1)Testfitthewingtubeintoeachwinghalf.
The brace should slide in easily up to the
centreline that you drew.If not, use 220 grit
sandpaper with a sanding block and sand
down the edges and ends of the brace until it
fits properly.
WING ASSEMBLY.
NOTE: We highly recommend using 30
minute epoxy as it is stronger and provides
more working time, allowing the builder to
properlyaligntheparts.Usingfastcureepoxy
whenjoiningthewinghalvescouldresultinthe
gluedryingbeforethewinghalvesarealigned
properlywhichmayresultinfailureofthewing
centre section during flight.
Carefully slide the two wing halves together
and firmly press them together, allowing the
excess epoxy to run out. There should not be
any gap in the wing halves. Use rubbing
alcohol and a paper tower to clean up any
excess epoxy.
Apply masking tape at the wing join to hold
the wing halves together securely.
Expoxy.

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BOOMERANG 40. Instruction Manual.
Epoxy attach.
4. Once the epoxy has cured, trial fit
both wing halves together. The centre ribs
shouldfittogetherflushwithnogaps.Ifgapsdo
exist, use 220 grit sandpaper and sand down
the high spots on the root ribs and the wing
joineruntilaproperfitisachieved.Thecorrect
amountofdihedralisready-builtintothewings.
With one wing half laid flat on the table, the
other wing tip should be off the table surface.
If this needs to be adjusted, you may do so by
sandingsmallamounts fromthecentreribs or
dihedral brace.
5. Carefullyapplymaskingtapearound
thetopandbottomedge of theroot rib ofeach
winghalftoprotectthemfromdamagecaused
byepoxy.
6. Mixagenerousamountof30minute
epoxy. Coat the exposed half of the dihedral
brace, and the remaining wing joiner box and
both root ribs with epoxy. Slide the two wing
halvestogetherandcarefullyalignthematthe
leading and trailing edges. Wipe away any
excess epoxy using paper towels. Use mask-
ingtapewrappedaroundthecentresectionto
hold the halves in place until the epoxy cures.
1. Installtherubber grommetsand brass
colletsontothe aileron servo. Testfit theservo
into the aileron 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.
2. Remove the aileron servo. Place the
mountonto thewing,aligning thecutout inthe
mount with the cutout in the wing. The two
notches in the mount should face the leading
edge of the wing.
3. While holding the servo mount firmly
in place, trace around it using a pen.
4. Remove the mount, and using a mod-
elingknife, carefully removethe covering from
inside the outline you drew.
5. Using 6 Minute Epoxy, glue the servo
mount into place. Remove any excess epoxy
usinga papertowel andrubbing alcohol. Use
piecesofmaskingtape to holdthetrayinplace
until the epoxy fully cures.
INSTALLING THEAILERON SERVO MOUNT.
Servo tray.
 3) Peel off the backing from the self adhe-
sivecoveringstrip.Applythestriptothecentre
section of the wing starting from the bottom
trailingedge.Wrapthestripallthewayaround
the wing until it meets the trailing edge again.
Trim off any excess strip.
8. Peel off the backing from the self
adhesive covering strip. Apply the strip to the
centre section of the wing starting from the
bottomtrailingedge.Wrapthestripalltheway
aroundthewinguntilit meets thetrailing edge
again. Trim off any excess strip.
7. When the epoxy has cured, carefully
remove the masking tape from the wing.

5
BOOMERANG 40. Instruction Manual.
INSTALLING THE AILERON SERVO.
Install the aileron servo into the servo
mount, withthe outputshaft towards thelead-
ing edge of the wing, using the wood screws
provided with your radio system. Drill 1/16”
pilot holes through the mount before installing
the screws. This will prevent the wood from
splitting.
INSTALLING THEAILERON LINKAGE.
1. Thread one nylon adjustable control
horn onto each aileron torque rod. Thread
the horns on until they are flush with the ends
of the torque rods.
2. Thread one nylon clevis at least 5/16”
onto each of the two threaded wires.
3. Withthe aileronservocentered, install
theservo armontothe servo. Thearmshould
beinstalledsoitisparallelwiththetrailingedge
of the wing.
1. Using a modeling knife, remove the
covering from over the two main gear mount-
ingslots locatedin thebottomof thefuselage.
2. Usingthetwo landinggear straps asa
guide, mark the locations of the four 3mm x
12mmmountingscrews onto thefuselagesur-
face.
Remove covering.
4. Slide the pushrod wires following pic-
tureabove.
Connector.
Pushrod
wire.
C/Aglue fix.
5. With both the aileron servo and the ai-
leronscentered.Tighten thesetscrews onthe
connectors.
INSTALLING THE MAIN GEAR WIRES.
3. The landing gear wire is held in place
using two nylon landing gear straps and four
3mm x 12mm wood screws.
The strapsshould be locatedequal distance
from the inside and outside ends of the wire.
5. Remove the two straps and the gear
wire. Drill four 3/32” pilot holes into the fuse-
lage for the wood screws.
Plastic trap.
Pen.
4. Insert the main gear wire into the
mounting slot.

