MEW GULL - Airtek Hobbies

PERCIVAL
MEW GULL
MS: SEA 98.
ASSEMBLY MANUAL
“Graphics and Specfications may change without notice”.
Specifications
Wingspan--------------------------------- 74 in ------------------------ 188cm.
Wing area-------------------------------- 797.2 sq.in ---------- 51.4 sq.dm.
Weight------------------------------------ 11lbs ---------------------- 4.5 -5 kg.
Length------------------------------------- 60.7 in ------------------- 154.3cm.
Recommended engine size---------- 1.20 cu.in ---------------- 2-stroke.
1.25-1.50----------------- 4-stroke.
Radio System required 6 channel with 6 digital servos.
Flying skill level Intermediate/advanced.
Kit features.
•
•
•
Ready-made—minimal assembly & finishing required.
Ready-covered covering.
Photo-illustrated step-by-step Assembly Manual.
Made in Vietnam.
PERCIVAL MEW GULL .
Instruction Manual.
INTRODUCTION.
Thank you for choosing the PERCIVAL MEW GULL ARTF by SEAGULL MODELS. The
PERCIVAL MEW GULL was designed with the intermediate/advanced sport flyer in mind. It is a
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. The motor mount
has been fitted and the hinges are pre-installed . Flying the PERCIVAL MEW GULL 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 PERCIVAL MEW GULL . 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.
1.20 cu.in
1.25 - 1.50
2-stroke
4-stroke engine
Radio System required 4 channels
with 6 digital servos
Propeller to suit engine
Protective foam rubber for radio
system
Silicone fuel line
TOOLS & SUPPLIES NEEDED.
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
2
PARTS LISTING.
FUSELAGE ASSEMBLY
(1) Fuselage
(1) Canopy
WING ASSEMBLY
(1) Right wing half/ aileron
(1) Left wing half with/ aileron
(1) Aluminium dihedral brace
Tail section assembly
(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 PERCIVAL MEW GULL 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.
Hinge
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.
T-pins.
Hinge.
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.
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.
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.
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.
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.
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.
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PERCIVAL MEW GULL .
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.
Instruction Manual.
AILERON CONTROL HORN
Aileron control horn installation: See pictures
below.
2 sets.
3x40mm.
CONTRONL HORN
M3 SCREW.
Note: Work the aileron up and down several
times to “work in” the hinges and check
for proper movement.
Epoxy.
ALUMINUM WASHER.
HINGING THE ELEVATOR.
Glue the elevator hinges in place using the
same tectniques used to hinge the ailerons.
HINGING THE RUDDER.
M3 LOCK
NUT.
ALUMINUM WASHER.
18mm .
Epoxy.
Glue the rudder hinges in place using the
same tectniques used to hinge the ailerons.
Wing
bottom.
Aileron control horn.
Hinge.
4
Aileron.
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ELEVATOR CONTROL HORN.
RUDDER CONTROL HORN.
Install the elevator control horn using the
same method as with the aileron control
horns.
Rudder control horn:
Using the same tectniques used aileron control
horn. See picture below.
2 sets.
2 sets.
3x50mm.
3x45mm.
CONTRONL HORN M3
CONTRONL HORN
.
M3 SCREW
ALUMINUM WASHER.
Aluminum Washer.
EPOXY.
Epoxy.
Horizontal
stabilizer
Elevator
Rudder
FUSELAGE
ALUMINUM WASHER.
Aluminum Washer.
M3 LOCK NUT.
M3 LOCK NUT.
EPOXY.
Horizontal
Stabilizer.
Elevator.
18mm.
EPOXY.
Rudder.
Fuselage.
18mm.
Rudder control horn.
Elevator control horn.
Hinge.
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PERCIVAL MEW GULL .
ENGINE MOUNT INSTALLATION.
see pictures below.Make yourself the
template of your engine on paper.
Instruction Manual.
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
4x30mm.
Mark and drill 4 holes for engine mount.
Insert 4 blind nuts to firewall.
Thread locker glue.
