Seagull Models ERCOUPE User manual

Specifications:
Wingspan------------------------------98.4in(250cm).
Wingarea----------------1576.4sq.in(101.7sqdm).
Weight----------------------13.2-15.4lbs(6.0-7.0kg).
Length------------------------------67.3in(171.0cm).
Engine -----------------------------33-40cc.
Radio-------------------6channelswith7 servos.
“Graphics and specifications may change without notice”.
MS:176
ASSEMBLY MANUAL

ERCOUPE Instruction Manual.
2
5
INTRODUCTION.
Thank you for choosing the ERCOUPE ARTF by SEAGULL MODELS COMPANY LTD. The
ERCOUPE was designed with the intermediate/advanced sport flyer in mind. It is a semi scale
airplane whichiseasytoflyandquicktoassemble.Theairframeisconventionallybuiltusingbalsa,
plywoodto makeitstrongerthan theaverageARTF, yetthedesignallows theaeroplanetobe 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 ERCOUPE 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 ERCOUPE. 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
proceduresdesigned tohelpthenew pilotonhis waytosuccessfulR/C flight.Theywillalso beable
to advise on any insurance and safety regulations that may apply.
KIT CONTENTS
3
1
2
2
4
3
8
6
7
9
9
10
11

3
www.seagullmodels.com
ADDITIONAL ITEMS REQUIRED..
Engine 33cc-40cc.
Computer radio with 7servos.
Glow plug to suit engine.
Propeller to suit engine.
Protective foam rubber for radio
system.
Siliconefuel line.
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.
KIT CONTENTS.TS
1 Fuselage
2 Wing Set
3 Tail Set
4 Cowling
5 Main Landing Gear
6 Wing Tube
7 Hardware Set
8 Fiberglass Wheel Pants
9 Canopy
10 Pilot
11 Fuel Tank
Aileroncontrolhorn.
INSTALL THE AILERONS CONTROL
HORN.
1) Locate the hardware necessary to install
the control horns for the ailerons.
Fiberglass control horn.
2)Position the Control horn on the Aileron
and use 30-minute Epoxy
Epoxy.
Install the elevator control horn using the
same method as same as the aileron control
horns.
INSTALL ELEVATOR CONTROL HORN.
Fiberglass control horn.

ERCOUPE Instruction Manual.
4
AdjustableServo
connector.
Servoarm.
Loctite secure.
1PCS.
INSTALLING THE FUSELAGE SERVOS.
Throttle servo.
1) Installtherubber grommets and brass
colletsonto the throttle servo. Testfit theservo
into the aileron servo mount.
 2) Secure the servos with the screws pro-
vided with your radio system.
Because the size of servos differ, you
mayneed to adjustthesizeofthe precut open-
ing in the mount. The notch in the sides of the
mount allow the servo lead to pass through.
THROTTLE SERVO ARM INSTALLATION.
Installadjustableservoconnectorin the servo
arm as same as picture below:
Ruddercontrol horn.
Epoxy.
Elevator control horn.
Position the Control horn on the Aileron and
use 30-minute Epoxy
INSTALL RUDDER CONTROL HORN.
Repeatsteps to install the ruddercontrol horn
as same as steps done for ailerons.
Fiberglass control horn.
Epoxy.
Nose Retractable servo.

5
www.seagullmodels.com
Throttleservoarm.
3/32” Hole.
INSTALLING THE SWITCH.
Installtheswitchintotheprecutholeinthe
side, in the fuselage.
Trimand cut.
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.
INSTALLING THE STOPPER ASSEMBLY.
2) Usingamodeling knife, cut one length
ofsiliconfuelline. Connectoneendoftheline
totheweighted fuel pick up and the other end
to the nylon pick up tube.
Nose Retractable servo arm.
Venttube. Fuel pick up tube.
Fuel fill tube.
Switch

ERCOUPE Instruction Manual.
6
5) With the stopper assembly in place,
the weighted pick-up should rest away from
therear 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 ex-
pands and seals the tank opening. Do not
overtighten the assembly as this could cause
the tank to split.
3) Carefully bend the second nylon tube
up at a 45º angle. This tube is the vent tube.
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.
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
thetankis installed inside the fuselage, it may
be difficult to determine which is which.
FUEL TANK INSTALLATION.
 7) Slide the fuel tank into the fuselage. Guide
the lines from the tank through the hole in the
firewall.
Fueltank.
 8) Use plywood template to hold in place
the fuel tank with C/A glue to secure the fuel
tank inside the fuselage.
C/Aglue. Blow through one of the lines to en-
sure the fuel lines have not become kinked
inside the fuel tank compartment. Air
should flow through easily.
Venttube.
Fuel pick up tube.
Fuel fill tube.
9) Connect the lines from the tank to the engine
and muffler. The vent line will connect to the
muffler and the line from the clunk to the
carburetor.