6
BOOMERANG 40. Instruction Manual.
2mm.
NOSE GEAR INSTALLATION.
3mm X 12mm.
Installing steering arm as follow.
Adjust the nose gear steering arm until the
arm is parallel with the fire wall.
FUEL TANK.
Steering arm.
Pushrod wire.
Steering arm.
TOOLSREQUIRED
INSTALLING THE STOPPERASSEMBLY.
1. Using a modeling knife, carefully cut
offthe rearportionofone ofthetwonylontubes
leaving 1/2” protruding from the rear of the
stopper. This will be the fuel pick up tube.
2. Usingamodeling knife,cut one length
ofsilicon fuelline (not included)to 2-1/4”long.
Connect one end of the line to the weighted
fuel pickup and the other end to the nylon
pickup tube.
3. Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.

7
BOOMERANG 40. Instruction Manual.
4. Carefully heat the vent tube using a
heat gun or lighter to permanently set the
angle of the tube.
FuelPickup
Tube.
FuelFill Tube.
Venttube.
When the stopper assembly is installed in
the tank, the top of the vent tube should rest
justbelowthe top surfaceof thetank. Itshould
not touch the top of the tank.
5. 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.
6. With the stopper assembly in place,
the weighted pickup should rest about 3/8”
awayfromthe rearofthetank andmovefreely
insidethetank. Thetopoftheventtube should
rest just below the top of the tank. It should
not touch the top of the tank.
7. When satisfied with the alignment of
thestopperassemblytightenthe3mmx20mm
machine screw until the rubber stopper ex-
pands and seals the tank opening. Do not
overtighten the assembly as this could cause
the tank to split.
Fuel pickup tube.
Top of tank.
Vent tube.
Fuel fill tube.
Pull.
INSTALLING THE FUEL TANK.
Pushrod wire.
Plastic tape.

8
BOOMERANG 40. Instruction Manual.
Fueltank.
MOUNTING THE ENGINE.
PARTSREQUIRED.
1. Install the pushrod housing through the
predrilledholein thefirewalland into theservo
compartment. The pushrod housing should
protrude 1/4" out past the front of the firewall.
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.
4. Remove the engine. Using an drill bit,
drill the mounting holes through the engine
mount at the four locations marked.
5. Bolt the engine to the engine mount
using the four machine screws. Double
cheek that all the screws are tight before
proceeding.
6. Attach the Z-Bend in the pushrod wire
to 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, reattach the throttle arm to the car-
buretor.
3. When you are satisfied with the align-
ment, mark the locations of the engine
mounting.
2. Use pieces off foam rubber to hold the
tank in place. Be careful the tank or the foam
doesn’t interfere with the pushrods. Cut the
fuel line in the middle of the loop. Keep track
of which one is for the fuel pick-up and which
one is for the muffler pressure.
Blow throughthe tubestomake surethe
lines have not become kinked during
installation.
110mm.
3mm X 25mm.
2.5mm.
Pushrod wire.
Fuelpickup
tube.
Vent tube.
Fuel fill tube.

9
BOOMERANG 40. Instruction Manual.
Install the switch into the precut hole in the
servo tray, in the fuselage, from the bottom.
Use the two screws provided with the switch
to secure it in place. Drill two 3/32” holes
through the tray for the screws to pass
through.
INSTALLING THE SWITCH.
Install the spinner backplate, propeller and
spinner cone. The spinner cone is held in
place using two 3mm x 12mm wood screws.
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 THE SPINNER. INSTALLINGTHEFUSELAGESERVOS.
The top of the stabilizer does not have
the hinge pins exposed.
2. Using a modeling knife, carefully re-
move the covering from over the vertical sta-
bilizermounting slotin thetopof thefuselage.
3. Slidethestabilizer into placein thepre-
cut slot in the rear of the fuselage. The stabi-
lizer should be pushed firmly against the front
of the slot.
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 tri-
angleandextend thismark,fromback tofront,
across the top of the stabilizer. Also extend
this mark down the back of the trailing edge
of the stabilizer.
Draw centerline.
Remove covering.
Switch.
Elevator servo.
Rudder servo.
Throttle servo.