Balsa wood.
Vent tube.
Fuel pick up tube.
INSTALLING THE STOPPER ASSEMBLY.
Fuel fill tube.
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.
Carefully use a lighter or heat gun to
permenently set the angle of the vent 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.
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.
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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 3 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.
FUEL TANK INSTALLATION.
Vent tube.
Fuel pick-up tube.
Fuel fill tube.
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.
2 _ Electric Conversion (EP Power)
(OPTION).
Pictures and instruction will update soon .
1 _ Glow Engine.
INSTALLING THE BATTERY.
Battery.
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.
INSTALLING THE MAIN GEAR WIRES.
A.
Rubber band.
B.
Fuel tank.
1) Using a modeling knife, remove the
covering from over the two main gear mounting slots located in the bottom of the wing.
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PERCIVAL MEW GULL .
Instruction Manual.
2) Insert the 90º bend of one main gear
wire and support mounting block into the predrilled hole in one mounting slot.
Axle.
Wheel collar.
Remove
covering.
1.5mm.
M3 x 15mm.
Axle.
Wheel.
M3 x 10mm.
Wheel collar.
M8.
M3 x 10mm.
Landing gear.
8
M4 x 6mm.
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M3 x 10mm.
M3 x 10mm.
150mm.
M3 x 10mm.
4.2 mm diameter.
M3 x 10mm.
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.
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.
5) Bolt the engine to the engine mount using
the four machine screws. Double check that
all the screws are tight before proceeding.
6) Attach the Z-Bend in the pushrod wire to
the throttle arm on the carburetor.
Pushrod wire.
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.
Machine Screw M4x30mm.
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PERCIVAL MEW GULL .
Instruction Manual.
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.
COWLING INSTALLATION.
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.
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.
3) Install the muffler and muffler extension
onto the engine and make the cut out 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 3x10mm screws (4).
Trim and cut.
Machine Screw M3x10mm.
.
Trim and cut.
Trim and cut.
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SPINNER INSTALLATION.
Install the spinner backplate, propeller and
spinner cone.
Elevator servo .
Throttle servo .
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.
Rudder servo .
Elevator servo .
needle valve.
INSTALLING THE SWITCH.
Install the switch into the precut hole in the
side of fuselage.
Switch.
INSTALLING THE FUSELAGE SERVO.
THROTTLE SERVO ARM INSTALLATION.
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.
Install adjustable servo connector in the servo
arm .
Loctite secure.
Adjustable Servo
connector.
1) Install the rubber grommets and brass
collets onto the throttle servo. Test fit the servo
into the aileron servo mount.
2) Secure the servos with the screws provided with your radio system.
Servo arm.
1 PCS.
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PERCIVAL MEW GULL .
Instruction Manual.
Installing the aileron servo in place using the
same techniques used to flap servo.
Throttle servo arm.
Elevator servo.
Small weight.
String.
Rudder servo.
Aileron
Servo.
Elevator servo.
Electric wire.
INSTALLING THE AILERON SERVOS.
Servos.
Small weight.
Thread.
Wing.
Wing rib.
INSTALLING THE AILERON SERVOS.
Small Weight.
Small Weight.
String.
String.
Attach the string to the servo lead and carefully thread it though the wing.
AILERON PUSHROD HORN INSTALLATION
Wing.
85mm.
M3 clevis.
M3 lock nut.
Aileron.
110mm.
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Wing.
Aileron.
Wing.
Aileron.
Wing.
M3 lock nut.
Epoxy.
Aileron.
Repeat the procedure for the other wing.
WING ASSEMBLY.
NOTE: We highly recommend using 30
minute epoxy as it is stronger and provides
more working time, allowing the builder to
properly align the parts. Using fast cure epoxy
when joining the wing halves could result in the
glue drying before the wing halves are aligned
properly which may result in failure of the wing
centre section during flight.
2) Remove the brace when satisfied with its
fit in each wing half. Coat both sides of one half
of the dihedral brace with 30 minute epoxy.