7
www.seagullmodels.com
MOUNTING THE ENGINE.
5 x 80 mm
5x80mm.
Screw.
150mm
5.2mm

ERCOUPE Instruction Manual.
8
NOSE LANDING GEAR
INSTALLTION.
1)Locatetheitems necessary to attach the
nose landing gear that are included with your
model.
2)Installnoselandinggear andwheel pant.
Thread locker glue.
Screw.
M3x25mm.
Drillhole.
Screw.
Screw.
5.2mm

9
www.seagullmodels.com
3)Install nose landing gear at the top
Fuselage.
Axle.
wheel collar
wheel
Screw.
3)Install nose landing gear at the top
Fuselage.

ERCOUPE Instruction Manual.
10
Becauseofthesizeofthecowl,itmaybe nec-
essarytouse a needle valve extension for the
highspeedneedlevalve. Makethisoutof suf-
ficient length 1.5mm wire and install it into the
end of the needle valve. Secure the wire in
placebytightening the set screw in the side of
the needle valve.
Trim and cut.
COWLING.
1)Slidethefiberglasscowl over the engine
and line up the back edge of the cowl with the
marksyoumade on the fuselage then trimand
cut as shown.
1
2
Crimp.
Cableend. M3

11
www.seagullmodels.com
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.
Machine screw M3x10mm.
 3) Installthemuffler 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 fuse-
lage using the M3x10mm screws.
2) While keeping the back edge of the
cowl flush with the marks, align the front of
thecowl with thecrankshaftofthe engine. The
front of the cowl should be positioned so the
crankshaft is in nearly the middle of the cowl
opening.Use thespinnerbackplate asaguide.
Hold the cowl firmly in place using pieces of
masking tape.
INSTALLING THE AILERON - FLAPSERVOS.

ERCOUPE Instruction Manual.
12
6) Secure the servo to the aileron hatch using
Phillips screwdriver and the screws provided
with the servo.
7) Apply 1-2 drops of thin C/A to each of the
mounting tabs. Allow the C/A to cure without
using accelerator.
Servos. Smallweight.
Thread.
1) Usingasmallweight (Weighted fuelpick-up
workswell) and string, feed the string through
the wing as indicated.
Because the size of servos differ, you
mayneed toadjustthe sizeofthe precutopen-
ing in the mount. The notch in the sides of
themountallowtheservoleadtopassthrough.
String.
Small weight.
2) Place the servo between the mounting
blocksand spaceitfromthehatch.Useapencil
to mark the mounting hole locations on the
blocks.
3) Use drill bit in a pin vise to drill the mouting
holes in the blocks.
4) Apply 2-3 drops of thin C/A to each of the
mounting holes.Allow the C/A to cure without
using accelerator.
5) Use dental floss to secure the connection
so they cannot become unplugged.

13
www.seagullmodels.com
9) Set the aileron hatch in place and use a
Phillips screw driver to install it with four wood
screws.
8) A string has been provided in the wing to
pull the aileron lead through to the wing root.
Remove the string from the wing at the servo
location and use the tape to attach it to the
servoextensionlead.Pulltheleadthroughthe
wing and remove the string. 2x10
Wing. M3lock nut.
90mm.
Aileron.
AILERONPUSHRODHORNINSTALLATION

ERCOUPE Instruction Manual.
14
LANDING GEAR INSTALLTION.
1)Locatetheitems necessary to attach the
landinggear that areincludedwithyour model.
1)Locatetheitems necessary to attach the
landinggear that areincludedwithyour model. 2 mm
M3 X 25 mm
Thread locker glue
Epoxy
Epoxy

15
www.seagullmodels.com
5.2mm
5.2mm
Thread locker glue
3x10mm
2mm

ERCOUPE Instruction Manual.
16
TAIL SET INSTALLTION. ATTACHMENT TAIL SET-FUSELAGE.
Epoxy
Epoxy