10
BOOMERANG 40. Instruction Manual.
1. Slidethevertical stabilizerinto theslot
inthe topof thefuselage. The bottom edgeof
the stabilizer should also be firmly pushed
against the top of the horizontal stabilizer.
2. 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.
5. Removethe stabilizer. Usingthe lines
youjust drewas aguide,carefully removethe
covering from between them using a model-
ing knife. VERTICAL STABILIZER
INSTALLATION.
6. Using a modeling knife, carefully re-
move the covering that overlaps the stabilizer
mounting platform sides in the fuselage. Re-
move the covering from both the top and the
bottom of the platform sides.
When cutting through the covering to re-
move it, cut with only enough pressure
toonly cutthrough the coveringitself. Cutting
into the balsa structure may weaken it.
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
topand bottomofthe stabilizermounting area
and to the stabilizer mounting platform sides
8. After the epoxy has fully cured, re-
move the masking tape orT-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.
in the fuselage. Slide the stabilizer in place
and realign. Double check all of your mea-
surementsonce more beforetheepoxy cures.
Holdthestabilizerin place withT-pinsormask-
ing tape and remove any excess epoxy using
a paper towel and rubbing alcohol.
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.
Pen.
Remove covering.

11
BOOMERANG 40. Instruction Manual.
3. Remove the stabilizer. Using a mod-
eling knife, remove the covering from below
the lines you drew. Also remove the covering
from the bottom edge of the stabilizer and the
bottomandtop edgesof thefillerblock. Leave
the covering in place on the sides of the filler
block.
When cutting through the covering to re-
moveit, cut with only enoughpressure toonly
cut through the covering itself. Cutting into
the balsa structure may weaken it.
4. Slide the vertical stabilizer back in
place. Using a triangle, check to ensure that
thevertical stabilizeris aligned 90ºto thehori-
zontal stabilizer.
5. When you are sure that everything is
aligned correctly, mix up a generous amount
ofFlash30MinuteEpoxy. Apply athin layerto
themounting slotinthe topofthe fuselageand
to the sides and bottom of the vertical stabi-
lizer mounting area. Apply epoxy to the bot-
tom and top edges of the filler block and to
90º
Vertical
Stabilizer.
Horizontal
Stabilizer.
thelower hingealso. Setthestabilizerin place
andrealign. Doublecheckallofyourmeasure-
mentsoncemorebeforetheepoxycures.Hold
the stabilizer in place with T-pins or masking
tape and remove any excess epoxy using a
papertoweland rubbing alcohol. Allowthe ep-
oxy to fully cure before proceeding.
Remove covering.
ControlHorn.
MountingScrews. Mounting Plate.
CONTROL HORN INSTALLATION.
1. Locate the two nylon control horns, two
nylon control horn backplates and four M2 x
20mm machine screws.
2. Position the elevator horn on the bottom
side of elevator. The clevis attachment holes
should be positioned over the hinge line.
3. Using a 1.5mm drill bit and the control
horns as a guide, drill the mounting holes
through the elevator halves.
(2)2mm x 20mm.
Pen.

12
BOOMERANG 40. Instruction Manual.
4. Install the rudder control horn using the
same method as with the elevator control
horns.
PUSHROD INSTALLATION.
Rudder
control horn.
2. Thread two nylon clevises onto the
threaded wires at least 10 turns. Attach the
clevises to the elevator and rudder control
horns. You may find it necessary to make
slightbends inthe wiresso they willalign with
the control horns without binding.
1. Installtheelevatorpushrod intothe fuse-
lage.To help make installation easier, thread
stringdown throughthe elevatorpushrod ex-
its and into the servo compartment in the fu-
selage.Tiethe thread tothethreaded pushrod
wiresoftheelevatorpushrod.Pullthepushrod
through the exit slots.
Cut.
Sanding.
Cut.
Sanding.
Elevator control horn.
Control horn.
Elevatorpushrod.

13
BOOMERANG 40. Instruction Manual.
THROTTLE SERVO INSTALLATION.
1. Install adjustable servo connector in the
servo arm.
Adjustableservoconnector.
Servoarm.
C/Aglue fix.
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.
2. Installtherubber grommetsand brass
colletsonto thethrottle servo. Testfit the servo
into the aileron servo mount.
3. Secure the servos with the screws pro-
vided with your radio system.
4. Install the pushrod throttle.
2. Slide one 60mm diameter wheel onto
eachaxleand pushthem upagainstthe wheel
collars. Slidethe remainingwheelcollars with
3mm x 6mm set screws onto the axles. Push
them up against the wheels and tighten the
INSTALLING THE MAIN GEAR WHEELS.
1. Slide one wheel collar with 3mm x
6mm set screw onto each axle. Push the
wheel collars on as far as they will go and
tighten the set screws.
Be careful not to overtighten the set
screws. Overtightening may cause the
threads to strip.
notbind in anyway. If they dobind,loosen the
setscrewsinthe outerwheel collarsand move
the collars out a small amount. Retighten the
set screws.
Slide one 60mm diameter wheel onto the
axle and push them up against the wheel col-
lars. Slide the remaining wheel collars with
3mm x 6mm set screws onto the axles. Push
them up against the wheels and tighten the
set screws. The wheels should spin free and
INSTALLING THE NOSE GEAR WHEEL.
set screws. The wheels should spin free and
notbind in anyway. If they dobind,loosen the
setscrewsinthe outerwheel collarsand move
the collars out a small amount. Retighten the
set screws.
Rudder pushrod.
Elevator.
Rudder. Steering pushrod.
Throttle.