Next, pour some epoxy into the dihedral box in
one wing panel. Make sure you cover the top
and bottom as well as the sides of the dihedral
brace. Use enough epoxy to fill any gaps.
1) Test fit the wing tube into each wing half.
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.
Masking tape.
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PERCIVAL MEW GULL .
Instruction Manual.
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.
INSTALLING VERITICAL FIN.
Masking tape.
1) Remove the covering as picture shown
below.
3) Peel off the backing from the self adhesive covering strip. Apply the strip to the centre
section of the wing starting from the bottom
trailing edge. Wrap the strip all the way around
the wing until it meets the trailing edge again.
Trim off any excess strip.
MOUNTING THE TAIL WHEEL.
Hinge.
See pictures below.
Masking tape.
Cut.
M3 x 25mm.
Remove the covering.
M3 x 25mm.
14
Epoxy.
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Cut.
Epoxy.
Epoxy.
Epoxy.
Epoxy.
Covering strip.
Hinge.
Hinge slot.
C/A glue.
2) 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. Put 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.
INSTALLING HORIZONTAL FIN.
1) Remove the covering as same as
pictures shown below.
2) Sand the aluminium tube using
sandpaper. This will improve the bond of the
epoxy to the cardboard horizontal fin.
Coat both sides of one half of the aluminium
tube with 30 minute epoxy. Next, pour some
epoxy into the cardboard horizontal fin. Use
enough epoxy to fill any gaps.
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PERCIVAL MEW GULL .
Instruction Manual.
Epoxy.
3) Insert aluminium tube into the cardboard
of fuselage.
Aluminium tube.
3 x 70mm.
Epoxy.
Cut.
4) Slide the two horizontal fin halves together and carefully align them at the possition
on the fuselage. Wipe away any excess epoxy
using paper towels.
Fill epoxy.
Epoxy.
Epoxy.
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Rudder control horn.
Elevator control horn.
ELEVATOR - RUDDER PUSHROD HORN
INSTALLATION.
M2 clevis.
1) Elevator and rudder pushrods assembly
follow pictures below.
M2 Lock nut.
Attach to elevator - rudder control horn.
Attach to servo arm in fuselage.
Throttle.
Rudder.
Elevator.
Control horn.
Metal clevis.
M2 lock nut.
Elevator pushrod.
Elevator Pushrod.
Rudder pushrod.
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PERCIVAL MEW GULL .
Instruction Manual.
2) Install servos arm to servos. Notice the
position of the servo arms on the servos. See
picture below.
Elevator.
C/A glue.
A.
Throttle.
Rudder.
INSTALLING THE RECEIVER.
Elevator.
1) Plug the 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.
A.
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.
Receiver.
A.
Epoxy.
Tie Wrap.
Antenna.
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ATTACHMENT WING - FUSELAGE.
Bolt the wing to fuselage.
CONTROL THROWS.
1) We highly recommend setting up the
PERCIVAL MEWGULL using the control
throws listed at right. We have listed control
throws for Low Rate (initial test flying/sport flying) (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.
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 located 70mm back from the leading edge of the wing, measured at the 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 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 or if this is not possible, stick weight
onto the firewall or use a brass heavy hub spinner hub.
When balanced correctly, the airplane should
sit level or slightly nose down when you lift it
up with your fingers.
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:
10mm” up 10mm” down.
10mm” up 10mm” down.
15mm” right 15mm” left.
AEROBATIC FLYING
Ailerons: 15mm” up 15mm” down.
Elevator: 15mm” up 15mm” down.
Rudder: 20mm” right 20mm” 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.
FLIGHT PREPARATION.
A) Check the operation and direction of
the elevator, rudder, ailerons and throttle.
B) Plug in your radio system per the
manufacturer's instructions and turn everything on.
70mm
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.
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PERCIVAL MEW GULL .
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.
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.
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.
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 PERCIVAL MEW GULL to ensure that
everything is tight and well bonded.
20
Instruction Manual.
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 PERCIVAL MEW GULL .
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