17
www.seagullmodels.com
M2 lock nut.
M2clevis.
40mm.
.
 4) Elevatorandrudderpushrods assembly
as pictures below.
 3) Thread one clevis and M3 lock nut on
toeachelevatorcontrolrod. Thread the horns
onuntiltheyareflushwiththeendsofthecon-
trol rods.
Elevator pushrod.
2 pcs.
Elevator control horn.
ELEVATOR PUSHROD HORN
INSTALLATION.
 1) Install the elevator control horn using
the same method as with the aileron control
horns.
 2) Position the elevator control horn on
the both side of elevator.
Control horn.
M2lock nut.
Metalclevis.
Elevator pushrod.
ELEVATOR PUSHROD HORN
INSTALLATION.
M2 lock nut.
M2clevis.
50mm.
Rudder pushrod.
1 pcs.
4x45mm

ERCOUPE Instruction Manual.
18
- Apply a bead of canopy glue around the inside
edge of the canopy. Position the canopy onto
the hatch. Use tape to hold the canopy secure
until the glue fully cures.
2) If all the decals are not precut, please use
scissors or a sharp hobby knife to cut the
decals from the sheet. Please be certain the
model is clean and free from oily fingerprints
and dust. Position decal on the model where
desired, using the photos on the box and aid
in their location.
4) Position the canopy onto the fuselage. Trace
around the canopy and onto the fuselage using
a felt-tipped pen.
APPLY THE DECALS.
1) If all the decals are precut and ready to
stick.Pleasebecertainthe model is clean and
free from oily fingerprints and dust. Position
decal on the model where desired, using the
photos on the box and aid in their location.
Epoxy.
C/Aglue.
M2x6mm.
3) Position the pilot figure on the canopy floor
as show. Locate the oval shaped on the canopy
floor and remove the covering. Use epoxy to
glue this into the base of the pilot figure and
glue the cockpit panel in place with C/A glue,
please see pictures as shown.
If you are going to install a pilot figure, please
use a sanding bar to sand the base of the figure
so that it is flat.
2
1
M2x6mm.
INSTALLATION PILOT AND CANOPY.
1) Locate items necessary to install pilot,
cockpit panel, and canopy.
2) A scale pilot is included with this ARF. The
Seagull Pilot included fitting well to the cockpit.
(or you can order others scale pilot figures
made by Seagull factory. They are available at
Seagull distributors.)

19
www.seagullmodels.com
Wing bolt.
ATTACHMENT WING-FUSELAGE.
Wing tube.
Attach the aluminium tube into fuselage.
Insert two wing panels as pictures below.
Battery.
INSTALLING ANTENNA AND THE
BATTERY-RECEIVER.
1) Plugthefive servo leads and the switch
lead into the receiver. Plug the battery pack
lead into the switch also.
 3) Routetheantennain the antennatube
inside the fuselage and secure it to the bot-
tom of fuselage using a plastic tape.
2) Wrap the receiver and battery pack in
the protective foam rubber to protect them
from vibration.
M4x20mm.

ERCOUPE Instruction Manual.
20
With the wing attached to the fuselage, all
parts of the model installed ( ready to fly), and
emptyfuel tanks, hold the modelatthemarked
balance point with the stabilizer level.
Lift the model. If the tail drops when you lift,
the model is “tail heavy” and you must add
weight* to the nose. If the nose drops, it is
“noseheavy” and you must add weight* to the
tail to balance.
Accurately mark the balance point on the top
of the wing on both sides of the fuselage. The
balance point is located 110 mm back from
the leading edge of the wing at the wing root.
This is the balance point at which your model
should balance for your first flights. Later, you
maywish to experiment byshiftingthebalance
up to 10mm forward or back to change the
flying characteristics. Moving the balance
forward may improve the smoothness and
arrow- like tracking, but it may then require
more speed for take off and make it more
difficult to slow down for landing. Moving the
balance aft makes the model more agile with
alighterandsnappier”feel”.Inany case,please
start at the location we recommend .
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
110 MM BACK FROM THE LEADING EDGE
OF THE WING AT THE WING ROOT.
 2) Mount the wingto the fuselage. Using a
couple of pieces of masking tape, place them
onthe top side of the wing 110 mm back from
the leading edge of the wing at the wing root.
 3) Turn the airplane upside down. Place
yourfingersonthemaskingtapeandcarefully
lift the plane .
*Ifpossible, first attempt to balance themodel
bychanging the positionofthereceiver battery
and receiver. If you are unable to obtain good
balance by doing so, then it will be necessary
toadd weight to the noseor tail to achieve the
proper balance point.
110mm.