14
BOOMERANG 40. Instruction Manual.
Antenna Rubber
Band
Modified
ServoArm
Cut
ATTACHMENT WING-FUSELAGE.
1. Plug the four 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. Position the battery pack in the fuel tank
compartment and the receiver just behind the
fueltank . Use extrafoam piecestohold them
inposition.
When balancing the airplane you may
need to move the battery or receiver for-
ward or after to achieve proper balance.
4. Using a 1/16” drill bit, drill a hole through
the side of the fuselage, near the receiver, for
the antenna to exit. Route the antenna out of
the fuselage and secure it to the vertical stabi-
lizer using a rubber band and a modified servo
arm. See picture as below.
INSTALLING THE RECEIVERAND BATTERY. See pictures below:
Dowel.

15
BOOMERANG 40. Instruction Manual.
1. It is critical that your airplane be bal-
anced correctly. Improper balance will cause
yourplane to losecontroland crash. Thecen-
ter of gravity is located 7.5cm - 8.5cm behind
the leading edge of the wing.
BALANCING.
2. If the nose of the plane falls, the plane is
noseheavy. To correctthis firstmove thebat-
terypack furtherbackin thefuselage. Ifthis is
not possible or does not correct it, stick small
amounts of lead weight on the fuselage sides
underthe horizontalstabilizer. If the tailof the
plane falls, the plane is tail heavy. To correct
this,movethe battery andreceiverforwardorif
this is not possible, stick weight onto the
firewallor useabrass heavyhub spinnerhub,
similarto those offeredby HarryHigley. When
balancedcorrectly, the airplaneshould sitlevel
or slightly nose down when you lift it up with
your fingers.
CONTROL THROWS.
2. Turnon theradio system,and withthe
trim tabs on the transmitter in neutral, center
the control surfaces by making adjustments
totheclevises oradjustableservoconnectors.
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 sur-
face!
4. By moving the position of the adjust-
able control horn out from the control surface,
you will decrease the amount of throw of that
control surface. Moving the adjustable con-
trol horn toward the control surface will in-
crease the amount of throw.
1. We highly recommend setting up the
Boomerang 40 usingthe controlthrowslisted
atright. We have listedcontrolthrows forboth
initial test flying/sport flying and aerobatic fly-
ing.
INITIALFLYING/SPORT FLYING
Ailerons: 3/8” up 3/8” down
Elevator: 3/8” up 3/8” down
Rudder: 1/2” right 1/2” left
AEROBATICFLYING
Ailerons: 1/2” up 1/2”down
Elevator: 5/8” up 5/8”down
Rudder: 1” right 1” left
Do not use the aerobatic settings for ini-
tial test flying or sport flying.
E) Check the throttle. Moving the
throttle stick forward should open the carbu-
retor barrel. If it does not, flip the servo re-
versing switch on your transmitter to change
the direction.
FLIGHT PREPARATION.
C) Check the elevator first. Pull back
on the elevator stick. The elevator halves
shouldmove up. Ifitthey donot,flip theservo
reversingswitchon yourtransmitterto change
the direction.
D) Check the rudder. Looking from
behind the airplane, move the rudder stick to
theright. The rudder shouldmove to theright.
Ifit doesnot,flip theservo reversing switchon
your transmitter to change the direction.
A) Check the operation and direction
of the elevator, rudder, ailerons and throttle.
B) Plug in your radio system per the
manufacture’sinstructionsandturneverything
on.

16
BOOMERANG 40. Instruction Manual.
PREFLIGHT CHECK.
1) Completely charge your transmitter
and receiver batteries before your first day of
flying.
2) Check every bolt and every glue joint
in the Boomerang 40 to ensure that every-
thing is tight and well bonded.
3) Double check the balance of the air-
plane. Do this with the fuel tank empty.
4) Checkthe controlsurfaces. All should
move in the correct direction and not bind in
any way.
5) If your radio transmitter is equipped
withdual rateswitchesdouble checkthat 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.
We wish you many safe and enjoy-
able flights with your BOOMERANG 40.
8) Properlybalance thepropeller. Anout
of balance propeller will cause excessive vi-
bration which could lead to engine and/or air-
frame failure.
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 re-
versing switch on your transmitter to change
the direction.